SERVICE MANUAL

BLOOD COLLECTION MIXER

Model CM745

Centron Corporation
 SERVICE MANUAL

BLOOD COLLECTION MIXER

Model CM745

No. CAT.CM745SM1.6Ee
ISSUE 7 AUG 2015

Centron Corporation
44 Beolmal-ro, Dongan-gu, Anyang
Gyeonggi-do, 431-804 Korea
Tel.: +82-31.422.7890
Fax : +82-31.422.7866
www.centrons.com
 Table of Contents
-------------------------------------------------------------------------------------------------------------
Page
Table of Contents i
List of Figures ii
Safety Symbols iii
Notice iii
Important Notes iv
1. Introduction 1-1
1-1. General 1-1
1-2. Features 1-2
1-3. Accessories 1-3
1-4. Specifications 1-4
2. Appearance and Functions 2-1
2-1. Front View 2-1
2-2. Rear View 2-2
2-3. Control Panel 2-3
2-4. LCD Display Panel 2-4
2-5. Tube Clamp Module Assembly 2-4

3. System Descriptions 3-1

3-1. General 3-1
3-2. CPU Board 3-2
3-3. Power Board 3-4
3-4. Hall Sensor Board 3-5
3-5. Load Cell 3-5
3-6. Tray Rocking Mechanism 3-5
3-7. Battery and Battery Charging 3-5
4. Standard Operating Procedures 4-1
4-1. Starting Up 4-1
4-2. Blood Collection Procedures 4-2
4-3. Alarms 4-5
4-4. Setting-up Parameters 4-6
4-5. Weight Calibration 4-7
4-6. Battery Recharging 4-8
4-7. Moving Clamp Module Assembly 4-9

i
 Page
5. Checks and Adjustments 5-1
5-1. Test Mode Subroutines 5-2
5-2. Tray Leveling 5-3
5-3. Weight Calibration 5-4

6. Troubleshooting 6-1
6-1. Precautions 6-1
6-2. Test Equipment 6-1
6-3. Preparation 6-1
6-4. Troubleshooting Procedures 6-2

7. Schematic Diagrams 7-1

8. Technical Illustrations 8-1
9. Parts List 9-1

List of Figures
Page
[Figure 2-1] Front View 2-1
[Figure 2-2] Rear View 2-2
[Figure 2-3] Control Panel 2-3
[Figure 2-4] Display Panel 2-4
[Figure 2-5] Tube Clamp Module 2-4
[Figure 3-1] CPU Board Functional Block Diagram 3-2
[Figure 3-2] Power Board Functional Block Diagram 3-4
[Figure 4-1] Battery Recharging 4-8
[Figure 4-2] Moving Clamp Module Assembly 4-9
[Figure 6-1] Troubleshooting Flow Charts 6-3
[Figure 7-1] System Wiring Diagram 7-2
[Figure 8-1] Exploded View of CM745 8-2
[Figure 8-2] CPU Board Layout 8-3
[Figure 8-3] Power Board Layout 8-4
[Figure 8-4] LCD Backlight Board Layout 8-5
[Figure 8-5] Battery Contact Board Layout 8-5
[Figure 8-6] Battery Terminal Board Layout 8-6
[Figure 8-7] Hall Sensor Board Layout 8-6

ii
 Safety Symbols

WARNING
indicates that inappropriate use of device might result serious injury to users and
damage to the device. Users must follow the procedures as specified in this manual.

CAUTION
indicates the presence of hazard that could result in minor injury or property damage
if ignored.

NOTE
describes information for the installation, operation, or maintenance which is
important for proper use.

Notice

Potential electromagnetic interference may expect an adverse influence

on functioning of other devices being operated together in the same
environment. Any device not in compliance with EMC requirements
WARNING should not be used together in the same environment.

This equipment has been tested and found to comply with the limits of EMC
requirements in EN61326-1:2006. These limits are designed to provide
reasonable protection against harmful interference from adjacent devices.

Do not put excessive weight on the tray or push the tray downward in a
forceful manner. (This avoids damage to the weight-sensitive device
CAUTION under the tray.) Do not place weights over 2 kg (4.4 lbs) on the tray.

Risk of explosion if battery pack is replaced by an incorrect type.

Dispose of used batteries according to the instructions.
CAUTION

iii
 Important Notes

Power Source
The device operates on either a battery pack or an AC power adapter, or both.
Battery Capacity
Turn power off to save the battery when the device is not to be used for hours. Device
power will turn off automatically if no control key has been touched for 30 minutes.
The device runs longer than 15 hours continuously with a fully charged battery pack.
Full charging may take 4 hours.

Battery Recharging
 Recharge the battery pack prior to the first use. To recharge the battery pack, insert it in
the device and plug the AC power adapter in the jack on the rear side.
 The battery pack, although it is rechargeable, is a consumable item. Replace the pack with
a new one when it seems the pack may have been degraded too much.

Backup Battery
 This device is equipped with a backup battery to prevent any data loss in case of
accidental black out or battery discharge during blood collection. The built-in battery will
keep the data in process for 20 minutes.
 Do not keep operating the device only with the backup battery.

Cleaning and Maintenance

 Use a soft cloth and mild detergent to clean the device. Do not use paint thinner,
benzene, solvent or strong detergent.
 Be sure to turn the power key off before cleaning the device.
 Only authorized service personnel should remove the covers of the unit.

Storage
 Avoid leaving the device in a location where temperature is higher than 40 C (104 F).
 If the equipment is not to be used for a long time, it is recommended to protect it from
dust, dirt or humidity.
 Keep it away from any heating source, direct sunlight, water vapor, or such
environment as poor ventilation, excessive shock or vibration.

Environmental Conditions for transport and storage

 During transportation equipment should be free from any shock, vibration, heat or wet
condition.
 Packing box should be handled not to be broken and upside down at any time.
 Environmental conditions for transportation and storage should be kept as follows.
1. Temperature: 20 ~ 70 oC (4 ~ 158 oF)
2. Relative humidity: 10 ~ 100%
3. Air pressure: 50 ~ 106 kPa

iv
1. Introduction

1-1. General

This Service Manual describes technical information of the Blood Collection Mixer
CM745 to aid service and maintenance of the equipment.

