Asus P552W Manual page 62

華 碩 電 腦
華 碩 電 腦
GTC ■ Service Manual
● C1831/C1821/C1810
Check whether FEM (U1804) operates normally or not. U1804
needs to be replaced if improper RF power, no power or lower power
than that on the golden sample, is measured on C1831, C1821, and
C1810. C1831 is the test point for GSM900 band. C1821 is the test
point for DCS1800 and C1810 is the test point for PCS1900 band.
The following figures, which sequentially indicate measurement
result of GSM900 on C1831, DCS1800 on C1821 and PCS1900 on
C1810, are examples of RF signal measurement on the spectrum
analyzer.
<GSM900>
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