Barco MD-4221 - Manual (Page 43)

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Normal wear and tear, use under circumstances exceeding specifications, such as use in dusty
environment or under excessive temperature conditions, abuse, unauthorised repair or alternation,
lack of proper configuration or maintenance, damaged or modified or removed serial number,
cosmetic refurbishment.
2.5
Repair or replacement of consumables
1 or specific parts that by definition are subject to wear and tear,
including but not limited to:
a. CRT’s, LCD panels
b. Backlights in diagnostic LCD displays, when the backlight run time
2 is beyond the Guaranteed
Backlight Lifetime 3 of that model, when used at the Factory Calibrated Luminance 4
Eg1.
• A display is used at 8 hours/day; ie. +/-2.920hours/year
• The display system is covered with a warranty period of 5 year
• The Guaranteed Backlight Lifetime of that model is 17.000hours.
• The Factory Calibrated Luminance cannot be achieved anymore after 4 year, thus
corresponding to +/-11.680hours
• Result: the backlight replacement is performed under warranty
Eg2.
• A display is used at 24 hours/day; ie. 8.760hours/year
• The display system is covered with a warranty program of 5 year
• The Guaranteed Backlight Lifetime of that model is 17.000hours.
• The Factory Calibrated Luminance cannot be achieved anymore after 2.5years, thus
corresponding to +/-21.900hours
• Result: the backlight replacement does not make part of the warranty coverage.
(1): ‘Consumable’ is a part that can be replaced by the user
(2): ‘Backlight run time’ is the total time that an image (including use of a screen saver) has
been applied to the screen; this value can be consulted via the OSD buttons (On Screen
Display).
(3): ‘Guaranteed Backlight Lifetime’ is the number of backlight hours during which a
predefined luminance value, ie. the Factory Calibrated Luminance, will be provided by a
specific diagnostic display model. This figure is printed on the Warranty certificate of each
display or can be requested at your local Barco office.
(4): ‘Factory Calibrated Luminance’: is the typical luminance value that a specific diagnostic
display model is calibrated at during the production process. This figure is printed on the
Warranty certificate of each display or can be requested at your local Barco office.
c. Lamps, optical components in projectors
d. Replacement because of:
i. image retention as a result of:
- not correctly using screen saver and/or Display Power Management System (DPMS) as
explained in the user manual
- prolonged operation of the display with a static image on the same screen area
ii . a number of missing pixels that is lower than the total allowable number as mentioned
in the product specifications.
iii. difference in color temperature that is lower than the total allowable difference as
mentioned in the product specifications
iv. difference in color temperature as a result of not using all displays of a multi-head
configuration at the same rate.