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Bose 802c - page 1
1 © 1997 Bose Corporation Part Number 129292 REV 03 Service Manual 802C System Controller Original and SMD V ersion ® ® Units with serial numbers beginning with 100000 are the original 802C's. Units with serial numbers beginning with 200000 are the new SMD 802C's. ...
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Bose 802c - page 2
2 Contents Safety Information ............................................................................................................................ 3 Electrostatic Discharge Sensitive (ESDS) Device Handling ........................................................ 4 Specifications .............................................................. ...
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Bose 802c - page 3
3 SAFETY INFORMA TION 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 in ...
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Bose 802c - page 4
4 DEVICE HANDLING ELECTROST A TIC DISCHARGE SENSITIVE (ESDS) This unit contains ESDS devices. W e recommend the following precautions when repairing, replacing or transporting ESDS devices: • Perform work at an electrically grounded work station. • W ear wrist straps that connect to the station or heel straps that connect to conductive floor ma ...
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Bose 802c - page 5
5 SPECIFICA TIONS Input C onnections: (per channel) O ne ( 1 ) balanced female XLR connector One (1) unbalanced 1/4" phone jack Output Connections: (per channel) Two (2) 1/4" phone jacks per channel (outputs used depend upon mode selected) Input Impedance: Balanced input, 4k Ω Unbalanced input, 42k Ω Electronic Crossover Frequency: 18 ...
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Bose 802c - page 6
6 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 n ...
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Bose 802c - page 7
7 DISASSEMBL Y/ASSEMBL Y PROCEDURES Figure 1. Locking T ab Screw Location Note: Refer to the Figures (2 and 3) for the following procedures. 1. T op Cover Removal 1.1 Remove 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. 1.2 Lift the rear of the top cover slig ...
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Bose 802c - page 8
Figure 2. Original 802C PCB Exploded Vi ew Figure 3. SMD 802C PCB Exploded Vi ew 8 ...
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Bose 802c - page 9
9 TEST PROCEDURES 4. Bi-Amp Frequency Response Note: This test is performed with both the 802 AMP and the 302 AMP output jacks used at the same time. 4.1 Apply a 750Hz, 500mV rms signal to the input of the 802C. 4.2 Reference a dB meter to the 802 AMP output jacks (while in the Bi-Amp mode). 4.3 Refer to the frequency response table below and verif ...
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Bose 802c - page 10
10 TEST PROCEDURES 4.4 Apply a 100Hz, 500mV rms signal to the input of the 802C. 4.5 Reference a dB meter to the 302 AMP output jacks (while in the Bi-Amp mode). 4.6 Refer to the frequency response table below and verify the response of the unit. 6. Noise T est 6.1 All noise measurements are ANSI A-weighted true rms, with the inputs shorted. 6.2 Re ...
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Bose 802c - page 11
11 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 rec ...
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Bose 802c - page 12
12 MAIN PART LIST Reference Designator Description Part Number Note J1, 3 CONNECTOR, XLR, INSERT 121823 J2, 4- 8 JACK, PHONE 121570 J 9 WAFER, 7PIN, (2461) 123237-07 J9 CONNECTOR, 7PIN (21458) 121970-07 J1 0 WAFER, 6PIN (2461) 123237-06 J10 CONNECTOR, 6PIN (21458) 121970-06 P1, 2 TEMINAL, FASTON 111262 3 T1 TRANSFORMER, 110/220V TRANSFORMER, 120V T ...
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Bose 802c - page 13
Figure 4. Main Parts Exploded View 13 ...
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Bose 802c - page 14
14 ELECTRICAL PART LIST Resistors Reference Designator Description Part Number Note R1, 2 2.7k Ω , 1/4 Watt, 5% 117704- 1212725 R3, 4 3.3k Ω , 1/4 Watt, 5% 117704- 1213325 R5-7, 11, 15, 118, 218 160k Ω , 1/4 Watt, 5% 117704- 1211645 R8, 9, 12, 13, 16, 17, 101, 210, 104, 204 330k Ω , 1/4 Watt, 5% 117704- 1213345 R10, 14, 18 8.2k Ω , 1/2 Wa ...
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Bose 802c - page 15
15 ELECTRICAL PART LIST Resistors (continued) Reference Designator Description Part Number Note R144, 244 56k Ω , 1/4 Watt, 2% 117704- 1215632 R148, 248 4.12k Ω , 1/4 Watt, 1% 119976- 2214121 R149, 249 23.7k Ω , 1/4 Watt, 1% 119976- 2212372 R150, 250 30.9k Ω , 1/4 Watt, 1% 119976- 2213092 R160, 260 22k Ω , 1/4 Watt, 5% 117704- 1212235 SMD ...
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Bose 802c - page 16
16 ELECTRICAL PART LIST Capacitors Reference Designator Description Part Number Note C 1 .0047uF, 220V .0047uF, 1.4KV, 100/120V 120993 103447 3 C2, 3 . 015uF, FILM 118091-153 C 4 .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, ...
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Bose 802c - page 17
17 ELECTRICAL PART LIST Diodes T ransistors Integrated Circuits Reference Designator Description Part Number Note U1, 8, 9 QUAD OP AMP, LS-404 120535/192166 4 U 2 VOLT REG, 78L15 121116-1 U 3 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 Reference Designator Description Par ...
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Bose 802c - page 18
18 VOL T AGE CONVERSION INSTRUCTIONS 220 V olt to 1 10 V olt Conversion 1 10 V olt to 220 V olt Conversion 1. 220 V olt to 1 10 V olt 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 the SMD units. 1. ...
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Bose 802c - page 19
Figure 6. T op Cover Connection Diagram 19 ...
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Bose 802c - page 20
SPECIFICA TIONS AND FEA TURES SUBJECT TO CHANGE WITHOUT NOTICE ® ® Bose Corporation The Mountain Framingham Massachusetts USA 01701 P/N 129292 REV . 03 10/97 FOR TECHNICAL ASSIST ANCE OR P AR T ORDERS, CALL 1-800-367-4008 ...
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