The manual contains ;

1. Introduction
2. Appearance and Functions
3. System Descriptions
4. Standard Operating Procedures
5. Checks and Adjustments
6. Troubleshooting
7. Schematic Diagrams
8. Technical Illustrations
9. Parts List

Blood Collection Mixer CM745 is a precision electronic equipment, based on micro-

processors, integrated circuits, a load cell, two geared motors and a LCD display panel.
The equipment should be serviced by authorized service personnel.

1-1
1-2. Features

The Blood Collection Mixer CM745 provides;

a. monitoring blood collection processes
b. mixing collected blood with anticoagulant in the blood bags
c. label checking function is available as an option

CM745 is a compact and easy-to-use device, equipped with convenient features as;
(1) Clear LCD display and LED indicators provide various operational information.
(2) The device is so flexible that users can adjust operational parameters as;
- collection target volume
- criteria on which alarms are triggered
- on/off of beep sounding
- tray rocking speed
- simple weight calibration in digital method
(3) Various audible and visual alarms work.
(4) It operates on dual power sources - the AC power adapter and the battery pack. A
large capacity Li-ion rechargeable battery pack lasting 15 hours is provided as an
option for outdoor use.
(5) Onboard battery(rechargeable) is built in for emergency power backup. It supplies
power for 20 more minutes to safely complete ongoing collection.
(6) Tube clamp module can be installed either at left side or at right side.
(7) A deeper tray may be selected as an option.
(8) A barcode scanner may be opted for label checking, which reads most barcodes
including ISBT128 and Codabar codes.
(9) The device and accessories can be stored and moved in a canvas carrying bag or
a carrying case if it is separately purchased.

1-2
1-3. Accessories
A standard set of CM745 package consists of the following;

CM745 Main Unit Power Adapter & Cord User’s Manual

(for 100-120 or 220-240V use)

The items below are not included in the standard set of CM745, but are available under
separate orders.

Battery Pack BL101 Battery Charger BC110 Barcode Scanner & Holder

Large Tray 500 gram Weight Sample Tube Holder Kit

Canvas Carrying Bag Carrying Case

1-3
1-4. Specifications

(1) Collection volume display : 0 ~ 999 ml, in 1 ml step

(2) Total weight display : 0 ~ 1,500 gram, in 1 gram step
(3) Elapsed time display : 00:00 ~ 19:59 min/sec
(4) Target volume set : 0~4 figures, adjustable between 10 ~ 600 ml, in 5 ml step
(5) Default value of target volume: 350/400/450/500(first call at PRESET key pressed: 450)
(6) Tolerance:
a. Blood volume display : not greater than 3 ml
b. Total weight display : not greater than 4 gram
(7) Control keys:
[POWERCAL], [PRESET], [5 ml ▲], [5 ml ▼], [TIMEBEEP], [CLAMP], [START], [END]
(8) Indication panel : custom-designed composite LCD display
(9) Visual indicator lamps:
a. POWER lamp [ ] turns on when the [POWERCAL] button is pressed.
b. CLAMP lamp [ ] turns on when the clamp is closed, and turns off when the clamp is open.
(10) Audible and visual alarms:
a. End collection alarm : when a collection procedure is properly completed.
b. Low flow alarm : when blood flow rate is lower than 30 ml/min.
c. High flow alarm : when blood flow rate is higher than 150 ml/min
d. 10 minute alarm : when 10 minutes have elapsed from collection start
e. 20 minute alarm : when 20 minutes have elapsed from collection start.
f. Low battery alarm : when battery voltage is low.
g. Tray off alarm : when tray is taken off .
(11) Specific gravity of blood : 1.057 (ml-gram)
(12) Tray rocking speed : selectable among 15/20/30/40/45 RPM (default: 30 RPM)
(13) Recognizable barcodes : ISBT128, Codabar, EAN, UPC, Code 128, Code 39, etc.
(14) Power source : AC power adapter or battery pack
(1) AC power adapter: Input 100~240 VAC, 50/60 Hz, 1.0A. Output 18 VDC,
1.67 A, 30 W, Model BPM030S18F02, Bridge Power /Ault Corp.
(2) Battery: 10.8V/5.2 AH, Li-ion cells, rechargeable and replaceable pack
(3) Use a grounded 3-prong power cord.
(15) Dimension: L 28.9x W 19.0xH 15.7 cm(L 11.4" x W 7.5" x H 6.2")
(16) Weight: equipment with battery – 2.2 kg (4.9 lbs)
(17) Environmental conditions:
The device should be operated within the following environmental conditions;
(1) Indoor use only
(2) Altitude up to 4,000 meters
(3) Operating temp.: 0~40 C (32~104 F) Storage temp.: -20~70 C (-4~158 F)
(4) Maximum relative humidity 80 % for temperature up to 31C, decreasing linearly
to 50 % relative humidity at 40 C
(5) Mains supply voltage fluctuations up to +/- 10 % of nominal voltage

1-4
2. Appearance and Functions

2-1. Front View

[Figure 2-1] Front View

(1) tray(detachable) - is plastic molded on which blood collection bags are loaded. Tray
should be detached when mixer is stored in the carrying/transportation bag.
(2) sample tube holder – holds samples tubes.
(3) power indication lamp – is lit when power is turned on.
(4) POWER switch - turns the power on and off.
(5) control panel – various controls buttons are located.
(6) LCD display panel - is a custom-designed display panel on which all information is
shown.
(7) target preset – displays preset target volume.
(8) tube clamp module(movable) – crimps blood bag tubing to block blood flowing into
blood bag. It can be affixed to the other side.

