MULTIX PRO

AX

Service

Adjustment Instructions

© Sie mens AG 1998

The reproduction, transmission or
use of this document or its contents
is not permitted without express
written authority. Offenders will be
liable for damages. All rights,
including rights created by patent
grant or registration of a utility
model _or_ design,_are_ reserved.

English
Print No.: RXB1-140.071.01.04.02 Doc. Gen. Date: 07.01
Replaces: RXB1-140.071.01.03.02
0-2 Revision
Chapter Page Revision
all all 01
all all 02
all all 03
all all 04

Document revision level

The document corresponds to the version/revision level effective at the time of system delivery.
Revisions to hardcopy documentation are not automatically distributed.
Please contact your local Siemens office to order current revision levels.

Disclaimer
The installation and service of equipment described herein is to be performed by qualified per-
sonnel who are employed by Siemens or one of its affiliates or who are otherwise authorized by
Siemens or one of its affiliates to provide such services.
Assemblers and other persons who are not employed by or otherwise directly affiliated with or
authorized by Siemens or one of its affiliates are directed to contact one of the local offices of
Siemens or one of its affiliates before attempting installation or service procedures.

MULTIX PRO RXB1-140.071.01 Page 2 of 6 Siemens AG

Service Rev. 04 07.01 TD SD 21 Medical Solutions
Contents 0-3

Page
1 _______Requirements/Notes ____________________________________________ 1 - 1

Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1- 1

Protection against Laser Radiation . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1
Tolerances . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1
Maximum Torque Values (Table) . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1
Required Test Equipment, Tools and Aids . . . . . . . . . . . . . . . . . . . . . . .1- 2
Text Emphasis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1- 3
Abbreviations Used . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1- 3
Remarks Regarding Working with the Service Software . . . . . . . . . . . . . . . .1-3
Definition of Terms for Cassettes and Radiation . . . . . . . . . . . . . . . . . . . .1-4
Special Symbols. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1- 4

2 _______Column Stand _________________________________________________ 2 - 1

Adjusting the Column Carriage . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2- 1

Adjusting the Bearings for Column Rotation . . . . . . . . . . . . . . . . . . . . . .2- 2
Aligning the Column . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2- 3
Adjusting the Stop Position for Column Rotation . . . . . . . . . . . . . . . . . . . .2- 4
Adjusting the Longitudinal Linearity of the Rail . . . . . . . . . . . . . . . . . . . . .2-5
Adjusting the Column Stop Position (required only for versions without tomo) . . . . .2-6
Adjusting the Bearings on the Column Longitudinal Carriage. . . . . . . . . . . . . .2-7
Support Arm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2 - 8
Rotation Brake for Tube Assembly Rotation. . . . . . . . . . . . . . . . . . . . .2-8
DHA Stop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-9
Adjusting the R21 Potentiometer for the Column SID . . . . . . . . . . . . . . . . . 2 - 10
Adjusting the Potentiometer for Tube Assembly Rotation . . . . . . . . . . . . . 2 - 11
Fine Adjustment of the Angle Display . . . . . . . . . . . . . . . . . . . . . . . 2 - 11
Rotation Origin and R51 Potentiometer (only for tomo versions) . . . . . . . . . 2 - 12
Central Beam Drift in the Transverse Direction . . . . . . . . . . . . . . . . . . . . 2 - 13
Central Beam Drift in the Longitudinal Direction . . . . . . . . . . . . . . . . . . . 2 - 14
Checking the Central Beam for Parallelism to the Bucky . . . . . . . . . . . . . . . 2 - 14
Adjusting the Collimator / Focus-near Plates . . . . . . . . . . . . . . . . . . . 2 - 15
Adjusting the Collimator with the Rotation Flange . . . . . . . . . . . . . . . . . 2 - 16
Adjusting the Collimator without the Rotation Flange . . . . . . . . . . . . . . . 2 - 16
Adjusting the Middle Position of the Rotation Flange . . . . . . . . . . . . . . . 2 - 16
Adjusting the Timer Switch for the Collimator Light Localizer . . . . . . . . . . . 2 - 17
Changing the Format Size (only in ACSS versions) . . . . . . . . . . . . . . . . 2 - 17
Programming the Collimator Display (only in ACSS versions) . . . . . . . . . . 2 - 17
Checking and Adjusting the Coincidence of the Radiation Field to the Light Field 2 - 18
Checking and Adjusting the Manual Format Collimation . . . . . . . . . . . . . 2 - 18
Checking the Lamp Voltage in the Collimator . . . . . . . . . . . . . . . . . . . . . 2 - 20
Adjusting the Laser Light Localizer . . . . . . . . . . . . . . . . . . . . . . . . 2 - 23
Longitudinal Column Movement Limit Switches (only for tomo versions) . . . . . . . 2 - 24
Adjusting the Toothed Belt Tension (only in tomo versions) . . . . . . . . . . . . . . 2 - 24
Adjusting the Vertical Reference SID of 115 cm (only for ACSS,ACSS P) . . . . . . 2 - 25

Siemens AG RXB1-140.071.01 Page 3 of 6 MULTIX PRO

Medical Solutions Rev. 04 07.01 TD SD 21 Service
0-4 Contents

Page
Adjusting the Horizontal SID to the Bucky Wall Stand (only for ACSS, ACSS P) . . .2 - 26
Adjusting the R2 Longitudinal Potentiometer (only in Tomo Versions) . . . . . . . . .2 - 27
Replacing the Support Cable in the Column Stand . . . . . . . . . . . . . . . . . .2 - 28

3 ______ Table _________________________________________________________3 - 1

Patient Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 - 1
Longitudinal Roller Bearings . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 - 2
Bucky Longitudinal Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 - 3
Adjusting the S111, S112 Safety Limit Switches . . . . . . . . . . . . . . . . . . 3 - 3
R11 Potentiometer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 - 3
Adjusting the Toothed Belt Tension . . . . . . . . . . . . . . . . . . . . . . . . 3 - 4
Lift Drive (only for versions with table lift) . . . . . . . . . . . . . . . . . . . . . . . 3 - 5
Manually Adjusting the Lift Drive . . . . . . . . . . . . . . . . . . . . . . . . . . 3 - 5
Adjusting the R10 Lift Potentiometer . . . . . . . . . . . . . . . . . . . . . . . . 3 - 5
S10 / S11 Safety Limit Switch for the Lift Drive (with toothed belt) . . . . . . . . . 3 - 5
Adjusting the Pinion Rack for Height Sensing (R10 Potentiometer) . . . . . . . . 3 - 6
Adjusting the R10 Lift Potentiometer (with pinion rack). . . . . . . . . . . . . . . 3 - 6
Adjusting the S10 / S11 Safety Limit Switches for the Lift Drive (with pinion rack) . 3 - 7
Adjusting the Table Lift Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 - 8
Bucky . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 - 9
General Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 - 9
Grid Blur . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 - 10
Grid Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 - 11
Checking the Safety Circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 - 12
Tabletop Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 - 13
Adjusting the Air Gap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 - 13
Programming the Table Type . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 - 13
Programming the Buzzer Status with a Floating Tabletop . . . . . . . . . . . . .3 - 14
Setting a Customer-specific Table Lift Stop Position (not for FIX) . . . . . . . . .3 - 14
Tomo Device (only for the tomo version) . . . . . . . . . . . . . . . . . . . . . . . .3 - 15
Adjustment of the Tomo Device . . . . . . . . . . . . . . . . . . . . . . . . . .3 - 15
Adjusting the Catapult Bucky - Center . . . . . . . . . . . . . . . . . . . . . . .3 - 15
Adjustment of the Stand - Table Middle . . . . . . . . . . . . . . . . . . . . . .3 - 15
Test Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 - 16
Brief Description of the Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 - 16
Description of the Tomo Test Phantom . . . . . . . . . . . . . . . . . . . . . . . . .3 - 17
Sequence of the Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 - 19
Evaluation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 - 20
Accuracy of the Tomo Height Display . . . . . . . . . . . . . . . . . . . . . . .3 - 20
Adjustment of the Tomo Height. . . . . . . . . . . . . . . . . . . . . . . . . . .3 - 20
Optical Resolution Quality . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 - 20
Tomo Figure and Even Movement of the Tomo Device . . . . . . . . . . . . . .3 - 21
Overall Evaluation of the Tomo Device . . . . . . . . . . . . . . . . . . . . . . . . .3 - 22
Form and Movement of the Tomo Figure . . . . . . . . . . . . . . . . . . . . . .3 - 22
Evenness of the Blur . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 - 23
Tomo Symmetry . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 - 24
Adjusting the Tomo Height Light Localizer (Option with Tomo Versions) . . . . . . . .3 - 25

MULTIX PRO RXB1-140.071.01 Page 4 of 6 Siemens AG

Service Rev. 04 07.01 TD SD 21 Medical Solutions
Contents 0-5

Page
4 _______VERTIX PRO/TOP ______________________________________________ 4 - 1

R1 Potentiometer (only VERTIX TOP) . . . . . . . . . . . . . . . . . . . . . . . . .4- 1

Adjusting the Stop for the 0° Bucky Position (only VERTIX TOP). . . . . . . . . . . .4- 2
Adjusting the S3 / S2 Switches for the 0° / 90° Bucky Positions . . . . . . . . . . . .4- 2
Catapult Bucky 0°/ 90° tilt brake. . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-2
Vertical Stand Carriage Brakes . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-3
Replacing the Vertical Brake, cmpl. . . . . . . . . . . . . . . . . . . . . . . . . .4-3
Replacing the Brake Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4- 3
Adjusting the Vertical Brake . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4- 4
VERTIX TOP Weight Compensation . . . . . . . . . . . . . . . . . . . . . . . . . .4-5
VERTIX PRO Weight Compensation . . . . . . . . . . . . . . . . . . . . . . . . . .4-6
Replacing the Support Cable . . . . . . . . . . . . . . . . . . . . . . . . . . . .4- 9
Bucky . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 - 10
General Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 - 10
Grid Blur . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 - 11
Grid Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 - 12

5 _______Changes to Previous Version_____________________________________ 5 - 1

Siemens AG RXB1-140.071.01 Page 5 of 6 MULTIX PRO

Medical Solutions Rev. 04 07.01 TD SD 21 Service
0-6 Contents

This page intentionally left blank.

MULTIX PRO RXB1-140.071.01 Page 6 of 6 Siemens AG

Service Rev. 04 07.01 TD SD 21 Medical Solutions
Requirements/Notes 1 1-1

Safety Information 1

When performing the work steps and checks, the product-specific safety information con-
tained in this document as well as the general safety information contained in Register 2
must be observed.

Protection against Laser Radiation 1

• This system contains a laser in Class 2.

• When working with the laser light localizer, do not look directly into the laser beam.
• See also ARTD Part 2 "Laser Radiation".

Tolerances 1

General tolerances for linear dimensions per ISO 2768

Limit value over over over over over over over

for nominal 3 mm 6 mm 30 mm 120 mm 400 mm 1000 mm 2000 mm
dimension to to to to to to to
range 6 mm 30 mm 120 mm 400 mm 1000 mm 2000 mm 4000 mm
Admissible ± 0.5 mm ± 1 mm ± 1.5 mm ± 2.5 mm ± 4 mm ± 6 mm ± 8 mm
tolerance

These tolerances apply for all dimensions listed in these instructions providing no other
tolerance is expressly listed after the value.
A tolerance of ±10% is permitted for torque values.

