LG GT500 Service Manual page 164

D. GSM PAM Check
GSM850/EGSM/
DCS/PCS Tx
(C125)
(Bottom)
Check Vapc level.
Check if there is any Major
difference.
Refer to Figure 4-44-1
Check GSM850/EGSM/DCS/PCS
PAM output power at C111.
Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Figure 4-44-1. Test points of GSM850/EGSM/DCS/PCS Tx
GSM850/EGSM>1.5 V?
DCS/PCS>1.3 V?
GSM850/EGSM:32.0dBm
DCS/PCS: 30.0dBm
GSM Tx path OK. See Next page to check
(Top)
GSM/EDGE
(+Ant. SW)
No
Yes
No
Yes
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4. TROUBLE SHOOTING
Vapc
(PIN 52)
PAM
U101
Redownload SW, Cal
Changing GSM PAM
(U100)
LGE Internal Use Only