Bose 802c User Manual

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®

®

802C System Controller

Original and SMD Version

Units with serial numbers beginning with 100000 are the original 802C's. Units with serial numbers beginning with 200000 are thenew SMD 802C's.

©1997 Bose CorporationService Manual

1

Part Number 129292 REV 03

 

 

Contents

 

Safety Information ............................................................................................................................

3

Electrostatic Discharge Sensitive (ESDS) Device Handling ........................................................

4

Specifications ...................................................................................................................................

5

Technical Description ......................................................................................................................

6

Disassembly/Assembly Procedures ..............................................................................................

7

Figure 1.

Locking Tab Screw Location .............................................................................................

7

Figure 2.

Original 802C PCB Exploded View ...................................................................................

8

Figure 3.

SMD 802C PCB Exploded View .......................................................................................

8

Test Procedures ..........................................................................................................................

9-10

Part List Notes ................................................................................................................................

11

Main Part List ..................................................................................................................................

12

Figure 4. Main Parts Exploded View ..............................................................................................

13

Electrical Part List .....................................................................................................................

14-17

Voltage Conversion Instructions ..................................................................................................

18

Figure 5. Voltage Conversion Diagram ..........................................................................................

18

Figure 6.

Top Cover Connection Diagram ......................................................................................

19

2

SAFETY INFORMATION

1. Parts that have special safety characteristics are identified by the

 

 

symbol on

 

 

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-Withthe 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 American National Standards Institute (ANSI) C101.1 “Leakage Current for Appliances” and Underwriters Laboratories (UL) 1492 (71). With the unit AC switch first in the ON position, then in the OFF position, measure from a known earth ground (metal water pipe, conduit, etc.) to all exposed metal parts of the unit (antennas, handle bracket, metal cabinet, 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 outlet and repeat 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 the exposed metallic part has a return path to the chassis, the reading should be between 1 and 5.2 Megohms. When there is no return path to the chassis, the reading must be “infinite”. If it is not within the limits specified, there is the possibility of a shock hazard, and the unit must be repaired and rechecked before it is returned to the customer.

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.

3

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.

CAUTION: THE 802® C SYSTEM CONTROLLER CONTAINS NOUSER-SERVICEABLEPARTS. TO PREVENT WARRANTY INFRACTIONS, REFER SERVICING TO WARRANTY SERVICE STATIONS OR FACTORY SERVICE.

4

 

 

SPECIFICATIONS

Input Connections:

 

 

 

One (1) balanced female XLR connector

 

 

(per channel)

 

 

 

One (1) unbalanced 1/4" phone jack

Output Connections:

 

 

 

Two (2) 1/4" phone jacks per channel

(per channel)

 

 

 

(outputs used depend upon mode selected)

Input Impedance:

 

 

 

Balanced input, 4kΩ

 

 

 

 

Unbalanced input, 42kΩ

Electronic Crossover

 

 

 

 

Frequency:

 

 

 

180Hz (bi-amplifiedmode only)

Maximum Output Level:

 

 

 

4 Volts (+12dB into 600Ω, 50Hz-16kHz)

Total Harmonic Distortion:

 

 

 

Less than .02% at 1 Volt (0dB)

 

 

 

 

Less than .2% at 8 Volts (18dB)

Output Noise:

 

 

 

Less than 20uV (-9dBV)A-weighted

Power Requirements:

 

 

 

120 Vac, 50-60Hz,3.5 Watts

 

 

 

 

220 Vac, 50-60Hz,(European)

 

 

 

 

100 Vac, 50-60Hz,(Japan)

Dimensions:

 

 

 

1 3/4"H x 10" W x 5" D

 

 

 

 

(4.4 x 25.4 x 12.7 cm)

Weight:

 

 

 

1.97 lbs (.895 kg)

5

TECHNICAL DESCRIPTION

The 802® C System Controller is a sophisticated signal processing device which combines the functions of three equalizers, an automatic switching circuit, and an electronic crossover. The 802C system controller automatically selects the proper crossover function and equalization curve for a given system application through use of a switching network operating in conjunction with the unit's output jacks. In addition to signal routing based on equalization requirements, the switching network indicates mode of operation on its front panel. The front panel also includeshigh-cutandlow-cutswitches which decrease line output by 4dB at 55Hz and by 10dB at 16kHz. Sharp subsonic and ultrasonicband-limitingfilters reduce power waste, stage noise,high-frequencyinstability, and interference. The 802C system controller retains the compact dimensions of its predecessor, the Bose® 802E active equalizer, and fits into one space of a standard 19" equipment rack with the optionalRMK-8Rack Mount Kit.