2-1
2-2. Rear View

[Figure 2-2] Rear View

(1) tube clamp module(movable)- crimps blood bag tubing to block blood flowing into
blood bag. It can be affixed to the other side.
(2) barcode scanner connector – is the connecting port of the barcode scanner to the main
unit. It is also used to download an operating software from a PC.
(3) power adapter jack - takes power directly from the AC power adapter. When the
adapter is plugged in, it supplies power to the equipment and the battery pack will be
recharged.
(4) sample tube holder - holds samples tubes.
(5) tray leveling screw - is used to level the position of the tray.
(6) tray(detachable) - is plastic molded on which blood collection bags are loaded. Tray
should be detached when mixer is stored in the carrying/transportation bag.

2-2
2-3. Control Panel

[Figure 2-3] Control Panel

(1) START indicator lamp – It is lit in green color when power is turned on, but it will
be changed to yellow color when alarm is enabled. It also indicates in amber color when
battery is charging in case that device is powered off.
(2) [5 ml ▲] - increases target collection volume by 5 ml increment.
(3) [POWERCAL] - dual function key:
 Short press (a click for 1 second)- turns device power on or off.
 Short press during booting period of 10 seconds - calibration procedure starts.
(*) Remark:
If the key is pressed during a collection cycle, power does not turn off , but a
warning alarm (Wrong key alarm: 3 short beeps) sounds. This is a measure not to
make the device turned off by an unintentional or accidental press during a collection
cycle.
If the key is pressed and held for 10 seconds continuously, device power does turn
off regardless of the procedure. This is a measure to make the device turned off
during a collection cycle, in case that user wants to stop a collection before
completion.
(4) [PRESET] - displays preset target collection volumes.
(5) [5 ml ▼] - decreases target collection volume by 5 ml increments.
(6) Display panel - displays weight, volume, elapsed time and operation symbols.
(7) CLAMP lamp [ ] - turns on in amber color when the tube clamp is closed.
(8) [CLAMP] - opens or closes clamp.
(9) [END] – Pressing this key ends the collection procedure.
(10) [START] - starts a blood collection cycle. The collection progress indicator starts
working.
(11) [TIMEBEEP] - dual function key:
 Short press (one click) - displays elapsed time from start (min : sec).
 Long press (hold for 3 seconds) - turns beep sound on or off. When symbol
appears, it is mute and when sound resumes, symbol disappears on the LCD.
(12) Target preset – displays preset target volume.

2-3
2-4. LCD Display Panel

[Figure 2-4] Display Panel

LCD display panel shows operation status and gives data. Display panel shows the
booting step of the device when power is turned on.
(1) Main display area - displays weight, volume and elapsed time.
(2) [GM] - indicates the displayed weight is in gram.
(3) [ML] - indicates the displayed volume is in milliliter (ml).
(4) [ ] - indicates the audible alarms are muted.
(5) [ ] - indicates collection procedure is in progress. The indicator turns on after
[START] is pressed. Indicator flashes either when the collected volume reaches
target volume, or when a low or high flow alarm is activated.
(6) [LOW] - turns on when battery charge is low (LOW ), or when flow rate is low
(LOW ).
(7) [ ] -  It is flashing while a battery pack is charging.
 It is OFF when battery charging is finished or a battery pack is not installed.
 It is ON when the device is only operated by a battery pack.
 LOW is flashing when the battery charging level is low.
(8) [ALARM] - turns on when any alarm is activated.
(9) [PRESET] - Indicator for target collection volume.
It turns on when [PRESET], [5 ml ▲] or [5 ml ▼] key is pressed.
(10) [CAL] - Indicator for calibration mode.

2-5. Tube Clamp Module Assembly

(1) M3 mounting screws (3) Tube clamp module

(2) Bracket, clamp

[Figure 2-5] Tube Clamp Module

2-4
3. System Descriptions

3-1. General

Blood Collection Mixer CM745 consists of a main unit, an AC power adapter, battery
pack (option), a barcode scanner (option), and a canvas carrying bag (option).

Main unit comprises a tube clamp module, six circuit board assemblies, a tray motor
assembly and a load cell. Battery pack is inserted in the compartment at the left side of
the main unit.

AC power adapter is used for both recharging the battery and for supplying power to
the main unit directly.

Major assemblies in the main unit are listed below ;

. CPU Board
. Power Board
. LCD Backlight Board
. Battery Contact Board
. Battery Terminal Board
. Hall Sensor Board

. Tray Rocking Mechanism

. Tube Clamp Module

Following sections describe operation theory and function of each assembly in detail.

3-1
3-2. CPU Board

CPU board assembly comprises memories, a microprocessor and control keys.

[Figure 3-1] represents the functional block diagram of CPU board.

[Figure 3-1] CPU Board Functional Block Diagram

(1) Microprocessor;
Microprocessor U2 is of ATMEL microprocessor. It is the heart of the
equipment, controls all circuits, switches, tray, clamp, displays and alarms.
When power is on, it self-checks and, after 10 seconds, tares the weight of
hardware which are on the tray. Every time it monitors switch actions.
(2) LCD Driver and LCD
It is a LCD with backlight, which displays commands and data received from
microprocessor.
(3) Bar LED
Bar LED indicates the collection progressive status and controlled by CPU.
(4) Control Keys
Commands from the control keys are processed by CPU. Control keys are located
at the Membrane Panel.
(5) Hall Sensor;
Hall sensor data which is used for leveling the tray is fed into CPU.

(6) Tray Motor Driver

Tray motor control signal is received from CPU to control the motor speed by
PWM signal.

