LG LG-X230DS - Checking Transceiver DC Power Supply Circuit Block

LGE Internal Use Only
3. TROUBLE SHOOTING
The MT6169 operating voltages used three voltage sources 1.8V and 1.8V and 2.8V
3.2 Checking Transceiver DC Power Supply Circuit Block
Circuit Diagram
Image
Checking Flow
TP3(2.8V)(C1304)
TP1(1.8V)(C1306)
TP2(1.8V)(C1307)
TP1
TP2
TP3
Main
Bot
U1301
START
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
TP1、TP2 and TP3 are OK
NO
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