Asus M930 Service Manual download pdf (Page 47)

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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).

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Asus M930 Service Manual Page 47