LG GD310 Service Manual page 98

LBAND_PAM_IN (MODE: GMSK) : TP1
EGSM 30CH
Figure 22. Transceiver Output (GMSK)
Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Checking Flow
Check Output Signal
(TP1, TP2)
Signals are
Normal ?
Yes
Transceiver is OK.
See next page to check
PAM Control Circuit.
- 99 -
5. TROUBLE SHOOTING
Replace
N
PMB6272(U400)
LBAND_PAM_IN (MODE: 8PSK) : TP1
EGSM 30CH
Figure 23. Transceiver Output (8PSK)
LGE Internal Use Only