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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.