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
Summary of Contents for DC-F84D1D
Page 27: ...26 CIRCUIT DIAGRAM 1 POWER CIRCUIT DIAGRAM ...
Page 28: ...27 CIRCUIT DIAGRAM 2 SERVO SYSCON CIRCUIT DIAGRAM ...
Page 29: ...28 CIRCUIT DIAGRAM 3 A V CIRCUIT DIAGRAM ...
Page 30: ...29 4 HiFi SW INPUT CIRCUIT DIAGRAM CIRCUIT DIAGRAM ...
Page 31: ...30 CIRCUIT DIAGRAM 5 HI FI PIF INPUT CIRCUIT DIAGRAM ...
Page 37: ...36 PCB CIRCUIT BOARD 1 1 VCR MAIN ...
Page 38: ...37 PCB CIRCUIT BOARD 1 2 POWER ...
Page 39: ...38 PCB CIRCUIT BOARD 1 3 DVD MAIN ...
Page 58: ...57 ELECTRICAL PARTSLIST ...