Pioneer qa 800 a service manual

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pioneer qa 800 a service manual

Extracted text from pioneer qa 800 a service manual (Ocr-read)


Page 2

GA- 800A

CONTENTS

1. SPECIFICATIONS ..................................... 1
2. FRONT PANEL FACILITIES ............................ 3
3. CONNECTION DIAGRAM ............................... 5
4. CIRCUIT DESCRIPTION

4-1. Block diagram ....................................... 7

4-2. Signal paths ......................................... 8
5. DISASSEMBLY ........................................ 9
6. PARTS AND PCB LOCATION

6-1. Topview .......................................... 10

6-2. Bottom view ........................................ 10

7. CIRCUIT DIAGRAMS, PCB PATTERNS, AND PARTS LIST

7-1. Unit connection diagram and miscellaneous parts ............... 1 1
7-2. Head amp unit ...................................... 17
7-3. Control amp unit ..................................... 19
7-4. Main amp unit ....................................... 22
7-5. Decoder unit ........................................ 26
76. Logic unit ......................................... 31
7-7. SwitCh unit-1 ....................................... 34
7-8. Switch unit-2 ....................................... 36
7-9. Volume unit ........................................ 38
7-10. Fl unit ............................................ 40
7-11. Power supply unit ..................................... 41

8. PACKING METHOD AND PART NUMBERS --------------- 43