LG GD580 Service Manual page 149

4. Trouble Shooting
To verify that the phone fulfils requirements on maximum output power.
Set the FDD Test of the Agilent 8960
Set the Maximum Power
Check output power at
the TP4 with antenna
Cable.
Refer to Figure 4-18-10
Check the power at
the TP3 with probe.
Refer to Figure 4-18-9
Check the power at
the TP1 with probe.
Refer to Figure 4-18-7
The U101 will be not operated.
Change the board
LGE Internal Use Only
Yes
TP4
About 22~23dBm?
No
TP3
About 15dBm?
No
TP1
About -6dBm?
No
- 150 -
TP Command
MODE=4
WTXC=9750, 1,754,643,418,568
SYCT=9750
TFTI=9750
TP5
About 19dBm?
No
The L103 will be broken.
Change the L103
Yes
The SW101 has any problem.
Change the SW101
Yes
The U105 has any problem.
You have to check PAM block.
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Yes
RF TX Level is OK
Check next stage
Check the power at
the TP5.Ant with probe.
Refer to Figure 4-18-11
Only for training and service purposes