Bose Companion 3 Series II User manual

Companion®3 Series II Multimedia
Speaker System
©2007 Bose Corporation Service Manual
Reference Number 297700-SM Rev. 05
Electronic copy only
The Companion 3 series II multimedia speaker system is a stereo system designed to be used as a computer
sound system. It can be used with any analog audio source. It has a bass module with a 6.5 inch dual voice
coil woofer in a slot ported design. The two satellite speakers connect to the bass module and are mounted
to speaker stands. The speakers can be placed on a desk or other surface when removed from the stands. A
wired remote control pod is used to control volume and mute/un-mute functions. The system also has a
second input and a stereo headphone output on the control pod.
Product Description

2
Warranty
The Bose®Companion®3 series II MultiMedia Speaker System is covered by a 1-year, transferable
limited warranty.
Caution: The Companion 3 series II MultiMedia Speaker System contains no user serviceable parts.
To prevent warranty infractions, refer servicing to warranty service centers 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.
Contents
Safety Information ............................................................................................................................. 3
Electrostatic Discharge Sensitive (ESDS) Device Handling .......................................................3
Specifications....................................................................................................................................4
Part List Notes ..................................................................................................................................5
Figure 1. Bass Module Assembly Exploded View ..............................................................................56
Bass Module Assembly Parts List ...................................................................................................6
Figure 2. Amplifier Module Assembly Exploded View...........................................................................7
Amplifier Module Assembly Parts list ..............................................................................................7
Figure 3. Packing Exploded Veiw ........................................................................................................8
Packing Parts List .............................................................................................................................8
Electrical Parts List .................................................................................................................... 9-19
Main PCB Assembly Parts List................................................................................................... 9-17
Power Supply PCB Assembly Parts List ................................................................................. 18-19
Disassembly Procedures ......................................................................................................... 20-22
Test Procedures ....................................................................................................................... 23-25
Theory of Operation ................................................................................................................. 26-28
Revision History .............................................................................................................................29

3
Safety Information
1. Parts that have special safety characteristics are identified by the symbol on the schematics
or by special notes on the parts list. 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 reassembled, plug the AC line cord directly
into a 120V AC outlet. (Do not use an isolation transformer during this test). Use a leakage current
tester or a metering system that complies with the American National Standards Institute (ANSI)
C101.1 “Leakage Current for Appliances” and the Underwriters Laboratories (UL) 6500/IEC 60056
paragraph 9.1.1. With the unit AC switch first in the ON position and then in the OFF position, mea-
sure from a known earth ground (metal waterpipe, conduit, etc.) to all exposed metal parts of the unit
(antennas, handle bracket, metal cabinet, screwheads, metallic overlays, control shafts, etc.) espe-
cially 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 power cord plug in the AC outlet and repeat the test.
ANY MEASUREMENTS NOT WITHIN THE LIMITS SPECIFIED HEREIN INDICATE A POTENTIAL
SHOCK HAZARD THAT MUST BE ELIMINATED BEFORE RETURNING THE UNIT TO THE CUS-
TOMER.
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 resis-
tance with an ohmmeter between the jumpered AC plug and each exposed metallic cabinet part on
the unit. When testing 3 wire products, the resistance measured to the product enclosure should be
between 2 and infinite MOhms. Also, the resistance measured to exposed input/output connectors
should be between 4 and infinite MOhms. When testing 2 wire products, the resistance measured to
exposed input/output connectors should be between 4 and infinite MOhms. 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.

4
Specifications
Mechanical
Dimensions: Bass Module: 8 5/8 “ H x 7 1/8” W x 14” D
(21.8 x 18 x 35.56 cm)
Satellite Speaker:
(no stand)
2 1/2” H x 2 3/4” W x 2 3/8” D
(6.14 x 6.86 x 6.03 cm)
Control Pod: 2 1/2 “ D x 1 1/8” H
(6.35 x 2.79 cm)
Weight: Bass Module: 14.65 lbs (6.64 kg) unpacked
Satellite Speaker: .75 lbs (0.34 kg) each
Packaged System: 20.15 lbs (9.13 kg) packed
Finish: Bass Module: Scratch-resistant, satin-finish
vinyl
Satellites: Painted polymer finish
Bass Box: Slot ported
Bass Box Port Tuning: 45 Hz
Electrical
Power Rating: USA/Canada: 115 VAC 50/60 Hz
Japan: 100 VAC 50/60 Hz
Euro: 230 VAC 50/60 Hz
Nominal System
Bandwidth:
40 Hz to 15 kHz
Maximum SPL: 100 dB (A weighted) pink
noise signal
Output: Bass: 60 Watts
Satellites: 18 Watts per channel

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 on the PCBs are listed in the Electrical 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. The part number listed is an assembly part number. The individual parts of the assembly might not
be available separately.
5. This part is referenced for informational purposes only. It is not stocked as a repair part. Refer to
the next higher assembly for a replacement part.

