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Copyright © 2010 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
4. TROUBLE SHOOTING
5.Trouble Shooting
(RF)
Check TP 1
If EGSM /GSM 850 over 31 dBm ?
If DCS /PCS over 28 dBm ?
Check soldering and
components
Start
Check TCXO Block
Refer to 4.3
N
o
Check TP 2, 3
If EGSM /GSM 850(TP2) under 6
dBm ?
If DCS /PCS (TP3) under 6 dBm ?
N
o
Change the board
Yes
EGSM /DCS /PCS /GSM 850
Tx is OK
Check other part
Check FEM Block
(EDGE PAM )
Refer to 4.4
Yes
Check RTR & PAD
No Problem
N
o
Still exist Problem
For testing , Max power output is needed
109P
Содержание GD88O
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