20-1
IM AQ1200-01EN
Troubleshooting, Maintenance, and Inspection
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App
Index
20
20.1 If a Problem Occurs
Dealing with Unusual Circumstances
• If a message appears on the screen, see the following pages for reference.
• If servicing is necessary or the AQ1200x/AQ1205x does not operate properly even after you have
attempted to deal with the problem according to the instructions in this section, contact your nearest
YOKOGAWA dealer.
Symptom
Solution
Reference
Even when the power is
on, nothing appears on
the screen.
If you are using an AC adapter, make sure that the plug is connected firmly to the outlet,
the power cord is connected firmly to the AC adapter, and the AC adapter’s DC plug is
connected firmly to the AQ1200x/AQ1205x.
—
1
If you are using a battery pack, make sure that it is attached firmly.
—
1
Charge the battery pack, and make sure that the ON lamp is illuminated.
20.8
The LCD turns black at high temperatures. At low temperatures, its display speed becomes
slower. Make sure that the temperature of the area where you are using the AQ1200x/
AQ1205x is within the operating temperature range.
—
1
The display disappears
after time passes.
The AQ1200x/AQ1205x turns off automatically when its battery is low. Check the
remaining battery power.
20.8
If you have specified a time for the Power Save setting, the AQ1200x/AQ1205x will turn
off automatically if no operations have been performed for the specified time. Check the
settings.
19.2
The screen is dark.
The screen is dark when the LCD Brightness setting is set to “Power save.” Check the
settings.
19.2
The LCD may be worn out. Servicing is required.
20.12
When the temperature of the AQ1200x/AQ1205x or its battery pack is high, the AQ1200x/
AQ1205x lowers the LCD brightness automatically to prevent damage. Make sure that the
temperature of the area where you are using the AQ1200x/AQ1205x is within the operating
temperature range.
—
1
The power turns off
automatically while the
AQ1200x/AQ1205x is
being used.
The AQ1200x/AQ1205x turns off automatically when it detects an error. A warning
message will appear when this happens. Read the message. Fix the problem indicated in
the message, and then turn on the AQ1200x/AQ1205x.
20.2
2
The battery pack cannot
be charged.
The battery pack temperature may be too low or too high. Make sure that the temperature
of the area where you are using the AQ1200x/AQ1205x is within the operating temperature
range. Remove the battery pack from the AQ1200x/AQ1205x and let it sit for awhile in a
room temperature environment.
—
1
The battery pack may be reaching the end of its life expectancy. Replace it with a new
one.
20.12
The power turns off
automatically while the
AQ1200x/AQ1205x is
starting.
You may have accidentally pressed the power switch twice.
—
When you turn on the
power, a screen that
prompts you to initialize
the internal memory
appears.
If an improper file operation takes place, the AQ1200x/AQ1205x may not be able to start
correctly and may require internal memory initialization. Follow the instructions on the
screen. Back up necessary files to a PC, and initialize the internal memory.
20.6
1 See the operation guide, IM AQ1200-02EN.
2 When it is likely that the usage limitations of the AQ1200x/AQ1205x will be exceeded, the AQ1200x/
AQ1205x will display a warning message and turn off automatically to prevent damage. For the conditions
under which messages appear, see section 20.2.
Chapter 20 Troubleshooting, Maintenance, and Inspection
