LG PX8700 Service Manual page 73

PX8700
4.2.1.9 Chcek Mobile Switch
Test Point
RF OUT RF OUT
U103 U103
RF IN RF IN
Circuit Diagram
RF OUT
RF IN
LG Electronics Inc.
Checking Flow
U103 U103
START START
Check U103 Check U103
IN/OUT Port IN/OUT Port
Refer to Graph 4.2.12 Refer to Graph 4.2.12
Similar ? Similar ?
Relpace U103 Relpace U103
Waveform
YES YES
Mobile Switch Circuit OK. Mobile Switch Circuit OK.
See next page. See next page.
NO NO
RF IN
RF OUT
Graph 4.2.1.9
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