Bose Companion3S2s SERVICE MANUAL

Page 1

Companion® 3 Series II Multimedia

Speaker System

Product Description

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.

Reference Number 297700-SM Rev. 05

Service Manual

Electronic copy only

Page 2

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

Warranty

The Bose® Companion® 3 series II MultiMedia Speaker System is covered by a 1-year, transferable

limited warranty.

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.

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.

Page 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, measure 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.) 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 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 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 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.

Page 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)

Control Pod: 2 1/2 “ D x 1 1/8” H

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

Satellites: Painted polymer finish

Bass Box: Slot ported

Bass Box Port Tuning: 45 Hz

2 1/2” H x 2 3/4” W x 2 3/8” D (6.14 x 6.86 x 6.03 cm)

(6.35 x 2.79 cm)

vinyl

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:

Maximum SPL: 100 dB (A weighted) pink

Output: Bass: 60 Watts Satellites: 18 Watts per channel

40 Hz to 15 kHz

noise signal

Page 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.

Page 6

Bass Module Assembly Exploded View

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) 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 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

- XFORMER, TORROID, 105W, 15VDC, 7A TRANSFORMER, TOROID, 100V, 60Hz TRANSFORMER, TOROID, 230V, 50Hz

*300905-001 *300905-003 *300905-002 *303939-112 *303939-122 *303939-132

300954-001 300954-002 300954-003

*307876-011 *307876-033 *307876-022

271818-001

N/A

277613-001

1 1 1

1 1

*Capacitor C7 on the new power supply board may need to be replaced, see Service Bulletin 271885-B4

Figure 1. Bass Module Assembly Exploded View

Page 7

Amplifier Module Assembly

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

*Capacitor C7 on the new power supply board may need to be replaced, see Service Bulletin 271885-B4

*307872-011 *307872-022 *307872-033

1 1 1

4 4 4

Figure 2. Amplifier Module Assembly

Page 8

(

Packaging Part List

Item

Number

1 FEET, CLEAR SATELLITE 178321-04 2 2 FEET, RUBBER, BRACKET 260465 1 3 PACKING EPS, FILLE R ( includes bo th top and bottom filler) 300908 -001 1 4 CONTROL POD, 5 CABLE, IN P UT , 3. 5M M , 6FT, BL K 271 994-001 1 6 LINE CORD, 100 V , BLK, JAPAN

LINE CORD, 120 V , BLK, US/CANA DA LINE CORD, 220 V , BLK, EURO LINE CORD, 230 V , BLK, UK LINE CORD, 240 V , BLK, AUS

7 BASS MODULE, ASSY, U S/CAN ADA, 120V (Ele ctrof oil Logo )

BASS MODULE, ASSY, EUR O, 230V (Ele ctrofoi l Lo go) BASS MODULE, ASSY, JA PAN, 100V (Ele ctrofoil Logo) BASS MODULE, ASSY, US/C ANAD A, 1 2 0V (Pad p rint Logo) BASS MODULE, ASSY, EUR O, 230V (Pad print Logo) BASS MODULE, ASSY, JAP AN, 100V (Padprint Logo)

Complete bass mod ule package, includes Amp Mod Assy)

8 SAT, AS SY (Electrofoil Logo)

SAT , ASSY (Padpr int Lo go )

single arr ay, includes speaker stand)

9 OWNERS GUI DE, 3 LANG, US/CANA DA

OWNERS GUIDE, 5 LANG, EURO OWNERS GUIDE, 5 LANG, AP

10 CARTON, RSC, PRINTED 300911-001 1

- CARTON KIT 300911-001K 1

*Capaci tor C7 on the new power su pply boa r d may n ee d to be replaced, se e Servic e Bulletin 2 71885-B4

NON-REPAIRABLE) 307874-002 1

Description Part

Number

264514-0 01 262814-0 01

148203 134725

284243-0 01 *300905-001 *300905-003 *300905-002 *303939-112 *303939-122 *303939-132