6
Figure 1. Bass Module Assembly Exploded View
1
2
3
4
8
6
5
7
X3
X5
Bass Module Assembly Exploded View
*Capacitor C7 on the new power suppl
y
board ma
y
need to be replaced, see Service Bulletin 271885-B4
Item Description Part Number Qty. Note
1 BASS MODULE, ASSY, US/CANADA, 120V (Electrofoil Logo)
BASS MODULE, ASSY, EURO, 230V (Electrofoil Logo)
BASS MODULE, ASSY, JAPAN, 100V (Electrofoil Logo)
BASS MODULE, ASSY, US/CANADA, 120V (Padprint Logo)
BASS MODULE, ASSY, EURO, 230V (Padprint Logo)
BASS MODULE, ASSY, JAPAN, 100V (Padprint Logo)
(Complete bass module package, includes Amp Mod Assy)
*300905-001
*300905-003
*300905-002
*303939-112
*303939-122
*303939-132
1
1
1
2 CLEAT, ABS 271817-001 1 5
3 SCREW, 4 x 1, THDF, FLHD, 82 DEG, PH 274151-16 3
4 CLIP, SPRING, KNOB 262542 1
5 KNOB, VOL CNTL, BLK 271860-001 1
6 LABEL, I/O, US/CANADA, 120V
LABEL, I/O, JAPAN, 100V
LABEL, I/O, EURO, 230V
300954-001
300954-002
300954-003
1
7 SCREW, TF, 4 x 3/4, PAN, PH, BLK 273556-12 5
8 MOD ASSY, AMP, 120V
MOD ASSY, AMP, 220V, EURO
MOD ASSY, AMP, 100V JAPAN
*307876-011
*307876-033
*307876-022
1
1
1
3
- XFORMER, TORROID, 105W, 15VDC, 7A
TRANSFORMER, TOROID, 100V, 60Hz
TRANSFORMER, TOROID, 230V, 50Hz
271818-001
N/A
277613-001

7
Item Description Part Number Qty. Note
1 PCB ASSY, MAIN 277574-001 1 5
2 BRACKET, METAL, IC 271859 1 5
3 HEATSINK, EXTRUDED, COMP 3 271856 1 5
4 CLIP, THERMAL, THERMISTOR 272964-001 1 5
5 HEAT SPREADER, ALUM 279844-001 1 5
6 SCREW, TAPP, 6-13x.625, PAN, XRC/S 172783-10 4
7 CONN, SWITCH, POWER, 3P 273115-001 1 5
8 PCB ASSY, PS, 120V, US
PCB ASSY, PS, 100V, JAPAN
PCB ASSY, PS, 220V, EURO
*307872-011
*307872-022
*307872-033
1
1
1
4
4
4
*Capacitor C7 on the new power supply board may need to be replaced, see Service Bulletin 271885-B4
Figure 2. Amplifier Module Assembly
1
23
4
5
6
8
7
Amplifier Module Assembly

8
1
3
6
7
8
9
10
4
2
5
3
Figure 3. Packaging Exploded View
*Capacitor C7 on the newpower supply board may need to be replaced, see Service Bulletin 271885-B4
Item
Number Description Part Number Qty. Notes
1 FEET, CLEAR SATELLITE 178321-04 2
2 FEET, RUBBER, BRACKET 260465 1
3 PACKING EPS,FILLER (includes both top and bottomfiller) 300908-001 1
4 CONTROL POD,
(
NON-REPAIRABLE
)
307874-002 1
5 CABLE, INPUT, 3.5MM,6FT, BLK 271994-001 1
6 LINE CORD,100V, BLK,JAPAN
LINE CORD, 120V, BLK,US/CANADA
LINE CORD, 220V, BLK,EURO
LINE CORD, 230V, BLK,UK
LINE CORD, 240V, BLK,AUS
264514-001
262814-001
148203
134725
284243-001
1 3
7 BASS MODULE, ASSY, US/CANADA, 120V (Electrofoil Logo)
BASS MODULE, ASSY, EURO, 230V (ElectrofoilLogo)
BASS MODULE, ASSY, JAPAN, 100V (Electrofoil Logo)
BASS MODULE, ASSY, US/CANADA, 120V (Padprint Logo)
BASS MODULE, ASSY, EURO, 230V (Padprint Logo)
BASS MODULE, ASSY, JAPAN, 100V (Padprint Logo)
(
Com
p
lete bass module
p
acka
g
e, includes Am
p
Mod Ass
y)
*300905-001
*300905-003
*300905-002
*303939-112
*303939-122
*303939-132
1
8 SAT, ASSY (Electrofoil Logo)
SAT, ASSY (Padprint Logo)
(
sin
g
le arra
y
, includes s
p
eaker stand
)
300766-001
303938-002 2
9 OWNERS GUIDE,3 LANG, US/CANADA
OWNERS GUIDE, 5 LANG, EURO
OWNERS GUIDE, 5 LANG, AP
296583
296584
299450
1
10 CARTON, RSC, PRINTED 300911-001 1
- CARTON KIT 300911-001K 1
Packaging Part List