In an on-goingprocess of manufacturing updates, as technology permits, Bose Corporation has begun using SMD (surface mount devices) components on its 802C controller. The new SMD components are such a space saving feature that this new version permits us to eliminate the"piggy-back"PCB and place all electronics on one single printed circuit board. This manual will identify the different procedures, PCB layouts, and components where necessary.

There is no difference in the operation or function between the original 802C and the 802C SMD units.

6

DISASSEMBLY/ASSEMBLY PROCEDURES

Note: Refer to the Figures (2 and 3) for the following procedures.

1.Top Cover Removal

1.1Remove the four screws (two located at the rear of the unit and one located on each side of the unit) that secure the top cover to the chassis.

1.2Lift the rear of the top cover slightly and slide it forward until the front of the top cover is clear of the switches.

2.Top Cover Replacement

2.1Align the front of the top cover with the switches and LED's and slide the cover into place.

2.2Secure the top cover into place.

3.302EQ ("piggy-back")PCB Removal

Note: The original 802C has two PCB's. The following procedure will discuss the removal of the"piggy-back"PCB.

Note: The"piggy-back"PCB does not need to be removed when removing the main PCB.

3.1Perform procedure 1.

3.2Locate the four plastic stand-offs(three are located in the corners of the PCB and one is located between C125 and C225).

3.3With small needle-nosepliers, squeeze the retaining tab of eachstand-offwhile gently lifting up on the PCB to release the lock. Grasp the PCB at the middle of each side and lift the PCB off of the connectors.

4.302EQ ("piggy-back")PCB Replacement

4.1Replace the "piggy-back"PCB (on the original 802C controller) by placing the board over the connectors and pushing the board down onto thestand-offs.

4.2Perform procedure 2.

5.Main PCB Removal

5.1Perform procedure 1.

5.2Remove the 6 knurled nuts securing the input and output jacks to the chassis.

5.3Remove the 5 screws that secure the main PCB to the chassis.

5.4On the rear of the unit, at the XLR jacks there is a small hole with a locking screw inside (see Figure 1). Insert a small flathead screwdriver into the hole and rotate the locking screw 1/8 turn counterclockwise to release the locking tab.

5.5Lift the front of the PCB up slightly. Gently pull the PCB out while pushing on the center of the XLR jacks.

6.Main PCB Replacement

6.1Carefully slide the PCB into the chassis while aligning the XLR jacks into their housing.

6.2Lock the XLR jacks into place by inserting a small screwdriver into the small hole in the XLR jack and rotate the screw clockwise 1/8 turn.

6.3Replace the 5 screws that hold the PCB into place in the chassis.

6.4Perform procedure 2.

Figure 1. Locking Tab Screw Location

7

Figure 2. Original 802C PCB Exploded View

Figure 3. SMD 802C PCB Exploded View

8

TEST PROCEDURES

1.Mode Indicator Test

1.1Depending on the output jack configuration (see top cover diagram on page 17), equalization curves and output vary. You must test all modes of the 802C to assure proper operation.

1.2Perform the test below to verify that the mode select operation is working properly.

Note: You can insert one or both of the output jacks into the unit for this test.

LED Indicator Status

Output

802

Passive

Bi-

Jacks

Full

2-Way

AMP

Inserted

Range

 

 

No Jacks

On

Off

Off

Inserted

 

 

 

Inserted into

On

Off

Off

802 AMP

 

 

 

Inserted into

Off

On

Off

302 AMP

 

 

 

Inserted into

Off

Off

On

802 and 302

 

 

 

AMP

 

 

 

2.802 Full Range Frequency Response

2.1Apply a 750Hz, 500mVrms signal to the input of the 802C.

