4. TROUBLE SHOOTING
- 50 -
Copyright © 2012 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Check TP2& TP3
TP2(High Band),
TP3(Low Band) Signal is OK ?
Replace MT6251 (U100)
No
Mobile SW & PAM is OK.
TP8 Signal is OK?
Replace PAM (U300)
No
Yes
TP8 signal same as TP1?
Replace SW300
No
Yes
Yes
Control Signal is TP4, TP6,
TP7(VLogic,TXEN, BS)OK ?
Yes
Check MT6251
No
Mode
Input Control Bits
VSW_EN TxEN BS
STANDBY 0 0 0
Rx1
1
1 0 0
Rx2
2
1 0 1
Tx_LB 1 1 0
Tx_HB 1 1 1
Rx1 and Rx2 are broadband receive ports and each supports the GSM850, GSM900, DCS, and PCS bands.
EGSM Rx
To Next Page
Loading...