9
Reference
Designator
Description Part Number Note
R101 1.21K, 0805, 1/10W, 1% 133625-1211
R102 1.30K, 0805, 1/10W, 1% 133625-1301
R103 9.53K, 0805, 1/10W, 1% 133625-9531
R104 10.0K, 0805, 1/10W, 1% 133625-1002
R105 127K, 0805, 1/10W, 1% 133625-1273
R106 127K, 0805, 1/10W, 1% 133625-1273
R107 10.0K, 0805, 1/10W, 1% 133625-1002
R108 10.0K, 0805, 1/10W, 1% 133625-1002
R109 2.00K, 0805, 1/10W, 1% 133625-2001
R110 10.0K, 0805, 1/10W, 1% 133625-1002
R111 10.0K, 0805, 1/10W, 1% 133625-1002
R125 2.55K, 0805, 1/10W, 1% 133625-2551
R126 200K, 0805, 1/10W, 1% 133625-2003
R127 47.5K, 0805, 1/10W, 1% 133625-4752
R128 1.10K, 0805, 1/10W, 1% 133625-1101
R129 21.5K, 0805, 1/10W, 1% 133625-2152
R130 330 OHM, 0805, 1/10W, 1% 133625-3300
R131 6.81K, 0805, 1/10W, 1% 133625-6811
R132 17.4K, 0805, 1/10W, 1% 133625-1742
R133 1.62K, 0805, 1/10W, 1% 133625-1621
R134 2.00K, 0805, 1/10W, 1% 133625-2001
R135 1.00K, 0805, 1/10W, 1% 133625-1001
R136 1.82K, 0805, 1/10W, 1% 133625-1821
R137 10.0K, 0805, 1/10W, 1% 133625-1002
R138 2.00K, 0805, 1/10W, 1% 133625-2001
R139 1.50K, 0805, 1/10W, 1% 133625-1501
R140 1.50K, 0805, 1/10W, 1% 133625-1501
R201 1.21K, 0805, 1/10W, 1% 133625-1211
R202 1.30K, 0805, 1/10W, 1% 133625-1301
R203 9.53K, 0805, 1/10W, 1% 133625-9531
R204 127K, 0805, 1/10W, 1% 133625-1273
R205 10.0K, 0805, 1/10W, 1% 133625-1002
R206 127K, 0805, 1/10W, 1% 133625-1273
R207 10.0K, 0805, 1/10W, 1% 133625-1002
R208 10.0K, 0805, 1/10W, 1% 133625-1002
R209 10.0K, 0805, 1/10W, 1% 133625-1002
R210 10.0K, 0805, 1/10W, 1% 133625-1002
R211 2.00K, 0805, 1/10W, 1% 133625-2001
R225 100K, 0805, 1/10W, 1% 133625-1003
R226 100K, 0805, 1/10W, 1% 133625-1003
R227 JUMPER, CHIP, 0805 133627
R229 2.55K, 0805, 1/10W, 1% 133625-2551
R230 200K, 0805, 1/10W, 1% 133625-2003
R231 47.5K, 0805, 1/10W, 1% 133625-4752
R232 1.10K, 0805, 1/10W, 1% 133625-1101
ELECTRICAL PARTS LIST
Main PCB Assembly
Resistors

