4. TROUBLE SHOOTING
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Battery voltage higher than
3.70V(OCV)?
Change or charging the Battery
No
Yes
Redownload SW image
TP1(R734) high to
when key press?
Check correctly working powerkey
No
Yes
TP (VRGEG_MSMC1_1.5V), TP3
(VREG_MSMC_1.5V), TP4(VREG_MSMP_.6V),
TP5 (VREG_MSME_1.8V), TP6 (VREG_MSMA_.6V)
TP7 (VREG_TCXO_.85V),
power up?
Change the Main board
No
Yes
Is clock ok?
TP8 (X10) : 19.M
Change the Main board
No
Yes
4.10 Power ON Trouble Shooting
Power On sequence of E510 is :
Power key press
→
KPD_PWR_N go to low
→
PM7540 Power Up
→
VREG_MSMC1_1.V(C431),
VREG_MSMC_1.V(C43), VREG_MSME_1.8V(C433), VREG_MSMP_.7V(C454), VREG_MSMA_.6V(C453),
VREG_TCXO_.85V(C458) power ON
→
Phone booting and PS_HOLD(D40) go to High