LG KT520 Service Manual page 162

D. GSM PAM Check
Check Vapc level.
Check if there is any Major
difference.
Refer to Figure 4-44-1
Check GSM/DCS PAM
output power at C114.
GSM Tx path OK. See Next page to check
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Vapc
(PIN 2)
Figure 4-44-1. Test points of GSM/DCS/PCS Tx
GSM>1.5 V?
DCS/PCS>1.3 V?
Yes
GSM:32.0dBm
DCS: 30.0dBm
Yes
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4. TROUBLE SHOOTING
GSM/EDGE
PAM
(+Ant. SW)
U101
No
Redownload SW, Cal
No
Changing GSM PAM
(U101)
LGE Internal Use Only
DCS/PCS Tx
(C114)
GSM Tx
(C114)