Data Sheet

16 Troubleshooting RIGOL
MSO4000/DS4000 User’s Guide
16-1
16 Troubleshooting
Some commonly encountered failures and their solutions are listed below. When you
encounter those problems, please solve them following the corresponding steps. If
the problem remains still, please contact RIGOL and provide your device
information (Utility  System  System Info).
1. The screen is still dark (no display) after power on:
(1) Check whether the power is correctly connected.
(2) Check whether the power switch is really on.
(3) Check whether the fuse is burned out. If the fuse needs to be changed,
please return the instrument to the factory and the RIGOL authorized
personnel will change the fuse for you.
(4) Restart the instrument after finishing the above inspections.
(5) If it still does not work correctly, please contact RIGOL.
2. The signal is sampled but no waveform of the signal is displayed:
(1) Check whether the probe is correctly connected to the item to be tested.
(2) Check whether there are signals generated from the item to be tested (you
can connect the probe compensation signal to the problematic channel to
determine which has problem, the channel or the item to be tested).
(3) Resample the signal.
3. The tested voltage amplitude is greater or lower than the actual value
(note that this problem usually occurs when probe is used):
Check whether the attenuation coefficient of the channel complies with the
attenuation ratio of the probe.
4. There is waveform display but not stable:
(1) Check the trigger signal source: check whether the Source item at the
trigger panel complies with the signal channel actually used.
(2) Check the trigger type: general signals should use “Edge” trigger and video
signal should use “Video” trigger. Only when the proper trigger type is used,
can the waveform be displayed stably.
(3) Check the trigger level: adjust the trigger level to the middle position of the