Maximum Torque Values (Table) 1

Nominal thread Screw material Steel per DIN 267 Brass

diameter CuZn
alloy
Hardness rating 4.6 4.8 5.8 8.8 10.9 12.9
M3 0.5 0.67 0.83 1.3 1.9 2.2 0.62
M 3.5 0.76 1.0 1.3 2.0 2.8 3.4 0.95
M4 1.1 1.5 1.9 3.0 4.2 5.1 1.4
M5 2.2 3.0 3.7 6.0 8.4 10.1 2.8
M6 3.8 5.1 6.4 10.2 14.4 17.3 4.8
M8 9.5 12.6 15.8 25.3 35.6 42.7 11.9
M 10 18.7 24.8 31.1 49.8 70.0 84.0 23.3
M 12 32.9 43.8 54.8 87.6 123.3 147.9 41.1

When checking tightness, use the appropriate torque value for hardness rating 8.8.
A tolerance of ± 10% is permitted for torque values.

Siemens AG RXB1-140.071.01 Page 1 of 4 MULTIX PRO

Medical Solutions Rev. 04 07.01 TD SD 21 Service
1-2 Requirements/Notes

Required Test Equipment, Tools and Aids 1

NOTICE All tools, test equipment and aids, with the exception of the "stan-
dard installation tool kit" are listed and specified in the Service
Tools Catalogue.

• Standard installation tool kit

• Open-end wrench, 4 mm
• Spring balance, 5 N 44 29 106 NH 029
• Spring balance, 200 N 44 15 113 RH 090
• Spring balance, 100 N 44 29 122 RH 090
• ESD equipment, Type 8501 - 3M 97 02 606 Y 3121
• Digital multimeter
e.g.: Fluke 8060 A 97 02 101 Y4290
• KV measurement chamber 96 60 754 RE999
• Memory oscilloscope, Fluke 3390A 99 00 861 RE999
• Ground wire test instrument 44 15 899 RV090
• Service PC
• Spirit level (accuracy: 1 mm per meter)
• Spacer gauge (DIN 2275) 52 12 667 F1608
• Copper filter set (10 pcs., 0.3 mm) 44 06 120 RV090
• Pin-hole diaphragm 72 52 067 G2080
• Tomo phantom 44 06 054 RV090
• Torque wrench, 1/4" (3-20 Nm) 34 24 553
• Torque wrench, 20-100 Nm 44 30 906 RH090

MULTIX PRO RXB1-140.071.01 Page 2 of 4 Siemens AG

Service Rev. 04 07.01 TD SD 21 Medical Solutions
Requirements/Notes 1-3

Text Emphasis 1

WARNING All texts labeled with "WARNING" call attention to potential risks
to health or life.

CAUTION All texts labeled with “CAUTION” contain information regarding

risks and measures to avoid dangerous situations.

NOTICE All texts labeled with “NOTICE” contain additional information

about the work step that follows, and whose statement is
intended to provide a better understanding or a warning about
unnecessary and avoidable difficulties.

CAUTION Checks or adjustments which must be carried out with radiation

switched on are labeled with the radiation warning symbol .
While carrying out adjustments labeled this way, radiation protec-
tive clothing must be worn.

Abbreviations Used 1

FFA = Film-focus distance (source-to-image distance or SID)

ISK = Allen screw
RWG = Bucky wall stand
TB = Collimator
DVM = Digital voltmeter
RL = Bucky
DHA = Rotation around the horizontal axis
DVA = Rotation around the vertical axis
SPC = Service PC
SSW = Service software

Remarks Regarding Working with the Service Software 1

Many adjustments are performed using the service software. A help text is available for
the individual input masks. Additional details for the individual adjustment steps are listed
in the help texts.
Select help text: "F1" key
Close help text: "Esc" key

Siemens AG RXB1-140.071.01 Page 3 of 4 MULTIX PRO

Medical Solutions Rev. 04 07.01 TD SD 21 Service
1-4 Requirements/Notes

Definition of Terms for Cassettes and Radiation 1

The terms ”length” and ”width” used and insertion of cassettes should be understood
as illustrated in the sketch:

Length

Tabletop
24 cm x 30 cm cassette

*1

Width X

30 cm x 24 cm cassette

Patient
*1 The first digit
always indicates the
length!
Y

Special Symbols 1

- Symbol for working with radiation.

- Symbol for working with dangerous voltage.

- Symbol for torque value.

- Symbol for working with laser radiation.

MULTIX PRO RXB1-140.071.01 Page 4 of 4 Siemens AG

Service Rev. 04 07.01 TD SD 21 Medical Solutions
Column Stand 2 2-1

NOTICE Prior to making any adjustments on the column, the table and the
rails must be bolted to the floor to the required torque value.

Fig. 1

Adjusting the Column Carriage 2

• Move the column in to the normal position; to do this, position the support arm above the
Bucky.
• Loosen the mounting screws for the 4 eccentric bearings (1/Fig.1)
• Adjust each eccentric bearing so that the bearings are flat against the contact surfaces
and so that when the carriage is moved over its entire range, the bearings can just still be
turned by hand.

Siemens AG RXB1-140.071.01 Page 1 of 30 MULTIX PRO

Medical Solutions Rev. 04 07.01 TD SD 21 Service
2-2 Column Stand

Fig. 2

Adjusting the Bearings for Column Rotation 2

• Move the column into the normal position; to do this, position the support arm above the
Bucky.
• Adjust the 3 rear eccentric bearings (1/Fig.2) by loosening and turning them so that the
bearings are flat against the contact surfaces and can just still be turned.
• Secure the eccentric bearings in position.
• Rotate the column 90° both to the left and to the right and in these positions check, and if
needed, correct the adjustment of the bearings.

MULTIX PRO RXB1-140.071.01 Page 2 of 30 Siemens AG

Service Rev. 04 07.01 TD SD 21 Medical Solutions
Column Stand 2-3

Fig. 3

Aligning the Column 2

• Move the column into the mechanical longitudinal stop position.

• Loosen the mounting screws (1/Fig.3).
• Use the adjustment screws (2/Fig.3) to set the column so that it is plumb on both sides.
• Tighten the mounting screws.
• Check the adjustment.

Siemens AG RXB1-140.071.01 Page 3 of 30 MULTIX PRO

Medical Solutions Rev. 04 07.01 TD SD 21 Service
2-4 Column Stand

Fig. 4

Adjusting the Stop Position for Column Rotation 2

• Move the column into the longitudinal stop position.

• The stop position for column rotation should be adjusted so that the support arm in the
basic position is parallel to the table Bucky.
• Loosen the 4 mounting screws (1/Fig.4).
• Only when this is done can the column stop position be corrected by slightly turning the
control grip on the support arm to the right or left.
• Retighten the 4 mounting screws.

MULTIX PRO RXB1-140.071.01 Page 4 of 30 Siemens AG

Service Rev. 04 07.01 TD SD 21 Medical Solutions
Column Stand 2-5

Fig. 5

Adjusting the Longitudinal Linearity of the Rail 2

NOTICE The position of the guide rail is currently secured in place by roll
pins and should be changed only if absolutely necessary.

• Check the vertical position of the column over the entire movement range:
To do this, place on a spirit level as shown in Fig. 5 and move the column across the rail
and observe any changes in the position of the bubble.
• Shift the position of the guide rail to compensate for any deviations; to do this, loosen the
mounting screws (1/Fig. 5).
• Temporarily remove the switch strike plates to gain access to the external mounting
screws. Be sure to mark their positions!!
• With rails that are mounted using roll pins, remove the safety roll pins:
To do this, remove the mounting screws and carefully pry up the guide rail until the roll
pins can be pulled or tapped out. Turn the mounting screws back in but do not tighten
them yet.
• Move the guide rail accordingly and check the adjustment with the spirit level.
• Check this adjustment at all mounting screws on the guide rail and, if needed, repeat the
above procedure.
• Tighten the screws. Torque 20 Nm.
• Check the correctness of this adjustment and, if necessary, readjust.
• With tomo versions, confirm the correctness of the adjustment by making a tomo
exposure.
• Drill new 4 mm holes next to the old holes for the roll pins.
• Tap in the roll pins until they are flush.

Siemens AG RXB1-140.071.01 Page 5 of 30 MULTIX PRO

Medical Solutions Rev. 04 07.01 TD SD 21 Service
2-6 Column Stand

Fig. 6

Adjusting the Column Stop Position (required only for versions without
tomo) 2

NOTICE Prior to adjusting the stop position, it is preferable to have com-

pleted all other mechanical adjustments for the column.

• Move the column longitudinally into the mechanical stop position.

• Move the Bucky of the table into the mechanical stop position (exists only in versions
without tomo).
• The light localizer in the collimator must line up with the center marker on the cassette
tray.
• To make any correction, remove the top cover panel on the column carriage if this has
not already been done.
• Loosen the eccentric bearings (1/Fig. 6) and turn them accordingly.
• Check the alignment and tighten the bearings.

MULTIX PRO RXB1-140.071.01 Page 6 of 30 Siemens AG

Service Rev. 04 07.01 TD SD 21 Medical Solutions
Column Stand 2-7

Fig. 7

Adjusting the Bearings on the Column Longitudinal Carriage 2

• If not already done, remove the front cover panel on the column. To do this, remove the
top cover panel (1/Fig. 7) on the column and remove the front cover panel (2/Fig.7)
towards the top.
• Adjust the bearings (4/Fig.7) on the column longitudinal carriage (3/Fig.7) so that the
carriage moves centered and parallel in the column.
• To do this, loosen the mounting screws for the bearings and move the bearings (4/Fig.7)
laterally as needed.
• Adjust the contact pressure so that the bearings (4/Fig.7) can just be turned over the
entire movement path.

Siemens AG RXB1-140.071.01 Page 7 of 30 MULTIX PRO

Medical Solutions Rev. 04 07.01 TD SD 21 Service
2-8 Column Stand

Fig. 8

Support Arm 2

Rotation Brake for Tube Assembly Rotation 2

• Use a feeler gauge to adjust the air gap of 0.3, ± 0.1mm on the rotation brake (1/Fig 8):
- Remove the bottom cover panel on the support arm.
- Pivot the tube assembly so that the Allen-head set screws (3) (2/Fig.8) are accessible.
- Loosen each of the Allen-head set screws approx. 1 turn and adjust the air gap.
- Check this adjustment at the two other openings of the air gap and, if needed, correct
them (parallelism).
- Retighten the Allen-head set screws.
- Check the air gap of 0.3, ± 0.1 mm at all 3 accessible openings.

MULTIX PRO RXB1-140.071.01 Page 8 of 30 Siemens AG

Service Rev. 04 07.01 TD SD 21 Medical Solutions
Column Stand 2-9

Fig. 9

DHA Stop 2

• Remove the bottom cover panel on the support arm.

• Place a spirit level on the high voltage connectors.
• Loosen the eccentric screw (1/Fig.9) (10mm open-end wrench).
• Use an open-end wrench (17 mm) to turn the eccentric studs so that the tube assembly
is horizontal (to do this, release the brake at the keyboard).
• Retighten the eccentric screw (10mm open-end wrench).
• After completing the adjustment, move into the stop position from both directions and
check the position in the stop position.
• Position the tube assembly next to the table.
• Position the tube assembly vertically to the min. SID and switch on the light localizer.
• Mark the light field on the floor (collimator centering cross) in the transverse direction.
• Move the tube assembly to the max. SID.
• The drift must be ≤ 5 mm. If necessary, repeat the adjustment.
• Reinstall the cover panels.

Siemens AG RXB1-140.071.01 Page 9 of 30 MULTIX PRO

Medical Solutions Rev. 04 07.01 TD SD 21 Service
2 - 10 Column Stand

Fig. 10

Adjusting the R21 Potentiometer for the Column SID 2

• If not already done, remove the front cover panel on the column. To do this, remove the
top cover panel (1/Fig.10) on the column and remove the front cover panel (2/Fig.10)
towards the top.
• Move the support arm into the top position (reference position).
• Select the following routine in the service software:
- Adjustment – Calibration
- Function groups: Column
- Adjustments: SID Potentiometer
• The display of the reference value must be 0, +/-2.
• To make a correction, use a size 12 open-end wrench to loosen the R21 potentiometer
mount and pull the potentiometer with the pinion gear towards the front so that the pinion
gear can be turned. Then turn the pinion gear until a zero adjustment is achieved with a
tolerance of +/- 2.
• When the value is within tolerance, a signal sounds on the Service PC.
• Press the potentiometer back against the toothed belt and secure it in place.

