Daewoo DV6T812N Service Manual page 22

c. No HIFI playback in record/playback mode(REC MODE)
Check ICD04(DVD) Block
at IC251 pin#2, 3, 6, 7, 10,
11, 8, 9.
Is there Audio signal?
YES
REC 'H' BASE voltage at
Q201 is 5V?
YES
Is FM OSC signal at IC251
pin#36?
YES
Is FM OSC signal at IC301
pin#2?
YES
HEAD CLEANING.
D. No NORMAL AUDIO playback (PLAY MODE)
Is there signal at IC252
pin#3,13?
Check IC101(MPX) Block.
NO
Check Input LINE1 JACK.
Check Input LINE2 JACK.
Check ICD02(DVD) Block.
NO
Check IC601 pin#22
NO
Replace IC251
NO
Replace DRUM
NO
Voltage at IC251 pin#34 and
IC252 pin#16 is 12V? Voltage
at IC301 pin#18 is 5V?
YES
Is Playback Audio signal at
IC301 pin#11?
YES
Is about 3.5V obtained at IC252
pin#9? Is about 8V obtained at
pin#10 ?
YES
Replace IC252
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TROUBLESHOOTING
NO
Check power circuit.
NO
Check A/C HEAD and IC301
NO
Check R298,R299, R646,
R647