300766-0 01

303938-0 02

296583 296584 299450

Qty. Notes

1 3

Figure 3. Packaging Exploded View

Page 9

ELECTRICAL PARTS LIST

Main PCB Assembly

Resistors

Reference Designator

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

Description Part Number Note

Page 10

ELECTRICAL PARTS LIST

Main PCB Assembly

Resistors

Reference Designator

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

Description Part Number Note

Page 11

ELECTRICAL PARTS LIST

Main PCB Assembly

Resistors

Reference Designator

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

R359 1.1 OHM, SMD, FUSE, 1/10W, 5% 192349-1R1A

R360 1.1 OHM, SMD, FUSE, 1/10W, 5% 192349-1R1A

R361 1.1 OHM, SMD, FUSE, 1/10W, 5% 192349-1R1A

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

Description Part Number Note

Page 12

ELECTRICAL PARTS LIST

Main PCB Assembly

Resistors

Reference Designator

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

Description Part Number Note

Page 13

ELECTRICAL PARTS LIST

Main PCB Assembly

Capacitors

Reference Designator

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

Description Part Number Note

Page 14

ELECTRICAL PARTS LIST

Main PCB Assembly

Capacitors (continued)

Reference Designator

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

Description Part Number Note

Page 15

ELECTRICAL PARTS LIST

Main PCB Assembly

Capacitors (continued)

Reference Designator

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

Description Part Number Note

Inductors

Reference Designator

L301 330 OHM, BEAD, FERRITE, 0805, 1.5A 267539-331

Description Part Number Note

Diodes

Reference Designator

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

Description Part Number Note

Page 16

ELECTRICAL PARTS LIST

Main PCB Assembly

Diodes (continued)

Reference Designator

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

Description Part Number Note

Transistors

Reference Designator

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

Description Part Number Note

Integrated Circuits

Reference Designator

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

Description Part Number Note

Page 17

ELECTRICAL PARTS LIST

Main PCB Assembly

Miscellaneous

Reference Designator

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

Description Part Number Note

Page 18

ELECTRICAL PARTS LIST

Power Supply PCB Assembly

Resistors

Reference Designator

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

RT2 22K, THERMISTOR, RADIAL, 1/4W, 5% 177557

VR1 VARISTOR, MET OX, 275V, 140JOULE,

VR1 VARISTOR, MET OX, 300V, 140JOULE,

EURO

VR1 VARISTOR, MET OX, 175V, 140JOULE,

JAPAN

Description Part Number Note

273545-001

273545-002

273545-003

Capacitors

Reference Designator

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

Description Part Number Note

Inductors

Reference Designator

L1 CHOKE, COMMON MODE, WITH HEADER 277667-001

Description Part Number Note

Page 19

ELECTRICAL PARTS LIST

Power Supply PCB Assembly

Diodes

Reference Designator

BR1 RECTIFIER, BRIDGE, 8A, 400V 260684-400 D1 13V, ZEN, SOD-123, .5W, 5% 174265-5243 D2 SOT-23, BAV 99 147239

Description Part Number Note

Transistors

Reference Designator

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

Description Part Number Note

Miscellaneous

Reference Designator

F1 FUSE, 4.0A, 125V, .60X.19, SLOBLO, US

F1 FUSE, 2.0 AMPS, AXIAL, EURO 269855-02000

F1 FUSE, 4.0A, 125V, .60X.19, SLOBLO, JAPAN 135677-12

J1 CONN, HEADER, LOCKING, TOP ENTRY 193369-002

J2 CONN, HEADER, 3.96mm, 7-pin 272385-07

J3 CONN, HEADER, 3 POS, .156 133220-03

Description Part Number Note

135677-12

FUSE, 3.15A, 250V, 5.5X21mm, SLO-BLO, US

298780-3150

Page 20

Disassembly Procedures

1. Module Assembly Removal

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.

Bass Module

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.

Page 21

Disassembly Procedures

1.5 Disconnect the two connectors

shown and remove the module assembly.

Bass Module Cont.

Speaker Connector

Transformer Connector

1.6 Disconnect the two connectors on

the power supply PCB.

1.7 Remove the seven T-15 Torx screws shown, to remove the power supply PCB.

Note: The PCB is mounted on standoffs which will become loose when removing the screws.

Note: The main PCB is glued to the heat sink assembly however it can be repaired without having to remove it.

Power supply PCB

ConnectorMain PCB

Connector

Page 22

2. Power Transformer Removal

2.1 Remove the module assembly,

perform procedure 1.

2.2 Remove the bolt at the center of the power transformer.

2.3 Remove the transformer and shield-can from the bass box.

Disassembly Procedures

Bass Module Cont.

