Daewoo DV-F24S, Service Manual

Page: 43 / 110

41
Is the video signal obtained
from pin
‘
of ICL01 (AV circuit)?
F. Troubleshooting of luminance signal in the record mode.
NO
Check AV circuit
YES
Is the video signal from pin
‘
fed to pin
2
of IC301?
NO
Check C316 and pattern
YES
Is ON/OFF 5V supplied to pin
3
and pin
t
of IC301 at 5 volts?
NO
Check ON/OFF 5V
YES
Is EE(L) supplied to anode of
D302 at 0 volt?
NO
Check EE(L)
YES
Is the video signal from pin
2
of IC301 fed to pin
$
of IC301?
NO
Are Q301, Q302, Q306
and R310 O.K.?
YES
Is the luminance signal from pin
$
of IC301 fed to pin
%
of IC301?
NO
Check Q307, Q311
C302 and R313
YES
To PREAMP circuit
YES
Is the luminance signal from pin
%
of IC301 fed to pin
@
of IC301?
NO
Is TRICK (H) supplied to the
anode of D309 at zero volt?
YES
Is the modulating luminance
signal from pin
@
of IC301
fed to pin
$
of P302?
NO
Check record EQ circuit
Change damaged
components
Change IC301
Check TRICK (H)
Change IC301
NO
YES
NO
YES
* The record EQ circuit consists of R301, R302, R303,
R304, R305, R307, L301, L302, L303, L304, C305,
C306, C307 and C304.