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9 CLEANING AND MAINTENANCE
The Display does not require any internal adjustments and it does
not contain any user-servicable parts.
For any service requirements seek qualified technical assistance
from your nearest Dealer.
To clean the exterior of the unit use a soft cloth moistened slightly
with water and a small amount of neutral detergent if necessary.
Avoid direct cleaning of the rear panel’s screen-printed captions.
10 TROUBLESHOOTING GUIDE
No power (LEDs always OFF)
· Check that the unit’s power switch is set to “I”.
· Check that the mains power cord is correctly plugged in to the
mains socket outlet.
· Check the condition of the fuse located on the power socket on
the rear of the screen.
· Replace the fuse located on the screen power socket with an
equivalent and identically rated fuse (T5A H).
· If the fuse blows repeatedly, seek technical assistance from your
nearest Dealer.
No picture
· Make sure the selected input is connected to a video or graphic
signal and that the source is functioning correctly.
· Make sure the video or graphic signals supplied by the source
are compatible with the technical specifications of the HTL40
system and, in particular, with the selected input.
· Check the condition of the cables used to connect the HTL40
system to the various sources.
· Make sure the cooling air vents on the units are not blocked and
that the ambient temperature is below 35°C.
Picture is disturbed, unstable or noisy
· Make sure the video or graphic signals supplied by the source
are compatible with the system’s technical specifications and,
in particular, with those of the selected input.
· Check the condition of the cables used to connect the HTL40
panel to the various sources.
· If the problem occurs on a terrestrial broadcast source signal,
check that the receiver has been correctly tuned in and that the
aerial system is in good working order.
· If the problem occurs in a video signal from a video-recorder,
ensure that the videotape is an original “first generation” copy
and that VCR is active in the PICTURE menu.
· Adjust the Sharpness parameter in the PICTURE menu to opti-
mise the displayed image.
Image incomplete along the edges (vertical or horizontal)
· Make sure the video or graphic signals supplied by the source
are compatible with the system’s technical specifications and,
in particular, with those of the selected input.
· Recall the automatic image adjustment function by pressing
key “A” on the remote control or the AUTO key on the screen
keypad.
· Adjust the horizontal or vertical position of the displayed image
using the IMAGE / POSITION menu.
· Adjust the width and height of the image, selecting Aspect in the
IMAGE / ASPECT menu.
· Adjust the overscan value applied to the image on the IMAGE /
OVERSCAN menu.
Image too dark, too pale or unnaturally coloured
· Make sure the video or graphic signals supplied by the source
are compatible with the system’s technical specifications and,
in particular, with those of the selected input.
· Adjust the BACKLIGHTING parameters, Contrast, Brightness,
Colour and Tint in the PICTURE menu.
·If necessary, adjust colour temperature and Gamma Correction
( IMAGE menu).