2.2Reference a dB meter to the 802 AMP output jacks.

2.3Refer to the frequency response table below and verify the response of the unit.

Full Range Frequence Response Table

Frequency

Output

Tolerance

55Hz

+14.0dB

± 1.5dB

30Hz

0dB

± 2.5dB

250Hz

+2.7dB

± 1.2dB

750Hz

0dB

-

 

(reference)

 

3kHz

+2.3dB

± 1.5dB

7.5kHz

+12.0dB

± 1.5dB

15kHz

+16.9dB

± 1.8dB

Note: Set both the Lo and Hi cut switches IN for the following response table.

Lo and Hi Cut Switch Response Table

Frequency

Output

Tolerance

55Hz

+9.3dB

± 1.8dB

750Hz

0dB

-

 

(reference)

 

15kHz

+6.9dB

± 2.0dB

3.302 Passive Frequency Response

3.1Apply a 750Hz, 500mVrms signal to the input of the 802C.

3.2Reference a dB meter to the 302 AMP output jacks.

3.3Refer to the frequency response table below and verify the response of the unit.

Passive Frequency Response Table

Frequency

Output

Tolerance

30Hz

-8.8dB

± 2.5dB

55Hz

+6.2dB

± 1.5dB

150Hz

-3.2dB

± 1.5dB

250Hz

+3.2dB

± 1.8dB

750Hz

0 dB

-

 

(reference)

 

3kHz

0.9dB

± 1.5dB

15kHz

+15.3dB

± 1.8dB

4. Bi-AmpFrequency Response

Note: This test is performed with both the 802 AMP and the 302 AMP output jacks used at the same time.

4.1Apply a 750Hz, 500mVrms signal to the input of the 802C.

4.2Reference a dB meter to the 802 AMP output jacks (while in the Bi-Ampmode).

4.3Refer to the frequency response table below and verify the response of the unit.

802 Bi-AmpFrequency Response Table

Frequency

Output

Tolerance

55Hz

-20.1dB

± 2.5dB

230Hz

+2.6dB

± 1.8dB

750Hz

0 dB

-

 

(reference)

 

15kHz

+17.0dB

± 1.8dB

9

TEST PROCEDURES

4.4Apply a 100Hz, 500mVrms signal to the input of the 802C.

4.5Reference a dB meter to the 302 AMP output jacks (while in the Bi-Ampmode).

4.6Refer to the frequency response table below and verify the response of the unit.

302 Bi-AmpFrequency Response Table

Frequency

Output

Tolerance

55Hz

+3.7dB

± 1.5dB

100Hz

0dB

-

 

(reference)

 

230Hz

-8.3dB

± 1.5dB

750Hz

-25.8dB

± 2.5dB

5. Distortion Test

Note: Total harmonic distortion must be measured in all modes to assure proper operation.

5.1Apply a 750Hz, 5Vrms signal to the input of the 802C.

5.2Refer to the table below for the distortion specification for the corresponding mode being tested.

Note: For theBi-Amp302 reading the input signal should be a 100Hz, 5Vrms signal.

Distortion Table

Output

Frequency.

Distortion

802 Full

750Hz

<0.1%

Range

 

 

302 Passive

750Hz

<0.1%

802 Bi-Amp

750Hz

<0.1%

302 Bi-Amp

100Hz

<0.1%

6.Noise Test

6.1All noise measurements are ANSI A-weightedtrue rms, with the inputs shorted.

6.2Refer to the table below for the proper noise levels.

Noise Table

Output

Noise

802 Full

<20uV

Range

 

302 Passive

<20uV

802 Bi-Amp

<20uV

302 Bi-Amp

<10uV

10

PART LIST NOTES

1.This part is not normally available from Customer Service. Approval from the Field Service Manager is required before ordering.

2.The individual parts located on the PCB are listed in the 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.RC-4156is to be usedONLY as a replacement for U5 and U6. This replaces the selectedLS-404IC previously used in these locations. Due to the higher current needs of theRC-4156,DAMAGE could occur to the power supply if this IC is used in other locations on the PCB.

5.This part is used on the 220V variation only.

