©1994 Bose Corporation Service Manual®OC-1 AWCS-II Option Card
1. Installing the Internal Protection CircuitHarnessA. Turn the controller so that its rear panelfaces you. See Figure 8.B. Remove 4 phillips-head scr
10E. Remove the lock nut and washer from theharness (Figure 10A).F. Thread the harness through the rearpanel (white connector first).G. Turn the barre
11Figure 13. External Harness ConnectionC. Connect the harness's other end to the speaker terminals on your amplifier with either screwlugs (Figu
Test SetupInput Connections: Connect an oscillator to thepositive (+) and negative (-) input terminals forChannels 1 or 2. These procedures assume tha
0...+3-18SER. NO. D.O.M.CH 1INPUT LEVEL–10 +4INPUTCH 2INPUT LEVEL–10 +4MODE4123PROTECTED BY U.S. PATENT 3,038,964HIGH FREQ OUTPUTCH 1 CH 2LOW FREQ
2. Frequency Response of LF OutputA. Apply a 100 mVrms, 80 Hz signal to thecontroller's input terminals and referenceyour dB meter to this freque
Notes for Future Reference15
16OC-1 Option Card Parts ListItemNumberDescription Part Number Qty.PerCartonSee Note1 Cable Assembly 174147 1 12 Option Card PC
17Option Card (2)Cable Assembly (1)Internal ProtectionCircuit HarnessExternal ProtectionCircuit HarnessFigure 16. Option Card and Cable Assembly
18ResistorsOC-1 Electrical Parts ListReference DesignatorDescription Part Number See NoteR1-4 475 KΩ,1%,1/4W,52mm,MF121245-2214753R6,7,41,75,76 7.5 k
1TABLE OF CONTENTS1. SPECIFICATIONS... 22. THEOR
19Resistors (Continued)Reference DesignatorDescription Part Number See NoteR52,58,64,65,69,77,78,83,89,94Jumper-Chip,0805 133627R54,62,63 14 kΩ,1%,1/
20CapacitorsReference DesignatorDescription Part Number See NoteC1,2,57 3300 pF,10%,50V,X7R,0805 133623-332C3 100 µF,20%,25V, 105,Electrolytic
SPECIFICATIONS AND FEATURES SUBJECT TO CHANGE WITHOUT NOTICEBose CorporationThe MountainFramingham, Massachusetts USA 01701P/N 174786 6/94: REV.0
OC-1 SPECIFICATIONS Dimensions: .63" Hx1.29"Wx8.98"D(1.6x3.3x22.8 cm) Weight: .09 lbs. (.042 kg.) Input/Outp
3THEORY OF OPERATIONOverviewThe OC-1 is a small plug-in module for use with Bose 502™, 402™, and 802® II controllers. TheOC-1 allows the use of the C
4U4, sections 1 and 2 form a full-wave peak detector. When the input to these stages exceeds+/-2V peak, the outputs go high and a control voltage is
5Output 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:
6 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 s
7 Output is measured from U3 pin 1. Controls are set as in Figure 1.Figure 5. EQA + EQB + EQC + EQD + VCA
8Figure 6. OC-1 Block Diagram
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