Daewoo DF-5500(S/P) Service Manual page 24

DF-5500/DFX-5502 SVC 2006.10.14 10:6 AM
i. No Hi-Fi playback in record/playback mode (REC MODE)
Are there Audio signal
at IC251 pin#2~11?
YES
Is FM OSC signal at IC251
pin#36?
YES
Is FM OSC signal at P401 pin#2?
YES
HEAD CLEANING.
j. No NORMAL AUDIO playback (PLAY MODE)
Is there normal Audio signal at
IC251 pin#17, 18?
k. No Sound in JK101 COAXIAL Jack.
Pin #25 of P302 is Digital
signal SPDIF?
YES
Check JK102 and PCB pattern.
˘ ` 23 mac001 1200DPI 80LPI
Check input SCART JACK.
NO
Check input front jack.
Check ICD02(DVD).
NO
Replace IC251
NO
Replace DRUM.
NO
Voltage at IC251 pin#34 is 12V?
Voltage at IC251 pin#40 and at
IC301 pin#18 is 5V?
YES
Is Playback Audio signal at
IC301 pin#11?
YES
Is there Playback Normal Audio
signal at IC251 pin #16,17?
YES
Check Output JACK.
NO
Check Digital board.
23
TROUBLESHOOTING
NO
Check power circuit.
NO
Check A/C HEAD and IC301
NO
Replace IC251.