21
TROUBLE SHOOTING GUIDE
E-4.
COLOUR IN THE PLAYBACK MODE
Is the RF signal obtained
from pin13 of IC401?
NO
TO PREAMP IN THE
PLAYBACK MODE
YES
Is the RF signal from pin13
of IC401 fed to pin15 of
IC301?
NO
Check Q401, adjacent
and PCB pattern
YES
Is ON/OFF 5V supplied to
pin36 and 47 of IC301?
NO
Check the ON/OFF 5V
YES
Is the colour signal from
pin15 of IC301 fed to
pin48 and 50 of IC301?
NO
Check IC301
YES
Is the colour sinal from
pin48 and 50 of IC301
fed to pin13 of IC302?
NO
Check C351, C354, IC302
and adjacent circuit
YES
Is the colour signal from
pin13 of IC302 fed to
pin45 of IC301 through
pin52 and 46?
NO
Check Q304, C332, and
R317
YES
Is the C.ROTARY supplied
to pin66 of IC301?
NO
Check C.ROTARY
YES
To output buffer circuit
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Summary of Contents for DV-S123W Series
Page 33: ...32 PRINTED CIRCUIT BOARD 1 PCB MAIN All manuals and user guides at all guides com...
Page 34: ...33 PRINTED CIRCUIT BOARD 2 PCB POWER SMPS All manuals and user guides at all guides com...
Page 40: ...39 EXPLODING VIEWS PARTS LIST 1 PACKING AS All manuals and user guides at all guides com...
