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Maintenance of the NT31/NT31C Section 7-3
Also, discharge the static electricity from your body before starting the
work.
• Do not carry the backlight unit by holding only its cable, or pull on the
cable. Do not subject the backlight to excessive force or shock.
• Do not disassemble the product to repair or modify it.
Replacing the Backlight Use the following procedure to replace the backlight.
Replace the backlight by following the procedure given below:
Procedure
1,2,3... 1. Turn the power supply to the NT31-ST121@-EV2/NT31C-ST141@-EV2
OFF.
2. Disconnect the terminal block wiring, the communications cable, and the
printer cable. If a Memory Unit or Interface Unit is mounted, remove that
Unit also.
3. Open the cover of the CFL unit housing by following the procedure de-
scribed below.
a. Unscrew the screw in the center of the cover.
The screw is designed so that it cannot be removed, but if it does come
out for some reason and falls inside the PT, it must be extricated with-
out fail.
b. Open the cover while pressing the tabs at its left and right inward.
c. When the cover has opened far enough, remove it.
4. Remove the CFL unit by following the procedure described below.
a. Disengage the connector.
WARNING
Switch OFF the NT31-ST121j-EV2/NT31C-ST141j-EV2
power before replacing the backlight. Otherwise you could
sustain an electric shock.
CAUTION
Do not touch the backlight immediately after switching
OFF the power supply.
Otherwise burn injuries may result due to the high
temperatures.
b
b
b
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