Troubleshooting - Owon PDS5022S User Manual

User's Manual of OWON Colour Digital Storage Oscilloscope

Troubleshooting

1. In the case of that the oscilloscope is still in the black-screen state without any
display after the power is switch on, perform the following Basic Troubleshooting
hints procedure.
Check whether the power connection is connected properly.
Check whether the power switch is pushed down to the designated position.
Restart the instrument after be completed the checks above.
If this product still can not work normally, please get in touch with Lilliput and
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2. After acquiring the signal, carry out the following operations if the wave form of
the signal is not displayed in the screen.
Check whether the probe is properly connected to the signal connecting wire.
Check whether the signal connecting wire is correctly connected to the BNC
(namely, the channel connector).
Check whether the probe is properly connected with the object to be measured.
Check whether there is any signal generated from the object to be measured (the
trouble can be shot by the connection of the channel from which there is a signal
generated with the channel in fault).
Make the signal acquisition operation again.
3. The measured voltage amplitude value is 10 times greater or smaller than the
actual value.
Check whether the channel attenuation coefficient and the attenuation ration of the
probe used in practical application is match.
4. There is wave form displayed, but it is not stable.
Check whether the Source item in the TRIG MODE menu is in conformity with
the signal channel used in the practical application.
Check on the trigger Type item: The common signal chooses the Edge trigger
mode for Type and the video signal the Video. Only if a proper trigger mode is
applied, the wave form can be displayed steadily.
Try to change the trigger coupling into the high frequency suppress and the low
frequency suppress to smooth the high frequency or low frequency noise
triggered by the interference.
5. No Display Responses to the Push-down of RUN/STOP.
Check whether Normal or Signal is chosen for Polarity in the TRIG MODE menu and
the trigger level exceeds the wave form range.
If it is, make the trigger level is centered in the screen or set the trigger mode as Auto.
In addition, with the AUTOSET button pressed, the setting above can be completed
automatically.
6. After the AVERAGE value sampling is set in the ACQU MODE or a longer
duration is set in the DISP MODE, the display rate is slowed down.
It is a normal phenomenon.
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