LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
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4.7.2 Checking WCDMA PAM Control Block
• PAM control signal
1. PWR_DET : UMTS Tx Power Detected value (Check R119)
2. TX_AGC_ADJ : UMTS RTR6275 Tx Amp Gain Control
3. +VPWR : UMTS PAM Main Voltage ( 3V < +VPWR < 4.2V)
4. PA_ON1 : Enable W850 band (C163)
5. PA_ON2 : Enable W1900 band (C174)
6. PA_R1 : Control signals that step the active PA mode and bias
WCDMA
850&1900 Coupler
PWR_DET
(R119)
+VPWR
PA_ON2 : W1900 enable
(Check C174)
PA_ON1 : W850 enable
(Check C163)
WCDMA Dual PAM (W850 & W1900)
[Fig 4.7.2.1] Test point of the WCDMA PAM Block
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