Pro-face PL-7900 Series, Руководство пользователя

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7-4
PL-7900 Series User Manual
Maintenance and inspection
7-3 Replacing the PL Backlight
PL Type Backlight Type
PL-7900/ PL-7901 PL7900T-BL00-MS
WARNING
• Whenever changing the backlight, be sure the PL's power cord
has been disconnected and that the unit is cooled down.
• When the PL's power cord is connected and the PL is ON, high
voltage runs through the wires in the backlight area— do not touch
them!
• When the PL's power has just been turned OFF, the backlight area
is still very hot! Be sure to wear gloves to prevent being burned.
• Do not try to replace the backlight while the PL is installed in a
cabinet or panel. Remove the PL first, then begin the backlight
replacement procedures.
3-1 -1 Installing Options and Expansion Boards
Follow the steps given below to change the PL-7900T/PL-7901T's backlight.
Be sure to wear cotton gloves when performing this work to prevent burns.
1) Unplug the PL's power cord from the
main power supply.
Power Cord
2) Disconnect the PL power cord termi-
nals from the PL's power terminal
block.
Be sure to perform the back-
light changeover on a flat, level
surface. This will prevent dam-
age to the PL unit and the acci-
dental cutting of any of its
power cord terminals.
If the backlight or the display unit are 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
correctly. Therefore, since any type of touch panel contact
could have an unexpected or dangerous effect or result, be
sure not to touch the screen when this condition occurs.
!!!!!
Important
Note:
!!!!!
Important
The PL-7900T/PL-7901T’s backlight can be changed after it wears out. The
steps involved are outlined below.
Please use the following table to identify which backlight model number to
use when ordering your backlight.
Reference
Model:PL7900T