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Inspection and Cleaning
Section 7-4
7-4 Inspection and Cleaning
Clean and inspect the NT20S regularly to ensure that it is always used in its opti-
mum condition.
Cleaning Method If the display is dirty the screen is difficult to see. Clean the screen from time to
time as follows.
S In daily cleaning, wipe the display with a soft dry cloth.
S If the soiling cannot be removed with a dry cloth, wet the cloth with water, wring it
out well and wipe the display with it.
S If rubber or vinyl products, tape, etc. are left stuck to the display for long periods
they will cause staining. If such items are stuck to the display, remove them dur-
ing cleaning.
Note: Never use volatile solvents such as benzene or thinners, or dusters.
Inspection Method In normal environments, inspect the NT20S at intervals of between 6 months and
a year. In environments that are extremely hot and humid, or very dusty environ-
ments, shorten the inspection interval.
S Items required for the inspection
Prepare the following items before starting the inspection.
- The tools supplied with the NT20S
- Screwdrivers (Philips, flat-head)
- Tester (or digital voltmeter)
- Industrial alcohol
- 100% cotton cloth
- Hygrometer (required in some cases)
- Thermometer (required in some cases)
- Synchroscope (required in some cases)
- Pen-writing oscilloscope (required in some cases)
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