Asus M930 Service Manual download pdf (Page 54)

GTC Service Manual

ASUS Proprietary 54

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10.9 WCDMA

10.9 WCDMA 10.9 WCDMA

10.9 WCDMA Test & Repair Procedure

Test & Repair ProcedureTest & Repair Procedure

Test & Repair Procedure

No

WCDMA Board Level

Repair

Procedure

Check power detector system (U910 and

Tx

Rx

C

heck

r

elevant

c

omponents

on

Check R912 power

No

Change U906 RF3100

Restart WCDMA Board Level Repair

Proced

ure

Recalibration

Check C927 power

YES

Check U905, U904, and U900 by

relationship.

YES

No

Check power supply system (R905 and

Check

1. C905 and L901 are 3.15V

2. R909, R900 are 2.75V and R919 is 1.8V

3. R800 is 26MHz

Check L900 and RX filter

Tx or Rx path fail

FEM has waveforms

R920 has power

PA output has power

normal

YES

YES

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