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8. Level 3 Repair
8-4-1. POWER ON
Tablet Phone don`t power on.
Check the Battery Voltage >
3.4V ?
No
Charging the battery by TA
its voltage level extremely low(under 3.3V)
Change the battery
Check the U4006 output
voltage
(C4054 >= 3.4V)
Check the R4028, R4026
Power-on the phone and
check the power-on sound
or light on touch key sound is
ok ?
No
No
No
No
YES
YES
YES
YES
Change the LCD Module
Change the Material
And retry to the power-on operation.
If the output voltage is not satisfied
with normal
Chage the OCS4000
Check the initial operation
END
Check the OSC4000 is that frequency 19.2MHz