LG LG-X230DS - 3 Trouble Shooting; Troubleshooting; Checking XO Block

LGE Internal Use Only
3. TROUBLE SHOOTING
The out put frequency(26.0MHz) of XO(X1302) is used as the reference one of MT6169 internal VCO
3.1 Checking XO Block
Checking Flow
TP1 (X1302)
TP1 (X1302)
Circuit Diagram
Image
Main
Bot
U1301
START
Battery voltage
higher than 3.5V?
Change or charging
the Battery
Check VCC
YES
YES
NO
NO
Re-solder or change X1302
，U1301
Check Clock(TP1)
Re-solder or change U401
YES
The frequency is OK
NO
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