Troubleshooting, Maintenance, and Inspection
18-1
IM 701310-01E
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App
Index
18.1  If a Problem Occurs
Faults and Corrective Action
•  If a message appears on the screen, read the following pages.
•  If service is required, or the corrective action does not solve the problem, refer to your 
supplier.
Description Probable Cause  Corrective Action Reference 
Section
The power cannot be 
turned ON.
Using a power supply outside the ratings. Use a correct power supply. 3.3
Nothing is displayed. The backlight is turned OFF. Press any key. 8.8
The screen colors are not appropriate. Turn the power OFF, and then turn the 
power ON again while pressing the 
RESET key.
4.4
The display is odd. The system is not operating properly. Power-cycle the DL9000. 3.3
Keys do not work. The keys are malfunctioning. Perform a key test.
If the test fails, servicing is required.
18.3
Trigger does not activate. The trigger settings are not appropriate. Set the trigger conditions correctly. Chapter 6
Measured values are not 
correct.
Insufficient warm-up. Warm up the DL9000 for 30 minutes 
after turning on the power.
−
Not calibrated. Execute calibration. 4.8
The probe’s phase has not been 
corrected.
Perform phase correction correctly. 3.5
The probe attenuation is not correct. Set an appropriate value. 5.6
An offset voltage is added. Set the offset voltage to 0 V. 5.10
Other causes. Execute calibration.
If the measured value is still odd 
servicing is required.
4.8
Cannot output to the built-
in printer.
The printer head is damaged or worn out. Servicing required. −
Cannot save to the 
specified medium.
The medium is not formatted. Format the medium. 18.6
No more free space on the medium. Delete unneeded files or use another 
storage medium.
−
Cannot change settings 
or control the operation 
of the DL9000 via the 
communication interface.
The address of the DL9000 used by the 
program is different from the specified 
address.
Match the address used in the program 
to the address of the DL9000.
Communication 
Interface User’s 
Manual
(IM 701310-17E)
The interface is not used in a way that 
conforms to the electrical or mechanical 
specifications.
Use it in a way that conforms to the 
specifications.
Chapter 18  Troubleshooting, Maintenance, and Inspection