LG LG-X230DS - Checking Connectivity DC Power & TCXO Circuit

LGE Internal Use Only
3. TROUBLE SHOOTING
Circuit Diagram
Checking Flow
Image
3.6. 1. Checking Connectivity DC Power & TCXO Circuit
3.6 Connectivity PART
TP1(3.3V)
TP3(1.8V)
TP2(2.8V)
TP4(26MHz)
U1201
Main
Top
TP4
TP3
TP1
TP2
Battery voltage
higher than 3.5V?
Change or charging
the Battery
Check power on
YES
YES
NO
NO
Reset software
Check Software setting
Re-solder or change U401
YES
Check TP1~4 output and input
NO
START
Connectivity is OK
Re-solder or change
R1204/1205/1206/1207
NO
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