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LGE Internal Use Only Copyright © 2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
4. TROUBLE SHOOTING
Yes
No
TP Command
-mode =5
- WTXC=9750, 1,754,643,418,568
22dBm ?
Check Duplex output
(L601, C152)
To Check PAM
output
WCDMA PAM is OK
See the Next page
Level
< -10dBm?
No
Download the SW
& Calibrate
Level
>2dBm
Check R162, R152
To Check PAM Input level
Check the WCDMA RF Tx Chip (RF3300)
Yes
Yes
1.1V at
Po_max?
Check C115, C157
To Check PAM control signal
from AB3100
(Bias_CTRL)
Check the RF3300
to WCDMA PAM Signal line
3.4V ?
Check C103, C155
To Check PAM VCC BIAS
from DC/DC converter
(VCC_WPA)
No
No
No
Change
the DC/DC
Yes
Yes
Change The PAM
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