LG KE800 Service Manual page 75

4. Trouble Shooting
TXON_PA
MODE
VBIAS
PA_LEVEL
Figure 28. GSMK Control Signal
Checking Flow
Check Control Signals
Signals are
Normal ?
Yes
PAM Control Signal is OK.
Check FEM & Mobile SW
Circuit.
TXON_PA
MODE
VBIAS
PA_LEVEL
- 76 -
No
Check
PMB8876(U103)
Figure 29. 8PSK Control Signal