Daewoo DQD-2100D, Service Manual

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28
TROUBLESHOOTING
3. AUDIO circuit
✓
Caution
Before the AUDIO circuit test, check SETUP MENU setting first by remote controller.
A. Analog OUT
No AUDIO output from 5.1CH
JACK(JK300)
In case of 2CH setting
Speaker Downmix of SET UP Menu is set
on Lt/Rt or Lo/Ro?
CLOCK signal at P205 pin #6, 7, 8 and
DATA signal at pin #10, 11,13?
CLOCK signal at IC350 pin #18, 19, 20 and
DATA signal at pin #1, 2, 3?
In case of 5.1CH setting
Is “Digital Output” item in Audio menu in
SETUP screen set properly to “Bitstream” or
”PCM” according to DVD title?
Speaker Downmix of SET UP Menu is set on
OFF/CENTER, BACK, SUBWOOFER ON?
Change SET UP menu setting
Check signal LINE
Check POWER circuit and +5V
LINE
YES
YES
YES
NO
NO
NO
+5V obtained at IC350 pin #15?
YES
AUDIO output wave at IC350 pin
#8,9,10,11,12,13?
Check FFC CABLE connected to P205 and
MPEG Decoder IC pin #130-#141
+12V obtained at IC303,304,305 pin #8?
YES
NO
AUDIO signal output at IC303,304,305 pin
#1,#7?
Check IC350
NO
Check POWER circuit and +12V LINE
NO
Check IC303,304,305
Exchange inferior ITEM
Exchange inferior ITEM
Check Q300,301,302,303,304,305
Check D308, 309, 310,311, 312,
313, 314, 315, 316, 317, 318, 319
YES
YES
YES
NO Problem
NO
Problem
Problem