BOSE COMPANION 3 SERIES II SM R05 Schematic

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

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.

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.

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

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.

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

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

(

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

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

+ 21 hidden pages