4. TROUBLE SHOOTING
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(1) Check Output voltage(TP1)
TP1= 3.75V
No
Check the Soldering U1
If soldering is fine, replace U1
START
Yes
(2) LQI_LED0 is high and
Red LED turn on?
No
Check the Soldering
Q305&R355&LD304
If soldering is fine, replace
Q305 or LD304
Yes
(2) LQI_LED1 is high and
Green LED turn on?
Yes
No
Check the Soldering
Q306&R353&LD304
If soldering is fine, replace
Q306 or LD304
FINISH