Daewoo DV-6T812N, Service Manual

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21
TROUBLESHOOTING
Check ICD04(DVD) Block
at IC251 pin#2, 3, 6, 7, 10,
11, 8, 9.
Is there Audio signal?
REC 'H' BASE voltage at
Q201 is 5V?
Check IC101(MPX) Block.
Check Input LINE1 JACK.
Check Input LINE2 JACK.
Check ICD02(DVD) Block.
Replace IC251
YES
NO
NO
NO
Is FM OSC signal at IC251
pin#36?
Is FM OSC signal at IC301
pin#2?
Check IC601 pin#22
c. No HIFI playback in record/playback mode(REC MODE)
YES
YES
Replace DRUM
NO
HEAD CLEANING.
YES
D. No NORMAL AUDIO playback (PLAY MODE)
Is Playback Audio signal at
IC301 pin#11?
Check R298,R299, R646,
R647
YES
NO
NO
Is about 3.5V obtained at IC252
pin#9? Is about 8V obtained at
pin#10 ?
Check A/C HEAD and IC301
YES
Replace IC252
YES
Is there signal at IC252
pin#3,13?
NO
Check power circuit.
NO
Voltage at IC251 pin#34 and
IC252 pin#16 is 12V? Voltage
at IC301 pin#18 is 5V?