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Flow Chart of Troubleshooting
7-13
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7-2. RX
7-2-1 CDMA/PCS mode
START
CDMA/PCS mode
SVC &
ROAM OK?
Check CDMA/PCS
Rx Path
Call OK?
DVGA value
Check OK?
Tx Path
Check OK?
Adjust DVGA by
program
S1M8690X(U400)
Check Adjust TX by
program
FER OK?
Check RFR6000(U302),
MSM6500(U101)
End
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
1. visual check! (soldering)
2. S/W Mode Check : CDMA Mode Check
3. OSC302 Check : 19.2MHz
4. VCO(OSC301) voltage/frequence level check
Frequence : 1715MHz < f < 1788MHz
Supply Voltage:
2.75 ± 0.1V
Control Voltage:
0.4 ~ 2.3V
5. U301 LNA gain check
6. U403, U404 Check