6
TROUBLESHOOTING GUIDES
Is each key pulse
applied to pin
of IC601?
Check key matrix
circuit.
Check IC601
When disconnecting
the power cord,Is 5.0V
at pin of IC601?
Do pin and
of IC601
oscillate?
Check IC601.
Check C820.
Check X601, R603,
C604 and C605.
NO
YES
YES
YES
YES
NO
NO
NO
B.
C.
Check the IC602
RESET circuit.
Is 0V applied to
pin of Ic601?
YES
NO
Check the R636, C616.
LED ARRAY is
lit but key does
not operate.
1 hour back up
timer does not
operate.
Is +5V applied to
34
4
35
37
11 12
36
pin of IC601?
Содержание DV-K892NZ-QB/M
Страница 29: ...28 CIRCUIT DIAGRAM 1 INTERCONNECT WIRING DIAGRAM...
Страница 30: ...29 CIRCUIT DIAGRAM 2 POWER SUPPLY SCHEMATIC DIAGRAM...
Страница 31: ...30 CIRCUIT DIAGRAM 3 SYSCON CIRCUIT DIAGRAM...
Страница 32: ...31 CIRCUIT DIAGRAM 4 VIDEO AUDIO SCHEMATIC DIAGRAM 4 HEAD...
Страница 33: ...32 CIRCUIT DIAGRAM 5 VIDEO AUDIO SCHEMATIC DIAGRAM HI FI...
Страница 34: ...33 CIRCUIT DIAGRAM 6 PIF SCHEMATIC DIAGRAM 4 HEAD 68 16 4...
Страница 35: ...34 CIRCUIT DIAGRAM 7 HI FI SCHEMATIC DIAGRAM...
Страница 36: ...35 CIRCUIT DIAGRAM 8 PIF MPX SCHEMATIC DIAGRAM HI FI 68 16...
Страница 37: ...36 PCB CIRCUIT BOARD MAIN PCB...
