Iwatsu DS-8814, Operation Manual

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84
Symptom
Power switch turned
ON but LCD does not
light up.
Power turns ON, then
immediately turns OFF.
Insufficient contrast
Signal is input, but no
waveform appears.
No triggering
Check item
Is the power cord connected to the
AC receptacle?
When the power cord was connected
to the AC receptacle, did the power
switch remain ON?
Does the fan motor on the back run?
Is the instrument used within the
operating temperature range (0 to
40
°
C)?
Are the air ventilation holes on both
sides or the exhaust fan motor air
outlet clogged with some objects?
Is the instrument used at too a high
or low temperature?
Is a wrong channel selected?
Is the probe wire disconnected?
Action
Connect the power cord to
the AC receptacle.
Turn OFF the power switch
and then turn it ON again.
If it, does the LCD backlight
may be burnt out. Contact
our service representative.
Use the instrument within
the operating temperature
range.
Remove the obstacle, turn
OFF the power and turn it
ON again after cooling.
Adjust it with CONTRAST in
the DISPLAY menu.
Press the AUTOSET button.
Turn ON the trace display of
the channel to which the
input signal is connected.
Replace the probe.
Press the AUTOSET button.
i. Diagnostic guideline
If this instrument does not work or some abnormality is suspected, check the descriptions
in Table 1.
Table 1 Diagnostic Guideline