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Flow Chart of Troubleshooting
9-39
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9-2-9. Abnormal GSM850/EGSM Tx Operation
④
③
①
②
TX ON(5 level)
YES
Resolder RFS200,
L202, C203
F200 PIN2
≥
-5dBm
Check Antenna
Switch Control
NO
Check F200
PIN3=H, PIN4=L
PIN5=L, PIN6=L
YES
F200 PIN11
≥
-15dBm
Resolder or Change
F200
YES
NO
Resolder
L204,C215,C216
U200 PIN9
≥
-15dBm
YES
NO
Resolder U200,
C212, R200,
R202, R203
U201 PIN55
≥
-15dBm
YES
NO
END
Check U201,
UCP400
NO