3-2
(7) Load Cell Data;
CPU receives the load cell data and converts it into weight data.
(8) Load cell Amplifier and A/D Converter
 Load cell Amplifier
Load cell generates very weak signal that is proportional to weight applied
on it. OP amp stages U6 and U4 amplify the weak signal by 60 dB and feed
it to A/D converter. A potentiometer VR1 adjusts offset voltage, and VR2
adjusts signal gain.
 A/D Converter
A/D converter U7 converts an analog signal to a digital signal.
It communicates with the microprocessor in SPI(Serial Peripheral Interface)
format.
(9) Barcode Data;
CPU receives barcode data from the Power Board. This signal line is also used for
firmware upgrading.
(10) Power on/off control
U3 is a power on and off controller. When power switch signal is received, U3
turns on power via Q2 FET in the Power Board Ass’y. And when POWER_OFF
signal is received from CPU, it turns off power via Q2 FET in the Power Board
Ass’y.
(11) Power
There are four kinds of powers such as 14V, 14.3V, 14.7V and 15V.
 14V : It is the main power which is supplied through Q2 FET when power
switch is turned on.
 14.3V: It is the primitive power for activating the power control circuit which
allows the main power(14V) is feeding to circuits by the power on/off
switch.
 15V: It is used for charging the spare battery.
 14.7V: It is the power for lighting the START indicator lamp when the main
power is turned off.

(12) Clamp Motor;

Clamp motor is controlled by PWR and PWM signals from CPU.
(13) Power/Status LED Control;
START indicator lamp is a dual color LED. It’s color is controlled by CPU such
that it is lit in green when power is turned on, but it will be lit in yellow when
alarm is enabled. It also indicates in amber color when battery is charging in case
that device is powered off.
(14) Spare Battery Charging;
9V spare battery(Ni-MH) is charged by the charging circuit comprising D5, R23
and F1. It supplies power for 30 minutes to the circuit when main power is
accidently turned off.

3-3
3-3. Power Board

Power Board comprises a power control block, a barcode scanner driver and a clamp
motor controller.

[Figure 3-3] represents the functional block diagram of Power Board.

[Figure 3-2] Power Board Functional Block Diagram

(1) Power Control Block

 Battery Charger
U4 is a battery charging control IC. 18 Vd.c. from the AC power adapter is fed
into U9 voltage regulator and its output current is sent to the battery
pack. Meanwhile, U4 battery charging controller monitors the battery conditions
and controls constant current/constant voltage for efficient charging.
 Power ON/OFF Switch
The switch is controlled by the power_con signal from the CPU board.
(2) Barcode Scanner Signal Driver
Low voltage signal is converted to high voltage signal at U5.

(3) Clamp Motor Controller

Clamp motor is rotating by PWM signal to open or close the clamp module. Clamp
power signal(PWR) turns on or off the clamp module to prevent current consumption
while not in motion.

3-4
3-4. Hall Sensor Board
The board has a magnetic sensor called Hall sensor. The component senses magnetic
field and generate a signal. As the tray motor assembly has magnets on its cam
structure, this sensor senses rotation angle of motor shaft and tray position.
So tray motion and position information is checked by the Hall Sensor and fed to
microprocessor.

3-5. Load Cell

Load cell is a weight-sensitive device, the output voltage of which is proportional to the
force onto it. It generates very weak voltage.
In the equipment is used a load cell unit. The signal from load cell is fed to high-gain
amplifiers in CPU Board Assembly.

3-6. Tray Rocking Mechanism

The mechanism consists of a geared motor, a rotation arm, a tray mount and magnets.
A turn of motor shaft makes tray rock a full cycle. Numbers of tray rocking and tray
position are checked by the Hall sensor and fed to microprocessor on CPU Board
Assembly. When tray is biased, it can be corrected by the leveling procedure as it
changes the sensing angle of magnets by Hall sensor on the Hall Sensor Board
Assembly.

3-7. Battery and Battery Charging

(1) Battery Pack
Battery is of Li-ion 10.8 VDC/5.2AH type. It's rechargeable and replaceable.
Battery can be recharged in the equipment.
An electronic fuse (PTC) in the pack protects the battery from short circuit.
A thermistor is also equipped in the pack to control fast recharging when necessary.
(2) AC Power Adapter ;
Output from AC power adapter is good in voltage range of 18 VDC, and current
supplying capability of 1.67 Amp or above. Input voltage and frequency
specification of adapter should mate with the AC mains line voltage.
The AC power adapter is a primary power source for the main unit.
When an AC power adapter is connected at rear panel connector, the battery is
disconnected by internal circuit and the adapter supplies operation power.

3-5
4. Standard Operating Procedures

4-1. Starting Up

(1) Installation
a. Unpack the package and check accessories as in Section 1-3 Accessories.
b. The device can be powered by the AC power adapter or the battery pack, or both.
When the battery pack should be used, recharge it first. Refer to Section 4-6
Battery Recharging.
c. Check mounted position of tube clamp module. Users can move it to the other side.
Refer to Section 4-7.

(2) Initial Operation;

a. When power is turned on first time, the device starts working in factory default
setting, which are;
Parameter Factory default User-adjustable
1 Preset target volume 350/400/450/500 ml YES
2 Default preset figure 450 ml YES
3 Beeping of all alarms ON YES
4 Low Flow alarm limit 30 ml YES
5 High Flow alarm limit 150 ml YES
6 Tray rocking speed 30 RPM YES
7 Specific gravity of blood 1.057 YES
8 T1 time alarm 10 minutes YES
9 T2 time alarm 20 minutes YES

b. Users can change the parameters. Refer to Section 4-4 Setting-up Parameters.
Parameter changes are stored in the device memory, and when power is turned on
again, the device starts working at changed setting.

4-1
4-2. Blood Collection Procedures

(1) Press [POWERCAL] key.

 CM745 turns on.
 The display panel shows all LCD fonts and counts down for
10 seconds, and then displays 0 GM.

(2) To change the target volume preset value, press [PRESET] key.
 A default value(450 ml) will be displayed.
To select other value, just press [PRESET] key. (e.g.)
 Four pre-determined default values will be displayed in turn.
The preset value can be changed by [5 ml ▲] or [5 ml ▼]
key between 10-600 ml range.
 After 5 seconds, a new preset value will be saved and go
back to the previous step.
 A new value will be remained unless power is turned off.

(3) Place the blood bag on the tray. (e.g.)

 Display panel shows the weight of the blood bag.

