Service manual

GTC Service Manual
ASUS Proprietary 47
華
華
碩
碩
電
電
腦
腦
10.6
10.6 10.6
10.6 WCDMA Test & Repair Procedure
WCDMA Test & Repair ProcedureWCDMA Test & Repair Procedure
WCDMA Test & Repair Procedure
WCDMA part in M930i, only support band1, its component is much
more than EGG part. The main component is as follows, PA, duplexer,
TX filter, RX filter, coupler, isolator, and RF3100 etc. WCDMA uses code
to distinguish user, each user uses the same frequency, so especially
need to pay attention to the control of power. And then, I will use the
same analytical method of EGG.
The same as EGG, we observe the state of FEM first. Because
WCDMA does not make FDD, there are no R, T, M phenomenon to take
place.
Take WCDMA as an example：
When already connecting to communication tester. No matter TX or
RX are the same.
Both of BS1 and TX_EN are low, only BS2 is high ( ‘1 ’ is 1.8V).