10
Reference
Designator
Description Part Number Note
R233 21.5K, 0805, 1/10W, 1% 133625-2152
R234 330 OHM, 0805, 1/10W, 1% 133625-3300
R235 6.81K, 0805, 1/10W, 1% 133625-6811
R236 17.4K, 0805, 1/10W, 1% 133625-1742
R237 1.62K, 0805, 1/10W, 1% 133625-1621
R238 2.00K, 0805, 1/10W, 1% 133625-2001
R239 1.00K, 0805, 1/10W, 1% 133625-1001
R240 1.82K, 0805, 1/10W, 1% 133625-1821
R241 10.0K, 0805, 1/10W, 1% 133625-1002
R242 2.00K, 0805, 1/10W, 1% 133625-2001
R243 1.50K, 0805, 1/10W, 1% 133625-1501
R244 1.50K, 0805, 1/10W, 1% 133625-1501
R301 100 OHM, 0805, 1/10W, 1% 133625-1000
R302 100 OHM, 0805, 1/10W, 1% 133625-1000
R305 10.0K, 0805, 1/10W, 1% 133625-1002
R306 10.0K, 0805, 1/10W, 1% 133625-1002
R307 1.2 OHMS, 2512, 1W, 5% 181895-1R20
R308 1K, 2512, 1W, 5% 181895-1001
R309 100 OHM, 0805, 1/10W, 1% 133625-1000
R310 100 OHM, 0805, 1/10W, 1% 133625-1000
R311 JUMPER, CHIP, 0805 133627
R312 JUMPER, CHIP, 0805 133627
R314 1.00K, 0805, 1/10W, 1% 133625-1001
R315 1.00K, 0805, 1/10W, 1% 133625-1001
R316 249 OHM, 0805, 1/10W, 1% 133625-2490
R317 249 OHM, 0805, 1/10W, 1% 133625-2490
R318 100K, 0805, 1/10W, 1% 133625-1003
R319 249 OHM, 0805, 1/10W, 1% 133625-2490
R320 1.00K, 0805, 1/10W, 1% 133625-1001
R323 487K, 0805, 1/10W, 1% 133625-4873
R324 12.1K, 0805, 1/10W, 1% 133625-1212
R325 12.1K, 0805, 1/10W, 1% 133625-1212
R327 JUMPER, CHIP, 0805 133627
R328 JUMPER, CHIP, 0805 133627
R329 16.2K, 0805, 1/10W, 1% 133625-1622
R330 78.7K, 0805, 1/10W, 1% 133625-7872
R331 2.00K, 0805, 1/10W, 1% 133625-2001
R334 100K, 0805, 1/10W, 1% 133625-1003
R335 100K, 0805, 1/10W, 1% 133625-1003
R336 10 OHM, 2512, 1W, 5% 181895-10R0
R337 162 OHM, 0805, 1/10W, 1% 133625-1620
R338 14.0K, 0805, 1/10W, 1% 133625-1402
R339 1.00K, 0805, 1/10W, 1% 133625-1001
R340 10.0K, 0805, 1/10W, 1% 133625-1002
R347 2.00K, 0805, 1/10W, 1% 133625-2001
ELECTRICAL PARTS LIST
Main PCB Assembly
Resistors

11
Reference
Designator
Description Part Number Note
R348 2.00K, 0805, 1/10W, 1% 133625-2001
R349 JUMPER, CHIP, 0805 133627
R350 JUMPER, CHIP, 0805 133627
R351 100OHM, 0805, 1/10W, 1% 133625-1000
R352 1.00K, 0805, 1/10W, 1% 133625-1001
R353 1.00K, 0805, 1/10W, 1% 133625-1001
R354 1.00K, 0805, 1/10W, 1% 133625-1001
R355 1.00K, 0805, 1/10W, 1% 133625-1001
R356 499K, 0805, 1/10W, 1% 133625-4993
R357 10.0K, 0805, 1/10W, 1% 133625-1002
R358 1.1 OHM, SMD, FUSE, 1/10W, 5% 192349-1R1A 3
R359 1.1 OHM, SMD, FUSE, 1/10W, 5% 192349-1R1A 3
R360 1.1 OHM, SMD, FUSE, 1/10W, 5% 192349-1R1A 3
R361 1.1 OHM, SMD, FUSE, 1/10W, 5% 192349-1R1A 3
R362 JUMPER, CHIP, 0805 133627
R401 100K, 0805, 1/10W, 1% 133625-1003
R402 10.0K, 0805, 1/10W, 1% 133625-1002
R403 221 OHM, 0805, 1/10W, 1% 133625-2210
R404 10.0K, 0805, 1/10W, 1% 133625-1002
R405 1.00K, 0805, 1/10W, 1% 133625-1001
R406 1.00K, 0805, 1/10W, 1% 133625-1001
R407 1.00K, 0805, 1/10W, 1% 133625-1001
R408 1.00K, 0805, 1/10W, 1% 133625-1001
R409 5.90K, 0805, 1/10W, 1% 133625-5901
R410 5.90K, 0805, 1/10W, 1% 133625-5901
R950 2.55K, 0805, 1/10W, 1% 133625-2551
R951 4.12K, 0805, 1/10W, 1% 133625-4121
R952 1.0M, 0805, 1/10W, 1% 133625-1004
R953 10.0K, 0805, 1/10W, 1% 133625-1002
R954 750 OHM, 0805, 1/10W, 1% 133625-7500
R956 88.7K, 0805, 1/10W, 1% 133625-8872
R957 1.21K, 0805, 1/10W, 1% 133625-1211
R958 10.0K, 0805, 1/10W, 1% 133625-1002
R959 1.00K, 0805, 1/10W, 1% 133625-1001
R960 36.5K, 0805, 1/10W, 1% 133625-3652
R961 36.5K, 0805, 1/10W, 1% 133625-3652
R962 1.0M, 0805, 1/10W, 1% 133625-1004
R963 26.7K, 0805, 1/10W, 1% 133625-2672
R964 750 OHM, 0805, 1/10W, 1% 133625-7500
R965 15.4K, 0805, 1/10W, 1% 133625-1542
R966 121K, 0805, 1/10W, 1% 133625-1213
R967 1.00K, 0805, 1/10W, 1% 133625-1001
R968 4.99K, 0805, 1/10W, 1% 133625-4991
ELECTRICAL PARTS LIST
Main PCB Assembly
Resistors