(e.g.)
(4) If a bag information is read by a barcode scanner, a preset
target volume will be automatically set and displayed for 5
seconds.

(5) Guide segment tubing through the tube clamp.

Adjust tubing so it loops freely. Do not pull tubing too tight.

(6) Press [CLAMP] key.

 Clamp closes and the CLAMP indicator lamp turns on.

(7) Prepare phlebotomy site and perform venipuncture.

(8) Press [START] key.

 A collection cycle begins.
 Clamp opens, and blood starts to flow.
 Collection progress indicator starts to be lit and symbol
appears.
 Bag is tared to "0" ml.

4-2
  REMARK: A collection cycle begins only when the bag
weight is between 26-499 grams. If the key is pressed when
the weight on the tray is either below 26 grams or over 500
grams, an error message ("E r r") is displayed.
The display panel shows the current weight in 3 seconds.
Check the blood bag to adjust what's wrong.
Press [START] key again.
 NOTE: The unit ignores an abrupt change of the weight while
the unit is in a collection cycle. Any weight change of +/ 30
grams or greater in 1 second interval will be ignored so the
display remains unchanged.
 NOTE: The following alarm may sound.
- Low Flow alarm if blood flow rate is below 30 ml/min.
- T1 Time alarm if 10 minutes have elapsed.
- T2 Time alarm if 20 minutes have elapsed.

(9) When collected volume reaches target volume, collection ends.

(e.g.)
 Clamp closes automatically.
 The START indicator lamp and symbol flash.
 End Collection alarm sounds (3 long beeps).
 Collection progress indicator is flashing.

(10) Press [END] key.

(e.g.)
 Crimp tubing. Follow the facility’s protocol to end donation.
 Display panel shows the total weight of the primary blood
bag including the anticoagulant with the weight of blood
collected.

(11) Label Checking Function (Optional)

Go to the next page.
(e.g.)
(12) If users need to check the elapsed time of donation, press
[TIMEBEEP] key shortly.
 It is displayed for 5 seconds.

(13) Press [CLAMP] key to open the clamp.

 Total weight and elapsed time will be cleared out.
(e.g.)
 Device is ready for the next collection.
NOTE:
 To finish blood collection, press [POWERCAL] key to
turn the device power off.
 Power turns off automatically if device is idle for 30 minutes.

(14) Remove the blood bags.

4-3
 The following procedure is applied when a barcode scanner is ready to use.
NOTE

(11) Label Checking Function (e.g.)

 Read a reference barcode label using a barcode scanner.

 A barcode pattern is displayed on the LED.
 Read a second barcode label. (e.g.)
 If the second read label is matched with the reference
label, “PS” is displayed on the LED and beeps for one
second. “PS” means “PASS”.
 If the second read label is not matched with the reference (e.g.)
label, “FL” is displayed on the LED and beeps on and off
three times with 0.25 seconds interval.
“FL” means “FAIL”.

 Repeat the step  above as many as necessary.

 To move to step (12), press any key.

 With no barcode reading for 20 seconds, it will move to
step (12) automatically.

4-4
4-3. Alarms
Alarming is informed in 2 ways – beep and indication.
Alarm Audible Lamp
◙ condition  remark ● action sound indication
1 End Collection Alarm:
◙ When collected volume reaches target volume; - 3 long beeps repeat per - green
● Clamp closes. 30 sec flashing
2 Low Flow Alarm: - yellow and
◙ When blood flow goes below the set limit; - 5 short beeps repeat per LOW &
 Limit is variable in Section 4-4. 12 sec ALARM
flashing
3 High Flow Alarm: - yellow and
◙ When blood flow goes above the set limit; - 14 short beeps repeat per &
Limit is variable in Section 4-4. 12 sec ALARM
flashing
4 T1 Time Alarm:
◙ When elapsed time passes 10 minutes; - 20 short beeps for 10 sec.
5 T2 Time Alarm: - yellow and
◙ When elapsed time passes 20 minutes; - short beeps sound &
 Clamp closes. ALARM
● To end collection, press [END] key. flashing
6 Low Battery Alarm:
◙ When battery charge is depleted; - one 5-sec long beep once - LOW
(approximately at 10 % of full charge) turns on
7 Tray Off Alarm:
◙ When tray is taken off from pedestal; - 20 short beeps for 10 sec
● Operation resumes if tray is placed on
8 Wrong Key Alarm
◙ When POWERCAL key is pressed during - 3 short beeps
blood collection cycle;

Timing diagram of beep tones;

4-5
4-4. Setting-up Parameters

1. Target volume preset;

 Press [PRESET] key during booting period of 10 seconds.
 Four pre-determined preset values can be set and changed.
 Default value of target volume preset can be changed by
[5 ml ▲] or [5 ml ▼] key in 5 ml steps. (e.g.)
 Press [START] key to save the changed value. 350/400/450/500
 Press [PRESET] key to move to next value and change the
value as above.
 Press [POWERCAL] key to get out of the mode.
At this time the device is powered off.
NOTE:
To remove a preset value, set up the value to ‘0’.

2. Low Flow Limit;

 Press [POWERCAL] key and [TIMEBEEP] key together
during booting period of 10 seconds. (e.g.)
 Low flow limit value(30 ml) can be changed by [5 ml ▲] or 30
[5 ml ▼] key in 5 ml steps.
 Press [POWERCAL] key to save the new value.
At this time the device is powered off.

3. High Flow Limit;

 Press [POWERCAL] key and [CLAMP] key together
during booting period of 10 seconds. (e.g.)
 High flow limit value(150 ml) can be changed by [5 ml ▲] 150
or [5 ml ▼] key in 5 ml steps.
 Press [POWERCAL] key to save the new value.
At this time the device is powered off.

