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9. Flow Chart of Troubleshooting
9-
1
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9-1. Baseband
9-1-1. Power ON
'Power On' does not work
Voltage >=3.3V
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Charge the Battery
Clock = 19.2 MHz
Change the TCX200
No
Yes
Yes
Yes
Yes
No
No
Check the current consumption
Check the VBAT Voltage
Check the TCXO clock (TCX200)
Current
consumption
>= 100mA
Current
consumption
>= 30mA
Yes
No
Check the pin3
of
Q
400
Check the UCP300
High
Change the
Q
400
Low
Check the power
VREG_RF1_2.3V
VREG_RF2_1.4V
VREG_MSMC_1.2V
VREG_USIM_2.85V
VREG_TCXO_2.85V
VREG_RFTX2_1.3V
VREG_RFRX2_1.3V
VREG_RFA_2.2V
VREG_MSMP_2.6V
VREG_MSME_1.8V
VREG_GP1_2.85V
VREG_GP2_2.9V
Yes
Change the UCP300
No
END
Check the OSC400
Clock = 32.768 kHz
Yes
Change the OSC400
No
VPH_PWR
= VBAT
No
Yes
Содержание GT-S3370
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