MULTIX PRO RXB1-140.071.01 Page 10 of 30 Siemens AG

Service Rev. 04 07.01 TD SD 21 Medical Solutions
Column Stand 2 - 11

Fig. 11

Adjusting the Potentiometer for Tube Assembly Rotation 2

• Remove the top cover panel on the support arm housing.

• Move the support arm into the 0o position.
• Select the following routine in the service software:
- Adjustment – Calibration
- Function groups: Column
- Adjustments: Adjustment of the tube assembly rotation potentiometer
• The display of the reference value must be 0 ± 2.
• Loosen the set screws on the R50 pinion gear (1/Fig.11) and turn the potentiometer shaft
by the disk until a zero adjustment is achieved with a tolerance of ± 2.
• When the value is within the tolerance, a signal sounds at the Service PC.
• Resecure the potentiometer shaft in position with the screw.
• Check the completed adjustment by mechanically moving into the 0o position several
times. If necessary, repeat the adjustments.

Fine Adjustment of the Angle Display 2

• Pivot the tube assembly into the 90° left position and the 90° right position and check the
angle display in the control panel display field.
• If the displays are not symmetrical (e.g. 89° & 91°), the display can be readjusted by
adjusting the R51 potentiometer in the particular position.
• Check the display in the opposite direction and, if needed, repeat the adjustment.

Siemens AG RXB1-140.071.01 Page 11 of 30 MULTIX PRO

Medical Solutions Rev. 04 07.01 TD SD 21 Service
2 - 12 Column Stand

Fig. 12

Rotation Origin and R51 Potentiometer (only for tomo versions) 2

• The rotation brake must be in the reference position. To do this, turn the tube assembly
in the uncontrolled mode so that the cable outlet is positioned at the middle of the rotation
brake (brake assembly) on the top.
• Check the R50 potentiometer adjustment (1/ Fig.12) and, if needed, correct it.
• To do this, select the following routine in the service software:
- Adjustment – Calibration
- Function groups: Column
- Adjustments: Initial rotation position potentiometer
• The service software display value must be 0, ± 2.
• If needed, loosen the set screws on the pinion gear (drive side) and turn the pinion gear
(at the potentiometer shaft) until the zero adjustment is reached with a tolerance of ± 2.
• When the value is within tolerance, a signal sounds at the Service PC.
• Resecure the pinion gear at the drive with the screw.

MULTIX PRO RXB1-140.071.01 Page 12 of 30 Siemens AG

Service Rev. 04 07.01 TD SD 21 Medical Solutions
Column Stand 2 - 13

3
2

Fig. 13 Fig. 14

Central Beam Drift in the Transverse Direction 2

• Position the tube assembly in the vertical beam direction approx. 1 m above the floor.
• Switch on the light localizer and line up the marks on the floor with the light field.
• Use the knobs (1/Fig. 13) to collimate a narrow light field in the longitudinal direction.
• Switch on the light localizer and move the tube assembly to the max. SID; when doing
this, check the drift of the light field. The drift may not exceed 5 mm.
Correction:
• Remove the tube assembly cover panel (1/Fig. 14) on the collimator (2 paneling screws).
• Loosen the 2 Allen screws (2/Fig. 14) approx. 2 turns.
• Loosen the 2 set screws (3/Fig.14).
• Adjust the tube assembly around the longitudinal axis.
• Retighten the 2 Allen screws and the set screws.
• Recheck the light field drift.
• Reinstall the tube assembly cover panel.

Siemens AG RXB1-140.071.01 Page 13 of 30 MULTIX PRO

Medical Solutions Rev. 04 07.01 TD SD 21 Service
2 - 14 Column Stand

3 2

Fig. 15 Fig. 16

Central Beam Drift in the Longitudinal Direction 2

• Position the tube assembly in the vertical beam direction approx. 1 m above the floor.
• Switch on the light localizer and line up the marks on the floor with the light field.
• Use the knobs (1/Fig. 15) to collimate a narrow light field in the transverse direction.
• Switch on the light localizer and move the tube assembly into the max. SID; when doing
so, check the drift of the light field. The drift may not exceed 5 mm.
Correction:
- Remove the cover panel on the tube support arm (1/Fig. 16).
- Loosen the M6 nut (2/Fig. 16).
- Adjust the eccentric bearing (3/Fig. 16); to do this, release the rotation brake at the
keyboard.
- Retighten the nut (2/Fig. 16).
- Reinstall the cover panel.

Checking the Central Beam for Parallelism to the Bucky 2

• Mark the center of the tabletop in the longitudinal direction (e.g. using a stretched out
piece of string).
• Switch on the light localizer.
• Adjust the light localizer centering cross with the mark.
• Move the column over the entire movement range and determine the amount of drift in
the longitudinal direction (tolerance must be less than / equal to 5 mm).

MULTIX PRO RXB1-140.071.01 Page 14 of 30 Siemens AG

Service Rev. 04 07.01 TD SD 21 Medical Solutions
Column Stand 2 - 15

1 3
2 3

Fig. 17

Adjusting the Collimator / Focus-near Plates 2

To adjust the focus-near plates, use the template included in the shipment.
(The point (see 2/Fig. 17) with the template is only 2 mm wide.)
• Check the plate adjustment using the adjustment gauge that is provided for this (see 1/
Fig. 17).
• To do this, place on the adjustment gauge and let it be up against the side flange.
• Completely close the plates.
• The focus-near plates (3/ Fig. 17) must be touching the point (see 2/ Fig. 17).
• If necessary, adjust the plates by bending them. When doing this, it is absolutely
necessary to secure the guide for the plate to prevent damaging the drive.
• When the plates are completely open, the focus-near plates may not be symmetrically
flat against the sides of the adjustment gauge.

Siemens AG RXB1-140.071.01 Page 15 of 30 MULTIX PRO

Medical Solutions Rev. 04 07.01 TD SD 21 Service
2 - 16 Column Stand

Fig. 18 Fig. 19

Adjusting the Collimator with the Rotation Flange 2

• Adjust the rotation flange on the collimator (use PD2 Longtime):

- Tighten one of the 3 screws (1/Fig.18) so that the collimator can just no longer be
turned.
- Hook a spring balance (100 N) onto the lever for the rotation flange, see Fig.18.
- Loosen this screw again until the collimator turns when a force of 20 - 30 N is applied to
the spring balance.
- Adjust one of the two remaining screws as described above to 40 - 50 N and the
third screws to 60 - 70 N using the spring balance.

Adjusting the Collimator without the Rotation Flange 2

• Adjust the collimator without the rotation flange:

- Tighten one of the 3 screws (1/Fig.18) so that the collimator can just no longer be
turned.
- Turn back this screw 1/2 turn.
- Repeat this routine with one of the other screws.
- Tighten the 3rd screw so that the collimator can just no longer be turned.
- Retighten the 1st and 2nd screw the 1/2 turn.

Adjusting the Middle Position of the Rotation Flange 2

• Adjust the middle position of the collimator rotation flange:

- Loosen the set screw (1/Fig.19) (1.5 mm Allen wrench).
- Switch on the collimator light localizer and adjust the light field so that it is parallel to the
long edge of the tabletop by turning the eccentric bearing (2/ Fig.19) with the square
wrench (4 mm). At the max. SID and with the collimator completely open, the difference
may not exceed 3 mm.
- Retighten the Allen-head set screw (1/Fig.19).

MULTIX PRO RXB1-140.071.01 Page 16 of 30 Siemens AG

Service Rev. 04 07.01 TD SD 21 Medical Solutions
Column Stand 2 - 17
Adjusting the Timer Switch for the Collimator Light Localizer 2

Light Localizer Timer Switch for the Man. Collimator

• Remove the cover panel on the collimator.
• Adjust the switch-on time to between 10 s and 90 s using the Dip switches on D5 board
switch S1:
- Program the desired switch-on time according to the table in Wiring Diagram G052G-
1B-1 for the manual collimator.
Light Localizer Timer Switch for the ACSS Collimator
• Adjust the light localizer switch-on time in the service software to between 20 s and
90 s:
• To do this, select the following routine per the service software:
- Menu: Adjustment, Calibration
- Function groups: Aperture
- Adjustment: Adjustment of the light localizer switch-on time

Changing the Format Size (only in ACSS versions) 2

• If needed, the automatic format blanking in the ACSS mode can be reduced.
• To do this, select the following routine per the service software:
- Menu: Adjustment - Calibration
- Function groups: Aperture
- Adjustments: Adjustment of the collimator correction values

Programming the Collimator Display (only in ACSS versions) 2

Program the type of cassettes used on side and the SID displays to be uniform in "cm" or
"inch".
• To do this, select the following routine per the service software:
- Menu: Adjustment
- Function group: Aperture
- Adjustment: Adjustment of display.

For additional options, see the screens and Help texts for the collimator SSW
beginning with version VB01A

Siemens AG RXB1-140.071.01 Page 17 of 30 MULTIX PRO

Medical Solutions Rev. 04 07.01 TD SD 21 Service
2 - 18 Column Stand

Length

Light field
Marker

Side marker

Fig. 20

Checking and Adjusting the Coincidence of the Radiation Field to the Light
Field 2

Checking and Adjusting the Manual Format Collimation 2

• Position the central beam so it is vertical and place a 20 cm x 30 cm (10”x12”) cassette

on the tabletop.
• Use the tape measure in the collimator to set a vertical SID of 115 cm to the top surface
of the cassette.
• Use the knobs on the collimator to exactly set a display of 18 cm x 24 cm or
8” x 10”; the exposure is also used for checking the manual format collimation.
• Switch on the light localizer.
• Place a radio-opaque marker (e.g. washer, coin) on the cassette as shown in Fig. 20.
• Place on a washer as a side marker.
• Trigger an exposure: ( ; 50 kV; 5 mAs) and develop the film.
• Use a waterproof felt marker to make a note of the following data on the developed film:
set SID; focus size; film size; radiation field size

Y1
Film

Light field

X2 X1

Radiation field

Y2

Fig. 21

MULTIX PRO RXB1-140.071.01 Page 18 of 30 Siemens AG

Service Rev. 04 07.01 TD SD 21 Medical Solutions
Column Stand 2 - 19

1 2
2

Fig. 22

Evaluation: Coincidence of Light Field to Radiation Field

• Measure the differences on all four sides (X1, X2, Y1, Y2) between the edges of the light
field and the edges of the radiation field as shown in Fig.20.
• Calculate the total amount of difference in the X and Y directions (without regard to the
mathematical sign in front).
- The difference in width X and the difference in length Y may not exceed 1.4 cm
at an SID of 115 cm.
Carry Out a Correction to the Light Field only if Absolutely Necessary:
• Remove the cover over the lamp in the collimator.
• Adjust the light field in the X and Y axes:
- Loosen the 2 Allen screws (1/Fig.22) approx. 1/2 turn.
- Adjust the light field by means of the 2 hex screws (2/Fig.22).
Evaluation: Manual Format Collimation
• Measure the width and length of the radiation field and compare this to the value set on
the collimator scale (115 cm SID, 18 cm x 24 cm or 8” x 10” width and length).
• Calculate the difference of the radiation field size to the length and width of the format
that has been set.
- The difference in each of the two directions (length and width) may not exceed 1.4 cm.