11

MAIN PART LIST

(See Figure 4)

Item

Description

Part

Note

 

 

Number

 

Number

 

 

 

 

 

 

1

COVER

135040

 

 

 

 

 

 

2

CHASSIS

133230

1

 

 

 

3

FEET

103593

 

 

 

 

 

 

4

SCREW, SHEET METAL,

103118-04

 

 

 

 

 

 

 

4-40x .25L

 

 

 

 

 

 

 

5

CONNECTOR, XLR

121810

 

 

 

 

 

 

6

NUT, KNURLED

121890

 

 

 

 

 

 

7

STRAIN RELIEF BUSHING

106346

 

 

 

 

 

 

8

LINE CORD, 100/120V

111672

3

 

 

 

 

LINE CORD, 220V

113608

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

9

LED

123487

 

 

 

 

 

 

10

BRACKET, LED

120975

 

 

 

 

 

 

11

SMD PCB ASSEMBLY

-

1

 

 

 

12

SWITCH, KNOB

120989

 

 

 

 

 

 

13

SWITCH, DUAL

107461

 

 

 

 

 

 

14

SCREW, MACHINE, 4-40

103140-03

 

 

 

 

 

 

 

x .187L

 

 

 

 

 

 

 

15

STANDOFF

123199

1

 

 

 

16

PCB ASSEMBLY (TOP)

122068

 

 

 

 

 

 

17

PCB ASSEMBLY (MAIN)

-

1

 

 

 

-

CARTON

121860

 

 

 

 

 

 

-

FILLER

122640

 

 

 

 

 

 

-

POLY BAG

100688

 

 

 

 

 

 

-

ACCESSORY KIT

121783

 

 

 

 

 

 

-

MTG KIT (802 COVER)

123037

 

 

 

 

 

 

-

SWITCH, SLEEVE

120996

 

 

 

 

 

 

-

INSULATOR

122855

 

 

 

 

 

 

-

SCREW, MACHINE,

124843-12

5

 

 

 

 

NYLON,

 

 

 

 

 

 

 

 

6-32x .75L, 220V

 

 

 

 

 

 

 

-

SCREW, MACHINE,

128843-04

5

 

 

 

 

NYLON,

 

 

 

 

 

 

 

 

6-32x .25L, 220V

 

 

 

 

 

 

 

-

STANDOFF, HEX, 6 x

121828-06

5

 

 

 

 

.375L

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Reference

Description

Part Number

Note

 

 

Designator

 

 

 

 

 

 

 

 

J1, 3

CONNECTOR, XLR,

121823

 

 

 

 

 

 

 

INSERT

 

 

 

 

 

 

 

J2, 4-8

JACK, PHONE

121570

 

 

 

 

 

 

J9

WAFER, 7PIN, (2461)

123237-07

 

 

 

 

 

 

J9

CONNECTOR, 7PIN

121970-07

 

 

 

 

 

 

 

(21458)

 

 

 

 

 

 

 

J10

WAFER, 6PIN (2461)

123237-06

 

 

 

 

 

 

J10

CONNECTOR, 6PIN

121970-06

 

 

 

 

 

 

 

(21458)

 

 

 

 

 

 

 

P1, 2

TEMINAL, FASTON

111262

3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

T1

TRANSFORMER,

120993

3

 

 

 

 

110/220V

 

 

 

 

 

 

 

 

TRANSFORMER, 120V

121659-1

 

 

 

 

 

 

 

TRANSFORMER, 100V

121824

 

 

 

 

 

 

 

 

 

 

 

 

 

12

Figure 4. Main Parts Exploded View

13

ELECTRICAL PART LIST

Resistors

Reference

Description

Part

Note

 

Designator

 

Number

 

 

R1, 2

2.7kΩ, 1/4 Watt, 5%

117704-

 

 

 

 

1212725

 

 

R3, 4

3.3kΩ, 1/4 Watt, 5%

117704-

 

 

 

 

1213325

 

 

R5-7,11, 15, 118, 218

160kΩ, 1/4 Watt, 5%

117704-

 

 

 

 

1211645

 

 

R8, 9, 12, 13, 16, 17, 101, 210, 104,

330kΩ, 1/4 Watt, 5%

117704-

 

