Bose® Pro RoomMate®
Powered Speaker System
Contents
Safety Information ............................................................................................................................ 2
Electrostatic Discharge Sensitive (ESDS) Device Handling ........................................................ 2
Specifications ................................................................................................................................... 3
Disassembly Assembly Procedures .............................................................................................. 4
Test Procedures ............................................................................................................................... 5
Part List Notes .................................................................................................................................. 6
Main Assembly Part List .................................................................................................................. 7
Figure 1. Main Assembly .................................................................................................................. 7
Electrical Part List ......................................................................................................................... 8-9
Figure 2. Volume Control/IO PCB .................................................................................................. 10
Figure 3. Main PCB Layout ............................................................................................................ 10
CAUTION: THE BOSE® PRO ROOMMATE® CONTAINS NO USER SERVICEABLE
PARTS. TO PREVENT WARRANTY INFRACTIONS, REFER SERVICING
TO WARRANTY SERVICE STATIONS OR FACTORY SERVICE.
PROPRIETARY INFORMATION
THIS DOCUMENT CONTAINS PROPRIETARY INFORMATION OF
BOSE® CORPORATION WHICH IS BEING FURNISHED ONLY FOR
THE PURPOSE OF SERVICING THE IDENTIFIED BOSE PRODUCT
BY AN AUTHORIZED BOSE SERVICE CENTER OR OWNER OF THE
BOSE PRODUCT, AND SHALL NOT BE REPRODUCED OR USED
FOR ANY OTHER PURPOSE.
Warranty Information
The Bose Pro RoomMate is covered by a limited 1 - year transferable warranty.
Part Number 138600 REV. 01
1
SAFETY INFORMATION
1. Parts that have special safety characteristics are identified by the symbol on
schematics or by special notes in the part lists. Use only replacement parts that
have critical characteristics recommended by the manufacturer.
2. Make leakage current or resistance measurements to determine that exposed
parts are acceptably insulated from the supply circuit before returning the unit
to the customer. Use the following checks to perform these measurements:
A. Leakage Current Hot Check: With the unit completely assembled, plug the AC line cord
directly into a 120 VAC outlet. (Do not use an isolation transformer during this test.) Use a
leakage current tester or a metering system that complies with American National Standards
Institute (ANSI) C101.1 "Leakage Current for Appliances" and Underwriters Laboratories (UL)
1492 (71). With the unit's AC switch first in the ON position and then in the OFF position,
measure from a known earth ground (metal water pipe, conduit, etc.) to all exposed metal
parts of the unit (antennas, handle bracket, metal cabinet, screw-heads, metallic overlays,
control shafts, etc.), especially any exposed metal parts that offer an electrical return path to
the chassis. Any current measured must not exceed 0.5 milliamp. Reverse the unit's power
cord plug in the outlet and repeat the test. ANY MEASUREMENTS NOT WITHIN THE LIMITS
SPECIFIED HEREIN INDICATE A POTENTIAL SHOCK HAZARD THAT MUST BE ELIMI-
NATED BEFORE RETURNING THE UNIT TO THE CUSTOMER.
B. Insulation Resistance Test Cold Check: (1) Unplug the power supply and connect a
jumper wire between the two prongs of the plug. (2) Turn on the power switch of the unit. (3)
Measure the resistance with an ohmmeter between the jumpered AC plug and each exposed
metallic cabinet part on the unit. When the exposed metallic part has a return path to the
chassis, the reading should be between 1 and 5.2 Meg ohms. When there is no return path to
the chassis, the reading must be "infinite". If it is not within the limits specified, there is the
possibility of a shock hazard, and the unit must be repaired and rechecked before it is returned
to the customer.
ELECTROSTATIC DISCHARGE SENSITIVE (ESDS)
DEVICE HANDLING
This unit contains ESDS devices. We recommend the following precautions when repairing,
replacing or transporting ESDS devices:
• Perform work at an electrically grounded work station.
• Wear wrist straps that connect to the station or heel straps that connect to conductive floor
mats.
• Avoid touching the leads or contacts of ESDS devices or PC boards even if properly
grounded. Handle boards by the edges only.
• Transport or store ESDS devices in ESD protective bags, bins, or totes. Do not insert
unprotected devices into materials such as plastic, polystyrene foam, clear plastic bags,
bubble wrap or plastic trays.
2
SPECIFICATIONS
Dimensions: 9" H x 6" D x 6" H (15.2 x 22.9 x 15.2) cm
Weight: 12 lb. (5.9 kg)
Transducer: 1, 4.5" full-range driver per cabinet
Cabinet: High impact molded copolymer styrene
Power
Requirements: 120 VAC, 30 W
Maximum SPL: 100 dB (1 W, 1 meter, 300 Hz to 3 kHz)
Frequency
Response: 80 Hz-13 kHz (-2 dB)
Input Impedance: Two line level inputs; 1 kΩ, 10 kΩ (20 kΩ dc resistance)
Volume Control: Rear mounted
3
DISASSEMBLY ASSEMBLY PROCEDURES
The numbers in parenthesis refer to the call-
outs in Figure 1.
