2. SYSTEM CIRCUIT
6
TROUBLESHOOTING
No LED display.
Is 5V obtained at IC701
pin #9, 25?
Oscillation at IC701pin #1?
Specific GRID/SEG doesn t function.
Check R588, D857, L503, L860
Exchange IC701.
Check IC 701 pin #22~24, 27,
28, 30, 31.
Check IC 701 pin #10~12, 14~21.
NO
YES
YES
NO
NO
GRID output at PORT of IC701?
YES
SEG output at PORT of IC701?
Exchange IC701.
YES
A. LED DISPLAY
NO
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Содержание DC-B84D1P
Страница 27: ...26 CIRCUIT DIAGRAM 1 POWER SUPPLY CIRCUIT DIAGRAM All manuals and user guides at all guides com...
Страница 28: ...27 CIRCUIT DIAGRAM 2 SERVO SYSCON CIRCUIT DIAGRAM All manuals and user guides at all guides com...
Страница 29: ...28 CIRCUIT DIAGRAM 3 A V CIRCUIT DIAGRAM All manuals and user guides at all guides com...
Страница 30: ...29 4 HiFi SW INPUT CIRCUIT DIAGRAM CIRCUIT DIAGRAM All manuals and user guides at all guides com...
Страница 37: ...36 PCB CIRCUIT BOARD 1 1 VCR MAIN All manuals and user guides at all guides com...
Страница 38: ...37 PCB CIRCUIT BOARD 1 2 POWER All manuals and user guides at all guides com...
Страница 39: ...38 PCB CIRCUIT BOARD 1 3 DVD MAIN All manuals and user guides at all guides com...
Страница 45: ...44 INSTRUMENT DISASSEMBLY G Explode view All manuals and user guides at all guides com...