Rf Receiver Path Troubleshooting - LG KC780 Service Manual

5.13

RF Receiver path Troubleshooting

5.13.1 RF Receiver part troubleshooting
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Only for training and service purposes
1. Set HP8960 as below
2. Establish Spectrum Analyzer
& Oscilloscope
General Circuits
Troubleshooting
YES
YES
After download S/W,
Calibrate it.
Fig 9 Troubleshooting flowchart of RF Receiver path
START
Active Cell (GPRS)
62ch, 5level (TCH)
62ch, -60dBm (BCH)
Check
FEM Circuit
- 99 -
5. TROUBLE SHOOTING
LGE Internal Use Only