Tx Trouble - LG C1100 Service Manual

4.2 TX Trouble

Test Points
Checking Flow
4
1
2
6
START
HP8922 : Test mode
62 CH, 7 level setting (TCH)
62 CH, -60dBm setting (BCCH)
Spectrum analyzer setting
Oscilloscope setting
1. Check
Regulator Circuit
2. Check
VCTCXO Circuit
3. Check
Control Signal
- 51 -
5
3
Figure 4-8.
4. Check
TX IQ
5. Check
PAM Control Signal
6. Check Ant SW &
Mobile SW
Redownload SW, CAL
4. Trouble Shooting