Daewoo DQD-6100D, Service Manual, Page: 30 / 63

29
TROUBLESHOOTING
No AUDIO output from
COAXIAL JACK(JK302)
RECEIVER is on COAXIAL
MODE?
Check IC 306
Check FFC CABLE connected to P205 and
MPEG Decoder IC pin #133
YES
YES
NO
NO
AUDIO DIGITAL signal at P205
pin #1?
AUDIO DIGITAL signal at IC306 pin
#1,2,3,4,5,6,8,9,10,11,12,13?
Change RECEIVER setting
No AUDIO output from
OPTICAL JACK(JK303)
Is RECEIVER on OPTICAL
MODE?
AUDIO DIGITAL signal at P205
pin #1?
Change RECEIVER setting
Check POWER circuit and +5V
LINE
YES
YES
NO
NO
NO
+5V obtained at JK303 center
pin?
Check OPTICAL JACK(JK303)
Check FFC CABLE connected to P205 and
MPEG Decoder IC pin #133
YES
YES
YES
✓
Caution
In case of COAXIAL and OPTICAL, check connection with receiver first before the circuit test.
B. Digital OUT
YES
+5V obtained at IC306 pin #14?
Check POWER circuit and +5V
LINE
NO
Check COAXIAL JACK
Check D320, D321
YES
NO Problem
NO