LG KF310 Service Manual page 61

4. TROUBLE SHOOTING
LGE Internal Use Only
start
Battery Voltage , higher
Than 3.2V?
YES
Press PWR key
Keypad LED ON ?
YES
TP3004 high to low
When key press ?
VREG _MSMC_1. 2V,
VREG_MSMP_2.7V,
VREG_MSME _1. 8V,
VREG_TCXO_2. 85,
VREG_MSMA_2. 6V power up ?
TP3004 high to low
When key press ?
Change the main board
- 62 -
NO
Change or Charging
The Battery
NO Follow the LED
trouble shoot
Check open pattern of
NO
Power botton
Check Dome sheet
NO
Change the main
board
NO
Check the TCXO and
SLEEP CRYSTAL
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