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