Grundig GLCD1906HDV - Manual (Page 39)

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(2) When you want to cut off the electricity supply to the unit, please
press the STANDBY button on the unit, then take out the plug from
the wall outlet.
(3) Don’t press any buttons if you are not using the unit. Set the
STANDBY button to “OFF”, and take out the batteries from the
remote control if the unit is not being used for a long period of time.
(4) Be cautious of the safe mark.
(5) Repairs are to be referred to qualified service personnel. DO NOT
attempt to take apart by yourself.
(6) Due to a sudden change in temperature or humidity, or when warm
air comes into contact with any cold parts in the unit, condensation
may form. When condensation forms inside, the unit may not
function well. Once condensation disappears, the unit will return to
normal functions. Placing the unit in a warm room will help to dry up
condensation. This should take 1 to 2 hours, depending on
environmental conditions. As condensation may also appear on the
disc, it should be wiped from the center towards the outer side
using a dry cloth.
(7) It is dangerous to use warped or broken discs since lasers rotate at
high speed. Never use discs repaired with plastic tape or glue, as it
will lead to damage. After playing, if you hear a strange noise or the
unit flatters, e.g. the disc does not turn smoothly, please stop
playing immediately.
(8) Please remove the disc after use and put into a case, store them in
a vertical position. Tilting or piling may lead to warping.
Please keep the discs away from direct sunlight, high temperature
and humidity.
Do not stick labels onto discs.
Do not scratch the surface of discs.
IX. Maintenance
1). Cleaning the cabinet
Use a soft cloth slightly moist with a mild detergent solution. Do not