LG GS290 - Page 97

- 98 -
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4. TROUBLE SHOOTING
GS290 Operational Description Revision B
LG Electronics 98/136 LGE Property
Figure 26. GSMK Control Signal
Figure 27. 8PSK Control Signal
Check Control Signals
(TP1 TP2 TP3)
TP1(
PA LEVEL
)
T
P2(
TXON PA
)
TP3(PA
MODE
)
TP1(
PA LEVEL
)
TP2(
TXON PA
)
TP3(PA
MODE
)
TP1(
PA LEVEL
)
TP2(
TXON PA
)
TP3(PA
MODE
)
Signals are
N
o
rm
a
l
?
Check
PMB8877(U100)
Yes
No
PAM Control Signal is OK.
See next page to check
FEM & Mobile SW Circuit.
Checking Flow