Daewoo DV6T712D Service Manual page 25

TROUBLESHOOTING
F. No NORMAL Auido in record/playback mode(Check in REC mode)
No Normal Audio in
record/playback mode
IC251 pin#2, 3,
IC251 pin#6, 7,
IC251 pin#10, 11,
IC251 pin#4,5
IC251 pin#8, 9.
Is there Audio signal?
YES
Is there recording signal at
IC251 pin#21?
YES
Signal at IC251 pin#21 is
transferred to IC301 pin#13,15,17?
YES
REC 'H' BASE voltage at
Q201 is 5V?
YES
Collect signal at Q203 is
70KHz, about 70Vp_p?
YES
Check P201 pin#2, 4, 8 and
A/C HEAD.
Check Input AV1 JACK.
NO
Check Input AV-F JACK.
Check ICD03(DVD) Block.
Check Input AV2 JACK.
NO
Check IC251.
NO
Check signal flow circuit.
NO
Check IC601 pin#22.
NO
Check Q202.
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