4. T1 Time/T2 Time;
 Press [TIMEBEEP] key during booting period of 10
seconds.
 T1(10 min.) can be changed by [5 ml ▲] or [5 ml ▼] key (e.g.)
in 5 minute steps. 1 : 10
 Press [START] key to save the changed value.
 Press [TIMEBEEP] key, then T2 value is displayed.
 T2(20 min.) can be changed by [5 ml ▲] or [5 ml ▼] key (e.g.)
in 5 minute steps. 2 : 20
 Press [START] key to save the changed value.
 Press [POWERCAL] key to get out of the mode.
At this time the device is powered off.
NOTE:
To disable the T1 and T2 Time function, set up the value to ‘0’.

4-6
5. Motor Speed;
 Press [POWERCAL] key and [START] key together during
booting period of 10 seconds. (e.g.)
 Motor speed list will be displayed. 45-40-30-20-15
 Select a value by [5 ml ▲] or [5 ml ▼] key.
 Press [POWERCAL] key to save the new value.
At this time the device is powered off.

6. Conversion Ratio;
 Press [POWERCAL] key and [END] key together during
booting period of 10 seconds. (e.g.)
 Conversion ratio list will be displayed.
 Select a value by [5 ml ▲] or [5 ml ▼] key. 1.051-1.052-1.053-1.054-
 Press [POWERCAL] key to save the new value. 1.055-1.056-1.057-1.058-
At this time the device is powered off. 1.059-1.060-1.061

7. Sound ON/OFF;
 Press [TIMEBEEP] key for 3 seconds during normal operation.
 When muted, symbol appears on the display panel.
 To turn on, press the key and hold for 3 seconds again.

4-5. Weight Calibration

It is recommended that the weight calibration procedure be performed prior to the first donor
collection of the day. It is also recommended when collecting on a mobile vehicle, to repeat the
weight calibration procedure each time the vehicle is moved to a new location.

(1) Press [POWERCAL] key during booting period.

 Calibration mode starts.
 The display panel shows 0 GM.

(2) When 0 GM is displayed, place the 500-gram calibration weight

on the tray. A long beep sounds.
 The display panel shows bar-bar-bar.

CAUTION
Keep the calibration weight from moving.
Don't touch any part of the unit.

 In 10 seconds the display panel indication changes to 500

and ‘CAL’flashes.

(3) If ‘CAL’and ‘End’are flashing, calibration is done.

4-7
 If ‘500’ and ‘CAL’are flashing, remove the calibration
weight from the tray.
When ‘0’ gram and ‘rEP’ are flashing in turn, press the
[START] key.
 It goes to the step (2) above.

CAUTION
Before placing the standard weight, wait for 2 seconds.
If "E r r" is displayed, remove the standard weight from
the tray and restart the step (2) above.

(4) Remove the calibration weight from the tray.

(5) Press [POWERCAL] key to get out the mode.
At this time the device goes to booting period.
 REMARK: If AdJ is displayed and flashes instead of showing
500 on the LCD , it is an error message, which
requires an adjustment by a technical person.
Please contact a local distributor for service.

4-6. Battery Recharging

A. Battery operation:
 Once the battery pack is fully charged, the unit will run for approximately 15 hours.
 If the unit was stored for an extended period, recharge it before use.
 When battery charge is low and needs recharging, LOW symbol will appear in the
display panel. Recharge the battery.

NOTE: Even when LOW symbol is initially displayed, the battery pack will run the
unit for approximately 2 hours.

B. Recharging Battery:
The battery pack can be recharged in the mixer unit.
(1) Plug the AC power adapter into the jack on the rear side of the main unit.
(2) Connect the power cord plug to a wall outlet.
(3) Leave it for hours. It may take up to 4 hours to get full charged.
* When the adapter is connected, battery is under recharging even if device power
is turned off.

[Figure 4-1] Battery Recharging

The battery pack can also be recharged in the separate Battery Charger BC110.

4-8
 Recharging a battery for more than 4 hours will not be harmful to the battery.
NOTE 1

Expected lifetime of a rechargeable battery is about 6 months to 2 years.

If operation time is apparently reduced, or if nothing is displayed on the LCD
display panel when the power key is turned on, the battery pack might be
NOTE 2
worn out or have permanent damage. Replace with a new battery pack.
Contact user’s distributor for spare battery packs.

Only a correctly charged battery should be used with this device.

Exhausted batteries may cause temporary, unfavorable, and unpredictable
NOTE 3 results. The device only acts as a battery charger when it is turned off and the
AC power adapter is plugged in.

4-7. Moving Clamp Module Assembly

The tube clamp module is detachable and users can change its mounting place either to
the left or to the right side of the device.

[Figure 4-2] Moving Clamp Module Assembly

(1) Turn power switch off.

(2) Remove two M3 mounting screws on the bottom of the unit (# 1), and pull out
the clamp module assembly (#2) with a clamp cable connector.
(3) Insert the clamp cable connector (#3) into the mate connector through the other
clamp cable hole (#4) at the bottom side. Make sure that the black wired pin
should be placed at the top side.
(4) Install the clamp module assembly with two M3 mounting screws (#5).

4-9
5. Checks and Adjustments

This Chapter 5 describes how to check, adjust and calibrate several important parameters
of the equipment.

All procedures described in this chapter can be performed without opening the upper
cover. More professional fault isolation and troubleshooting procedures that should be
done with upper cover open are described in Chapter 6.

Following procedures are covered in this chapter ;

- Software version check and Panel key test

- Initial weight value check
- Weight adjustment
- Tray leveling

5- 1
5-1. Test Mode Subroutines

For service personnel to check major key components quickly without using any tool,
some software subroutine programs are prepared in the equipment.
One can check , button key failures, the load cell and its circuit performance with these
special test mode subroutines.
If any failure or malfunction is detected at these test mode procedures, fault isolation
and troubleshooting shall be done in accordance with the procedures in Chapter 6.

A. Software Version Check and Panel Key Test

(1) Turn power on.
(2) During booting period press [POWERCAL] key while pressing [TIMEBEEP] and
[CLAMP] key simultaneously.
 Two digits from the left indicate the software version number.
e.g. 10 means that version number is V1.0.
 Third digit from the left increases with ‘1’ interval whenever the panel key is
pressed. If same panel key is pressed repeatedly, the digit does not change.
If the panel key test is successfully done, the digit should show ‘8’.

