7
TROUBLESHOOTING
Noise appears on the
playback screen.
Is noise diminished by tracking
adjustment.
Noise band is trembled up and
down?
Re-adjust PATH.
Is the height of CTL HEAD normal?
No dust?
Is there problem in CTL Input
circuit and amplifier.
YES
NO
NO
NO
Is there CTL pulse at IC501
pin#97?
Check IC501.
Noise appears on the screen even
though changing tape.
Re-adjust the height of AC HEAD.
Remove the dust.
Check C510,R545~R547
IC 501 pin #91, 92, 98.
NO
Re-adjust PATH.
B-1. Bad playback quality (1)
YES
YES
YES
YES
Noise appears on the Full
playback screen.
Are SW pulse and HA SW normal?
Recheck step B-1
(Bad playback quallty (1)).
Check HEAD AMP connector
and HEAD.
YES
YES
NO
NO
ENVE Wave at PT01 pin #4?
Check VIDEO circuit.
Are there SW, HA SW pulse at
IC501 pin #16, 18?
Check PCB Pattern.
Check IC501.
B-2. Bad playback quality (2)
YES
NO
YES
All manuals and user guides at all-guides.com
Содержание DC-G84D1D
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...