Service manual

GTC Service Manual
ASUS Proprietary 50
華
華
碩
碩
電
電
腦
腦
Check Duplexer output (R920)
Pay attention to this value only for confirming whether the component is normal, does not
represent real power value.
In TX part, the main components are all passive, except PA and
RF3100. So must especially discuss the operation principle of PA finally.
This is divided into two parts：One is power supplied and the other is
power detector.
DC/DC converter is used to reduce WCDMA power consumption.
VCC _ PA is divided into two pieces of power：One is VCC1 (3.15V) for
driving amplifier and the other is VCC2 (3.15V) for power amplifier.