Proface APL3000B - Node Box PC - Manual (Page 71)

PS-3710A Series Hardware Manual
4-6
4.5 Replacing the Backlight
About the Backlight
PS-A units use a CFL, long-life type backlight. The actual life of the backlight however, will vary depending
on the PS-A’s operating conditions. It is recommended that it be replaced periodically. A PS-A backlight has a
life of 50,000 hours (approx. 5.7 years, at 25°C and 24 hour operation), when the backlight is lit continuously
(time required for brightness to fall to half its normal level).
• The backlights of the PS-A which is marked on Rev.5 cannot be replaced by the
user. When the backlight needs to be replaced, please contact your local PS-A
distributor.
• When the LED setting is specified with the RAS control in Control Panel and a backlight
burnout is detected, the status LED blinks in orange/red.
• If the backlight or the display unit is damaged, the screen display will go out. Even if the
screen goes out, however, there is a possibility that the touch panel is still operating cor-
rectly. Therefore, since any type of touch panel contact could have an unexpected or dan-
gerous effect or result, be sure not to touch the screen when this condition occurs.
• A backlight burnout is detected by monitoring the consumed current. Depending on the
condition of the backlight, a backlight burnout may not be detected or it may be detected
before the backlight burns out completely.
[Electric shock]
• Whenever changing the backlight, be sure the PS-A’s power cord has been
disconnected and that the unit is cooled down.
• When the PS-A’s power cord is connected and the PS-A is ON, high voltage runs
through the wires in the backlight area, do not touch them!
[Burn]
• When the PS-A’s power has just been turned OFF, the backlight area is still very hot!
Be sure to wear gloves to prevent being burned.
[Glass]
• The backlight is very fragile. Do not touch the glass tube directly or try to remove its
power cord, if the glass tube breaks you may be injured.