 

204

 

1213345

 

 

R10, 14, 18

8.2kΩ, 1/2 Watt, 5%

122071-8225

 

 

R102, 103, 105, 122, 124, 202, 203,

2.00kΩ, 1/4 Watt, 1%

119976-

 

 

205, 222, 224

 

2212001

 

 

R106, 206

1.9kΩ, 1/4 Watt, 1%

119976-

 

 

 

 

2211911

 

 

R107, 207

48.7kΩ, 1/4 Watt, 1%

119976-

 

 

 

 

2214872

 

 

R108, 208

20kΩ, 1/4 Watt, 5%

117704-

 

 

 

 

1212035

 

 

R109, 126, 130, 131, 209, 226, 230,

23.7kΩ, 1/4 Watt, 1%

119976-

 

 

231

 

2212372

 

 

R110, 210

2.74kΩ, 1/4 Watt, 1%

119976-

 

 

 

 

2212741

 

 

R111, 113, 211, 213

1kΩ, 1/4 Watt, 5%

117704-

 

 

 

 

1211025

 

 

R112, 146, 152, 212, 246, 252

4.75kΩ, 1/4 Watt, 1%

119976-

 

 

 

 

2214751

 

 

R114, 214

13kΩ, 1/4 Watt, 2%

117704-

 

 

 

 

1211332

 

 

R115, 215

10kΩ, 1/4 Watt, 5%

117704-

 

 

 

 

1211035

 

 

R116, 125, 216, 225

8.2kΩ, 1/4 Watt, 2%

117704-

 

 

 

 

1218222

 

 

R117, 128, 129, 133, 134, 217, 228,

6.81kΩ, 1/4 Watt, 1%

119976-

 

 

229, 233, 234

 

2216811

 

 

R119, 120, 219, 220

18kΩ, 1/4 Watt, 5%

117704-

 

 

 

 

1211835

 

 

R121, 136, 221, 236

22kΩ, 1/4 Watt, 5%

117704-

 

 

 

 

1212235

 

 

R123, 223

470Ω, 1/4 Watt, 5%

117704-

 

 

 

 

1214715

 

 

R127, 227

130kΩ, 1/4 Watt, 5%

117704-

 

 

 

 

1211345

 

 

R132, 141, 145, 153-158,232, 241,

6.04kΩ, 1/2 Watt, 1%

119976-

 

 

245, 253-258

 

2216041

 

 

R135, 159, 235, 259

510Ω, 1/4 Watt, 5%

122071-5115

 

 

R137, 237

47.5kΩ, 1/4 Watt, 1%

119976-

 

 

 

 

1214752

 

 

R138, 140, 238, 240

15.0kΩ, 1/4 Watt, 1%

119976-

 

 

 

 

2211502

 

 

R142, 242

3.0kΩ, 1/4 Watt, 1%

119976-

 

 

 

 

2213011

 

 

R143, 243

33kΩ, 1/4 Watt, 5%

117704-

 

 

 

 

1213335

 

 

14

ELECTRICAL PART LIST

Resistors (continued)

Reference

Description

Part

Note

 

Designator

 

Number

 

 

R144, 244

56kΩ, 1/4 Watt, 2%

117704-

 

 

 

 

1215632

 

 

R148, 248

4.12kΩ, 1/4 Watt, 1%

119976-

 

 

 

 

2214121

 

 

R149, 249

23.7kΩ, 1/4 Watt, 1%

119976-

 

 

 

 

2212372

 

 

R150, 250

30.9kΩ, 1/4 Watt, 1%

119976-

 

 

 

 

2213092

 

 

R160, 260

22kΩ, 1/4 Watt, 5%

117704-

 

 

 

 

1212235

 

 

SMD Resistors

Reference

Description

Part

Note

 

Designator

 

Number

 

 

R1, 2

2.7kΩ, CHIP, 5%

124895-2725

 

 

R3, 4

3.3kΩ, CHIP, 5%

124895-3325

 

 

R5, 6, 7, 11, 15, 118, 218

160kΩ, CHIP, 5%

124895-1645

 

 