1. Grille Removal
1.1 using a scribe, grasp the corner edges
of the grille (6) and pry off the grille.
2. Grille Replacement
2.1 Line up the corners of the grille (6) with
the cabinet and press the grille into place.
3. Driver Removal
3.1 Remove the three screws (3) that
secure the driver (1) to the cabinet.
3.2 Lift the driver out and cut the wires as
close as possible to the driver terminal.
4. Driver Replacement
4.1 Attach the wires to the driver terminal
(1), referring to the schematic for the wiring
configuration.
4.2 Secure the driver to the cabinet with
three screws (3).
5. PCB Removal
5.1 Remove the six screws (5) that secure
the baffle to the cabinet.
5.2 Place a screw driver into the baffle port
and pry out the baffle.
5.3 Loosen the two screws located in the
front of the PCB and then pull straight out
on the PCB.
6. PCB Replacement
6.1 Place the PCB into the cabinet so that it
is secured by the tabs located in the rear of
the cabinet.
6.2 Secure the front of the PCB to the
cabinet with two screws.
4
TEST PROCEDURES
Test Setup 4.2 Measure the distortion at the left and
Connect a 2 Ω, 5 W resistor to the left and right output. It should be <0.30%.
right output. The left output is 180° out of
phase with respect to the right output. Do 5. Compressor Test
not ground the negative terminal of the
accessory output with the test equipment. 5.1 Apply a 1 kHz, 575 mVrms signal to the
This will short the accessory amp output to left and right auxiliary input.
ground and may cause failure.
5.2 Reference a dB meter to the applied
1. Idle Current signal.
1.1 Disconnect one of the red wires from 5.3 Measure the output. It should be 13.6 ±
the transformer secondary. Insert an AMP 1.8 dB (2.55 Vrms).
meter in series with the red wire and the
post on the PCB it was connected to. 5.4 Apply a 1 kHz, 730 mVrms signal to the
Measure the current flow. It should be left and right auxiliary input.
<310 mA.
5.5 Reference a dB meter to the applied
2. Reference Gain signal.
2.1 Apply a 1 kHz, 100 mVrms signal to the 5.6 Measure the left and right output. It
left and right auxiliary input. Reference a should be 13.6 ± 1.8 dB (2.55 Vrms).
dB meter to the applied signal.
6. Separation Test
2.2 Measure the left or right output. It
should be 18.6 ± 1.8 dB referenced to the 6.1 Apply a 1 kHz, 440 mVrms signal to the
measurement taken in 2.1. left auxiliary input and short the right auxil-
iary input.
3. Frequency Response
6.2 Measure the right channel output. It
3.1 Apply a 1 kHz, 100 mVrms signal to the should be <200 mVrms. Repeat this proce-
left and right auxiliary input. dure for the right channel.
3.2 Reference a dB meter to the left chan- 7. Noise test
nel output.
7.1 Short the auxiliary and line input.
3.3 Measure the output according to the
following table. Repeat this procedure for 7.2 Measure the output of the left and right
the right channel. output. It should be <250 uVrms
A-weighted.
Frequency Output
100 Hz + 15.7 ± 1.8 dB 8. Output Offset
1 kHz 0 dB (reference)
10 kHz + 15.7 ± 1.8 dB 8.1 With no signal applied, measure the left
and right output. It should be <50 mVDC.
4. Distortion Test
4.1 Apply a 10 kHz, 50 mVrms signal to the
left and right auxiliary input.
5
PART LIST NOTES
1. This part is not normally available from customer service. Approval from the Field Service
Manager is required before ordering.
2. The individual parts located on the PCB are listed in the part list.
3. This part is critical for safety purposes. Failure to use a substitute replacement with the
same safety characteristics as the recommended replacement part might create shock, fire
and/or other hazards.
4. If part number 127067 (ULN3751Z) is no longer available, use part number 192824 (TDA
2040) and add a 1 kΩ resistor and a .01 uF capacitor between pins 1 and 2 of the op-amp. The
resistor and cap is required to prevent oscillation. Refer to the schematics below. There is a kit,
part number 143922-B1K, that contains the parts needed to replace both op-amps. Both Op-
Amps must be changed at the same time.
