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TABLE OF CONTENTS
1.
SERVICING NOTES
...............................................
2
2.
GENERAL
...................................................................
3
3.
DISASSEMBLY
.........................................................
5
4.
DIAGRAMS
4-1. IC Pin Function Description ...........................................
7
4-2. Block Diagram – Main Section – .................................. 11
4-3. Block Diagram
4-3. Block Diagram
– DISPLAY/POWER SUPPLY Section – ...................... 13
4-4. Note for Printed Wiring Boards and
Schematic Diagrams ....................................................... 15
4-5. Printed Wiring Board – MAIN Board – ........................ 17
4-6. Schematic Diagram – MAIN Board (1/2) – ................... 19
4-7. Schematic Diagram – MAIN Board (2/2) – ................... 21
4-8. Schematic Diagram – POWER Board (1/2) – ................ 23
4-9. Schematic Diagram – POWER Board (2/2) – ................ 25
4-10. Printed Wiring Board – POWER Board – ..................... 27
4-11. Printed Wiring Board – SP Board – .............................. 29
4-12. Schematic Diagram – SP Board – ................................. 30
4-13. Printed Wiring Board – GEQ Board – ........................... 31
4-14. Schematic Diagram – GEQ Board – ............................. 33
4-15. Printed Wiring Board – STR FL Board – ...................... 35
4-16. Schematic Diagram – STR FL Board – ......................... 37
4-17. Printed Wiring Board – SW Board – ............................. 39
4-18. Schematic Diagram – SW Board – ................................ 41
4-19. Printed Wiring Boards
4-6. Schematic Diagram – MAIN Board (1/2) – ................... 19
4-7. Schematic Diagram – MAIN Board (2/2) – ................... 21
4-8. Schematic Diagram – POWER Board (1/2) – ................ 23
4-9. Schematic Diagram – POWER Board (2/2) – ................ 25
4-10. Printed Wiring Board – POWER Board – ..................... 27
4-11. Printed Wiring Board – SP Board – .............................. 29
4-12. Schematic Diagram – SP Board – ................................. 30
4-13. Printed Wiring Board – GEQ Board – ........................... 31
4-14. Schematic Diagram – GEQ Board – ............................. 33
4-15. Printed Wiring Board – STR FL Board – ...................... 35
4-16. Schematic Diagram – STR FL Board – ......................... 37
4-17. Printed Wiring Board – SW Board – ............................. 39
4-18. Schematic Diagram – SW Board – ................................ 41
4-19. Printed Wiring Boards
– FUNCTION/CD KEY Boards – .................................. 43
4-20. Schematic Diagram
– FUNCTION/CD KEY Boards – .................................. 45
4-21. Printed Wiring Boards
– MD KEY/REC MODE KEY Boards – ....................... 47
4-22. Schematic Diagram
– MD KEY/REC MODE KEY Boards – ....................... 49
4-23. Printed Wiring Board – EDIT FL Board – .................... 51
4-24. Schematic Diagram – EDIT FL Board – ....................... 53
4-25. Printed Wiring Boards
4-24. Schematic Diagram – EDIT FL Board – ....................... 53
4-25. Printed Wiring Boards
– SUB POWER/TA PRIMARY/TA SECONDARY
Boards – ........................................................................... 55
Boards – ........................................................................... 55
4-26. Schematic Diagram
– SUB POWER/TA PRIMARY/TA SECONDARY
Boards – ........................................................................... 57
Boards – ........................................................................... 57
5.
EXPLODED VIEWS
................................................ 61
6.
ELECTRICAL PARTS LIST
............................... 64
[MC Cold Reset]
• The system microprocessor can be reset in the following proce-
dure.
Procedure:
1. Press three buttons
1. Press three buttons
[AUTO]
,
[DISPLAY]
(tuner section) and
[DISPLAY]
(amplifier section) simultaneously.
2. When HMC-MD777 (CD player/MD deck section) received
reset command, “SRAM COLD SET” is display a few sec-
onds on fluorescent indicator tube.
onds on fluorescent indicator tube.
3. Press the
[I/ ]
button to turn the POWER OFF.
Notes on chip component replacement
• Never reuse a disconnected chip component.
• Notice that the minus side of a tantalum capacitor may be dam-
• Notice that the minus side of a tantalum capacitor may be dam-
aged by heat.
SAFETY-RELATED COMPONENT WARNING!!
COMPONENTS IDENTIFIED BY MARK
!
OR DOTTED
LINE WITH MARK
!
ON THE SCHEMATIC DIAGRAMS
AND IN THE PARTS LIST ARE CRITICAL TO SAFE
OPERATION. REPLACE THESE COMPONENTS WITH
SONY PARTS WHOSE PART NUMBERS APPEAR AS
SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUB-
LISHED BY SONY.
OPERATION. REPLACE THESE COMPONENTS WITH
SONY PARTS WHOSE PART NUMBERS APPEAR AS
SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUB-
LISHED BY SONY.
SECTION 1
SERVICING NOTES
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