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IM 704510-01E
Troubleshooting and Maintenance
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Chapter 14 Troubleshooting and Maintenance
14.1 Troubleshooting
• For the appropriate corrective actions when a message is shown on the screen, see
the next section.
• If servicing is necessary, or if the instrument is not operating correctly after performing
the following corrective actions, contact your nearest YOKOGAWA dealer as listed on
the back cover of this manual.
Problem
Probable Cause
Corrective Action
Reference Section
The power cannot be
Using a power supply
Use a correct power supply.
3.3
turned ON.
outside the ratings.
The fuse is blown.
Check for the cause, and if there is no
14.7
problem replace it with a new fuse.
Nothing is displayed.
The screen is set extremely dark.
Adjust the brightness of the LCD screen.
13.7
The screen is cold.
The ambient temperature should be
–
at least 5
°
C.
The display is odd.
The system is not operating properly. Power-cycle the TA720.
–
Keys do not work.
The TA720 is in the remote mode. Set the TA720 in the local mode.
*
Cannot make
Incorrect trigger level.
Set a proper trigger level.
6.6
measurements.
Measurement channel is not selected. Check the channel.
5.2 to 5.8
Exceeding measurement range.
Check the measurement range.
5.2 to 5.8
Incorrect arming setting.
Check the arming setting.
6.3
Incorrect inhibit setting.
Check the inhibit setting.
6.4
Incorrect reference signal.
Check the reference signal.
6.8
Cannot save to the
The storage medium is not
Format the storage medium.
11.3
specified medium.
formatted.
The storage medium is not properly Insert the storage medium properly.
11.1, 11.2
inserted.
The storage medium is
Remove the write-protection.
–
write-protected.
Insufficient free space on the storage Delete unneeded files or use another
11.7
medium.
storage medium.
Attempted to save while the
Save after the measurement completes or 11.4 to 11.6
measurement is in progress.
stop the measurement.
Cannot load from the
The storage medium is not properly Insert the storage medium properly.
11.1, 11.2
specified medium.
inserted.
Attempted to load while the
Load after the measurement completes or 11.4 to 11.6
measurement is in progress.
stop the measurement.
is blinking at the top right The lithium battery is dead.
Perform a self test.
14.4
corner of the screen.
The system is not operating properly.
Cannot print to the built-in
The roll paper is not installed.
Install the roll paper.
11.11
printer.
The release arm position is incorrect. Move the release arm to the HOLD
11.11
position.
The printer head is damaged or
Servicing required.
–
has worn out.
Attempted to print while the
Print after the measurement completes or
11.12
measurement is in progress.
stop the measurement.
Unable to recognize the
Incorrect format on the storage
Format the storage medium.
11.3
medium.
medium.
The storage medium is damaged.
–
–
Cannot change settings or The address of the TA720 used by Match the address.
*
control the operation of the the program is different from the
TA720 via the
specified address.
communication interface.
The interface is not used in a way
Use it in a way that conforms to the
*
that conforms to the electrical or
specifications.
mechanical specifications.
* See the Communication Interface User’s Manual (IM704510-17E).