3. Woofer Removal

3.1 The Grille on the bass module is glued

into place. The woofer is not replaceable. Replace the bass box assembly if the woofer is defective.

Page 23

Test Procedures

Test Equipment required:

1. Audio Signal Generator

2. Oscilloscope

3. Digital Multimeter

Test Set up

Connect the satellites to the output jacks on the bass module. Connect the control pod to the DIN jack on the bass module. Connect a signal generator to the audio input cable and connect the cable to the input jack on the bass module.

1. Bass Module Air Leak test

1.1 Apply a 40 mVrms, 40 Hz signal to the input of the bass module.

1.2 Set the volume knob on the control pod to maximum (fully clockwise), and set the bass control to

the center detent (flat) position.

1.3 Listen carefully for air leaks along all glued joints, around the heat sink, connectors and at the woofer mounting location.

1.4 Repair any air leaks around the heat sink and connectors. Replace any bass module that has air leaks around the bass box or woofer mounting location.

2. Bass Module Sweep Test

2.1 Apply a 200 mVrms, 100 Hz signal to the input of the bass module.

2.2 Set the volume knob on the control pod to maximum (fully clockwise), and set the bass control to

the center detent (flat) position.

2.3 Listen carefully as you sweep the bass module from 100 Hz to 300 Hz, then from 300 Hz to 100 Hz.

2.4 Listen carefully for buzzes, rattles, or other extraneous noises from the woofer, cabinet, plastic trim parts, or heat sink. A slight whooshing sound from the port at approximately 45 Hz is acceptable.

2.5 Repair any noise heard from around the heat sink and connectors. Replace the bass module if it has noises from the woofer or cabinet area.

Page 24

Test Procedures

3. Bass Module Tone Control Test

3.1 Apply a 90 mVrms, 100 Hz signal to the input of the bass module.

3.2 Set the volume knob on the control pod to maximum (fully clockwise), and set the bass control to

the center detent (flat) position.

3.3 Rotate the tone control fully clockwise and counter clockwise.

3.4 Verify that the bass level cleanly increases and decreases in level.

4. Satellite Air Leak Test

4.1 Apply a 270mV, 200 Hz signal to the input of the bass module.

4.2 Set the volume knob on the control pod to maximum (fully clockwise), and set the bass control to

the center detent (flat) position.

4.3 Listen carefully for air leaks along edges of the satellite and near the grille where the Twiddler speaker is installed.

4.4 Replace any satellite that is defective.

5. Satellite Sweep Test

5.1 Apply a 270mV, 100 Hz signal to the input of the bass module.

5.2 Set the volume knob on the control pod to maximum (fully clockwise), and set the bass control to

the center detent (flat) position.

5.3 Sweep the satellite speakers from 100 Hz to 3 kHz then from 3 kHz to 100 Hz.

5.4 Listen carefully for buzzes, rattles, or other extraneous noises from the Twiddler™ speakers,

plastic satellite enclosure, grille, or internal wires.

5.5 Replace any satellite that is found to be defective.

Page 25

Test Procedures

6. Control Pod Functional Test

6.1 With the system completely set up, turn on the system using the power switch located on the bass

module.

6.2 Set the volume knob on the control pod to maximum (fully clockwise), and set the bass control to the center detent (flat) position.

6.3 Touch the center of the control pod . Verify that the LED turns from green to orange and orange to green with each touch.

6.4 Verify that the sound is muted and un-muted when the LED changes color and that there is no audible pop when switching from mute to un-mute.

6.5 Rotate the control pod ring, verify that the volume increases and decreases and that the ring moves smoothly.

6.6 Replace any control pod that is defective.

Page 26

Theory of Operation

The Companion® 3 Multimedia Speaker System is a 2.1 system designed to be used as a computer sound system.

The electronics contain signal processing circuitry and the amplifiers for the woofer and satellites. A 120 volt AC input, 14 volt DC power supply powers the electronics. The power supply is located on a separate PC board.

The signal processing electronics in the bass module include equalizers, bass summing, TrueSpace™ processing, level compression, to prevent clipping at high volume, and protection circuitry.

The crossover frequency between bass and satellites is 300 Hz. The system is rated at 60 watts to the woofer and 18 watts to each satellite. The bass box is tuned to 45 Hz.

The following is a detailed description of the circuitry on the power supply, amp board, and remote board.

