LG FM300 Service Manual page 44

Connect to IAD with LAN cable
(1) Check Output voltage(TP1) (1) Check Output voltage(TP1)
(1) Check Output voltage(TP2)
Check the LD602 Soldering
If soldering is fine, change LD602
LGE Internal Use Only
START
Yes
TP1= 3.3V
Yes
TP2= Low TP2= Low
(When LED turn On)
Yes
Yes Yes
FINISH
No
Check the Soldering U2 Check the Soldering U2
If soldering is fine, replace U2
No
Check the Soldering U2
If soldering is fine, replace U2 If soldering is fine, replace U2
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4. TROUBLE SHOOTING
Only for training and service purposes