3. TROUBLE SHOOTING
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START
No
No
No
No
OK?
Check next step
Check TP1 2.7V OK?
Check High Level
of each mode ?(1.5V≤TP2 )
Check TP3 Signal exist?
Check TP4 Signal exist?
Check Transceiver physical damage
or soldering condition
The Problem may be Other part
Check Logic part
The Problem may be Other part
Check Logic part
Check FL1111 Soldering
Check FL1212 Soldering
Replace U1500
Yes
Yes
Yes
Yes
Not good