Yokogawa Button Operated MV2000 - Manual (Page 11)

2-1
Troubleshooting
SM MV1000-01E
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2.1 Failure Analysis Flow Chart
When a failure occurs, refer to the flow chart below for corrective actions.
See No. 5 of the checklist
in section 2.2.
See No. 1 of the checklist in
section 2.2.
Has the backlight gone out due
to the LCD’s backlight saver?
Other than the display,
is the instrument functioning
normally?
Is an appropriate power
supply being input?
Is the power supply wired
correctly?
Is the power switch* ON?
Does the switch operate
normally?
Doesn’t function at all
(nothing is displayed)
Turn the switch ON correctly.
Wire it correctly.
Supply power of voltage and
frequency that conforms to
the specifications.
Restore the original brightness
through key operation.
Try replacing the backlight.
YES
NO
YES
NO
YES
NO
YES
NO
NO
YES
NO
YES
Has the instrument
been operated longer than the
recommended replacement period
for the backlight (5 years)?
Chapter 2 Troubleshooting