1.0 Power Supply (refer to the schematic diagram 276769)

The power supply is located on the heat sink of the module and is the smaller PCB of the two. The 120 volt AC is received from the AC inlet jack and switch at J1. The AC is fused by the 4 amp F1 fuse. VR1 protects against high voltage surges. The 120 volts is sent out to the 15 VAC, 7 amp toroid transformer mounted to the interior of the bass box on J2. The 15 VAC secondary voltage comes back into the board on J2. The 15 VAC is converted to 15-20 volts DC by bridge rectifier BR1.

Q1, Q2 and Q3 form a pre-regulator to keep the DC output voltage at 14 VDC. The 13 volt zener D1 serves as a reference to Q1. When the input AC goes one diode drop above the zener voltage, Q1 turns on. This turns off Q2, allowing Q3 to turn off, which disconnects the input rectified AC from charging C7, the 3300 uF filter capacitor above 14 volts. This makes the voltage at C7 stay at about 14 volts. C2, C3 and C4 slow down the turn on of Q3 to reduce interference from this circuit to the amplifier.

When the rectified voltage is lower than 14 volts, Q1 turns off, turning on Q2 and then Q3, allowing C7 to charge whenever the ratified voltage from BR1 is above the voltage left on C7. The 14 VDC is sent to the amplifier board over J3.

RT1 is a 22K thermistor at room temperature. It is mounted on the heat sink between BR1 and Q3. It senses the system temperature and sends a signal to the main amp board to help reduce system gain when the heat sink is getting too hot.

2.0 Main Amplifier Board (refer the schematic diagram 276762)

On sheet 1 of 3, location (D8), is the A input. U3, (D7) buffers the inputs to be sent to the remote control through J308. The remote mixes the A with the B input, on the remote, and sends the signal back to the main PCB though J308. The control pod is further described in section 3.

Page 27

Theory of Operation

2.0 Main Amplifier Board (continued) (refer the schematic diagram 276762)

The signals coming into J308 (C7) are sent to sheet 3 of 3 (L_VOL and R_VOL). Three amplifiers in U201 (D8-4) are the equalizers for the right channel and U125, (A8-4) are the equalizers for the left channel. U951 (C8-3) in conjunction with U950 (C-2), the voltage controlled amplifier, form the bass summer and dynamic bass equalizer.

The three stage equalizers for the equalizer perform the bass cutoff, mid-range cut, and high end boost, in that order. They are 4-pole Salen-Key elliptical filters.

The bass signal is formed from the two inputs summed and low pass filtered by U951. The bass level is detected by U125, D951, D952, Q950, Q951 and Q952 (B-6) forming an active peak detector. C955 and C957 filter the detected peaks to form the control voltage for the VCA in U950. When the bass level is very low, the signal is boosted by U951. U950 is in the negative feedback path for U951, and when its gain is low, U951 gain goes up, boosting the bass. U950 gain goes down when control current generated by Q952 goes down, as controlled by peak detector circuit.

Q953, Q954 and D954 (D-2) form the peak detector on the bass outputs. Peaks near the negative rail are conducted through D954 and Q953 to charge C969. Voltage on C969 is converted to a current by Q954 which controls the VCA in U950. U950 is in the negative feedback loop of U951, so when U950 gain is high, less bass is output. Near clipping detected by the peak detector is converted to high current by Q954, causing high gain in U950, reducing the gain in U951 and less bass. R980 and C969 determine the attack time of the compressor, and R981 and C969 determine the release time.

Also on sheet 3 of 3, U201 (A-3) is the virtual ground generator. The 10 volt line is divided by two R225 and R226, filtered by C970 and C235, and input to U201. The 5 volts generated by U201 is used by all the signal processing circuitry as the virtual ground reference.

The right and left outputs, EQ_R and EQ_L are sent to page 2 of 3 (B3). U102 (B3) forms the true space processing and the satellite signal compressors. TrueSpace™ processing consists of U102B and U102D which act a low pass filters with a -3 dB point of 3 kHz. This signal is subtracted from the opposite channel signal by U102A and U102C.

R204 and R105 determine how much TrueSpace signal is subtracted. The 127K compared to the 10K value of the main signal inputs gives a TrueSpace signal of -18 dB relative to the main signal. To keep the levels the same in mono conditions, the same amount of low pass filtered signal is added back to the main channel of itself, through R106 and R206.