Siemens AG RXB1-140.071.01 Page 19 of 30 MULTIX PRO

Medical Solutions Rev. 04 07.01 TD SD 21 Service
2 - 20 Column Stand

1 2 3

Fig. 23

Checking the Lamp Voltage in the Collimator 2

• The collimators used in the MULTIX PRO / TOP system are shown in the illustration, Fig.
23.
- 1. Collimator 04 68 215 G052G (ACSS)
- 2. Collimator 04 68 207 G052G (manual)
- 3. Collimator RM 70 06 625 GH001 (manual)
Checking the Lamp Voltage for Collimator Model G052G
(1 and 2/Fig. 23)
• The light localizer lamp in collimator G052G (1 and 2 Fig. 23), beginning with Serial
Number 3001, can be controlled in the controlled or uncontrolled mode beginning with
introduction of a new power supply in the MULTIX table.
Programming is possible using the S1.4 switch in collimator G052G!
- Controlled mode = voltage stabilization (S1.4 = ON)
- Uncontrolled mode = direct power supply from the transformer (S1.4 = OFF)

NOTICE To increase the operating life of the light localizer lamp, if possi-
ble, it should be operated in the uncontrolled mode.
Prerequisite for the uncontrolled mode of collimator G052G:
1. In the M8 T1 transformer, four additional taps for the uncon-
trolled mode of the collimator must be present:
35, 36, 37, 38, see (1/Fig. 25)
The 16 = 34 Volt tap may used only for the controlled mode!!!
2. Set switch S1.4 in the collimator to OFF
(voltage regulator off).
Measure a lamp voltage of 23.5 V,+/- 0,5 directly at the lamp base.

MULTIX PRO RXB1-140.071.01 Page 20 of 30 Siemens AG

Service Rev. 04 07.01 TD SD 21 Medical Solutions
Column Stand 2 - 21

Fig. 24 Fig. 25

• Check for correct connection of the collimator at M8.T1.X3 in the transformer for MULTIX
(1/Fig. 25):

- MULTIX PRO M8.X3.35 = 26 Volt (AC) factory setting

- Reserve M8.X3.36 = 27 Volt (AC)
- MULTIX TOP M8.X3.37 = 29 Volt (AC) factory setting
- Reserve M8.X3.38 = 30 Volt (AC)
• Remove the cover over the collimator light localizer lamp.
• Switch on the collimator light localizer lamp and measure the voltage (23.5 Volt) directly
at the lamp base (1/Fig. 24).

NOTICE The lamp voltage with a line voltage of 400/440/480 Volt should be
as close as possible to 23.5, +/- 0.5 Volt. Select the tap at M8.X3 so
that the required value is almost reached.
The upper limit of 24 Volt may not be exceeded under any circum-
stances.

• If the specified tolerance is exceeded, switch to another, appropriate tap.

Siemens AG RXB1-140.071.01 Page 21 of 30 MULTIX PRO

Medical Solutions Rev. 04 07.01 TD SD 21 Service
2 - 22 Column Stand

Fig. 26 Fig. 27

Checking the Lamp Voltage for Collimator Model GH001

(3/Fig. 23)
• Remove the rear cover (1/Fig. 26) on the RM collimator.

NOTICE The RM collimator is always operated in the uncontrolled mode; a

choice is not possible!

• Check for correct connection of the collimator at M8.T1.X3 in the transformer for MULTIX
(1/Fig. 25):
- MULTIX PRO M8X3.35 = 26 Volt (AC) factory setting
- Reserve M8X3.36 = 27 Volt (AC)
- MULTIX TOP M8X3.37 = 29 Volt (AC) factory setting
- Reserve M8X3.38 = 30 Volt (AC)
• Switch the collimator light localizer and measure the voltage (23.5 Volt) directly at the
lamp base (1/Fig. 27).

NOTICE With line voltages of 400/440/480 Volt, the lamp voltage should be
as close as possible to 23.5, +/- 0.5 Volt. Select the tap at M8.X3 so
that the required value is almost reached.
The upper limit of 24 Volt may not be exceeded under any circum-
stances.

MULTIX PRO RXB1-140.071.01 Page 22 of 30 Siemens AG

Service Rev. 04 07.01 TD SD 21 Medical Solutions
Column Stand 2 - 23

2
1

4 3

Fig. 28

Adjusting the Laser Light Localizer 2

• To adjust the laser light localizer, first only slightly loosen the Allen screw (1/Fig. 28)
(pivot point) (2/Fig. 28); then the laser light localizer must be aligned laterally to the table
or vertically to the VERTIX.
• If the laser light localizer is not straight, slightly loosen the Allen screw (3/Fig. 28) and
turn the laser (4/Fig. 28) accordingly.

Siemens AG RXB1-140.071.01 Page 23 of 30 MULTIX PRO

Medical Solutions Rev. 04 07.01 TD SD 21 Service
2 - 24 Column Stand

3
1

Fig. 29

Longitudinal Column Movement Limit Switches (only for tomo

versions) 2

• Move the stand carriage to approx. 40 mm in front of the mechanical stop at both the left
and right ends.
• Adjust the position of the switch strike plates for the safety limit switches (1/Fig. 29) in the
long holes so that the S1 and S2 switches are positively actuated in these positions.

Adjusting the Toothed Belt Tension (only in tomo versions) 2

• Move the column stand up against the left or right mechanical stop.
• Determine the middle of the toothed belt between the column carriage and the
tensioning piece and hook on a spring balance at this location.
• Deflect the toothed belt with a force of 20 N vertically to the toothed belt.
• When this force is applied, the toothed belt should be deflected 20 mm.
• To make a correction, adjust the position of the tensioning pieces (2/Fig. 29) in the
mounting holes.
• If this means of correction is not sufficient, the toothed belt can be moved at the clamping
location (3/Fig. 29).

MULTIX PRO RXB1-140.071.01 Page 24 of 30 Siemens AG

Service Rev. 04 07.01 TD SD 21 Medical Solutions
Column Stand 2 - 25

15
1 m

Fig. 30

Adjusting the Vertical Reference SID of 115 cm (only for ACSS,ACSS P)2
• Use the tape measure in the collimator to set an SID of 109.5 cm to the top surface of the
tabletop (the distance of the film to the top surface of the tabletop is 5.4 cm).
• Select the following routine per the service software:
- Function group: Column
- Adjustment: Adjustment of the Reference SID
- Carry out the adjustment per the service software.
• Completely insert the cassette tray
➪ the set SID will be displayed.

Measuring edge for

the tape measure

Siemens AG RXB1-140.071.01 Page 25 of 30 MULTIX PRO

Medical Solutions Rev. 04 07.01 TD SD 21 Service
2 - 26 Column Stand

2m

2 00
m

Fig. 31 Fig. 32

Adjusting the Horizontal SID to the Bucky Wall Stand (only for ACSS,
ACSS P) 2

• Position the tube assembly to the Bucky wall stand as shown in Fig. 31.
• Use the tape measure in the collimator to set an SID of 195.9 cm to the front cover on the
Bucky wall stand (the distance of the film to the top surface of the front cover is 4.1 cm).
• Select the following routine per the service software:
- Function group: Column
- Adjustment: Adjustment of the SID to the Bucky wall stand
- Enter 200 at the Service PC for the horizontal SId and confirm the adjustment with OK.
• If necessary, correct the 2.0 m SID adhesive label and the marker line (from the
accessory pack) as shown in Fig. 32.

MULTIX PRO RXB1-140.071.01 Page 26 of 30 Siemens AG

Service Rev. 04 07.01 TD SD 21 Medical Solutions
Column Stand 2 - 27

R2 poten.

Fig. 33

NOTICE Carefully handle the 10 -turn potentiometer; do not over-turn it.

Adjusting the R2 Longitudinal Potentiometer (only in Tomo

Versions) 2

• Move the column all the way to the left.

• The R2 potentiometer is located at the base of the column.
• Select the following routine per the service software:
- Function group: Column
- Adjustment: Adjustment of the column longitudinal potentiometer
- Loosen the set screws (1/Fig. 33) for the potentiometer coupling.
- Use the R2 potentiometer to adjust to 0, ± 2 on the Service PC display.
- Retighten the set screws.
- Click on "OK" at the Service PC to confirm the adjustment.

Siemens AG RXB1-140.071.01 Page 27 of 30 MULTIX PRO

Medical Solutions Rev. 04 07.01 TD SD 21 Service
2 - 28 Column Stand

Fig. 34 Fig. 35

Replacing the Support Cable in the Column Stand 2

• The support cable must be replaced after 3 years of operation, or when:

12 or more broken single strands of the cable of over 100 mm can be found, or 3 or more
broken single strands of the cable of 10 mm can be found.
• Even if only one single strand is broken, the operator must be informed that continued
use of the stand could pose a safety risk to the patient and operator. The stand may not
be used until the defective cable has been replaced.
• To replace the cable, move the support arm down until the threaded holes in the
counterweight are lined up with the holes in the column (1/ Fig. 34). Secure the
counterweight in place with two M8 Allen screws and the appropriate U-washers.
• Raise the support arm approx. 30 cm and then release it; when this is done, the anti-drop
brake must respond and hold the support arm. Place a wooden block under the support
arm to support it.
• Take out the head piece (1/ Fig. 35) with the cable pulley and brake towards the top and
secure it to the column with a length of string.

MULTIX PRO RXB1-140.071.01 Page 28 of 30 Siemens AG

Service Rev. 04 07.01 TD SD 21 Medical Solutions
Column Stand 2 - 29

4
1

2 3
2

Fig. 36 Fig. 37

• After carefully removing the safety plate and the bolt (2/ Fig. 36), remove the support
cable on the counterweight (1/ Fig. 36).
• Remove the screw (1/ Fig. 37) and the safety plate.
• If the support arm is secured with a wooden block or with another object, pull the anti-
drop brake lever (2/ Fig. 37) in the direction of the compression spring and bolt (3/ Fig.
37) forward.
• Disconnect the cable (4/ Fig. 37) from the anti-drop brake.

Siemens AG RXB1-140.071.01 Page 29 of 30 MULTIX PRO

Medical Solutions Rev. 04 07.01 TD SD 21 Service
2 - 30 Column Stand

Fig. 38

• Remove the snap ring with a pair of snap ring pliers at the head piece (1/ Fig. 38) and
remove the cable after removing the two safety screws (2/ Fig. 38).
• Insert a new cable into the head piece and secure it to the anti-drop brake and
counterweight. Reinstall the head piece; when doing this, make sure it is properly
seated.
• Reinstall the anti-drop brake lever on the support arm. Only slightly lift the support arm
again; when doing this, release the anti-drop brake by pulling on the support arm in the
head-end direction or by pressing the anti-drop brake against the compression spring
and slowly releasing the support arm.
• Remove the safety screws (1/ Fig. 34) on the counterweight.

MULTIX PRO RXB1-140.071.01 Page 30 of 30 Siemens AG

Service Rev. 04 07.01 TD SD 21 Medical Solutions
Table 3 3-1

1
2

Fig. 1

Patient Table 3

Transverse Roller Bearings

• Adjusting the 2 roller bearings (1/Fig. 1) on both sides of the transverse carriage:
- Remove the tabletop.
- Adjust the roller bearing (1/Fig. 1) so that the 2 roller bearings can just still be turned by
hand (2/Fig. 1).
- Carry out the same adjustment on the other side of the transverse carriage.
• Adjust the 4 roller bearings (3/Fig. 1) on both sides of the transverse frame:
- Adjust the 4 roller bearings (3/Fig. 1) so that the 4 roller bearings can just still be turned
by hand.
- Switch on the light localizer and check the parallelism of the longitudinal edge of the
tabletop to the tube assembly (max. admissible difference ± 3 mm over the entire
length of the tabletop).
- If necessary, readjust the 4 roller bearings (3/Fig. 1).

