
- 22 -
LGE Internal Use Only
Copyright ©
LG Electronics. Inc. All rights reserved.
Only for training and service purposes
12. Component No sound
Check Component cable
Check Jack Audio signal
L : R2802
R : R2803
Check audio signal
L : R2802, C2803, R2810
R2815, C216
R : R2803, C2802, R2811
R2816, C219
Replace audio signal component
L : R2802, C2803, R2810, R2815, C216
R : R2803, C2802, R2811, R2816, C219
Replace Jack JK2802
Follow procedure
“9. All source audio”
NG
NG
OK
OK
OK
13. IR Out
Check IR (P4600) 7Pin and R4611
Replace IR and Cable
Check the R3505
Replace Q3501, R3503, R3502
Check the R3502
Replace Q3500, R3501
Check PM_TXD line
R707
Replace IC3200
Check Pin4 of RS232C(P702)
If there is no problem
without RS232C connection with external box,
check the PU/PD resistor value of the external box in H/W side.
Check PM_RXD line
R708
Replace IC3200
NG
NG
NG
NG
NG
NG
OK
OK
OK
OK
OK
Summary of Contents for 65UX340C Series
Page 46: ......