Daewoo DV6T812N Service Manual page 23

TROUBLESHOOTING
E. No NORMAL AUDIO playback in record/playback mode(Check in REC mode)
No Normal Audio playback in
record/playback mode
Check ICD04(DVD) Block
at IC251 pin#2, 3, 6, 7, 10,
11, 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
about 70Vp-p at 70KHz?
YES
Check P202 pin#2, 4, 8 and
A/C HEAD.
Check IC101(MPX) Block.
NO
Check Input LINE1 JACK.
Check Input LINE2 JACK.
Check ICD02(DVD) Block.
NO
Check IC251.
NO
Check signal flow circuit.
NO
Check IC601 pin#22.
NO
Check Q202.
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