3. TROUBLE SHOOTING
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Only for training and service purposes
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3.11 Power
Battery voltage higher
than 3.5V ?
START
Press power key, R11006(TP1) is LOW?
Replace Main Board
Check VREG level of PM8841
Check VREG level of PM8941
Check the clock (X4100)
19.2MHz?
Check that PON_RESET_N
(TP4101) is 1.8V
MSM_PS_HOLD(R4103)
is High?
Change / Charging the Battery
U4100(Check PM8941)
U4200 (Check PM8841)
S1B(TP2_C4205) S2B(TP3_C2303)
Check the pins(X4100)
U4100(Check PM8941)
U2100(Check MSM8974)
Check POWER_KEY (dome key)
Check the connection
of CN11003 (Key FPCB CN.)
No
No
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
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