4. TROUBLE SHOOTING
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(1) Check voltage(TP1)
TP1= 3.3V
CHECKING FLOW
Yes
No
Check the U603 Soldering
If soldering is fine
(2) Check voltage(TP2)
TP2= 2.6V
Yes
No
Check the R509 Soldering
If soldering is fine, change U501
Yes
(3) Check
voltage(TP3,TP4)
TP3, TP4= 3.3V
No
Check the R612, R611 Soldering
If soldering is fine, change U603
Working?
Check the U601 Download
No
Yes
Working?
If Download is fine, change U201
FM300 working well !
Yes