The satellite compressor consist of D401, D402, and Q401 (D7) which detect the right and left channel level, charging C401 when the R+, R-, L+ and L- signals get near the negative rail. The compressor attack time is determined by R403, and the release time is determined by R404. When C401 charges negatively, Q402 and Q403 convert this to current which increases the gain of U401A and U401B. U401 is in the negative feedback path of U102A and U102C, and higher gain reduces the gain through the satellite channels. Therefore, high signal levels near clipping reduces the gain of the satellite channels, compressing the signals.

The compressed signals are sent to the main amplifier on sheet 1 of 3 over signals Sat_Drv_L and Sat_Drv_R. The bass signal from the bass compressor on sheet 3 of 3, BASS_DRV, is sent to two stages of bass equalization at U3B and U3D (D7). These form the 40 - 50 Hz boost, and the 100 Hz cut for the bass box equalization.

Page 28

Theory of Operation

2.0 Main Amplifier Board (continued) (refer the schematic diagram 276762)

The two satellite signals, and the bass signal are sent to the power Amp IC, U301 (C3). One channel of the power Amp IC is used for each satellite, and the bass signal uses two channels of the power chip to drive both of the woofer voice coils.

The Amp IC can provide up to 40 watts into 2 ohms per channel. The woofer coils are 2 ohms each, and 60 watts total is specified for the woofer drive. Each satellite can receive 18 watts each into their 4 ohm impedance.

The mute signal from the remote unit comes in through J308, is slowed down by C314 to prevent pops.

The 10 volts for the signal processing circuitry is generated by D301, a 10 volt zener, and Q303 in an emitter follower configuration. Q303 is specified up to 500 ma, and the entire remote and signal processor consumes about 100 ma.

For thermal protection, Q304, Q305, and Q307 (A5) process the voltage generated by the thermistor on the power supply and R337 and generate a current that goes higher as the temperature rises. This current is summed into the three compressors, reducing the gain through the system at high temperatures. This prevents the heat sink from getting too hot. R337 determines the voltage division ratio and therefore the haet sink maximum temperature.

Q308 and Q309 (D5) form a voltage detector that determines when power has reached sufficient voltage for proper power amplifier operation. If the DC voltage falls below 10 volts, the power amplifier will be muted. This prevents power up and down pops.

3.0 Control Pod Remote (refer to schematic diagram 272092)

The remote receives the A input signal from the bass module over J4. This is summed with the B input on the remote control by U2. U2 drives the volume control pot R31. The adjusted volume is sent to U4 to drive the headphone outputs J5 and connector J4 back to the bass module. U1 buffers the 5 volts reference to the sleeve of J5. J5 is a switched jack, and the switch mutes the main speakers when a headphone plug is inserted. This grounds the mute signal, which is active low.

U3 is a touch sensor switch. When the operator touches the touch sensor pad on the remote, which is connected electrically to WT1 and WT2, the QT113 chip will sense this and toggle the standby line. This changes the LED (DS1) color from yellow to green. The green led is always on, and the red led glows during standby, as driven by Q1, to mix with the green to show yellow color. U3 output also drives the standby line to the bass module power amplifier. Standby is active high on the remote, and inverted in the bass module to the active low signal required by the power amplifier.

The remote amplifiers are powered by the 10 volt supply coming in at J4 from the bass module. The virtual ground from the bass module comes in as the VCCD2 signal reference from the signal processing. ZD1 is a 4.7 volt zener which generates the local power supply voltage from the 10 volt input. R41 is the current limiting resistor for ZR1. This 4.7 volts powers U3.

At each I/O connector, resistors, capacitors, diodes, and spark gaps are present on each signal to protect against RF emissions, susceptibility, and ESD.

Page 29

SERVICE MANUAL REVISION HIST OR Y

Date Revision

Level

9/06 00 Do c um ent released at 4/07 01

8/7 02 Part number changes

3// 08 03 Added fuse pa rt number

3//08 04 Deleted part number for

6/09 05 Del eted part number for

1/10 05 Changed part nu mb er

Description of Change Change Driven

revision 00 Added pad print ed logo part numbers for Bass module an d Sat ellites

Ne w part numbe r for po wer sup ply board – 30 7872-011 – 120V 30 7872-022 – 100V 30 7872-033 – 240V

Mod Assem bly 30 7876-011- 120V 30 7876-022- 100V 30 7876-033- 240V

Co ntrol Pod 307874-002

298780-3150

BOTTOM EPS FILLER.

