Daewoo SD-8100, Service Manual

Page: 23 / 63

23
TROUBLESHOOTING
No Hi-Fi 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?
REC ‘H’ BASE voltage
at Q201 is 5V?
Check IC101(MPX) Block.
Check Input AV1 JACK.
Check Input AV-F JACK.
Check ICD01(DVD) Block.
Check Input AV2 JACK.
Replace IC251.
YES
NO
NO
NO
Is there FM OSC signal at IC251
pin #36?
Is there FM OSC signal at
P301 pin#2?
Check IC601 pin#22.
c. No HIFI Audio in record/playback mode(REC MODE)
YES
YES
Replace DRUM.
NO
HEAD Cleaning.
YES