12
Reference
Designator
Description Part Number Note
R969 JUMPER, CHIP, 0805 133627
R970 20.0K, 0805, 1/10W, 1% 133625-2002
R971 10.0K, 0805, 1/10W, 1% 133625-1002
R972 49.9K, 0805, 1/10W, 1% 133625-4992
R973 1.21K, 0805, 1/10W, 1% 133625-1211
R974 1.00K, 0805, 1/10W, 1% 133625-1001
R975 10.0K, 0805, 1/10W, 1% 133625-1002
R976 5.90K, 0805, 1/10W, 1% 133625-5901
R977 100 OHM, 0805, 1/10W, 1% 133625-1000
R978 100K, 0805, 1/10W, 1% 133625-1003
R979 10.0K, 0805, 1/10W, 1% 133625-1002
R980 4.99K, 0805, 1/10W, 1% 133625-4991
R981 100K, 0805, 1/10W, 1% 133625-1003
R982 1.00K, 0805, 1/10W, 1% 133625-1001
R983 1.00K, 0805, 1/10W, 1% 133625-1001
R986 POTENTIOMETER, 10K, 1B, 20% 273741-001
R987 1.54K, 0805, 1/10W, 1% 133625-1541
ELECTRICAL PARTS LIST
Main PCB Assembly
Resistors

13
Reference
Designator
Description Part Number Note
C101 2.2uF, 1206, X7R, 10V, 20% 260361-2253
C102 .0068uF, BOX, 85C, 100V, 5% 137127-682
C103 .033uF, BOX, 85C, 63V, 5% 137127-333
C104 1000pF, 0805, COG, 50V, 5% 133622-102
C105 100 pF, 0805, COG, 50V, 5% 133622-101
C110 68pF, 0603, COG, 50V, 5% 188454-680
C111 68pF, 0603, COG, 50V, 5% 188454-680
C112 68pF, 0603, COG, 50V, 5% 188454-680
C125 .12uF, BOX, 85C, 50V, 5% 137127-124
C126 .12uF, BOX, 85C, 50V, 5% 137127-124
C127 .18uF, BOX, 85C, 50V, 5% 137127-184
C128 .01uF, BOX, 85C, 100V, 5% 137127-103
C129 .01uF, BOX, 85C, 100V, 5% 137127-103
C130 .0015uF, BOX, 85C, 100V, 5% 137127-152
C131 .0056uF, BOX, 85C, 100V, 5% 137127-562
C132 .12uF, BOX, 85C, 50V, 5% 137127-124
C133 .12uF, BOX, 85C, 50V, 5% 137127-124
C134 1000pF, 0805, COG, 50V, 5% 133622-102
C201 2.2uF, 1206, X7R, 10V, 20% 260361-2253
C202 .0068uF, BOX, 85C, 100V, 5% 137127-682
C203 .033uF, BOX, 85C, 63V, 5% 137127-333
C204 100 pF, 0805, COG, 50V, 5% 133622-101
C210 68pF, 0603, COG, 50V, 5% 188454-680
C225 .12uF, BOX, 85C, 50V, 5% 137127-124
C226 .12uF, BOX, 85C, 50V, 5% 137127-124
C227 .18uF, BOX, 85C, 50V, 5% 137127-184
C228 .01uF, BOX, 85C, 100V, 5% 137127-103
C229 .01uF, BOX, 85C, 100V, 5% 137127-103
C230 .0015uF, BOX, 85C, 100V, 5% 137127-152
C231 .0056uF, BOX, 85C, 100V, 5% 137127-562
C232 1000pF, 0805, COG, 50V, 5% 133622-102
C233 .12uF, BOX, 85C, 50V, 5% 137127-124
C234 .12uF, BOX, 85C, 50V, 5% 137127-124
C235 .1uF, 0805, X7R, 25V, 10% 181264-104
C236 10uF, EL, SMD, 105, 25V, 20% 255071-100E
C238 10uF, EL, SMD, 105, 25V, 20% 255071-100E
C239 .1uF, 0805, X7R, 25V, 10% 181264-104
C240 68pF, 0603, COG, 50V, 5% 188454-680
C241 68pF, 0603, COG, 50V, 5% 188454-680
C301 100 pF, 0805, COG, 50V, 5% 133622-101
C302 3300pF, 0805, X7R, 50V, 10% 133623-332
C303 100 pF, 0805, COG, 50V, 5% 133622-101
C305 3300pF, 0805, X7R, 50V, 10% 133623-332
C306 1uF, EL, SMD, 105C, 50V, 20% 255071-1R0H
C307 1uF, EL, SMD, 105C, 50V, 20% 255071-1R0H
ELECTRICAL PARTS LIST
Main PCB Assembly
Capacitors

