B.TROUBLESHOOTING OF PB MODE
PB video sgnal missing.
YES
Is CLK-DATA signal
Check IC 601 pin 72, 71.
input pin 23,24 of IC 301?
NO
YES
Is envelope out from
Is 5V supplied at
Check power
pin 74 of IC 301?
NO
IC 301 pin 87?
NO
circuit.
YES
YES
Is SW pulse input into
Check IC601
IC301 pin 11?
NO
pin 18.
YES
Clean head or
change head
Is signal output from
Is 5Vsupplied at IC301
Check power
IC301 pin 29?
NO
pin 16, 55, 58?
NO
circuit.
YES
YES
Change IC301.
Is signal input into
Change IC301.
IC301 pin 20?
NO
YES
Is video signal output
Change IC301.
Check Q303.
from IC301pin 43?
NO
YES
YES
Is composite video signal
Is composite video signal
Is CLOCK supplied
input into IC301 pin 41?
NO
output from IC301 pin 46? NO
at IC301 pin 49?
YES
NO
Is composite video signal
Change IC301.
Does X301 crystal
output from IC301pin 29? NO
oscillate?
YES
NO
Check OSD circuit.
Change X301.
Содержание DV-T1B1WX-BB/D
Страница 4: ...3 INTERCONNECT WIRING DIAGRAM...
Страница 5: ...4 POWER SUPPLY SCHEMATIC CIRCUIT DIAGRAM MIDDLE EAST...
Страница 7: ...6 POWER BLOCK DIAGRAM...
Страница 8: ...7 SERVO SYSCON SCHEMATIC DIAGRAM MIDDLE EAST...
Страница 10: ...9 SERVO SYSCON BLOCK DIAGRAM...
Страница 11: ...10 VIDEO AUDIO SCHEMATIC DIAGRAM...
Страница 13: ...VIDEO RECORD PATH FOR PAL 12 VIDEO PLAYBACK PATH FOR PAL...
Страница 14: ...13 PIF SCHEMATIC DIAGRAM...
Страница 16: ...15...
Страница 17: ...16...
Страница 29: ......