Daewoo DF-4100, Service Manual

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21
TROUBLESHOOTING
20
TROUBLESHOOTING
e. FRONT E-E
No sound in FRONT E-E
mode.
NO
Check Input FRONT JACK
Is Audio signal at IC251
pin#10,11?
Is Audio signal output at IC602 pin
#3, 13?
Is Audio signal output at IC251
pin#19, 20?
Are CLK and DATA obtained at
IC251 pin#42,43?
NO
Is 5V obtained at IC251 pin#40?
Replace IC251.
YES
YES
Is 12V obtained at IC251 pin#34?
NO
YES
Check POWER circuit.
YES
YES
Check Output JACK.
YES
Check IC602.
NO
d. DVD E-E
No sound in DVD
E-E mode.
Is there DVD Audio at IC102
pin#7,8?
Is 12V obtained at ICD02 pin#8?
Is Audio(DVD) signal at IC602
pin#5,14?
YES
YES
Check ICD02.
NO
Check IC102, MPEG board
NO
Check POWER circuit.
NO
Is DVD Audio signaloutput at
ICD02 pin#1,7?
Check ICD02.
NO
YES
Is Audio signal output at IC602 pin
#3,13?
YES
Check Output JACK.
YES
Check IC602.
NO