HUAWEI TECHNOLOGIES CO., LTD.
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4.12.2 Troubleshooting Signal Faults
The transmitting and receiving circuits can all cause poor signal. If the main board test is passed,
the cause of an SMT problem can be excluded. Check whether the antenna plate is correctly
and effectively connected with the main board. Also check whether the antenna switch is faulty
and the antenna matching circuit is correct.
4.12.3 Maintenance Instances
The signal was weak. The main board calibration was not faulty. The antenna plate was
corrected so that it was connected fully to the main board. Searching the network again showed
that the problem was removed.
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