20
TROUBLE SHOOTING GUIDE
E-3. LUMINANCE IN THE PALYBACK MODE
Is the RF signal obtained
from pin13 of IC401?
NO
TO PREAMP IN THE
PLAYBACK MODE
YES
Is the RF signal from pin7
of IC301?
NO
Check Q401 and adjacent
YES
Is ON/OFF 5V supplied to
pin36 and 47 of IC301?
NO
Check the ON/OFF 5V
YES
Is the luminance signal
from pin15 fed to pin20
of IC301 through Q302?
NO
Check Q302 and adjacent
Circuit
YES
Is the luminance signal
from 26 fed to pin38 of
IC301?
NO
Check IC301
YES
To output buffer circuit
( Check Q604 and
adjacent 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...
