Checking Transceiver Dc Power Supply Circuit Block - LG -X230DS Service Manual

3.2 Checking Transceiver DC Power Supply Circuit Block

The MT6169 operating voltages used three voltage sources 1.8V and 1.8V and 2.8V
Checking Flow
START
Battery voltage
higher than 3.5V?
YES
Check power on
YES
Check Software setting
YES
TP1、TP2 and TP3 are OK
LGE Internal Use Only
NO
TP2(1.8V)(C1307)
Change or charging
the Battery
NO
Re-solder or change
U401
NO
Reset software
TP1
TP2
Circuit Diagram
13
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3. TROUBLE SHOOTING
Image
TP3
U1301
Main
Bot
TP3(2.8V)(C1304)
TP1(1.8V)(C1306)