LG HB620 - Page 113

- 114 -
4. TROUBLE SHOOTING
For testing, Max power of UMT 2100 is needed.
LGE Internal Use Only Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Tx is OK
Check other parts
Check TP3
over 22dBm
?
YES
Check FEM FL101
NO
Check TP 2
over 23dBm
?
YES
Check Duplexer
FL104
Check coupler U104
Check TP1
over 25dBm
?
YES
NO
NO
Check PAM block
U105
Check TP 4
over - 5dBm
Run a FTM program .
Set RF mode to IMT.
Set uplink freq. to 9750 .
Click Tx on and WCDMA set
PA range R1 on.
Set Tx AGC to 410
.
YES
Check a
Current over
500mA
?
NO
Check Tx SAW Filter
FL10
5
YES
NO
Z3X-BOX.COM