LG FM300 Service Manual page 54

Connect to IAD with LAN cable
LGE Internal Use Only
START
Yes
(1) Check TP1 & TP2 (1) Check TP1 & TP2
Vpp = 1V
Yes
(2) Check TP3 & TP4
Vpp = 1V
Yes
(2) Check TP5 & TP6
Vpp = 1V
Yes
Replace U202
Yes
FINISH
Check the Soldering CN101
No
If soldering is fine, replace f ld f
CN101
No
Check the Soldering U104 &
R137 & R138
No
Check the Soldering U104 &
R133 & R135
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4. TROUBLE SHOOTING
l
Only for training and service purposes