3. TROUBLE SHOOTING
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Only for training and service purposes
LGE Internal Use Only
3.11 Power
Battery voltage higher
than 3.5V ?
START
Press power key, TP1(R217) is LOW?
Replace Main Board
Check VREG level of PM8841
Check VREG level of PM8941
Check the clock (X6000)
19.2MHz?
Check that PON_RESET_N
(TP6000) is 1.8V
MSM_PS_HOLD(R6030)
is High?
Change / Charging the Battery
U6001(Check PM8941)
U7000 (Check PM8841)
S1B(TP1_C7008) S2B(TP2_C4000)
Check the pins(X6000, R6042)
U6001(Check PM8941)
U3000(Check MSM8974)
Check POWER_KEY (dome key)
Check the connection
of CN307 (Touch FPCB CN.)
No
No
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes