LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4.4.3 Checking UMTS PAM Control Block
• PAM control signal
1. PWR_DET : UMTS Tx Power Detected value (Check R103)
2. TX_AGC_ADJ : UMTS RTR6275 Tx Amp Gain Control
3. VREG_RF_2.85V : UMTS PAM enable (about 2.85V)
4. VREG_W_PA : UMTS PAM Main Voltage ( 3V < VREG_W_PA < 4.2V)
4. TROUBLE SHOOTING
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R103
UMTS850
Coupler
UMTS1900
Coupler
VREG_W_PA
(Q102, pin3)
VREG_W_PA
(C72)