Daewoo DV-K882SY-AN, Руководство по обслуживанию

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46
Is signal from PREAMP circuit
fed to pin
^
of P302?
I. Troubleshooting of SECAM colour in the playback mode.
NO
Check PREAMP circuit
YES
Is signal from pin
^
of P302
fed to pin
8
of ICL01 through
PB AMP and 1.1 MHz BPF?
NO
Check PB AMP and
1.1MHz BPF
YES
Is ON/OFF 5V from pin
*
of P303
supply to pin
‘
and
+
of ICL01?
NO
Check ON/OFF 5V
YES
Is EE (H) from pin
&
of P303
supply to pin
9
of ICL01 at 0 volt?
NO
Check EE (H)
YES
Is SECAM colour signal from
8
fed to pin
=
of ICL01 through
pin
q
and 12dB AMP circuit?
NO
Check 12dB AMP circuit
YES
Is C.SYNC (composite syne)
supply to pin
6
of ICL01?
NO
Check C. SYNC
YES
To Video (Y/C) circuit
YES
Is the signal from pin
=
fed to
pin
1
through pin
^
and
*
of ICL01?
NO
Check ICL01, RL405
LL401, CL404
YES
Is the signal from pin
1
of ICL01
fed to pin
E
of IC301 (LA7437)?
NO
Check QL409, RL408
and SECAM (H)
* • The PB AMP circuit consists of QL415, RL439, RL440, RL441 and CL430.
• The 1.1 MHz BPT circuit consists of RL410, RL411, CL408, LL402 and RL406.
• The 12 dB AMP circuit consists of QL413, RL427, RL428, RL429, and CL429.