No Optical/Digital Output; No Tuner Audio Output - LG RH265 Service Manual

ELECTRICAL TROUBLESHOOTING GUIDE

6. NO OPTICAL/DIGITAL OUTPUT

R363 :
Is there a signal?
YES
Check
PVM04 pin19 (SPDIF_OUT) :
YES
C856 :
Is there a signal?
YES
BD817 :
Is there a signal?
YES
Check JK802 & RCA
cable connection

7. NO TUNER AUDIO OUTPUT

TU701 pin 15 (A_OUT) :
Is there a signal?
YES
IC801 pin8, 9
Is there a signal?
YES
IC801 pin40, 41 :
Is there a signal?
YES
IC902 pin3,5 :
Is there a signal?
YES
IC901
pin9,10,11,12 : Is there a
signal?
YES
Check Cable connections
between Main & I_O
LGE Internal Use Only
.
.
.
Check IC801 pin14 (12V)
NO
pin30 (5,3V) pin31, 32
SCL,SDA) :
Replace IC801
NO
IC902 pin2 GND?
Replace IC902
NO
Check IC901 Power
3.3V & 5V
YES
NO
YES
NO
3-10 Copyright © 2007 LG Electronics. Inc. All right reserved.
Replace IC701
Replace IC901
Only for training and service purposes