When Playing Disc, No Audio Output - LG RH265 Service Manual

ELECTRICAL TROUBLESHOOTING GUIDE

5. WHEN PLAYING DISC, NO AUDIO OUTPUT

Check Q817,
Q809, Q810, Q801
Check
IC904 pin8 (12VT)
YES
Replace IC904
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Only for training and service purposes
When playing DISC,
No Audio Output
IC903
pin14,15 : Is there a
signal?
YES
IC903
pin1,16 (Z_MUTE
NO
R/L) : IC701 pin58
(A_MUTE_L) :
YES
NO
IC904 pin1, 7
Is there a signal
YES
IC801
pin34, 35, 37, 38 :
Is there a signal?
YES
L806, L826, L825, L810 :
Is there a signal?
YES
Check
Cable connections &
TV Audio mute.
Check IC903
NO
pin5, 6, 7, 8 :
Pin 3, 4 (Host CLK &
DATA) :
YES
Check
IC903 pin11 (5VD)
YES
Replace IC903
Check IC801 pin14 (12V)
NO
pin 30 (5,3V) pin31, 32
(SCL,SDA) :
3-9
IC101
NO
DEFECT
NO
Replace
IC801
LGE Internal Use Only