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4. TROUBLE SHOOTING
D. GSM PAM Check
GSM850/EGSM:32.0dBm
DCS/PCS: 30.0dBm
Yes
Changing GSM PAM
(U100)
Check GSM850/EGSM/DCS/PCS
PAM output power at C111.
GSM Tx path OK. See Next page to check
Check Vapc level.
Check if there is any Major
difference.
Refer to Figure 4-44-1
Yes
No
Redownload SW, Cal
GSM850/EGSM>1.5 V?
No
Figure 4-44-1. Test points of GSM850/EGSM/DCS/PCS Tx
DCS/PCS>1.3 V?
GSM/EDGE
PAM
(+Ant. SW)
U101
GSM850/EGSM/
DCS/PCS Tx
(C125)
Vapc
(PIN 52)
(Bottom)
(Top)
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