18-1
IM 701210-06E
Troubleshooting, Maintenance, and Inspection
18
Chapter 18 Troubleshooting, Maintenance, and Inspection
18.1 Troubleshooting
Troubleshooting
• If a message is displayed on the screen, read the succeeding pages.
• If servicing is necessary, or if the instrument is not operating correctly after performing
the corrective actions below, contact your nearest YOKOGAWA dealer.
Problem Probable Cause Corrective Action Reference
Section
The power cannot be Using a power supply outside the Use a correct power supply. 3.4
turned ON. ratings.
Nothing is displayed. The backlight is turned OFF. Press any key. 17.5
The screen colors are not Power cycle the DL750/DL750P while 17.4
appropriate. holding down the RESET key.
The display is odd. The system is abnormal. Power-cycle the DL750/DL750P. 3.4
Keys do not work. The DL750/DL750P is in Press SHIFT + CLEAR TRACE enable –
the remote mode. local mode.
Other causes. Perform a key test. 18.3
If the test fails, servicing is required.
Protected. Press the PROTECT key. 17.6
Trigger does not activate. The trigger settings are not Set the trigger conditions correctly. Chapter 6
appropriate.
Measured values are not Insufficient warm-up. Warm up the DL750 for 30 minutes —
correct. after turning on the power.
Not calibrated. Perform a calibration. 4.6
The probe’s phase has not been Correct the phase properly. 3.7
corrected.
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. Perform a calibration. In addition, 4.6
select Test Item: Carib.Inf. for the self 18.3
test item and execute the self test.
If the measured value is still odd,
servicing is required.
Cannot output to built-in The printer head is damaged or Servicing required. –
printer. worn out.
Cannot save to the specified The medium is not formatted. Format the medium. 13.5
medium.
The medium is write-protected. Release the medium’s write-protect. –
No more free space on the medium. Delete unneeded files or use a new 13.15
medium.
Cannot change settings or The address of the DL750/DL750P Match the address used in the program Communication
control the operation of the used by the program is different to the address of the DL750/DL750P. Interface
DL750/DL750P via the from the specified address. User’s Manual
communication interface.
The interface is not used in a way Use it in a way that conforms to the
(IM701210-18E)
that conforms to the electrical or specifications.
mechanical specifications.
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