Flow Chart of Troubleshooting
SAMSUNG Proprietary-Contents may change without notice
7-13
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7-2-2 Check TX path
Check TX path
Yes
TX signal
(824.64~848.37MHz)
exist at U400 pin23 ?
Check U400 pin12
and its neighboring circuits
No
Yes
Check Gain Characteristics
RFT6122(U400),RF SAW(F400),Power
Amp(U447),Duplexer(F401)
Check TX path
Yes
TX signal
(824.64~848.37MHz)
exist at U400 pin23 ?
Check U400 pin12
and its neighboring circuits
No
Yes
Check Gain Characteristics
RFT6122(U400),RF SAW(F400),Power
Amp(U447),Duplexer(F401)