Bose OC-1 AWCS-II Service Manual

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Summary of Contents

Page 1 - OC-1 AWCS-II Option Card

©1994 Bose Corporation Service Manual®OC-1 AWCS-II Option Card

Page 2 - TABLE OF CONTENTS

1. Installing the Internal Protection CircuitHarnessA. Turn the controller so that its rear panelfaces you. See Figure 8.B. Remove 4 phillips-head scr

Page 3 - OC-1 SPECIFICATIONS

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

Page 4 - THEORY OF OPERATION

11Figure 13. External Harness ConnectionC. Connect the harness's other end to the speaker terminals on your amplifier with either screwlugs (Figu

Page 5

Test SetupInput Connections: Connect an oscillator to thepositive (+) and negative (-) input terminals forChannels 1 or 2. These procedures assume tha

Page 6 - Figure 2. EQA + EQB

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

Page 7 - Figure 3. EQA + EQB + EQC

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

Page 8

Notes for Future Reference15

Page 9 - Figure 6. OC-1 Block Diagram

16OC-1 Option Card Parts ListItemNumberDescription Part Number Qty.PerCartonSee Note1 Cable Assembly 174147 1 12 Option Card PC

Page 10 - OC-1 Installation Procedures

17Option Card (2)Cable Assembly (1)Internal ProtectionCircuit HarnessExternal ProtectionCircuit HarnessFigure 16. Option Card and Cable Assembly

Page 11

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

Page 12

1TABLE OF CONTENTS1. SPECIFICATIONS... 22. THEOR

Page 13 - OC-1 Test Procedures

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/

Page 14 - Input Connections

20CapacitorsReference DesignatorDescription Part Number See NoteC1,2,57 3300 pF,10%,50V,X7R,0805 133623-332C3 100 µF,20%,25V, 105,Electrolytic

Page 15

SPECIFICATIONS AND FEATURES SUBJECT TO CHANGE WITHOUT NOTICEBose CorporationThe MountainFramingham, Massachusetts USA 01701P/N 174786 6/94: REV.0

Page 16 - Notes for Future Reference

OC-1 SPECIFICATIONS Dimensions: .63" Hx1.29"Wx8.98"D(1.6x3.3x22.8 cm) Weight: .09 lbs. (.042 kg.) Input/Outp

Page 17 - OC-1 Option Card Parts List

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

Page 18 - Circuit Harness

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

Page 19 - OC-1 Electrical Parts List

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:

Page 20 - Connectors

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

Page 21 - Capacitors

7 Output is measured from U3 pin 1. Controls are set as in Figure 1.Figure 5. EQA + EQB + EQC + EQD + VCA

Page 22 - The Mountain

8Figure 6. OC-1 Block Diagram

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