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Only for training and service purposes
4. TROUBLE SHOOTING
4.3 Trouble Shooting of GSM Part (GSM850/900/1800/1900)
Tx Path
Rx Path
Tx / Rx Path
U201
FL105
U101
U102
FL108
X101
FL106FL103
FL104
SW101
Setup Test Equipment
Cell power = -74dBm
GSM850 CH:190
EGSM900 CH:38
DCS1800 CH:698
PCS1900 CH:661
1. Check VCTCXO
(X101)
2. Check M/S & FEM
(SW101 / FL105)
3. Check Rx Part
4. Check Tx Part
Start
End