Sony MDX-C7970/C7970R, Service Manual

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1. GENERAL
Location of Controls ....................................................... 4
Resetting the Unit ........................................................... 5
Detaching the Front Panel ............................................... 5
Preparing the Rotary Commander .................................. 5
Setting the Clock ............................................................. 5
Using the Rotary Commander ........................................ 5
Adjusting the Sound Characterisitics ............................. 5
Attenuating the Sound .................................................... 5
Changing the Sound and Display Settings ..................... 6
Boosting the Bass Sound ................................................ 6
Installation ....................................................................... 7
Connections ..................................................................... 8
2. DISASSEMBLY
......................................................... 12
3. ELECTRICAL ADJUSTMENTS
Test Mode ........................................................................ 18
MD Section ..................................................................... 18
Tuner Section .................................................................. 18
4. DIAGRAMS
4-1. Block Diagram – SERVO Section – ............................... 23
4-2. Block Diagram – TUNER Section – .............................. 25
4-3. Block Diagram – MAIN Section – ................................. 27
4-4. Block Diagram
– DISPLAY/KEY CONTROL Section – ........................ 29
4-5. Block Diagram
– BUS CONTROL/POWER SUPPLY Section – ........... 31
4-6. Note for Printed Wiring Boards and
Schematic Diagrams ....................................................... 33
4-7. Printed Wiring Boards – SERVO Section – ................... 35
4-8. Schematic Diagram – SERVO Board (1/3) – ................. 37
4-9. Schematic Diagram – SERVO Board (2/3) – ................. 39
4-10. Schematic Diagram – SERVO Board (3/3) – ................. 41
4-11. Printed Wiring Board
– MAIN Board (Component Side) – .............................. 43
4-12. Printed Wiring Board
– MAIN Board (Conductor Side) – ................................ 45
4-13. Schematic Diagram – MAIN Board (1/4) – ................... 47
4-14. Schematic Diagram – MAIN Board (2/4) – ................... 49
4-15. Schematic Diagram – MAIN Board (3/4) – ................... 51
4-16. Schematic Diagram – MAIN Board (4/4) – ................... 53
4-17. Printed Wiring Board – DISPLAY Board – ................... 55
4-18. Schematic Diagram – DISPLAY Board – ...................... 57
4-19. Printed Wiring Board – SUB Board – ............................ 59
4-20. Schematic Diagram – SUB Board – ............................... 61
4-21. IC Pin Function Description ........................................... 69
5. EXPLODED VIEWS
................................................ 79
6. ELECTRICAL PARTS LIST
............................... 83
TABLE OF CONTENTS