V+
C109
R116
1 5.1K R119
+
11K
ACCESSORY
2 5
- SPEAKER
4 BN-
U3
1 + R120
3
1.5,5%
A OR+
ULN3751Z
C110
R117 .22
11K
C5 C6 RD
4700 4700
V- + +
YL
+ RD
- Z1
C3
R217 .1 POWERED
C209 ULN3751Z
R216 11K C212 SPEAKER
1 BK-
+ 5.1K 1 .012
3
4
U4
2 RD+
5 R220
1.5,5%
C4 B
R218 R219 .22 C210 V+
C109
5.1K 11K .22 R116
1 5.1K R119
+
R121 11K
1K 2 5 ACCESSORY
-
BN- SPEAKER
Old Schematic Diagram 1
U3
4
+ R120
3
C113 1.5,5% OR+
TDA2040 A
.01
C110
R117 .22
11K
C5 C6 RD
V- 4700 4700
+ +
YL
+ RD
- Z1
C3
R217 .1 POWERED
C209 R216
1 11K
TDA2040 C212
5.1K BK- SPEAKER
+ 1 3 .012
R221 4
U4
1K 2 R220 RD+
5
1.5,5%
C4 B
C213 C210
.01 R219 .22
11K .22
R218
5.1K
New Schematic Diagram
6
ELECTRICAL PART LIST
Resistors
Reference Designator Description Part Number Note
R1, 5 1M, 1/4W, CF, 5% 117704-1211055
R2 91k, 1/4W, CF, 2% 117704-1219132
R3, 106,115, 206, 215 100k, 1/4W, CF, 2% 117704-1211042
R4, 122, 123 10k, 1/4W, CF, 5% 117704-1211035
R101, 107, 108, 110, 201, 207, 208, 24k, 1/4W, CF, 2% 117704-1212432
210
R102, 202 18.2k, 1/4W, CF, 1% 119976-1211822
R103, 104, 203, 204 8.2k, 1/4W, CF, 2% 117704-1218222
R105, 114, 214, 205 820Ω, 1/4W, CF, 2% 117704-12118212
R109, 209 36k, 1/4W, CF, 2% 117704-1213632
R111, 211 1.k, 1/4W, CF, 1% 119976-2211001
R112, 212 1.69k, 1/4W, CF, 1% 119976-2211691
R113, 213 30k, 1/4W, CF, 2% 117704-1213032
R116, 216, 218 5.1k, 1/4W, CF, 2% 117704-1215122
R117, 217, 119, 219 11k, 1/4W, CF, 2% 117704-1211132
R120, 220 1Ω, 1/4W, CF, 5% 117704-1211R05
R121, 221 2k, 1/4W, CF, 1% 119976-2212001
VR-1 20k, 8-PIN, POT 131181
Capacitors
Reference Designator Description Part Number Note
C1, 3, 4, 7 .1uF, CER. 117502
C2 10uF, ELECT., 35V 119944-100
C5, 6 4700uF, ELECT., 16V 124997
C101, 210, 109, 209 1uF, ELECT., 50V 119942-1R0
C102, 202 47pF, CER., 5% 119617-470
C103, 203 .15uF, FILM, 5% 118091-154
C104, 204 .0068uF, FILM, 5% 118091-682
C105, 205 .1uF, FILM, 5% 118091-104
C106, 206 .0018uF, FILM, 5% 118091-182
C107, 207 22uF, ELECT., 35V 119944-220
C108, 208 .100pF, ELECT., 5% 119617-101
C110, 210 .22uF, FILM 122026-224
Diodes
Reference Designator Description Part Number Note
D1, 2, 101, 102, 201, 202 IN4148 121501
Z1 KBP 005 135687 3
Transistors
Reference Designator Description Part Number Note
Q1 PNP, A608 119168
Q101, 201 NPN, C536 117921
8
ELECTRICAL PART LIST
Integrated Circuit
Reference Designator Description Part Number Note
U1 RC4559 108568
U2 LS404 120535
U3, 4 ULN3751 127067 4
or
192824
Miscellaneous
Reference Designator Description Part Number Note
XFORMER, 120V 128056 or 264601 3
XFORMER, 230V 128057
XFORMER, 115V/230V 131735
LINE CORD, 120V 125710 3
LINE CORD, 220V 125711
ADAPTOR, STEREO, MINI 128404
TO RCA
CABLE, RCA TO RCA 102876
STRAIN RELIEF 124724
CLOSED RELIEF 125618
TRANSFORMER MOUNT SCREW, HEX WSHR. 125916
FACE, #8 X 3/4
SWITCH, LINE VOLTAGE 124854 3
SELECTOR
SWITCH, POWER 130412 3
(220, 240V)
GASKET 128409
(220V, 240V, MILITARY)
TERMINAL (220, 240V) 130412
SCREW, BK, CR REC #6 131122-10
X 5/8 L (220, 240V)
SPEED NUT 125571
(220, 240V MILITARY)
U3, 4 HEAT SINK 129364
NUT, KEP 4-40 100413-5
SCREW, 4-40 1/4" 103140-04
BUMPER, PCB 103593
INTERCONNECT CABLE 130915
FRONT PCB MOUNT SCREW, HEX, WSHR, 124721-06
FACE #6 X 3/8"
FRONT PCB MOUNT TINNERMAN NUT 124617
REAR PCB MOUNT TINNERMAN O CUP 124722
SHIELD, PCB 128552
SHIELD, METAL RF 128740
NYLON SPACER 128804
PLASTIC RIVET 128805
WIRE CLAMP 128818
SOLDER LUG ASSY. 128479
PACKAGING CARTON 131125
PACKAGING CORRUGATED DIVIDER 125604
PACKAGING OWNER'S MANUAL 130908
PACKAGING FOAM FILLER 124921
9
Figure 2. Volume Control/IO PCB
Figure 3. Main PCB Layout
10
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