14
Reference
Designator
Description Part Number Note
C307 1uF, EL, SMD, 105C, 50V, 20% 255071-1R0H
C308 100 pF, 0805, COG, 50V, 5% 133622-101
C309 .015uF, 0805, X7R, 50V, 10% 133623-153
C310 100 pF, 0805, COG, 50V, 5% 133622-101
C311 10uF, EL, SMD, 105C, 25V, 20% 255071-100E
C312 100 pF, 0805, COG, 50V, 5% 133622-101
C313 100uF, EL, SMD, 105C, 25V, 20% 255071-101E
C314 10uF, EL, SMD, 105C, 25V, 20% 255071-100E
C315 10uF, EL, SMD, 105C, 25V, 20% 255071-100E
C316 .1uF, 0805, X7R, 25V, 10% 181264-104
C317 .1uF, 0805, X7R, 25V, 10% 181264-104
C318 .1uF, 0805, X7R, 25V, 10% 181264-104
C319 .1uF, 0805, X7R, 25V, 10% 181264-104
C320 .47uF, 0805, X7R, 16V, 5% 196995-474
C321 .015uF, BOX, 85C, 100V, 5% 137127-153
C322 47uF, EL, SMD, 105, 25V, 20% 255071-470E
C324 .15uF, BOX, 85C, 50V, 5% 137127-154
C325 0.1uF, 0805, X7R, 50V, 10% 133623-104
C326 .01uF, 0805, X7R, 50V, 10% 133623-103
C327 .1uF, BOX, 85C, 50V, 5% 137127-104
C328 .01uF, 0805, X7R, 50V, 10% 133623-103
C329 .1uF, BOX, 85C, 50V, 5% 137127-104
C330 .01uF, 0805, X7R, 50V, 10% 133623-103
C331 .01uF, 0805, X7R, 50V, 10% 133623-103
C332 1000pF, 0805, COG, 50V, 5% 133622-102
C333 1000pF, 0805, X7R, 50V, 10% 133623-102
C334 1000pF, 0805, X7R, 50V, 10% 133623-102
C335 1000pF, 0805, X7R, 50V, 10% 133623-102
C336 1000pF, 0805, X7R, 50V, 10% 133623-102
C337 10uF, EL, SMD, 105C, 25V, 20% 255071-100E
C338 1000pF, 0805, COG, 50V, 5% 133622-102
C339 1000pF, 0805, COG, 50V, 5% 133622-102
C340 1000pF, 0805, COG, 50V, 5% 133622-102
C341 1000pF, 0805, COG, 50V, 5% 133622-102
C342 47uF, EL, SMD, 105C, 25V, 20% 255071-470E
C343 1000pF, 0805, COG, 50V, 5% 133622-102
C348 .01uF, 0805, X7R, 50V, 10% 133623-103
C349 .01uF, 0805, X7R, 50V, 10% 133623-103
C350 .01uF, 0805, X7R, 50V, 10% 133623-103
C351 .01uF, 0805, X7R, 50V, 10% 133623-103
C352 68pF, 0603, COG, 50V, 5% 188454-680
C353 68pF, 0603, COG, 50V, 5% 188454-680
C354 68pF, 0603, COG, 50V, 5% 188454-680
C355 68pF, 0603, COG, 50V, 5% 188454-680
C360 .01uF, 0805, X7R, 50V, 10% 133623-103
ELECTRICAL PARTS LIST
Main PCB Assembly
Capacitors (continued)

