Transmitter Troubleshooting; General Instructions For Transmitter (Tx) Troubleshooting - Nokia 2228Arte Service Manual

Transmitter troubleshooting

General instructions for transmitter (TX) Troubleshooting

Please note the following before performing transmitter tests:
• TX troubleshooting requires TX operation.
• Do not transmit on frequencies that are in use!
• The transmitter can be controlled in local mode for diagnostic purposes.
• Remember that re-tuning is not a fix! Phones are tuned correctly in production
Note: Never activate the CDMA transmitter without a proper antenna load. Always connect a 50 Ω
load to the RF connector (antenna, RF-measurement equipment or at least a 2 W dummy load);
otherwise the CDMA Power amplifier (PA) may be damaged.
Cellular band
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RM-377
RF troubleshooting
Issue 1