Promax HD Ranger Lite, Руководство пользователя

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July 2015
11-117
2
11 MAINTENANCE
11.1 Considerations about the Screen
This paragraph offers key considerations regarding the use of the colour screen,
taken from the specifications of the manufacturer.
In the TFT display, the user July find pixels that do not light up or pixels that are
permanently lit. This should not be regarded as a defect in the TFT. In
accordance with the manufacturer quality standard, 9 pixels with these
characteristics are considered admissible.
Pixels which are not detected when the distance from the surface of the TFT
screen to the human eye is greater than 35 cm, with a viewing angle of 90°
between the eye and the screen should not be considered manufacturing defects
either.
It is advisable a viewing angle of 15° in the 6.00 o’clock direction in order to
obtain the optimum visualization of the screen.
11.2 Cleaning Recommendations
The equipment consists of a plastic case and a TFT screen. Each element has its
specific cleaning treatment.
Cleaning the TFT screen
The TFT screen surface is VERY DELICATE. It has to be cleaned with a soft
fabric cloth (cotton or silk), always making the same move from left to right
and from top to bottom, without putting pressure on the screen.
The TFT screen has to be dry-cleaned or with a product specifically designed
for TFT screens, by slightly dampening the cloth. NEVER use tap or mineral
water, alcohol or conventional cleaning products, because they contain
components that can damage the screen.
Turn off the equipment to locate dirt on the screen. After cleaning, wait a few
seconds before turning on.