(3) To finish the test mode, press [POWERCAL] key, and then it ends as power turns
off.

B. Initial Weight Value Check

(1) Turn power on.
(2) During booting period press [POWERCAL] key while pressing [UP] and
[DOWN] key simultaneously.
 Initial weight value which is currently set up will be displayed.

(3) To finish the test mode, press [POWERCAL] key, and then it ends as power turns
off.

5- 2
 C. Weight Adjustment
Designed tolerance of weight measurement is +/- 1 gram. For example, if
a standard weight of 500 grams is put on the tray, the display should show a figure
between ‘499’ and ‘501’. Otherwise, the equipment may be subject to calibration
by users.

Checking accuracy of weight measurement

(1) Prepare a known weight of about 500 grams.
(2) Turn power on and, wait until system booting is done. Put the standard weight
on the tray. Do not touch the equipment and table during system booting.
(3) If the display is out of ‘known weight+/-1 ‘, follow the procedures in Section
5-3.

5-2. Tray Leveling

Tray leveling is ensured by a magnetic position sensor and precision mechanism. After
long use for years, the tray might become unleveled. Leveling of the tray can be simply
adjusted by users.
(1) Prepare a flat (-) tip screwdriver, 3-5 mm (1/8-3/16”) in diameter.
(2) Turn power off and remove tray from tray mount.
(3) Identify the tray leveling screw (# 5 in the figure in Section 2-2) through the hole.
(4) Turn the screw clockwise, by about a half turn (180 degrees), to make the tray rotate
clockwise. The tray will rotate clockwise by a half degree.
Turn the screw counter-clockwise, by about a half turn (180 degrees), to make the
tray rotate counter-clockwise. The tray will rotate CCW by a half degree.
(5) Replace the tray and turn power on.
(6) Check tray leveling. If tray is not leveled, repeat from (2) to (5) again.

5- 3
5.3. Weight Calibration

It is recommended that the weight calibration procedure be performed prior to the first donor
collection of the day. It is also recommended when collecting on a mobile vehicle, to repeat the
weight calibration procedure each time the vehicle is moved to a new location.

(1) Press [POWERCAL] key during booting period.

 Calibration mode starts.
 The display panel shows 0 GM.

(2) When 0 GM is displayed, place the 500-gram calibration weight

on the tray. A long beep sounds.
 The display panel shows current reading of calibration
weight.

CAUTION
Keep the calibration weight from moving.
Don't touch any part of the unit.

 In 10 seconds the display panel indication changes to 500 and

‘CAL’flashes.
(3) If ‘CAL’and ‘End’are flashing, calibration is done.
If ‘500’ and ‘rEP’ are flashing, remove the calibration
weight from the tray.
When ‘0’ gram is displayed, press the [START] key.
 It goes to the step (2) above.

CAUTION
Before placing the standard weight, wait for 2 seconds.
If "E r r" is displayed, remove the standard weight from
the tray and restart the step (2) above.

(4) Remove the calibration weight from the tray.

(5) Press [POWERCAL] key to get out the mode.
At this time the device goes to booting period.
 REMARK: If AdJ is displayed and flashes instead of
showing 500 on the LCD , it is an error message, which
requires an adjustment by a technical person.
Please contact a local distributor for service.

5- 4
6. Troubleshooting

6-1. Precautions

When performing troubleshooting, keep following precautions ;

(1) Power should be turned off when subassemblies are plugged in or taken out.
(2) Use proper test equipment and tools.
(3) Attention should be taken when checking AC mains voltage.
(4) Excessive force should not be applied on the tray and load cell structures.
(5) When assembling upper cover case after troubleshooting, be sure that wiring
harnesses would not touch load cell, motor or any moving parts.
Wiring harnesses should not be too tight.

6-2. Test Equipment

Equipment and tools listed below are required to perform troubleshooting.

. Multimeter
. Screwdrivers
. A standard or known weight (about 500 grams)
. Oscilloscope (not a must to use)

6-3. Preparation

Before carrying out troubleshooting procedures in Section 6-4 to locate a faulty assembly
or components, follow the procedures below first.

Turn power on, and check the following items ;

a. Connection of each connector.
b. Power source (battery or adapter) voltage.
c. Power switch action.
d. Regulated +14V output at TP6 or TP4, 14.7V output at TP2 and +5V output at
TP3 on the Power Board. If any failure is detected in c. or d. above, replace the
Power Board.

6- 1
6-4. Troubleshooting Procedures

The troubleshooting flow charts in the [Figure 6-1] will guide service personnel to a
faulty assembly or components that should be replaced or corrected.
When a faulty assembly is isolated, it should be replaced with a new or good assembly.
In case that service personnel have good knowledge in electronics, proper components
and test equipment, the personnel can troubleshoot to isolate a single faulty component.
Technical information is prepared in the Chapters 7, 8 and 9.

Legend used in the Troubleshooting Flow Charts :

. Square ........ Action

. Diamond ........ Decision

. A Circle with ........ Connection to/from the other branch

alphabet.

. 1 Circle with ........ Connection to/from the other page

number.

