LG GM310 Service Manual page 109

5. Trouble shooting
5.18.3.1 Checking WCDMA Rx part(WCDMA 2100/900)
Checking Flow
Checking Flow
Set RX level = -25 dBm
YES
Check TP1
About -25.5 dBm?
YES
Check TP2 or TP6
About -27 dBm?
YES
Check TP3 or TP7
About -29 dBm?
YES
Change Rx level = -80 dBm
Check TP3 level
YES
Check TP4 or TP8 level
>=(TP3 level+15 dBm)
YES
Check TP5 or TP9 level
>=TP4 level-2 dBm?
YES
Rx Still has problem?
NO
Rx Path is OK
LGE Internal Use Only
- -
NO
Check SW1001
NO
Check FL1001(FEM)
Check FL1004(B7646)
NO
or
FL1007(B7638)
Check U606
NO
(BGA735)
NO
Check FL1002 or FL1006
YES
Check U1004 and U103
GM310f service manual
Checking Point
Comments!!
WCDMA2100 Trouble : TP1~TP5
WCDMA900 Trouble : TP1, TP6~TP9
- 110 - Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
TP9
TP8
TP1
TP6
TP2
TP7
TP3
TP4
TP5