LG KF750 Service Manual page 164

TP Command
-mode =4
- WTXC=10700, 1,890,903,542,557
Check Duplex output
(C226)
To Check PAM
output
Check C207
To Check PAM Input
level
Check C206
To Check PAM control
signal from RF3100 (Ylva)
(WPA_BIAS)
Check C212
To Check PAM VCC
BIAS
from DC/DC converter
(VCC_PA)
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Only for training and service purposes
No
23dBm ?
Yes
WCDMA PAM is OK
See the Next page
Level
>2dBm
No
Yes
1.3V ?
No
Yes
3.2V ?
No
Yes
Change The PAM
4. TROUBLE SHOOTING
Level
< -
10dBm?
Yes
Check the WCDMA RF Tx Chip (Ylva)
Check the RF3100
to WCDMA PAM Signal line
Change
the DC/DC
- 165 -
No
Download the SW
& Calibrate
LGE Internal Use Only