3. TROUBLE SHOOTING
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START
No
Check next step
Yes
Check TP1, TP2 High Level ?
(2.5V≤TP1 ≤3.1V)
(1.7V≤TP2 ≤1.9V)
The Problem may be Logic part
Refer to Logic trouble shoot
Replace U1301
NOT GOOD
Check U1301 physical Damage
or soldering condition
OK?
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