LG C1150 Service Manual page 52

(3) Checking PLL Control Signal
Test Points
Checking Flow
Waveform
Graph 4-2(a)
Figure 4-4.
Check TP 401.
Lev el i s High?
Yes
Check S_DATA,
S_CLK, S_EN.
Simil ar?
Check if there is
Any Major Difference
Refer to Graph 3-1
Yes
3-2
Control Signal is OK
See next Page to check
ANT SW & Mobile SW
- 53 -
4. TROUBLE SHOOTING
S_DATA
S_CLK
S_EN
RF_PWR_DWN
No
Download the SW
No
Download the SW
Graph 4-2(b)