Daewoo DV6T812N Service Manual page 9

TROUBLESHOOTING
C-2. Bad playback quality (2)
Noise appears on the Full
playback screen.
YES
Are SW pulse and HA SW
normal?
YES
ENVE Wave at PT01 pin #4?
YES
Check VIDEO circuit.
D. No broadcasting signal received
No broadcasting signal
received
YES
Is the output at IC601 pin#
71(CLK), 72 (DATA) normal?
YES
Is SIF,Video output at
TMI(RF101) pin#18,20 normal?
YES
Is Video Signal input at IC601
pin#50?
YES
Is there Video output at IC601
pin#52?
YES
Check Video Buffer Q101
Recheck step C-1 (Bad
playback quallty (1)).
NO
Are there SW, HA SW pulse at
IC601 pin #16, 18?
YES
NO
Check HEAD AMP connector
and HEAD.
NO
Check IC 601.
NO
Check TMI (RF101) Block.
NO
Check IC301.
NO
Check IC601.
8
NO
Check IC601.
Check PCB Pattern.