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How to Replace the Backlight Unit
7
7 How to Replace the Backlight Unit
When the screen brightness becomes dim and cannot be adjusted to the optimum setting, the life of the
backlight unit may be expiring.
For the UGx20 series PODs, it is possible for users to replace the back light, except UG221. Obtain a new
backlight unit suitable for the POD type, and replace the backlight unit with the new one according to the
procedure described below.
*
Figures for the life of backlight shows the time till the surface luminance becomes 50% the initial value at
the ambient temperature of 25
°
C.
Warning
•
Turn off the power before replacement. You may get an electric shock, or the body or backlight unit may
malfunction or become faulty.
•
The liquid of the LCD (liquid crystal) is toxic. If the LCD panel is damaged and the liquid flows out
of the panel, make certain that no liquid enters your mouth. If the liquid contacts your skin or clothes,
wash it off using soap or detergent.
•
Do not remove any parts other than those indicated in the manual. Otherwise, the body or unit may
become faulty.
Caution
•
Replace the unit in an environment free from dust, foreign matter, or static electricity. Otherwise, the
body or unit may malfunction or become faulty.
•
Lightly wipe dust or liquids off the surface of the body or unit using a soft cloth.
•
Do not push the front of the display unit using a sharp pointed device such as tweezers and engineering
tools.
•
Do not touch any parts other than those necessary (especially for the printed circuit boards). Otherwise,
the body or unit may malfunction or become faulty.
Body type
Backlight
Replacement
Life of backlight
unit type
procedure
UG520H-V (TFT color)
UG520P-BFA
3-20
50,000
UG420H-V (TFT color, 800 600 dots)
UG420P-BVA
3-34
50,000
UG420H-T (TFT color, 640 480 dots)
UG420P-BFA
3-34
50,000
UG420H-S (STN color)
UG420P-BC
3-40
25,000
UG320H-S (STN color)
UG320P-BC
3-45
40,000
UG320HD-S (STN color)
UG220H-S (STN color)
UG220P-BCA
3-52
40,000
UG220H-L (Monochrome)
UG220P-BLA
3-52
40,000
UG221H
(All Types)
Can not be replace
50,000
Summary of Contents for UG220H Series
Page 270: ...Appendix Ladder Transfer Function...
