LG KP500 - Page 105

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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
Check Cont rol Signals
(
TP1
,
TP2
,
TP3
)
TP3(PA MODE) : R605
TP1(PA_LEVEL) : R403
TP2(TXON_PA) : R602
Signal s are
Normal ?
Check
PMB8877(
U100)
Yes
No
PAM Con t r o l Signal is
OK.
See next page to chec k
FEM & Mobile SW Circuit.
TP3(PA MODE) : R605
TP1(PA_LEVEL) : R403
TP2(TXON_PA) : R602
TP1
(
PA LEVEL
)
TP2
(
TXON PA
)
TP3
(
PA MODE
)
TP1
(
PA LEVEL
)
TP2
(
TXON PA
)
TP3
(
PA MODE
)
TP1
(
PA LEVEL
)
TP2
(
TXON PA
)
TP3
(
PA MODE
)
Figure 26. GSMK Control Signal Figure 27. 8PSK Control Signal
Checking Flow