15
Reference
Designator
Description Part Number Note
C401 10uF, EL, SMD, 105C, 25V, 20% 255071-100E
C402 .01uF, 0805, X7R, 50V, 10% 133623-103
C403 .01uF, 0805, X7R, 50V, 10% 133623-103
C404 1000pF, 0805, COG, 50V, 5% 133622-102
C950 10uF, EL, SMD, 105C, 25V, 20% 255071-100E
C951 68pF, 0603, COG, 50V, 5% 188454-680
C952 68pF, 0603, COG, 50V, 5% 188454-680
C953 .12uF, BOX, 85C, 50V, 5% 137127-124
C954 .12uF, BOX, 85C, 50V, 5% 137127-124
C955 10uF, EL, SMD, 105, 25V, 20% 255071-100E
C956 .01uF, BOX, 85C, 100V, 5% 137127-103
C957 10uF, EL, SMD, 105, 25V, 20% 255071-100E
C959 1000pF, 0805, COG, 50V, 5% 133622-102
C960 .12uF, BOX, 85C, 50V, 5% 137127-124
C961 .12uF, BOX, 85C, 50V, 5% 137127-124
C962 .0015uF, BOX, 85C, 100V, 5% 137127-152
C963 1000pF, 0805, COG, 50V, 5% 133622-102
C964 1000pF, 0805, COG, 50V, 5% 133622-102
C965 1000pF, 0805, COG, 50V, 5% 133622-102
C966 1000pF, 0805, COG, 50V, 5% 133622-102
C968 .01uF, 0805, X7R, 50V, 10% 133623-103
C969 10uF, EL, SMD, 105C, 25V, 20% 255071-100E
C970 1uF, EL, SMD, 105C, 50V, 20% 255071-1R0H
C971 .47uF, BOX, 85C, 50V, 5% 137127-474
C977 68pF, 0603, COG, 50V, 5% 188454-680
C980 68pF, 0603, COG, 50V, 5% 188454-680
C983 68pF, 0603, COG, 50V, 5% 188454-680
C988 68pF, 0603, COG, 50V, 5% 188454-680
Reference
Designator
Description Part Number Note
L301 330 OHM, BEAD, FERRITE, 0805, 1.5A 267539-331
Reference
Designator
Description Part Number Note
D301 SOT-23, BAV 99 147239
D302 SOT-23, BAV 99 147239
D303 SOT-23, BAV 99 147239
D304 SOT-23, BAV 99 147239
D305 SOT-23, BAV 99 147239
D306 SOT-23, BAV 99 147239
ELECTRICAL PARTS LIST
Main PCB Assembly
Capacitors (continued)
Inductors
Diodes

16
Reference
Designator
Description Part Number Note
D401 DUAL, SOT-23, BAW56 180738
D402 DUAL, SOT-23, BAW56 180738
D403 SOT-23, BAV 99 147239
D951 SOT-23, BAV 70 147249
D952 SOT-23, BAV 99 147239
D954 DUAL, SOT-23, BAW56 180738
D955 SOT-23, BAV 99 147239
ZR301 ZEN,SOD-123, .5W, 10V, 5% 174265-5240
Reference
Designator
Description Part Number Note
Q303 NPN, 1.3W, SOT-223 258416-001
Q304 BPLR, P, 40V, 200mA, SOT23 148596
Q305 BPLR, N, 40V, 200mA, SOT23 146819
Q306 BPLR, P, 40V, 200mA, SOT23 148596
Q307 BPLR, P, 40V, 200mA, SOT23 148596
Q308 BPLR, N, 40V, 200mA, SOT23 146819
Q309 BPLR, N, 40V, 200mA, SOT23 146819
Q401 BPLR, N, 40V, 200mA, SOT23 146819
Q402 BPLR, P, 40V, 200mA, SOT23 148596
Q403 BPLR, P, 40V, 200mA, SOT23 148596
Q950 BPLR, N, 40V, 200mA, SOT23 146819
Q951 BPLR, P, 40V, 200mA, SOT23 148596
Q952 BPLR, P, 40V, 200mA, SOT23 148596
Q953 BPLR, N, 40V, 200mA, SOT23 146819
Q954 BPLR, P, 40V, 200mA, SOT23 148596
Reference
Designator
Description Part Number Note
U3 IC, 0P AMP QUAD, SOIC-14, NJM2059 187472
U102 IC, 0P AMP QUAD, SOIC-14, NJM2059 187472
U125 IC, 0P AMP QUAD, SOIC-14, NJM2059 187472
U201 IC, 0P AMP QUAD, SOIC-14, NJM2059 187472
U301 IC, POWER AMP, 4x45W, 25-PIN, TDA7560 271833-001
U401 IC, TRANS, DUAL, SOIC-16, NJM13700 188650-001
U950 IC, TRANS, DUAL, SOIC-16, NJM13700 188650-001
U951 IC, 0P AMP QUAD, SOIC-14, NJM2059 187472
ELECTRICAL PARTS LIST
Main PCB Assembly
Diodes (continued)
Integrated Circuits
Transistors

