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Table of Contents

Table Of Contents2

Safety Information3

Electrostatic Discharge Sensitive (Esds) Device Handling4

Specifications5

Theory Of Operation6

General Operation And Block Diagram Overview6

Surround Decoder7

Microcontroller8

Center Channel Frequency Response10

Surround Channel Frequency Response10

Bass And Left/Right Channel Frequency Response11

Dynamic Equalizer Frequency Response11

Surround Detector12

Decoder Gain Cell13

Decoder Matrix13

Satellite Equalizaton14

Bass Channel Equalization14

Bass Power Amplifier14

Satellite Power Amplifiers15

Voltage At Collector Of Q381 (Bass Amplifier)16

Treble Control Frequency Response16

Compressor Operation17

Protection Circuits17

Simplified Block Diagram Of Shared 2 Channel Class-G Amplifier19

Pcb Block Diagram20

Surround Decoder Block Diagram21

Disassembly/Assembly Procedures22

Cover Removal22

Cover Replacement23

Main Pcb Assembly Removal23

Main Pcb Assembly Replacement23

Amplifier Pcb Removal23

Module Enclosure Disassembly24

Cover Assembly24

Module Assembly Exploded View25

Heatsink/Amplifier Pcb Subassembly25

Amplifier Pcb Replacement26

Transformer Removal26

Transformer Replacement27

Woofer Removal27

Woofer Replacement27

Woofer Harness Hookup27

Cube Array (Satellite) Procedures28

Grille Assembly Removal28

Grille Assembly Replacement28

Twiddler Removal28

Test Set-Up Parameters29

Potentiometer Settings29

Manual Test Mode29

Test Procedures30

Frequency Response31

Amplifier Test32

Small Signal Distortion (.5 W Output)32

Large Signal Distortion32

Compressor Test32

Bass Module Sweep Test33

Air Leak Test33

Tone Control Test33

Part List Notes34

Pcb Identification34

Main Part List35

Bass Module Exploded View36

Electrical Part List37

Satellite Part List43

Packing Part List44

Packing Diagram45

Integrated Circuits46

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