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LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
Yes
No
TP Command
-mode =4
- WTXC=10700, 1,890,903,542,557
23dBm ?
Check Duplex output
(C115)
To Check PAM
output
WCDMA PAM is OK
See the Next page
Level
< -
10dBm?
No
Download the SW
& Calibrate
Level
>2dBm
Check R110
To Check PAM Input
level
Check the WCDMA RF Tx Chip (Ylva)
Yes
Yes
1.3V ?
Check C111
To Check PAM control
signal from RF3100 (Ylva)
(WPA_BIAS)
Check the RF3100
to WCDMA PAM Signal line
3.2V ?
Check C104
To Check PAM VCC
BIAS
from DC/DC converter
(VCC_PA)
No
No
No
Change
the DC/DC
Yes
Yes
Change The PAM