Siemens AG RXB1-140.071.01 Page 1 of 26 MULTIX PRO

Medical Solutions Rev. 04 07.01 TD SD 21 Service
3-2 Table

2
1

2
2

1 1

Fig. 2 Fig. 3

Longitudinal Roller Bearings 3

• Adjusting the 4 eccentric bearings (1/Fig. 3) for longitudinal movement of the tabletop.
- Remove the cover panel (1/Fig. 2) with the expansion spring (2/Fig. 2).
- Remove the rubber bumper with set screws and nuts (3,4,5/Fig. 3).
- Move the tabletop back so that the eccentric bearings (2/Fig. 3) can be adjusted.
- Loosen the Allen-head set screw (1/Fig. 3) (2mm Allen wrench).
- Adjust the eccentric bearing (2/Fig. 3) so that can just still be turned by hand.
- Retighten the Allen-head set screw (1/Fig. 3).
• Carry out this adjustment for all 4 eccentric bearings.
• Check for easy movement of the tabletop over the entire movement path.

NOTICE The eccentric bearings have been optimally adjusted if the eccen-
tric bearings can just still be stopped when the tabletop is moved.

MULTIX PRO RXB1-140.071.01 Page 2 of 26 Siemens AG

Service Rev. 04 07.01 TD SD 21 Medical Solutions
Table 3-3

Fig. 4

Bucky Longitudinal Drive 3

Adjusting the S111, S112 Safety Limit Switches 3

• Adjusting the switch strike plate (1/Fig. 4) for the S111 safety limit switch:
- Move the Bucky up against the end stop (2/Fig. 4).
- Adjust the strike plate (1/Fig. 4) so that the safety limit switch (3/Fig. 4)
is positively actuated approx. 1 cm in front of the Bucky end position.
• Adjust the strike plate for the S112 safety limit switch to correspond to the S111 safety
limit switch.

R11 Potentiometer 3

• To do this, select the following routine per the service software:

- Menu: Adjustment – Calibration
- Function groups: Bucky
- Adjustments: Adjustment of the catapult Bucky potentiometer
• The catapult Bucky must be located in the reference position. To do this, move the
catapult Bucky into the middle position.
• The service software display value must be 0, ± 2.
• The R11 potentiometer is located in the table, on the right side.
• Disengage the potentiometer shaft from the toothed belt gear by loosening the set
screws.
• Carry out the zero adjustment by turning the disk on the potentiometer shaft. When the
value is within the tolerance (± 2), a signal sounds at the Service PC.

Siemens AG RXB1-140.071.01 Page 3 of 26 MULTIX PRO

Medical Solutions Rev. 04 07.01 TD SD 21 Service
3-4 Table

320 mm
1

3 22 mm
2

F = 2N

Fig. 5

Adjusting the Toothed Belt Tension 3

NOTICE Remove the cover panel (3/Fig. 5) and check whether there is a
red adjustment screw for adjusting the toothed belt tension.

• Adjusting the toothed belt tension (1/Fig. 5) for the Bucky drive:
- Move the Bucky (1/Fig. 5) all the way to the right (arrow/Fig. 5).
- Loosen the 2 countersunk Allen screws (2/Fig. 5) approx. 1 turn.
- Press the holder with the toothed belt gear in the direction of the arrow, Fig.5
or
if there is an adjustment screw, use it to adjust the tension.
- Adjust the toothed belt tension as indicated in Fig.5: F = 2N

MULTIX PRO RXB1-140.071.01 Page 4 of 26 Siemens AG

Service Rev. 04 07.01 TD SD 21 Medical Solutions
Table 3-5

3
1

2
+1
m
m
Fig. 6 Fig. 7

Lift Drive (only for versions with table lift) 3

Manually Adjusting the Lift Drive 3

• If there is a malfunction, the lift drive can be moved manually (see Fig. 6).
The wrench attachment needed for this is located underneath the lift motor.

Adjusting the R10 Lift Potentiometer 3

• Set the table to a height of 750, ±2 mm (reference position):

- The dimension 750, ±2 mm is measured from the top surface of the tabletop (not from
the extruded rail) to the bottom edge of the lifting base.
• Adjust the potentiometer (1/Fig. 7) so that the toothed belt is slightly slack.
• Adjust the reference value using the service software.
- Menu: Adjustment, Calibration
- Function groups: HOST table
- Adjustments: Adjustment of table lift potentiometer
• Adjust the potentiometer as follows:
- Loosen the two set screws on the pinion gear of the R10 potentiometer (4/Fig. 7) and
turn the potentiometer shaft at the disk (4/Fig. 7) until the reference value is displayed
on the PC.
- Confirm with “ok”.
- Resecure the potentiometer shaft with the set screws.

S10 / S11 Safety Limit Switch for the Lift Drive (with toothed belt) 3

The reference value of the lift potentiometer must be adjusted exactly.

• Adjusting the S10 / S11 safety limit switches per Fig. 7.
- Move the table into the highest position and adjust the S10 safety limit switch (2/Fig. 7)
(dimension: 2, +1 mm).

Siemens AG RXB1-140.071.01 Page 5 of 26 MULTIX PRO

Medical Solutions Rev. 04 07.01 TD SD 21 Service
3-6 Table
- Move the table into the lowest position and adjust the S11 safety limit switch (3/Fig. 7)
(dimension: 2 +1mm).

2 6 7
4

1
3

Fig. 8

Adjusting the Pinion Rack for Height Sensing (R10 Potentiometer) 3

• Use the lift drive to carefully position the table so that the switch ring (1/Fig.8) dips into
the hole.
• Adjust the switch ring (1/Fig.8) so that it is centered in the hole:
- To do this, shift the position of the bracket (2/Fig.8) and the assembly (3/Fig.8).
• Adjust a play of 0.1, +0.1 mm between the pinion rack (4/Fig.8) and the pinion (5/Fig.8):
- Loosen the 2 screws (6/Fig.8) approx. 1 turn.
- Insert a piece of paper that is 0.1, +0.1 mm thick (7/Fig.8) between the plastic guide
and the pinion rack (see detailed enlargement, Fig.8).
- Press the plastic guide against the pinion rack and when doing so, retighten the 2
screws (6/Fig.8).
- Remove the piece of paper.
• Use the lift drive to raise the table the complete distance and when doing so, check the
function of the pinion rack.

Adjusting the R10 Lift Potentiometer (with pinion rack) 3

• Set the table to a height of 750, ±2 mm (reference position):

- Measure the dimension 750, ±2 mm from the top surface of the table (not the profile
rail) to the bottom edge of the lift base.
• Adjust the reference value using the service software.
- Menu: Adjustment, Calibration
- Function groups: HOST table

MULTIX PRO RXB1-140.071.01 Page 6 of 26 Siemens AG

Service Rev. 04 07.01 TD SD 21 Medical Solutions
Table 3-7
- Adjustments: Adjustment of table lift potentiometer

2, 4
+1
m m

2
+1
m
2 m

Fig. 9

• Adjust the potentiometer as follows:

- Loosen the two set screws on the pinion gear of the R10 potentiometer (5/Fig. 9) and
turn the potentiometer at the disk (6/Fig. 9) until the reference value is displayed on the
PC.
- Confirm with “ok”.
- Resecure the potentiometer shaft with the set screws.

Adjusting the S10 / S11 Safety Limit Switches for the Lift Drive (with pinion
rack) 3

The reference value of the lift potentiometer must be adjusted exactly.

• Adjust the S10 / S11 safety limit switches as indicated in Fig. 9:
- Move the table into the highest position and adjust the S10 safety limit switch (2/Fig. 9)
and the switch ring (1/Fig. 9) to the S10 safety limit switch (2/Fig. 9) as indicated in
Fig.9 (dimension: 2, +1 mm)
- Move the table into the lowest position and adjust the switch strike plate (3/Fig. 9) to the
S11 safety limit switch (4/Fig. 9) as indicated in Fig.9 (dimension: 2, +1 mm).
• The adjustments must be checked using a loaded lift movement.

NOTICE Beginning with service software VB01A, table lift (software stop)
at the top and bottom can each be limited by 20 mm in the SSW.

Siemens AG RXB1-140.071.01 Page 7 of 26 MULTIX PRO

Medical Solutions Rev. 04 07.01 TD SD 21 Service
3-8 Table

NOTICE If the safety limit switches can be actuated when table lift is initi-
ated, the cause could be the factory settings or errors in measure-
ment. For exact adjustment, proceed according to the two
Service Instructions, AX067/99/I and AX090/00/I.

Fig. 10

Adjusting the Table Lift Guide 3

• Move the table into the middle lift position.

• Adjust the eccentric bearing (1/Fig. 10) so that there is always 1 eccentric bearing in one
plate, both top and bottom, that can still just be turned by hand.
• Carry out the adjustment on the other 3 lift guides.
• Check the function of the table lift.

NOTICE If unusual noises or vibrations occur when table lift is performed,

see also the Service Instructions, AX067/99/I

MULTIX PRO RXB1-140.071.01 Page 8 of 26 Siemens AG

Service Rev. 04 07.01 TD SD 21 Medical Solutions
Table 3-9

Bucky 3

General Adjustments 3

Wiring Diagram G051G is the reference document for configuration of the Dip switches
and jumpers:

Set jumper X4.1-2 "END-NOTE" if the Bucky is installed in the VERTIX.

Set jumper X4.2-3 "NO-END-NOTE" if the Bucky is installed in the MULTIX.

S3 DIP switch:
S3.1 = OFF i.e. Automatic mode: specification of the advance time for the grid is
made in the service software. Also select this position for the manual
MULTIX versions because here, too, the advance time is set in the
service software.

S3.2 = OFF If grid type 12/40 is used

(high speed = installation in the MULTIX)

ON If grid type 17/70 is used

(slow speed = installation in the VERTIX)

NOTICE Allocation of the grid speed to the type of grid used is critical for
quality exposures.
If the grid type is changed (even later), a change of the grid speed
is absolutely necessary.

S3.3 = ON i.e. set the transfer rate to 100kBaud.

S3.4 = OFF Plane A means the Bucky is installed in the MULTIX.

ON Plane B means the Bucky is installed in the VERTIX.

S3.5 = ON Mischbetrieb (Kassetten in inch/cm) zulässig

OFF Mischbetrieb nicht zulässig

The MANUAL MODE programming is not relevant in this system. In this system, program-
ming is always made in the software.

HINWEIS Die Zuordnung der Rastergeschwindigkeit zum verwendeten

Rastertyp ist grundlegend für auswertbare Aufnahmen.
Bei einem (auch späterem) Wechsel des Rastertyps ist die
Änderung der Rastergeschwindikeit unbedingt erforderlich

Siemens AG RXB1-140.071.01 Page 9 of 26 MULTIX PRO

Medical Solutions Rev. 04 07.01 TD SD 21 Service
3 - 10 Table
Grid Blur 3

Carry out a check for every application unit with a moveable grid to determine at which
exposure time, tg, grid stripes are no longer visible on the film.

HINWEIS Werkseinstellung:
Vorhaltezeit (Default) ist 34 ms für POLYDOROS SX/LX/Lite
Wird die Anlage mit einem POLYDOROS IT geliefert ist dieser
Wert (als Ausgangsbasis) auf 0 ms zu ändern.

Procedure:
• At the generator, select small focus, 80%, 40 kV and middle IONTOMAT chamber.
• Set an SID of 115 cm.
• Insert a 18 x 24 cm cassette without film.
• Trigger exposure beginning with 40 kV until the exposure times of approx. 3 ms result
(increasing the kV value -> exposure time becomes briefer).
• Insert a 18 x 24 cm cassette with film.
• Trigger the exposure with the previously determined kV value.
• Using a magnifier at the light box, determined at which switch time grid stripes are no
longer visible on the film.
• If the grid advance time must be changed, carry out the test setup and the measurement
as shown in Fig. 37. The generator delay time can be changed using the Service PC as
described in the chapter “Programming the System”.
- Grid stripes at exposure times of ≥ 3 ms are inadmissible.

