LG GB160 Service Manual page 86

PAM Trouble
Signal configuration
M ode
TXON_PA (TP9)
BS (TP8)
VLOGIC (TP10)
CHECKING FLOW
EGSM900 TX
H(2.7V)
L
H(2.7V)
Check control signal (TP8,9,10)
PAM Control Signal is OK?
See next page to check Mobile
swich(sw) Circuit.
TP8
TP9
TP10
DCS 1800 TX EGSM900 RX
H(2.7V)
H(2.7V)
H(2.7V)
Check
U103
86
DCS18 00 RX
L
L H(2.7V)
H(2.7V) H(2.7V)
L