178321-08 to 178321-04

Service Manual

Release

I m provemen t of

logo

Imp rov ed power

supply.

Imp rov ed power

sup p ly and Contro l

pod.

Tw o v er s ions of

the Power PCB,

need two versions

of th e fu se.

The top filler now

inc ludes bo th top

and bottom filler.

The top filler now

inc ludes bo th top

and bottom filler.

ECN 46966 8

Pages

Affected

All

5, 7

Page 30

SPECIFICATIONS AND FEATURES SUBJECT TO CHANGE WITHOUT NOTICE

Bose Corporation The Mountain Framingham Massachusetts USA 01701

P/N 297700-SM Rev. 05 09/2007 (H):

http://serviceops.bose.com

Page 31

Troubleshooting Tips

Companion® 3 Series II Multimedia Speaker System

Refer to the Companion® 3 Multimedia Speaker System service manuals, part number 297700 for schematics, PCB layouts and parts lists.

Preventative Repair Measures Note: Perform the following on all units returned for repair.

Product Check Action

Units built before 10/23/2007 (DOM 7289).

Companion 3 series II

Units built before 10/23/2007 will have the Aishi capacitor C7 installed on the power supply PCB. Replace C7 with a United Chemi-Con (UCC) capacitor. Refer to the service manual for the part number. The DOM cut-in date only applies to U.S. variants. Refer to Service Bulletin: further information.

271885-B4 for

Troubleshooting Tips

Product Symptom Check Action

Intermittent power Either J308 or the

control pod itself can be defective

Companion 3 series II

Intermittent power Check J1 Sometimes J1 is not seated

Companion 3 series II

No Audio Check U301 Check pins 6 and 20 for 15Vdc. If

Companion 3 series II

Use a test control pod to identify if the problem is with the customer's control pod or the connector J308. If the test control pod works, the problem can be identified as the customer having a defective control pod. If the control pod does not fix the problem, J308 is the failed component. J308 is not repairable. The module assembly would have to be replaced. Refer to the Service Manual for the module assembly part number.

properly and may become intermittent. If J1 is intermittent, the cable may need to be replaced or reseated.

the 15Vdc is not present, check all other power supply voltages. If the power supply voltages are present, inject a 1KHz signal into J302. Check pins 14 (right in) and 15 (left in) and then pins 17 (right out) and 21 (left out). If audio is coming in and nothing is going out, replace U301

Page 32

Troubleshooting Tips, continued

Product Symptom Check Action

Companion 3 series II

No Audio Make sure the unit isn't

stuck in standby

No Bass Check U3 Insert a 200 mVrms, 200Hz signal

Intermittent Audio from Left or Right Speakers

No Audio or Dead Unit

Check J307 With the speakers connected and

Check the Control Pod Check the pins inside the din

At IC U301, place your positive probe on pin 22 and the negative probe on ground. Toggle the control pod between mute and standby by touching the top of the control pod. When the LED is green, the voltmeter should read 11Vdc. When the LED is yellow, the voltmeter should read 0Vdc.

into J302. Check U3, pin 10 for a signal going into the IC and check pin 14 for the signal coming out. If there is a signal going in but nothing coming out, replace U3 using the part number in the Service Manual.

an audio source playing, wiggle the speaker connections and listen to see if the audio cuts out or becomes intermittent. Before determining the connectors as a failure, be sure to inspect the speaker cable for broken or intermittent connections. J302 is non-repairable; Replace the module assembly.

connector at the end of the control pod cable to see if any pins a misshaped, bent or broken. Also, inspect J308 to make sure none of the pins has broken off. If the control pod connector is defective, replace it.

Page 33

SERVICE BULLETIN

Component

From

Part Number

R336

2.2 Ohm

133625-2R25

10 Ohm

133625-10R0

Bulletin Part Number: 271885-B2

Product: Companion® 3 Multimedia Speaker System

Subject: No Audio Output

Disposition: All units in for repair with a no audio complaint.

Symptom: No audio output from the system and the control pod LED is dimly lit.

Reason: Q303 on the main PCB is defective or shorted completely.

