LG MG210 Service Manual page 84

Checking PLL Circuit (Tx pass continued)
Checking Points
Checking Flow
Check S_CLK,
S_EN, S_DATA
No
Signal is
Download SW
normal?
Yes
PLL circuit is OK.
See nest page to check
FEM & Mobile SW
Waveform
S_EN
S_CLK
S_EN
S_DATA
S_CLK
S_EN
S_DATA
S_DATA
- 83 -
4. TROUBLE SHOOTING
U403
Control Signal Circuit Diagram
R400
S_CLK
R401
S_EN
R402
S_DATA
RXQN
S_CLK
100
100
100