Check Pcs Rf Tx Saw - LG VX8610 Service Manual

VX8610

4.2.2.4 Check PCS RF Tx SAW

Test Point
Test Point
RF_OUT
F105
RF_OUT
Checking Flow
Checking Flow
Start
Check pin1(TP1)
at F 103 . Referring to
Figure 4 .2 .2(g)
Is it similar?
Check pin 4(TP2)
at F 103 . Referring to
Figure 4 .2 .2(h)
Is it similar?
NO
Replace F 103
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Only for training and service purposes
RF_IN
F103
RF_IN
Check
U111(RFT6150)
YES
RF Tx SAW is
OK
YES
Circuit Diagram
Circuit Diagram
TP2
Waveform
Waveform
RF_IN fed up with CW signal
Figure 4.2.2(g)
Figure 4.2.2(h)
- 81 -
TP1
RF_IN
RF_OUT
LGE Internal Use Only