Checking Pll Control Signal - LG KE970 Service Manual

5. Trouble shooting
5.11.7 Shooting of Transmitter Part
Checking Flow
Setup Test Equipment
Cell Power : - 74dBm
EGSM CH30
DCS CH699
Check point
1
VCTCXO
Check point
2
PLL Control
Check point 3
TX I/Q Signal
Check point
4
Transceiver
Check point
5
PAM Control
Check
6
FEM & Mobile
Re-Download S/W & RF
CAL
5.11.8 VCTCXO Circuit
See RX Part "1. Checking VCTCXO Circuit"

5.11.9 Checking PLL Control Signal

See RX Part "2. Checking PLL Control Signal"
Checking Points
6
- 100 -
6
3
2
4
1
5