.  Vertical ........ Path when "YES"

 line

.  Horizontal ........ Path when "NO"

line

6- 2
[Figure 6-1] Troubleshooting Flow Charts (Page 1 of 6)

6- 3
[Figure 6-1] Troubleshooting Flow Charts (Page 2 of 6)

6- 4
[Figure 6-1] Troubleshooting Flow Charts (Page 3 of 6)

6- 5
[Figure 6-1] Troubleshooting Flow Charts (Page 4 of 6)

6- 6
[Figure 6-1] Troubleshooting Flow Charts (Page 5 of 6)

6- 7
[Figure 6-1] Troubleshooting Flow Charts (Page 6 of 6)

6- 8
7. Schematic Diagrams

[Figure 7-1] System Wiring Diagram

7-1
[Figure 7-1] System Wiring Diagram

7-2
8. Technical Illustrations

[Figure 8-1] Exploded View of CM745

[Figure 8-2] CPU Board Layout

[Figure 8-3] Power Board Layout

[Figure 8-4] LCD Backlight Board Layout

[Figure 8-5] Battery Contact Board Layout

[Figure 8-6] Battery Terminal Board Layout

[Figure 8-7] Hall Sensor Board Layout

8-1
[Figure 8-1] Exploded View of CM745

8-2
 Top View

Bottom View

[Figure 8-2] CPU Board Layout

8-3
 Top View

Bottom View

[Figure 8-3] Power Board Layout

8-4
 Top View

Bottom View

[Figure 8-4] LCD Backlight Board Layout

Top View

Bottom View

[Figure 8-5] Battery Contact Board Layout

8-5
 Top View

Bottom View

[Figure 8-6] Battery Terminal Board Layout

[Figure 8-7] Hall Sensor Board Layout

8-6
9. Parts List

Each component shall be identified with manufacturer's part number in the Parts List.
Location of a part and component can be found by a Find Number in the [Figure 8-1] Exploded
View or in the printed circuit board layouts in the [Figure 8-2] ~ [Figure 8-7].
Prefix 'A' in a find number denotes that the part is not a single component but an assembly, and
a lower-level parts list of which is presented at another place.
An order for service spare parts to distributors or to manufacturer should be accompanied with
its part number or with a designation number.

9-1
 BLOOD COLLECTION MIXER CM745
FIND NO. DECSCRIPTION PART NO. Q’TY
1 TRAY 300-247 1
2 SCREW MCC04-08S 2
3 LABEL TRAY MOUNT 502-024 1
4 TRAY MOUNT 401-190 1
5 HANDLE 401-466 1
6 TOP CASE ASS’Y 400-076 1
7 BKT MOUNT 401-469 4
8 SCREW TRL30-06I 14
9 SPRING HANDLE 402-028 2
10 SCREW MPC03A06I 2
11 SCREW MPC03-16I 1
12 WASHER PL WPL03-00I 3
13 WASHER NYLON WPL03-00NY 1
14 HALL SENSOR BOARD ASS’Y 600-004 1
15 CAM FLANGE ASS’Y 400-024-1 1
16 SCREW MPC03S12I 2
17 SCREW MPC04-10K 2
18 WASHER SPRING WSB04-00K 2
19 MOVING BLOCK ASS’Y 300-051-1 1
20 SPACER SENSOR 302-010 1
21 MOTOR MOUNT B 301-033 1
22 MOVING MOTOR 102-008-5 1
23 MOTOR MOUNT PLATE 301-109 1
24 LOADCELL SPACER 401-434 1
25 LOADCELL 102-100-3 1
26 LOADCELL MOUNT BLOCK 301-086-1 1
27 WASHER SPRING WSB04-00S 4
28 SCREW MPC04-22I 4
29 SCREW MPC03S08I 2
30 LOADCELL STOPER 401-330-1 1
31 SCREW MCC06-16S 1
32 SCREW MCC04-10S 2
33 SCREW MPC03A16I 2
34 SCREW TRL03-08I 7
35 POWER BOARD ASS’Y 600-088 1
36 BKT PCB 401-467 1
37 CPU ASS’Y 600-150-1 1
38 SCREW MPC03S06I 4
39 BATTERY DOOR 201-102 1
40 BOTTOM CASE ASS’Y 400-078 1
41 SCREW MPC03A08I 4
42 PLATE BATTERY ASS’Y 400-098 1
43 BATTERY, LH025-H7C, 250mA, 8.4V 102-105 1
44 PLUG COVER 16.5 101-080 1
45 BATTERY CONTACT BOARD ASS’Y 600-086 1
46 SCREW MPC04S10I 4
47 BKT CLAMP 201-101 1

9-2
 BLOOD COLLECTION MIXER CM745
FIND NO. DECSCRIPTION PART NO. Q’TY
48 SCREW MCC03-06I 2
49 TUBE CLAMP MODULE ASS’Y 300-038-6 1
50 SCREW MCC03-30I 3
51 COVER OUTER WHITE 201-034-3 1
52 SCREW MPC03S08I 4
53 SERVO MOTOR 102-001-1 1
54 MOTOR MOUNT BRACKET 401-195-1 1
55 GUIDE PLATE 401-196-1 1
56 COVER INNER WHITE 201-035C-2 1
57 SCREW TCQ30-20S 4
58 ARM 301-071 1
59 RUBBER FOOT 204-018 1
60 SCREW TRL26-08I 1
61 CAM FLANGE 201-036-1 1
62 SCREW TCQ30-10S 1

CPU ASS’Y 600-150-1 1

POWER BOARD ASS’Y 600-088 1
BATTERY CONTACT BOARD ASS’Y 600-086 1
HALL SENSOR BOARD ASS’Y 600-004 1

WIRING HARNESS ASS’Y, SPEAKER WHS-225 1

WIRING HARNESS ASS’Y, MOTOR WHS-225-1 1
WIRING HARNESS ASS’Y, SENSOR WHS- 035-1 1
WIRING HARNESS ASS’Y, LOADCELL WHS- 219 1
WIRING HARNESS ASS’Y, GROUND WHS- 134 1
WIRING HARNESS ASS’Y, CPU-POWER WHS- 242 1
WIRING HARNESS ASS’Y, CHARGER-POWER WHS- 215 1
WIRING HARNESS ASS’Y, BATTERY SNAP WHS- 234 1

BATTERY PACK BL101 102-107-1 1

BARCODE SCANNER 102-090-1 1

POWER CORD, 110V 603-009 1

POWER CORD, 220V 603-011 1
AC POWER ADAPTER 102-103 1

SAMPLE TUBE HOLDER 300-225 1

500 GRAM WEIGHT 102-069 1
CANVAS CARRYING BAG 205-009-1 1

9-3