LG G7100 Service Manual page 64

4. TROUBLE SHOOTING
4.3.3 Checking PLL Control Signal
PLL_CLK
PLL_LE
PLL_DATA
PLL_PD
PLL_L
E
PLL_CLK
PLL_DAT
A
Test Points
Figure 4-12
Check PLL_PD
Level is High?
Check PLL_CLK,
PLL_DATA, PLL_LE
Check if there is any
major difference
* Refer or Graph 4-3
Control Signal is OK
See next page to check
ANT SW & Mobile SW
Waveform
Graph 4-3
- 66 -
Checking Flow
No
Download the SW
Yes
No
Similar?
Download the SW
Yes