8722ES开机故障 phase lock lost
It depends on the cause of the problem. There could be 2 different causes:
1) The main oscillator is failing to operate at high frequency: If this is the problem then the unit must go to a service center to be fixed
2) The main oscillator tuning curve has drifted over time, so the old factory calibration is no longer valid. There are some source pre-tune service tests that you can run which might be able to re-align the unit.
Look in the service menu for a few source pre-tune service test.
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