Solution: Replace Q303 with part number 148770. Add a 1N4148 diode part number 121501 across the

base and emitter junction. Polarity is very important. Connect the cathode of the diode to the base and the anode to the emitter. Refer to the figures below for the location of Q303 and orientation of the diode. Also replace R336, as identified in the table below. Refer to the Companion 3 Speaker System service manual part number 271885-SM.

1N4148 Diode

Date: 09/04 FINS: 1569

Q303

J301

TP370 TP371

PGND

+15V

TP372 TP373

R308

1.00K

R336

TP378

2.2ohm

TP325 TP328

Add Diode

D301

13v

Q303

2SC4695

C311 10uF

AGND

+10V

C313 100uF

R313-NV

AGND

Bose Corporation; The Mountain, Framingham, Ma. 01701-9168

Service documentation available online at http://serviceops.bose.com

TP330

+10V

R337 402

R316 249

MMBT3906

Q304

R336

TP334

R317 249

TP377

MMBT3906

Q306

IABC1

R319 249

TP375TP376

MMBT3906

Q307

IABC2

IABC3

Page 34

SAFETY BULLETIN

Bulletin Part Number: 271885-SB3

Product: Companion

Subject: Possible failure of C316, C317, C318 and C319 on the main PCB assembly.

3 Multimedia Speaker System

Disposition: All Companion

Symptom: The four capacitors should be replaced regardless of symptom.

Reason: The capacitors C316, C317, C318 and C319 may crack due to flexing of the board. This can cause the

capacitors to have a low resistance and create a DC offset voltage on the output of the amplifier.

Solution: Replace C316, C317, C318 and C319 with a new type (Kemet open-mode ceramic) and value (0.1uF)

part number 286499-104. This change will prevent possible DC offset voltages due to a cracked capacitor. Refer to the Companion® 3 service manual part number 271885-SM for disassembly/assembly and test procedures. Verify proper operation before returning the system to the customer.

NOTE: There are two versions of the board, the original board is labeled with 271838 and present board is

labeled with 280066. Both versions need the four capacitors replaced with the new part number. The

two different versions are shown on Page 2 of this document.

3 Multimedia Speaker System built before 11/11/05 (DOM below 5315).

FINS: 2476, 2499 and 2619 FRACAS: 494

Date Issued: 10/05

U301

Location of C316, C317, C318 and C319 on Sheet 1 of SD280066 and SD271838

Bose Corporation; The Mountain, Framingham, Ma. 01701-9168

Service documentation available on-line at http://serviceops.bose.com

Page 1 of 2

Page 35

SAFETY BULLETIN

C316 and C318C317 and C319

Location of C316, C317, C318 and C319 on the bottom side of 280066-001 PCB

C317 and C319

C316 and C318

FINS: 2476, 2499 and 2619 FRACAS: 494

Date Issued: 10/05

Location of C316, C317, C318 and C319 on the bottom side of 271838-001 PCB

Bose Corporation; The Mountain, Framingham, Ma. 01701-9168

Service documentation available on-line at http://serviceops.bose.com

Page 2 of 2

Page 36

SERVICE BULLETIN

Bulletin Part Number: 271885-B4

Product: Companion

Subject: Poor reliability on vendor part

Disposition: On all units that come in for repair, replace C7 with a Chemi-Con capacitor

Symptom: No Audio, Dead Unit or No Symptom

Reason: The capacitor made by Aishi is made using a low quality foil and poor quality etching

Solution: All units that come in for repair, replace C7 using the part number listed in the table

3 Multimedia Speaker System

which is critical to the performance of an aluminum electrolytic capacitor. The capacitor made by United Chemi-Con (UCC) is more dense and has more uniform layering which makes the UCC capacitor more reliable.

below. For assembly/disassembly procedures, please refer to Service Manual 271885-SM (Companion (Companion® 3 Series II Multimedia Speaker System).

3 Multimedia Speaker System) or 297700-SM

Ref Des

Variant Description Part Number

US 33000 µF, EL, AL, 25V, 4T 260693-3331E

Euro/Japan 39000 µF, EL, AL, 25V 260693-3931E

Good Part Bad Part

FINS: 2784

Date: 11/07

United

Chemi-Con

Bose Corporation; The Mountain, Framingham, Ma. 01701-9168

Service documentation available online at http://serviceops.bose.com

Aishi