MULTIX PRO RXB1-140.071.01 Page 10 of 26 Siemens AG

Service Rev. 04 07.01 TD SD 21 Medical Solutions
Table 3 - 11
Grid Drive 3

The advance time is set at the factory to a value of 34 ms.

NOTICE The check of the advance time entered is performed in "Checking

the Grid Blur".

The relationship between advance time and the grid movement and thus the problem of
grid stripes is illustrated in the following graphic.

Exposure!
Programmed generator delay time
corresponds to the actual measured
Grid path delay time of the generator being used

Turning point

34 ms

Middle position

Grid start

Park position

t
Delay time in the SSW 180 ms 90 ms 0 ms

Channel 1 Channel 2

Radiation enable
Generator delay time

U1 measured

HW signal
radiation enable Physical occurrence of
radiation

Channel 1: Test points on backplane D54 X109 (U1) and X110 (ground)
Channel 2: Radiation measured with measuring chamber, Part No.: 96 60 754 RE999

Fig. 11

Top diagram (Fig. 11): temporal progression of grid movement with the time at which radi-
ation is triggered.
Bottom diagram (Fig. 11): Enable signal relative to grid movement.

Siemens AG RXB1-140.071.01 Page 11 of 26 MULTIX PRO

Medical Solutions Rev. 04 07.01 TD SD 21 Service
3 - 12 Table

NOTICE The programmed advance time applies for both Buckys

contained in the system. If different grid types are used and thus
the grid speeds are different, optimization of the advance time
may be called for.

Example:
Very brief exposure times and slow grid speed (grid type 17/70) require reducing the
advance time to almost 0 ms to place the grid focused to the film.

The advance time can be entered using the Service PC.

To do this, select the following routine per the service software:
- Adjustment-Calibration
- Function groups:Host Table
- Adjustment of Bucky lead time

Checking the Safety Circuit 3

Prior to checking the electrical function of the safety circuit, it is recommended that the
mechanical adjustment of all limit and safety limit switches be completed.
The function of the safety circuit is checked by pressing all switches in the circuit. When
the safety circuit is interrupted, the k2 safety breaker in the table base is deenergized and
the red control lamp on the table goes on.
• Press the following switches, one after the other, and check the function of the safety
circuit.
- Lift sensing S10 und S12
- Emergency stop switch

• With the tomo version, also check the following switches. In addition, select any tomo
program at the control console.
- Bucky longitudinal drive S111 and S112 (for this remove the Bucky cover
panel)
- Column carriage. long. drive S1 and S2 (switches are located under the column
stand)

NOTICE When the S1 key is pressed on the D54, the safety circuit is
jumpered.

MULTIX PRO RXB1-140.071.01 Page 12 of 26 Siemens AG

Service Rev. 04 07.01 TD SD 21 Medical Solutions
Table 3 - 13

Tabletop Brakes 3

3
2

1
2

1 1

Fig. 12 Fig. 13

Adjusting the Air Gap 3

NOTICE Prerequisite for correct adjustment of the air gap is that the bear-
ings for longitudinal tabletop movement (see patient table) be
exactly adjusted.

• Remove the stops on the tabletop (1/2/3 Fig.13) and move the tabletop to the side.
• Use a spacer gauge to check the air gap between the piston brake and the rail.
The air gap should be 0.3, + 0.2 mm.
• To make any correction, remove the side cover panel.
• Loosen the mounting screws (1/Fig.12) on the mounting bracket (2/Fig.12) for the piston
brakes (3/Fig.12) and correct the position of the piston brakes inside the holes.

Programming the Table Type 3

The kick switch for the table longitudinal-transverse brake can be configured as a "dead-
man’s switch" or as a sensor.
• To do this, select the following routine per the service software:
- Adjustment - Calibration
- Functiongroup: HOST Table
- Adjustment: Adjustment of the table sensor method

Siemens AG RXB1-140.071.01 Page 13 of 26 MULTIX PRO

Medical Solutions Rev. 04 07.01 TD SD 21 Service
3 - 14 Table
Programming the Buzzer Status with a Floating Tabletop 3

- Only with the "Sensor" table type

A buzzer sound can be activated or deactivated when the tabletop brakes are released.
• To do this, select the following routine per the service software:
- Adjustment - Calibration
- Function group:Host table
- Adjustments: Adjustment of the buzzer status with floating tabletop.

Setting a Customer-specific Table Lift Stop Position (not for FIX) 3

In discussion with the customer, it is possible to adjust the table lift individually (adaptation
to the existing bed height, etc.). This position (working position) can be moved into auto-
matically from down or from up.
To do this, select the following routine per the service software:
- Adjustment-Calibration
- Function group: Host table
- Adjustment: Adjustment of customer-specific lift stop position.

MULTIX PRO RXB1-140.071.01 Page 14 of 26 Siemens AG

Service Rev. 04 07.01 TD SD 21 Medical Solutions
Table 3 - 15

Tomo Device (only for the tomo version) 3

Adjustment of the Tomo Device 3

• To do this, select the following routine per the service software:

- Function groups: Host table
- Adjustments: Adjustment of the tomo device
- Schichtrichtung von links (längerer Schenkel der Längslaufbahn befindet sich auf der
linken Seite) bzw. rechts (längerer Schenkel der Längslaufbahn befindet sich auf der
rechten Seite) auswählen und mit "Enter" bestätigen.

appr. 685 mm Tomo from right

appr. 585 mm Tomo from left 1

Fig. 14

Adjusting the Catapult Bucky - Center 3

• Move the column into the stop position.

• Center the catapult Bucky to the column using the line light localizer.
- The dimensions in Fig.14 are used to check the tomo initial position on the right or left.
• Then, select the following routine per the service software:
- Adjustment-Calibration
- Function groups: Bucky
- Adjustment: Adjustment of catapult Bucky middle position
- Acknowledge the position of the Bucky that is set with "OK".

Adjustment of the Stand - Table Middle 3

• Move the ceiling stand into the longitudinal and transverse stops.
• The LED´s in the operating keys are lit, i.e. the ceiling stand is located in the centered
position to the middle of the cassette (check using the line light localizer!)
• To do this, select the following routine per the service software
- Function groups: Stand
- Adjustment: Adjustment of stand - table middle (longitudinal/transverse)
- Carry out the adjustment of the stand - table middle per the service software.
1. Confirm the mask with "OK" if the longitudinal/transverse potentiometers are
adjusted
2. Confirm the mask "Enter" after carrying out the steps.

Siemens AG RXB1-140.071.01 Page 15 of 26 MULTIX PRO

Medical Solutions Rev. 04 07.01 TD SD 21 Service
3 - 16 Table
Even mechanical movement of the tomo figure and the accuracy of the tomo height dis-
play is checked based on the quality of the blur and resolution of tomo exposures of a
tomo test phantom. All tomo figures are checked.

Requirements for this:

- 1 tomo block 44 06 054 RV090
- 1 Cu filter set 44 06 120 RV090
- 1 pin-hole diaphragm 72 52 067 G2080

Test Conditions 3

• Free adjustment data so that an optical density that can be evaluated well is achieved.
• Small focus and fine-resolution screen.
• Tomo height approx. 115 mm (depending on the tomo test phantom).
• Make an exposure for each: 40°; 2 sec and 20°; 0.6 sec.
• Compare the exposure quality by comparing the tomo exposures with the "Bucky
exposure" made under the same conditions.

Brief Description of the Test 3

• Move the unit into the tomo position, center the tomo block in the beam path and
collimate to the tomo block.
• Measure the notch height of the lead strip tests and record the results, set the tomo
height to the measured value.
• Trigger the tomo exposures and develop the film (18cm x 24cm format).
• Make a Bucky exposure under the same conditions.
• Evaluate the exposures:
- Accuracy of the tomo height display
- Visual resolution (comparison with the Bucky exposure)
- Form and movement of the tomo figure
- Evenness of the blur

MULTIX PRO RXB1-140.071.01 Page 16 of 26 Siemens AG

Service Rev. 04 07.01 TD SD 21 Medical Solutions
Table 3 - 17

Anode side

20°
2mm
115, ± 1 mm

SHa

Fig. 15

Description of the Tomo Test Phantom 3

The test phantom is comprised of a hard foam block with two slots and two lead strip
tests.
The lead strip tests are inserted into the slots of the hard foam test phantom so that:
- the notches are pointing towards the outside edge
- the lead strip tests do not overlap
- the two notches are positioned exactly at the same height over the tabletop.
The test phantom is positioned on the tabletop so that:
- one line test is on the anode side
- the notch of the other line test is turned towards the tomo height line light localizer.
- one axis of the test phantom is parallel to the longitudinal table axis.
The holes of the line test that are positioned at a 20º oblique angle all have a height differ-
ence of 2 mm to each other. This makes it possible to exactly determine the tom height
that appears on the exposure.

Siemens AG RXB1-140.071.01 Page 17 of 26 MULTIX PRO

Medical Solutions Rev. 04 07.01 TD SD 21 Service
3 - 18 Table
The individual elements of the line test make it possible to make the following statements
about the quality of the tomo device or of the tomo exposure:

Line groups (LG)

- Visual resolution quality
- Continuity of blur
- Selectivity (object size-dependent "tomo thick-
ness")
- Degree of blur (angle, tomo figure)

Holes, Notch
- Tomo height (tomo plane)
- Tomo figure
- Evenness of the tomo movement
(synchronous movement, smoothness of move-
ment)
- Dose distribution over the exposure
- Parallelism of focus and film path

Edge Appearance
- Continuity of blur
(even or uneven tomo movement)

MULTIX PRO RXB1-140.071.01 Page 18 of 26 Siemens AG

Service Rev. 04 07.01 TD SD 21 Medical Solutions
Table 3 - 19

Sequence of the Checks 3

• Select Bucky mode (key)

• Position the stand in the longitudinal and transverse stops; the corresponding LED next
to the key goes on.
• Set the SID to 115 cm or 102 cm.
• Align the catapult Bucky to the collimator using the line light localizer.
• Prepare the tomo test phantom (see Page 6-3) and position it on the tabletop centered to
the light localizer. One line test must be positioned on the anode side, the other must be
pointing towards the tomo height line light localizer.
• Load a 18 cm x 24 cm (8” x 10”) cassette with the high resolution screen (S ≤ 200) with
film and place it in the catapult Bucky.
• Select the small focal spot and insert a 1.2 mm Cu filter into the collimator.
• Trigger a Bucky exposure:
- Exposure data: 81 kV, small focus , 80% power, middle measuring field
1.2 mm Cu prefilter
• A basic density of D = 1...1.4 should result. Depending on the screen type, set different
mAs values.
• If needed, repeat the first exposure with modified exposure data.
• Once again make sure that the notches of the two line tests are at exactly the same
height above the tabletop; exactly measure this dimension (115 mm, ±1mm).
• Select the 40o; 2 sec tomo program. The longitudinal brake is released automatically and
the catapult Bucky automatically centers itself to the central beam.
• Select the tomo height so that the display tomo height corresponds exactly to the
displayed tomo height of the measured ”notch height”.
• Make two 2 tomo exposures: 40°; 2 sec.
20°; 0.6 sec.
- Exposure data:
81 kV and to achieve the same density for the tomo exposure as for the Bucky
exposure, increase the mAs value by one mAs point:
- Label all exposures exactly:
81 KV, mAs, 1.2 mm Cu, SHa = 115 mm, 40o; 2 sec., linear.

