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Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
5. Trouble shooting
- 77 -
START
Assemble
Re
p
lace Main Board
Replace U303 of
main -board
Yes
Check Speaker tension and
Contacts are clear
.
No
No
Replace Main PCB
Re
p
lace Receiver
Check the soldering status
Of U303 of main -board
Y
es
Input Signal ( TP1,
TP2) is Low(0V)?
Output Signal( TP3,
TP4) is Low(0V)?
TP3
TP4
TP3
TP4
Receiver Signal( TP5,
TP6) High(1.6V)?
TP5 TP6