17
Reference
Designator
Description Part Number Note
J301 CONN, HEADER, 3 POS, .156 133220-03
J302 CONN, JACK PHONE, 3.5MM 269841-001
J305 CONN, HEADER, INLINE, PCB MNT, 4P 133220-04
J307 CONN, RCA, DUAL, PC MOUNT 272376-001
J308 CONN, MINI DIN, R/A, 9-PIN 273227-001
ELECTRICAL PARTS LIST
Main PCB Assembly
Miscellaneous

18
Reference
Designator
Description Part Number Note
R01 10.0 OHM, 0805, 1/10W, 1% 133625-10R0
R02 10.0 OHM, 0805, 1/10W, 1% 133625-10R0
R03 10.0 OHM, 0805, 1/10W, 1% 133625-10R0
R04 10.0 OHM, 0805, 1/10W, 1% 133625-10R0
R05 2.00K, 0805, 1/10W, 1% 133625-2001
R06 10.0 OHM, 0805, 1/10W, 1% 133625-10R0
R07 412 OHMS, 0805, 1/10W, 1% 133625-4120
R08 JUMPER, CHIP, 0805 133627
R09 412 OHMS, 0805, 1/10W, 1% 133625-4120
R10 JUMPER, CHIP, 0805 133627
R11 10.0 OHM, 0805, 1/10W, 1% 133625-10R0
RT1 22K, THERMISTOR, RADIAL, 1/4W, 5% 177557 3
RT2 22K, THERMISTOR, RADIAL, 1/4W, 5% 177557 3
VR1 VARISTOR, MET OX, 275V, 140JOULE,
US
273545-001 3
VR1 VARISTOR, MET OX, 300V, 140JOULE,
EURO
273545-002 3
VR1 VARISTOR, MET OX, 175V, 140JOULE,
JAPAN
273545-003 3
Reference
Designator
Description Part Number Note
C1 1.0uF, BOX, 85, 100V, 5% 137127-105
C2 .22uF, 0805, X7R, 25V, 10% 181264-224
C3 .047uF, 0805, X7R, 50V, 10% 133623-473
C4 .1uF, 0805, X7R, 10%, 25V 181264-104
C5 .1uF, 0805, X7R, 10%, 25V 181264-104
C7 .033F, EL, AL, 25V, 4T, US 260693-3331E
C7 .039F, EL, AL, 25V, 20% EURO 260693-3931E
C7 .039F, EL, AL, 25V, 20%, JAPAN 260693-3931E
C8 .22uF, FILM, X2, 275VAC, 15MM 268166-224B
Reference
Designator
Description Part Number Note
L1 CHOKE, COMMON MODE, WITH HEADER 277667-001
ELECTRICAL PARTS LIST
Power Supply PCB Assembly
Resistors
Capacitors
Inductors

19
Reference
Designator
Description Part Number Note
BR1 RECTIFIER, BRIDGE, 8A, 400V 260684-400
D1 13V, ZEN, SOD-123, .5W, 5% 174265-5243
D2 SOT-23, BAV 99 147239
Reference
Designator
Description Part Number Note
Q1 BPLR, P, 40V, 200mA, SOT23 148596
Q2 BPLR, P, 40V, 200mA, SOT23 148596
Q3 MFET, N, 55V, TO-220FP 257359-001
Q4 BPLR, P, 40V, 200mA, SOT23 148596
Q5 BPLR, P, 40V, 200mA, SOT23 148596
Reference
Designator
Description Part Number Note
F1 FUSE, 4.0A, 125V, .60X.19, SLOBLO, US
FUSE, 3.15A, 250V, 5.5X21mm, SLO-BLO, US
135677-12
298780-3150 3
F1 FUSE, 2.0 AMPS, AXIAL, EURO 269855-02000 3
F1 FUSE, 4.0A, 125V, .60X.19, SLOBLO, JAPAN 135677-12 3
J1 CONN, HEADER, LOCKING, TOP ENTRY 193369-002 3
J2 CONN, HEADER, 3.96mm, 7-pin 272385-07 3
J3 CONN, HEADER, 3 POS, .156 133220-03 3
ELECTRICAL PARTS LIST
Power Supply PCB Assembly
Diodes
Transistors
Miscellaneous

20
Disassembly Procedures
Bass Module
1.1 Remove the knob from the unit.
1.2 Peel back the label and remove it.
Note: The label will become damaged
once removed from the rear panel. A
replacement label must be installed
during reassembly.
1.3 Remove the three silver Phillips-head
screws located on the right hand side (under
the label) and the five Phillips-head or T-15
Torx head screws around the heat sink fins.
1.4 Slide the electronic module back slightly.
1. Module Assembly Removal