R8, 9, 12, 13, 16, 101, 104

330kΩ, CHIP, 5%

124895-3345

 

 

R102, 103, 105, 111, 122, 124, 202,

2.00kΩ, CHIP, 1%

124894-2001

 

 

203, 205, 211, 222, 224

 

 

 

 

R106, 206

1,91kΩ, CHIP, 1%

124894-1911

 

 

R107, 207

48.7kΩ, CHIP, 1%

124894-4872

 

 

R108, 208

20kΩ, CHIP, 5%

124895-2035

 

 

R109, 126, 130, 131, 209, 226, 230,

23.7kΩ, CHIP, 1%

124894-2372

 

 

231

 

 

 

 

R110, 210

2.74kΩ, CHIP, 1%

124894-2741

 

 

R112, 114, 212, 214

13.3kΩ, CHIP, 1%

124894-1332

 

 

R113, 213

1kΩ, CHIP, 5%

124895-1025

 

 

R115, 215

10kΩ, CHIP, 5%

124895-1035

 

 

R116, 125, 139, 152, 216, 225, 239,

8.25kΩ, CHIP, 1%

124894-8251

 

 

252

 

 

 

 

R117, 128, 129, 133, 134, 217, 228,

6.81kΩ, CHIP, 1%

124894-6811

 

 

229, 233, 234

 

 

 

 

R119, 120, 219, 220

18kΩ, CHIP, 5%

124895-1835

 

 

R121, 136, 160, 221, 236, 260

22kΩ, CHIP, 5%

124895-2235

 

 

R123, 223

470Ω, CHIP, 5%

124895-4715

 

 

R127, 227

130kΩ, CHIP, 5%

124895-1345

 

 

R132, 141, 145, 147, 151, 153-158,

6.04kΩ, CHIP, 1%

124894-6041

 

 

232, 241, 245, 247, 251, 253-258

 

 

 

 

R137, 237

47.5kΩ, CHIP, 1%

124894-4752

 

 

R142, 242

3.01kΩ, CHIP, 1%

124894-3011

 

 

R143, 149, 150, 234, 249, 250

33kΩ, CHIP, 5%

124895-3335

 

 

R144, 244

56.2kΩ, CHIP, 1%

124894-5622

 

 

R146, 246

4.75kΩ, CHIP, 1%

124894-4751

 

 

R164, 264

26.7kΩ, CHIP, 1%

124894-2672

 

 

15

ELECTRICAL PART LIST

Capacitors

Reference

Description

Part

Note

 

 

Designator

 

Number

 

 

 

 

C1

.0047uF, 220V

120993

3

 

 

 

.0047uF, 1.4KV, 100/120V

103447

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

C2, 3

.015uF, FILM

118091-153

 

 

 

 

C4

.01uF, CERAMIC DISC

119696-103

 

 

 

 

C5, 6

470uF, ELECTROLYTIC

110704

 

 

 

 

C7-10

1uF, ELECTROLYTIC

119942-1R0

 

 

 

 

C11-19,22

.1uF, CERAMIC DISC

117502

 

 

 

 

C101, 117, 125, 201, 217, 225

22uF, ELECTROLYTIC

119944-220

 

 

 

 

C102, 202

2.2uF, ELECTROLYTIC

119943-2R2

 

 

 

 

C103-105,203-205

.0068uF, FILM

118091-682

 

 

 

 

C106, 206

.33uF, FILM

123785-334

 

 

 

 

C107, 108, 121, 122, 207, 208, 221,

.1uF, FILM

118091-104

 

 

 

 

222

 

 

 

 

 

 

C109, 209

.0012uF, FILM

118091-122

 

 

 

 

C110, 126, 127, 210, 226, 227

470pF, CERAMIC DISC

119617-471

 

 

 

 

C111, 211

270pF, CERAMIC DISC

119617-271

 

 

 

 

C112, 113, 124, 212, 213, 224

.033uF, FILM

118091-333

 

 

 

 

C114, 214

.068uF, FILM

118091-683

 

 

 

 

C115, 116, 123, 215, 216, 223

.047uF, FILM

118091-473

 

 

 

 

C118, 119, 218, 219

.082uF, FILM

118091-823

 