Siemens AG RXB1-140.071.01 Page 19 of 26 MULTIX PRO

Medical Solutions Rev. 04 07.01 TD SD 21 Service
3 - 20 Table

Evaluation 3

Accuracy of the Tomo Height Display 3

The sharply focused hole of the focus test is in the tomo plane.
If the hole by the notch appears sharply focused, the numerically selected tomo height
SHa matches the actual tomo height SH; i.e.,. ∆ SHa = 0.
• If there are differences, determine the height difference ∆ SHa in mm between the
sharply focused hole and notch; there is a height difference of 2 mm from hole to hole.
If the actual tomo height is above the notch, ∆ SHa is positive.
If the actual tomo height is below the notch, ∆ SHa is negative.

Determine the actual tomo height. SH = SHa + ∆SHa

• Calculate the difference in height ∆SHL between the actual tomo height and the line light
localizer: ∆SHL = SHL - SH

The differences ∆SHa and SHL must be ≤ 5 mm.

Adjustment of the Tomo Height 3

The tomo height can be corrected using the S1 Dip switch on the D50 host board accord-
ing to the following table.

S1
8 Sign in front for tomo height correction: ON=positive / OFF=negative
7 23 on on on on on on on on off off off off off off off off

6 22 on on on on off off off off on on on on off off off off

5 21 on on off off on on off off on on off off on on off off

4 20 on off on off on off on off on off on off on off on off

3 n.a. 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 mm

2 TOP Vertix: ON=longitudinal / OFF=transverse (set at the factory)

1 TOP Tomo: ON=toothed belt/OFF=pinion rack (set at the factory)
ON OFF

Optical Resolution Quality 3

The evaluation of the resolution of tomo exposures is made by comparing them with a
Bucky exposure made under comparable conditions. This way, all influences which deter-
mine the resolution of a radiographic exposure (focal point, screen type, film, geometric
conditions, exposure data, etc.) can be ruled out and it is possible to make a clear state-
ment about the quality of the tomo device.
• Determine the maximum optical resolution of the tomo exposures (magnifier min. 6 X).
• Record the Lp/mm which are visible on both line tests in the tomo plane.
• Determine the maximum optical resolution of the Bucky exposure.
The difference between the maximum optical resolution of the Bucky exposure and the
resolution of the tomo exposures may not be more than one line group. The resolution for

MULTIX PRO RXB1-140.071.01 Page 20 of 26 Siemens AG

Service Rev. 04 07.01 TD SD 21 Medical Solutions
Table 3 - 21
the Bucky exposure should result in at least 2.8 Lp/mm (depending on the film-screen
system).
If there is more than one line group difference, there are intolerable movement problems
in the tomo device; it is no longer possible to speak about even movement of the tomo
device.
The resolution of the tomo exposures must be at least 2 Lp/mm.

NOTICE if the difference in parallelism of the table-stand is more than 3

mm over the complete table length, the focus will be affected!

• The resolution of the tomo exposures must be at least 2 Lp/mm.

Tomo Figure and Even Movement of the Tomo Device 3

With a linear layer, the blur lines of the holes to the left and right of the notch must be par-
allel; if they are not, the focus and film paths are not parallel. This also results in reduced
resolution in the line test longitudinal to the tomo device.
If the blur patterns of the holes are wavy (jumpy, snake-like), there are unsynchronous
oscillations in the tomo system (loose or sticking locations, etc.). This also results in the
reduced resolution.
The blur patterns of the holes should have about the same density along the entire length.
If there are dotted blur patterns there is jumpy tomo movement (usually the catapult
Bucky). If there is a continuous density change of the blur patterns, there is changing
movement speed or changing dose rate.
Jumpy tomo movement can also be recognized because edges of the line test plates do
not have a continuous change in density but are in "steps".

Siemens AG RXB1-140.071.01 Page 21 of 26 MULTIX PRO

Medical Solutions Rev. 04 07.01 TD SD 21 Service
3 - 22 Table

Overall Evaluation of the Tomo Device 3

Form and Movement of the Tomo Figure 3

The blur patters of the holes of the line tests show the form and movement of the tomo fig-
ure. If this is not sufficient in a single case for evaluation, a pin-hole exposure should also
be made for the particular tomo figure..
good Linear layer

The blur patterns of the holes are straight and

are parallel on both sides of the notch.

satisfactory
Linear layer

The blur patterns are slightly unparallel or

slightly curved.

unsatisfactory Linear layer

The blur patterns are unparallel or sharply

curved and/or sharply wavy.
The parallelism of the table - stand must be
improved.

NOTICE If the linear layer is poor, check the accuracy of the column move-
ment and, if necessary, carry out an adjustment of the guide rail
as described in Chapter 2.

MULTIX PRO RXB1-140.071.01 Page 22 of 26 Siemens AG

Service Rev. 04 07.01 TD SD 21 Medical Solutions
Table 3 - 23
Evenness of the Blur 3

good The blur patterns of the holes and edges are

continuous dots or stepping are not visible or
scarcely visible.

satisfactory

The blur patterns have several (4 and more)

slightly defined dots or stepping.

unsatisfactory

The blur patterns have few (2 to 3) defined

dots or stepping so that the "tomo exposure"
is practically comprised of just 2 to 3 oblique
exposures made from different beam angles.

Siemens AG RXB1-140.071.01 Page 23 of 26 MULTIX PRO

Medical Solutions Rev. 04 07.01 TD SD 21 Service
3 - 24 Table
Tomo Symmetry 3

Preparing a pin-hole exposure

• The pin-hole collimator exposure of a tomo figure is necessary only in doubtful cases.
• Set the tomo height to 125 mm (middle tomo height).
• Center the pin-hole collimator on the tabletop centered in the beam path. Set the light
field approx. 2 - 3 cm smaller than the pin-hole collimator. Insert a 18 x 24 cassette into
the catapult Bucky.
• Select the Bucky mode and trigger an exposure (81 KV focus, mAs, film-screen
system S ≤ 200).
• Press the 40°, 2 sec tomo key and trigger the exposure.
• Pull out the cassette tray to the stop and reinsert it.
• Press the 20°, 0.6 sec tomo key and trigger a 2nd exposure.
• Develop the film.
Evaluating the tomo exposures:

20o, 0.6 sec

40o, 2 sec

The tomo exposures should be as symmetrical as possible to the point of the Bucky expo-
sure.
• For corrections, select the following routine per the SSW:
Function groups: Host table
Adjustments: Adjustment of the tomo mode lead time ( tomo time 0.4 sec)
Adjustment of the lead time, tomo mode 1 ( tomo time 0.6 sec)
Adjustment of the lead time, tomo mode 2 ( tomo time 0.8 sec)
Adjustment of the lead time, tomo mode 3 ( tomo time 1.2 sec)
Adjustment of the lead time, tomo mode 4 ( tomo time 2.0 sec)

HINWEIS Werkseinstellung:
Vorhaltezeit (Default) ist 90 ms für POLYDOROS SX/LX/Lite.
Wird die Anlage mit einem POLYDOROS IT geliefert ist dieser
Wert (als Ausgangsbasis ) auf 0 ms zu ändern.
Sind Schichtaufnahmen unsymmetrisch können diese durch Kor-
rekturen verbessert werden.

MULTIX PRO RXB1-140.071.01 Page 24 of 26 Siemens AG

Service Rev. 04 07.01 TD SD 21 Medical Solutions
Table 3 - 25

Fig. 16

Adjusting the Tomo Height Light Localizer (Option with Tomo

Versions) 3

• Determine the difference between the laser mark versus the display on the support arm;
to do this, use for example the tomo block.
• To make the correction, remove the front mirror; to do this, remove the 4 mounting
screws on the back of the tomo height light localizer.
• Move the S1 switch (1/Fig. 16) in the direction of the difference determined; to do this,
loosen the 2 mounting screws approx. one half turn.
• Carefully retighten the mounting screws (M2 thread!!)
• Check the adjustment; to do this, briefly switch off the tomo height light localizer
(disconnect the connector).
• Reinstall the front mirror.

Siemens AG RXB1-140.071.01 Page 25 of 26 MULTIX PRO

Medical Solutions Rev. 04 07.01 TD SD 21 Service
3 - 26 Table
This page intentionally left blank.

MULTIX PRO RXB1-140.071.01 Page 26 of 26 Siemens AG

Service Rev. 04 07.01 TD SD 21 Medical Solutions
VERTIX PRO/TOP 4 4-1

Fig. 1

R1 Potentiometer (only VERTIX TOP) 4

• Remove the cover panel (1/Fig. 1) by removing the two screws (2/Fig. 1).
• The R1 potentiometer is located at the back of the vertical carriage (7/Fig.2).
• The vertical carriage on the Bucky wall stand must be in the reference position. To do
this, move the vertical carriage to the top stop (if the R1 potentiometer is defective, it
must be replaced in this position).
• To do this, select the following routine per the service software:
- Adjustment – Calibration
- Function group: Bucky wall stand
- Adjustment: Adjustment of the Bucky W.S. height potentiometer
• Disengage the potentiometer shaft from the toothed belt pinion by loosening the set
screw on the pinion.
• Set a zero adjustment by turning the potentiometer shaft.
• When the value is within tolerance (+/- 2), a signal sounds on the Service PC.

Siemens AG RXB1-140.071.01 Page 1 of 14 MULTIX PRO

Medical Solutions Rev. 04 07.01 TD SD 21 Service
4-2 VERTIX PRO/TOP

2
3
4 1

7
6

Fig. 2

Adjusting the Stop for the 0° Bucky Position (only VERTIX TOP) 4

• Move the Bucky into the 0o position.

• Check the position by placing a spirit level on the front panel.
• To make the correction, move the Bucky into the 90o position and remove the cover
panel (1/Fig.1).
• The position of the Bucky can be changed by turning the stop disk (1/Fig.2). To do this,
slightly loosen the clamping screw (2/Fig.2) and turn the stop disk accordingly. Check
the position by placing a spirit level on the unit.
• Tighten the clamping screw (2/Fig.2) and check the adjusted position in the 0o position. If
needed, repeat the adjustments.

Adjusting the S3 / S2 Switches for the 0° / 90° Bucky Positions 4

• Check the play in the S2 0o position and of the S3 90o position switches in the stop
positions.
• The particular switch must positively actuate in the particular position.
• An adjustment of the switch-point is possible by bending the switch strike levers
(3/Fig.2).

Catapult Bucky 0°/ 90° tilt brake 4

• The response threshold of the tilt brake is adjusted by adjusting the tension of the
Bowden cable using the adjustment screw (5/Fig.2).

MULTIX PRO RXB1-140.071.01 Page 2 of 14 Siemens AG

Service Rev. 04 07.01 TD SD 21 Medical Solutions
VERTIX PRO/TOP 4-3

2
1

Fig. 3

Vertical Stand Carriage Brakes 4

• Remove the middle cover panel on the stand column.

Access to the brakes in the:

• VERTIX TOP: open the cover panel on the vertical carriage.
• VERTIX PRO: remove the Bucky from the vertical carriage.
Prior to removing the Bucky, appropriately secure the vertical carriage because one the
Bucky is removed, weight compensation is no longer assured.

Replacing the Vertical Brake, cmpl. 4

• To replace the complete vertical brake (1/Fig. 3), the vertical carriage must be moved up
and out of the column stand.

Replacing the Brake Cable 4

• Release the brake and while in this condition, secure it with cable ties (2/Fig. 3).
• Caution: the brake no longer works; secure the vertical carriage!
• Open the cable clamp (3/Fig. 3) on the brake lever and replace the cable.

Siemens AG RXB1-140.071.01 Page 3 of 14 MULTIX PRO

Medical Solutions Rev. 04 07.01 TD SD 21 Service
4-4 VERTIX PRO/TOP

1 2

Fig. 4 Fig. 5

Adjusting the Vertical Brake 4

• Turn the set screw (1/Fig. 4) so that the brake just begins to brake, then turn the set
screw approx. 3/4 to one turn to the left (counterclockwise).
• The braking force should correspond to approx. 250-300 N.
• Counter the position of the set screw using a hex nut (1/Fig. 5); for this, use a 10’ open-
end wrench as shown in (2/Fig. 4).

