74
VX8350
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
4.2.2 PCS Tx
Test Point
Test Point
Mobile S/W
Triplexer
DCN_Duplexer
RFT6150
VCTCXO
PCS PAM
PCS_Tx
SAW filter
Circuit Diagram
Circuit Diagram
1. Check
DC Power Supply circuit
2. Check
VCTCXO
Press ##5473784236368 + SEND key + 000000 in
Phone idle state.
→ Press
5 to enter FCC Test
→ Press
2 to enter PCS FCC mode
- Set channel to 600 and AGC to 360
→ Measure frequency domain waveform with Spectrum
analyser
→ Measure time domain waveform with Oscilloscope
Start
6. Check
PCS Duplexer
Redownload S/W, Cal
NO
7. Check
Triplexer
8. Check
Mobile Switch
3. Check
RFT6150
5. Check
PCS PAM
4. Check
PCS RF SAW
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