When Playing Disc, No Audio Output - LG RC-185 Service Manual

VDR ELECTRICAL TROUBLESHOOTING GUIDE

5. WHEN PLAYING DISC, NO AUDIO OUTPUT

Check Q15C1, 15C2(In
NO
DVD Board) Q901, 907,
904, 906(In VCR Board)
NO
IC15A1-pin15, 18 (Audio_
out R/L): Is there a signal?
YES
IC805-Pin14, 19(Z_mute_R/L) :
IC501-pin58(A_mute_L) :
NO
R15C7, R15C8 on DVD
PCB Is there a signal?
YES
Only "Without SCART model"
NO
IC802-pin6, 12:
Is there a signal?
YES
L905, L906 :
Is there a signal?
YES
Check Cable connec-
tion & TV Audio mute
3-72
Check IC15A1-pin1~4:
Pin10(reset) :
Pin7,8(I 2 C) :
YES YES
Check IC15A1-
pin3,6,13(VCC)
YES YES
Replace IC15A1
Check IC802-pin2, 4(VCC):
pin32, 33(SLC/CLK) :
NO
IC1101 DEFECT
R929, R930 on VCR
PCB Is there a signal
YES