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Summary of Contents for Bose OC-1
- Page 1 ® OC-1 AWCS-II Option Card Service Manual © 1994 Bose Corporation...
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Page 2: Table Of Contents
4. BLOCK DIAGRAM....................5. INSTALLATION INSTRUCTIONS................6. TEST PROCEDURES....................7. PARTS LIST ......................CAUTION: THE OC-1 OPTION CARD CONTAINS NO USER SER- VICEABLE PARTS. TO PREVENT WARRANTY INFRACTIONS, REFER SERVICING TO WARRANTY SERVICE STATIONS OR FACTORY SERVICE. PROPRIETARY INFORMATION THIS DOCUMENT CONTAINS PROPRIETARY INFORMATION OF ®... -
Page 3: Specifications
OC-1 SPECIFICATIONS Dimensions: .63" Hx1.29"Wx8.98"D(1.6x3.3x22.8 cm) Weight: .09 lbs. (.042 kg.) Input/Output: 2 audio inputs,Channel 1 and 2 high frequency outputs, bass channnel output Input Impedance: 482 kΩ (nominal) (feedback input) Output Level: 5.0 Vrms into 10 kΩ Crossover Frequency: 125 Hz,Roll-off slope: 24 dB/oct. -
Page 4: Theory Of Operation
THEORY OF OPERATION Overview ® The OC-1 is a small plug-in module for use with Bose 502™, 402™, and 802 II controllers. The OC-1 allows the use of the Cannon™ bass loudspeaker with these controllers and their loudspeakers. Refer to the block diagram, equalization curves and OC-1 schematic for further information. - Page 5 The mute circuit acts as a watchdog, and prevents the Cannon™ from operating unless the feedback signal from the Cannon is connected properly to the controller/OC-1 protection input. When the mute circuit detects that no audio has occurred for about two minutes, it reduces the gain in the low frequency path.
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Page 6: Eq Curves
Output is measured from U3 pin 7 or U6 pin 1. Controls are set at:: Mode 4 (Option), Output Mode: Normal, Low Frequency Level: 0 dB, and Input Level: +4 dB. Figure 1. High Frequency EQ Output is measured from U5 pin 14. Controls are set as in Figure 1. Figure 2. - Page 7 Output is measured from U5 pin 1. Controls are set as in Figure 1. Figure 3. EQA + EQB + EQC Output is measured from U5 pin 7. Controls are set as in Figure 1. Figure 4. EQA + EQB + EQC + EQD...
- Page 8 Output is measured from U3 pin 1. Controls are set as in Figure 1. Figure 5. EQA + EQB + EQC + EQD + VCA...
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Page 9: Block Diagram
Figure 6. OC-1 Block Diagram... -
Page 10: Installation Instructions
OC-1 Installation Procedures NOTE: The information included here is to aid the technician in setting up the OC-1 before doing any troubleshooting. These procedures are provided in more depth in the OC-1 Owner's Guide (P/N 176007). OC-1 Option Card Internal Protection... - Page 11 Flat side of barrel Figure 10. Internal Harness Connection E. Remove the lock nut and washer from the A. Turn the OC-1 PCB so that its component harness (Figure 10A). side faces you. F. Thread the harness through the rear B.
- Page 12 Figure 13. External Harness Connection C. Connect the harness's other end to the speaker terminals on your amplifier with either screw lugs (Figure 14A) or a banana plug (Figure 14B). Connect the red wire to the positive (+) terminal and the black wire to the negative (-) terminal. NOTE: Figure 15 shows a typical system hookup.
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Page 13: Test Procedures
OC-1 Test Procedures Test Setup • Output mode switch should be set at Input Connections: Connect an oscillator to the normal positive (+) and negative (-) input terminals for Channels 1 or 2. These procedures assume that the person performing these tests is using test •... - Page 14 – – – – – – ® COMMERCIAL SER. NO. D.O.M. BOSE CORPORATION, FRAMINGHAM, MA 01701-9168 CH 1 CH 2 CH 1 CH 2 SOUND CH 1 CH 2 ENGINEERED AND MANUFACTURED IN U.S.A. EQUIPMENT PROTECTED BY U.S. PATENT 3,038,964...
- Page 15 2. Frequency Response of LF Output 3. Protection Circuit Test A. Apply a 100 mVrms, 80 Hz signal to the NOTE: Refer to Figures 13 through 15 and the controller's input terminals and reference installation instructions for connecting the your dB meter to this frequency. external protection circuit harness.
- Page 16 Notes for Future Reference...
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Page 17: Parts List
OC-1 Option Card Parts List OC-1 Packaging Parts List (Figure 16) Item Description Part Number Qty. See Note Number Carton Cable Assembly 174147 Option Card PCB Assembly 145610 Bag-Antistatic 174138 Card-Owner's Registration 122157 Envelope 122785 Owner's Manual 176007 Carton 145618 NOTES 1. - Page 18 Option Card (2) Internal Protection Circuit Harness External Protection Circuit Harness Cable Assembly (1) Figure 16. Option Card and Cable Assembly...
- Page 19 OC-1 Electrical Parts List Resistors Reference Description Part Number See Note Designator R1-4 475 KΩ,1%,1/4W, 121245-2214753 52mm,MF R6,7,41,75,76 7.5 kΩ,1%, 133625-7501 1/10W,0805 100 Ω,1%, R8,39 133625-1000 1/10W,0805 R9,10,12,14 200 kΩ,5%, 133626-2045 1/10W,0805 R11,17 1 MΩ,5%,1/10W, 133626-1055 0805 R13,90,93 10 kΩ,1%,...
- Page 20 Resistors (Continued) Reference Description Part Number See Note Designator R52,58,64,65,69, Jumper-Chip,0805 133627 77,78,83,89,94 R54,62,63 14 kΩ,1%, 133625-1402 1/10W,0805 26.1 kΩ,1%, 133625-2612 1/10W,0805 178 kΩ,1%, 133625-1783 1/10W,0805 1.4 kΩ,1%,1/10W, 133625-1401 0805 255 kΩ,1%,1/10W, 133625-2553 0805 Diodes Reference Description Part Number See Note Designator D1,4 Zener,5%,18V,1W...
- Page 21 Capacitors Reference Description Part Number See Note Designator C1,2,57 3300 pF,10%,50V, 133623-332 X7R,0805 100 µF,20%,25V, 120767 105,Electrolytic 10 µF,20%,16V, C4,7,13,27,28 137126-100 105,Electrolytic .022 µF,10%, 50V, C5,6,8,9,18,19, 133623-223 23-26,38,39,59 X7R,0805 22 µF,20%,25V, 147522-220 BP,EL 1 µF,20%,50V, 137126-1R0 105,Electrolytic 100 pF,5%, 50V, 133622-101 Cog,0805 .047 µF,5%, 63V,...
- Page 22 SPECIFICATIONS AND FEATURES SUBJECT TO CHANGE WITHOUT NOTICE ® Bose Corporation The Mountain Framingham, Massachusetts USA 01701 P/N 174786 6/94: REV.0 FOR TECHNICAL ASSISTANCE OR PARTS ORDERING,CALL 800-367-4008...
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