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5. Trouble shooting
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Signals are
Normal ?
Check
PMB8888(U10
2)
Yes
No
PAM Control Signal is
OK.
See next page to check
FEM & Mobile SW Circuit.
Check Control Signals
(
TP1
,
TP2, TP3)
TP3(PA MODE) : R616
TP1(TX_RAMP) : R612
TP2(PA_EN) : R614
TP1
(
TX RAMP
)
TP2
(
PA EN
)
TP3
(
PA MODE
)
TP1
(
TX RAMP
)
TP2
(
PA EN
)
TP3
(
PA MODE
)
TP1
(
TX RAMP
)
TP2
(
PA EN
)
TP3
(
PA MODE
)
GSMK Control Signal 8PSK Control Signal