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Flow Chart of Troubleshooting
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7-19
7-12. GSM Transmitter
Yes
Check U302
(MSM6250)
END
No
No
No
No
Yes
Yes
Yes
Yes
Resolder U106
(ASM)
Resolder U105(PAM)
U106(ASM)
pin22
>= 23dBm
U105(PAM) pin6
>= 26dBm
OSC101(TXVCO)
pin1
>= 2dBm
Resolder OSC101
(TXVCO)
TX ON (5 Level)
Resolder U105
(PAM)
U105(PAM) Pin45
>= 1V