Gsm Transmitter - Samsung SGH-Z140 Service Manual

Flow Chart of Troubleshooting

7-12. GSM Transmitter

TX ON (5Level)
Yes
U102(PAM) Pin20
>= 1V
Yes
OSC101(TXVCO)
pin1
>= 2dBm
Yes
U102(PAM) pin11
>= 20dBm
Yes
U103(ASM)
pin22
>= 25dBm
Yes
Check U301
(MSM6250)
END
No
No
No
No
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Resolder U102
(PAM)
Resolder OSC101
(TXVCO)
Resolder U102(PAM)
Resolder U103
(ASM)
7-18