LG KU580 Service Manual - Page 139

4. TROUBLE SHOOTING To verify that the phone fulfils requirments on maximum output power. Set the FDD Test of the Agillent 8960 Set the Maximum Power TP Command MODE=4 WTXC=10700, 1,890,903,542,557 SYCT=10700 TFTI=10700 Check output power at the SW100 with antenna Cable. Refer to Figure 4-33-1 Check the power at the C112 with probe. Refer to Figure 4-33-2 Check 1 Yes About 22~23dBm? No Check 2 Yes About 15dBm? RF TX Level is OK Check next stage The SW100 has any problem. Change the SW100 Check the power at the C113.Ant with probe. Refer to Figure 4-33-3 Check the power at the IS100.2 with probe. Refer to Figure 4-33-4 Check the power at the IS100.3.I with probe. Refer to Figure 4-33-5 No Check 3 About 19dBm? No Check 4 About 19dBm? No Check 5 About 17dBm? Yes The C112 will be broken. Change the C112 Yes The C113 has any problem. Change the C113 Yes The IS100 has any problem. Change the IS100 Check the power at the R110 with probe. Refer to Figure 4-33-6 No Check 6 About -6dBm? No Yes The U100 has any problem. You have to check PAM block. The U104 will be not operated. Change the board LGE Internal Use Only - 140 - Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes