LG MX8550 Service Manual page 62

MX8550
4.2 Tx Part Trouble
4.2.1 DCN Tx
Press "##5473784236368" + "SEND" key + "000000" in
Phone idle state.
? Press "5" to enter FCC Test
? Press "2" to enter CDMA FCC mode
- Set channel to 384 and AGC to 360
? Measure frequency domain waveform with Spectrum
analyser
? Measure time domain waveform with Oscilloscope
1. Check
DC Power Supply circuit
2. Check
VCTCXO
3. Check
RFT6150
LG Electronics Inc.
Mobile S/W
DCN_Tx
SAW filter
Dual PAM
VCTCXO
RFT6150
Checking Flow
Checking Flow
Start
Test Point
Test Point
Diplexer
DCN_Duplexer
4. Check
RF SAW
5. Check
RF Dual PAM
6. Check
Duplexer
7. Check
Diplexer
NO
8. Check
Mobile Switch
Redownload S/W, Cal
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