Asus M530w Service Manual page 80

華 碩 電 腦
華 碩 電 腦
The detail steps of debug are listed as follows.
a. Spectrum analyzer connects with a high impedance probe. Execute GSM
debug tool and set parameters in the above table.
b. Use the high impedance probe to sequentially measure RF power of test
points on GSM Tx path, including antenna pad, C972, duplexer (U956) Pin1,
C947, C969 Pin1, C955, L851 Pin1, and L864. Furthermore, the signals of
C969 Pin1 and L851 Pin1 are both DC signals instead. Corresponding locations
are shown in "4. RF Tx/Rx Path and Test Points." Moreover, measurement
error of RF power on each test point is unavoidable due to measurement skills
and methods of using high impedance probe. After probing sequential test
points, the probable defect component should be checked that DC power is
supplied for this component at proper voltage level.
TSD ■ Lv3Lv4 Repair Manual
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