 

 

 

C120, 220

.022uF, FILM

118091-223

 

 

 

 

 

SMD Capacitors

 

 

 

 

 

 

 

 

 

 

 

Reference

Description

Part

Note

 

 

Designator

 

Number

 

 

 

 

C4

.01uF, CERAMIC, CHIP

124959-103

 

 

 

 

C11-22

.1uF, CERAMIC, CHIP

124959-104

 

 

 

 

C110, 126, 127, 210, 226, 227

470pF, CERAMIC, CHIP,

124956-4712

 

 

 

 

 

10%

 

 

 

 

 

C111, 211

270pF, CERAMIC, CHIP,

124956-2742

 

 

 

 

 

10%

 

 

 

 

 

16

ELECTRICAL PART LIST

Diodes

Reference

Description

Part

Note

 

Designator

 

Number

 

 

 

D1-5

ZENER, 18V, 1W, IN4746A

116995-4746A

 

 

 

D1, 101, 104, 201-204

1N4148, DIODE

121501

 

 

 

Z1

BRIDGE RECTIFIER

112027

3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Transistors

Reference

 

Description

Part

Note

 

 

Designator

 

 

Number

 

 

 

Q1, 4, 5

 

TRANSISTOR NPN

117921

 

 

 

Q2, 3, 6

 

TRANSISTOR PNP

119168

 

 

 

 

Integrated Circuits

 

 

 

 

 

 

 

 

 

 

 

Reference

 

Description

Part

Note

 

 

Designator

 

 

Number

 

 

 

U1, 8, 9

 

QUAD OP AMP, LS-404

120535/192166

4

 

 

U2

 

VOLT REG, 78L15

121116-1

 

 

 

U3

 

VOLT REG, 79L15

121117-1

 

 

 

U4

 

QUAD NAND CD-4011

121854

 

 

 

U5, 6

 

QUAD OP AMP, RC4156

192166

4

 

 

U7, 10

 

QUAD AW. SW. CD4066

119837

 

 

 

17

VOLTAGE CONVERSION INSTRUCTIONS

Voltage Conversions are to be performed on Military units. However it is possible to convert a 110 Volt unit (by replacing the transformer) and a 220 Volt European unit.

1. 220 Volt to 110 Volt Conversion

Note: Conversions must be performed with the line cord disconnected from any power source. Refer to Figure 3 below for the following procedures. The jumpers listed in parentheses refer to theSMD units.

1.1Perform disassembly procedure 3, PCB removal.

1.2Locate jumper LK-31,(LK-35)in front of the power transformer (near the line cord), and remove it.

1.3Add jumpers LK-32(LK-42)andLK-33(LK-43).

For European 220 Volt units.

1.4Remove the 220 Volt line cord and replace it with a 110 Volt line cord. Make certain the line cord is properly installed in the strain relief.

1.5Perform assembly procedure 4, PCB replacement.

1.6Test the unit to confirm the voltage conversion was perform correctly.

1.7Remove the 220 Volt label on the rear of the unit.

2.110 Volt to 220 Volt Conversion

2.1Perform disassembly procedure 3, PCB removal.

2.2Remove the two jumpers LK-32(LK42) andLK-33(LK-43).

For units with a 110 Volt transformer.

2.2Remove the 110 Volt transformer and C1 capacitor, and install 220 Volt components (see the part list).

2.3Add jumper LK-31(LK-35).Line cord replacement is optional.

2.4Perform assembly procedure 4, PCB replacement.

2.5Test the unit to confirm the voltage conversion was perform correctly.

2.6Add a 220 Volt label on the rear of the unit just below the line cord.

220 Volt to 110 Volt Conversion

110 Volt to 220 Volt Conversion

Figure 5. Voltage Conversion Diagram

18

Figure 6. Top Cover Connection Diagram

19

SPECIFICATIONS AND FEATURES SUBJECT TO CHANGE WITHOUT NOTICE

®

®

Bose Corporation

The Mountain

Framingham Massachusetts USA 01701

P/N 129292 REV. 03 10/97 FOR TECHNICAL ASSISTANCE OR PART ORDERS, CALL 1-800-367-4008