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LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
SW101
RF switch
U110
GSM/WCDMA
Transceiver
(RF3300)
4.21 Checking GSM Block
start
2. Check
VCXO Block
5. Check
RF TX Path
4. Check
Control Signal
Re-download SW, Cal
3. Check
FEM Module
6. Check
RF RX Path
1. Check
VRADA_2V8
VDIGRAD_1V8
Figure 4-19. GSM Block
(Top)
(Bottom)
U102
GSM/EDGE
PAM
(+Ant. SW)