MULTIX PRO RXB1-140.071.01 Page 4 of 14 Siemens AG

Service Rev. 04 07.01 TD SD 21 Medical Solutions
VERTIX PRO/TOP 4-5

Fig. 6 Fig. 7

VERTIX TOP Weight Compensation 4

• Depending on the accessories used, it is necessary to adjust the weight compensation of

the vertical carriage.
• Prior to making the adjustment, install all cover panels on the vertical carriage, install the
accessories normally used and insert a standard cassette.
• Measure the movement forces with the brake released.
• If needed, fine compensation weights (1/Fig. 7) of 1 kg each can be added or removed.
• Remove the cover panel (1/Fig. 6) by removing the two screws (2/Fig. 6).
• Insert fine compensation weights (1/Fig. 7) as illustrated and press them against the wall
using the self-adhesive surface (number of pieces as needed).
• Reinstall the cover panel.

Siemens AG RXB1-140.071.01 Page 5 of 14 MULTIX PRO

Medical Solutions Rev. 04 07.01 TD SD 21 Service
4-6 VERTIX PRO/TOP

1 2

Fig. 8 Fig. 9

VERTIX PRO Weight Compensation 4

• Depending on the accessories being used, an adjustment of the weight compensation of

the vertical carriage is necessary.
• Prior to the adjustment, all cover panels on the vertical carriage must be installed, the
accessories normally used must be attached and a standard cassette should be
inserted.
• With the brake released, measure and make a note of the movement forces.
• If necessary, fine compensation weights (1/Fig. 8) of 1 kg each can be added or
removed. To do this, it is necessary to remove the catapult Bucky.

NOTICE For the following disassembly of the Bucky, weight compensa-

tion is no longer assured. When the lift brake is released, secure
the vertical carriage against flying up!

• Take out the cassette panel and grid.

• Remove the bottom panel (1/Fig. 9). To do this, remove the bottom mounting screws
(2/Fig. 9) through the two openings using a 3 mm Allen key.

MULTIX PRO RXB1-140.071.01 Page 6 of 14 Siemens AG

Service Rev. 04 07.01 TD SD 21 Medical Solutions
VERTIX PRO/TOP 4-7

1 2

Fig. 10 Fig. 11

• Use a pencil to mark the position of the front panel (to make it easier to center it when it is
installed later).
• Remove the bottom mounting screws on the front panel (1/Fig. 10) and remove the
toothed washers.
• Remove the top mounting screws on the front panel (1/Fig. 11) and take off the front
panel.

Siemens AG RXB1-140.071.01 Page 7 of 14 MULTIX PRO

Medical Solutions Rev. 04 07.01 TD SD 21 Service
4-8 VERTIX PRO/TOP

1 2

Fig. 12

• Remove the hex screw (2/Fig. 12) a remove the side cover panel (1/Fig. 12).
• Remove the cover panel (4/Fig. 12). To do this, remove the 4 screws (3/Fig. 12).
• For the following work steps, a 2nd person will be needed for a brief while or a suitable
object (chair, step stool) must be positioned in front of the VERTIX.
• Secure the Bucky against falling and remove the mounting screws (2/Fig.12).
• Remove the Bucky and hold it or place it down on the object placed in front of it.
• Add or remove additional weights (1/Fig. 8) in accordance with the previously
determined forces. To do this, loosen the bracket (2/Fig. 8) and add or remove weight(s).
• Reinstall the Bucky in the reverse order of the above instructions.
• When installing the front panel, align it with the marks.
• Check the function of the stop movements and pay special attention to sufficient spacing
between the grid and the front panel.

MULTIX PRO RXB1-140.071.01 Page 8 of 14 Siemens AG

Service Rev. 04 07.01 TD SD 21 Medical Solutions
VERTIX PRO/TOP 4-9

Fig. 13

Replacing the Support Cable 4

• The support cable must be replaced after 3 years operating time or when:
12 or more broken single strands of the cable over 100 mm can be found, or 3 or more
broken single strands of the cable can be found over 10 mm.
• Even if only one single strand is broken, the operator must be informed that continued
use of the VERTIX poses a safety risk to patient and operator. The VERTIX may not be
used until the defective cable has been replaced.
• In both versions, the Vertix may not be removed to replace the cable.
- With the VERTIX PRO, the catapult Bucky and the support plate must be remove to
replace the cable.
- With the VERTIX TOP, the cable clamp is accessible when the catapult Bucky is tilted
into the horizontal position and the cover panel on the support plate is removed.
• Remove the cover panels on the VERTIX. Move the counterweight until the threaded
hole in the counterweight is lined up with the hole in the VERTIX (see also the Installation
Instructions). Secure the counterweight with an M12 screw and appropriate U-washer.
• Raise the catapult Bucky so that the load is released on the cable, and with the catapult
Bucky in this position, place a wooden block or a similar object under it to support it.
• Loosen the cable at the Bucky support. Loosen the components (Fig. 13) in the
sequence listed and pull up the mount with the cable pulley. The cable mount on the
counterweight will now be accessible.
• Remove the cable from the counterweight and replace it.
• Reinstall the mount with the cable pulley. Secure the cable on the Bucky support (make
sure that the U-plates, the snap ring on the two mounting points and the cable securing
device are reinstalled correctly).
• Remove the wooden block and remove the safety screw from the counterweight.
• Check for easy function and reinstall the cover panels.

Siemens AG RXB1-140.071.01 Page 9 of 14 MULTIX PRO

Medical Solutions Rev. 04 07.01 TD SD 21 Service
4 - 10 VERTIX PRO/TOP

Bucky 4

General Adjustments 4

Wiring Diagram G051G is the reference document for the configuration of Dip switches
and jumpers:

Jumper X4.1-2 "END NOTE" must be set if the Bucky is installed in the VERTIX.
Jumper X4.2-3 "NO END NOTE" must be set if the Bucky is installed in the MULTIX.

S3 DIP switch:
S3.1 = OFF i.e. Automatic mode: the setting the for the grid advance time is made
in the service software. This setting must also be set for manual
MULTIX versions because here, too, the advance time is set in the
service software.

S3.2 = OFF If grid type 12/40 is used

(high speed = installation in the MULTIX)

ON If grid type 17/70 is used

(slow speed = installation in the VERTIX)

NOTICE Allocation of the grid speed to the type of grid being used is basic
for quality exposures.
If the type of grid is changed (even later), a change of the grid
speed is absolutely necessary.

S3.3 = ON i.e. the transfer rate must be set to 100kBaud

S3.4 = OFF Plane A means the Bucky is installed in the MULTIX

ON Plane B means the Bucky is installed in the VERTIX

S3.5 ON Mixed mode (inch/cm cassettes) permitted
OFF Mixed mode not permitted

MANUAL MODE programming is not relevant in this system. Programming in this system
is always made in the service software.

HINWEIS Die Zuordnung der Rastergeschwindigkeit zum verwendeten

Rastertyp ist grundlegend für auswertbare Aufnahmen.
Bei einem (auch späterem) Wechsel des Rastertyps ist die
Änderung der Rastergeschwindikeit unbedingt erforderlich

MULTIX PRO RXB1-140.071.01 Page 10 of 14 Siemens AG

Service Rev. 04 07.01 TD SD 21 Medical Solutions
VERTIX PRO/TOP 4 - 11
Grid Blur 4

A check must be carried out for every application unit with a moveable grid to determine at
which exposure time tg grid stripes can no longer be seen on the film.

NOTICE Factory setting:

The delay time (default) is 34 ms for POLYDOROS SX/LX/Lite
If the system is shipped with a POLYDOROS IT, this value (as an
initial basis) must be changed to 0 ms.

Procedure:
• At the generator, select small focus, 80%, 40 kV and middle IONTOMAT chamber.
• Set a SID of 115 cm.
• Insert a 18 x 24 cm cassette without film.
• Trigger exposure beginning with 40 kV until exposure times of approx. 3 ms are obtained
(increasing the kV value -> exposure time becomes briefer).
• Insert a 18 x 24 cm cassette with film.
• Trigger the exposure with the previously determined kV value.
• Using a magnifier at the light box, determine at which switch time the grid stripes can no
longer be seen on the film.
• If the grid advance time needs to be changed, carry out the test setup and the
measurement as shown in Fig. 14. The generator delay time can be changed using the
Service PC as described in the chapter “Programming the System”.
- Grid stripes with exposure times of ≥ 3 ms are inadmissible.

Siemens AG RXB1-140.071.01 Page 11 of 14 MULTIX PRO

Medical Solutions Rev. 04 07.01 TD SD 21 Service
4 - 12 VERTIX PRO/TOP
Grid Drive 4

The advance time is set at the factory to a value of 34 ms.

NOTICE The check of the advance time entered is performed during

"Checking the Grid Blur".

The relationship between advance time and grid movement, and thus the problem of grid
stripes is illustrated in the following graphic.

Exposure!
The programmed generator delay
time corresponds to the actual measured
Grid path delay time of the generator being used

Turning point

34 ms

MIddle position

Grid start

Park position

t
Delay time in the SSW 180 ms 90 ms 0 ms

Channel 1 Channel 2

Radiation enable
Generator delay time

U1 measured

HW signal
radiation enable Physical occurrence of
radiation

Channel 1: Test points on backplane D54 X109 (U1) and X110 (ground)
Channel 2: Measure radiation using measuring chamber, Part No.: 96 60 754 RE999.

Fig. 14

Top diagram (Fig. 14): temporal progression of grid movement with the time point at which
radiation is triggered.
Bottom diagram (Fig. 14): enable signal relative to grid movement.

MULTIX PRO RXB1-140.071.01 Page 12 of 14 Siemens AG

Service Rev. 04 07.01 TD SD 21 Medical Solutions
VERTIX PRO/TOP 4 - 13

NOTICE The programmed advance time applies for both Buckys

contained in the system. If different grid types are used and thus
different grid speeds, optimization of the advance time may be
called for.

Example:
Very brief exposure times and slow grid speed (grid type 17/70) require reducing the
advance time to almost 0 ms to place this grid focused to the film.

The advance time can be entered using the Service PC.

To do this, select the following routine per the service software:
- Adjustment-Calibration
- Function groups: Host Table
- Adjustment of Bucky lead time

Siemens AG RXB1-140.071.01 Page 13 of 14 MULTIX PRO

Medical Solutions Rev. 04 07.01 TD SD 21 Service
4 - 14 VERTIX PRO/TOP
This page intentionally left blank.

MULTIX PRO RXB1-140.071.01 Page 14 of 14 Siemens AG

Service Rev. 04 07.01 TD SD 21 Medical Solutions
Changes to Previous Version 5 5-1
Cover page:
Changed.
Chapter 1; Page 2:
Table corrected.
Chapter 2; Pages 6, 15, 17 and 28-30:
Description rewritten.
Adjustment of the focus-near plates changed.
Text rewritten.
Replacing the support cable added.
Chapter 2; Pages 20-23:
Check of the lamp voltage in the collimator and adjustment of the laser light localizer
added.
Chapter 3; Pages 5, 6, 7, 9, 10, 24:
Notice added.
Chapter 4; Pages 3 and 4 / 9,10, 11:
Vertical brake added.
Replacing the support cable and notice added.

Siemens AG RXB1-140.071.01 Page 1 of 2 MULTIX PRO

Medical Solutions Rev. 04 07.01 TD SD 21 Service
5-2 Changes to Previous Version

TD PS 21 / Conrad/Tropia

MULTIX PRO RXB1-140.071.01 Page 2 of 2 Siemens AG

Service Rev. 04 07.01 TD SD 21 Medical Solutions