User Manual

490
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20.5 Troubleshooting
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Problem Check
LED does not light when the unit
is turned on.
Is power cord connected properly?
There is absolutely no variation in
the recorded waveform.
Is the "Pretrigger standby" message displayed?
(When pretriggering is activated, triggering does not
occur until the current waveform is fully captured.)
Has the "Waiting for trigger" message appeared?
Check the trigger settings.
There is absolutely no variation in
the recorded waveform.
Is the measurement range setting appropriate?
Has a low pass filter been set?
Has a vernier setting been set?
Has a offset cancel setting been set?
The printed recording is non-
existent.
Is the recording paper back to front?
Even when the PRINT or the
COPY key is pressed, no data is
printed.
Make sure the destination of the printout created by
pressing the PRINT key or the COPY key is set to
"Internal Printer."
The printed recording is very faint
.
Are you using the correct (thermal) recording paper?
During memory recorder
operation, the apparent frequency
of the recording is much lower
than the expected frequency.
This is likely to be an aliasing error.
Make the time axis range setting faster.
For details, see Section 21.3.2.
Recording lines are dense or
blurred.
Input signal contains ripple components. Make suitable
filter settings at input unit.
Recording lines are duplicated.
When "Dotted line" is selected as the printed line type in
the waveform display color settings, the top and bottom
of the line become separated by a 1-dot gap. With
waveforms that have little variation, this can cause
waveform printing to appear variously as one line or as
two lines. To correct this, select "Solid line" as the
printed line type.
The keys are dead and do not
respond.
Has the unit been put into the key lock condition
(message "KEY LOCK" appeared?
Press the KEY LOCK key to clear the key lock condition
.
Is the unit being remotely controlled
("GP-IB REMOTE" is displayed, if the GP-IB interface is
being used)?
Some channels cannot be used.
Is the number of channels to be used restricted?
The size of a waveform does not
change, even if the input range is
changed.
Has the variable function been enabled?
Disable the variable function.
NOTE
2
0.5 Troubleshooting
If the unit does not seem to operate normally, check the following points
before requesting service.
If none of the above conditions apply, and the cause of the problem is not
understood, try performing a SYSTEM RESET.
All the settings will revert to the factory settings.
For details, see Section 12.6.3.