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Preventive maintenance
7.5
Display module
This section is about cleaning of the outmost surface of the display modules.
Cleaning the polycarbonate plastic display window in the cabinet door is
described in section
Caution:
Do not apply excessive force to the display surface or the adjoining areas since
this may cause the colour tone to vary. Don't touch, push or rub the exposed
polarizer covering the display surface of the LCD module with anything harder
than an HB pencil lead. The polarizer is soft and easily scratched. Handle it
carefully. Don't put or attach anything on the display area to avoid marks.
If the display surface is contaminated or dusty, gently wipe it with a soft dry cloth.
To avoid damaging the surface do not scrub hard. If still not completely clear,
moisten a cloth with isopropyl alcohol or ethyl alcohol.
Solvents other than those mentioned above may damage the polarizer. Especially,
do not use water, ketones such as acetone, or aromatic solvents.
Immediately wipe off any drops of adhesives like saliva and water from the display
surface. They might otherwise cause panel surface variations and color change.
7.6
Cabinet door display window
Clean the outside using a very soft cloth such as the type used for cleaning
glasses. Moisten with mild cleaning detergent solution. The rear side of the
window is more sensitive than the outside and should be cleaned with great care.
Important:
Do not forget to clean the glass in front of the warning/error indicator and the
ambient light sensor. If the light sensor is obstructed, this can increase the power
consumption of the terminal.
7.7
Cabinet
Cleaning
Clean the exterior of the metal cabinet surfaces using petroleum spirits (white
spirit) or a mild cleaning solution.
·
See Section
the display window in the cabinet door.
·
See Section
Issue 3
CWT Compact S4 Touch Installation & Maintenance Manual for CWT 1.0-0
Cabinet door display window, cleaning
Cabinet door display window, cleaning
Solar panel, cleaning
74
.
73
, regarding cleaning of
73
, regarding cleaning of the solar panel.
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