LG GB220 - Page 68

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Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
4. TROUBLE SHOOTING
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
CHECKING FLOW
Check TP1 of SW400
TP1 Signal is OK?
Replace Mobile SW (SW400)
Yes
No
Yes
Mobile SW & TX Module is OK.
Check PMB8810
Control Signal is
(VLogic, BS1,
BS2)OK ?
No
Yes
Check TP4 of U400 ?
Replace FEM (U400)
TP2(High Band),
TP3(Low Band)
Signal is OK ?
No
Yes
EGSM Rx
M o d e V L O G I C T x _ E N B S 1 B S 2
S t a n d b y
0XXX
R x 1
( G S M 8 5 0 )
1000
R x 2
( E G S M )
1001
R x 3
( D C S )
1011
R x 4
( P C S )
1010
L B _ T x
110X
H B _ T x
111X