Omron NT631C manual Replacing the Backlight, Procedure

Maintenance of the NT631/NT631C Section 7-3

Notes on Replacing the Backlight

Replacing the Backlight

The life of the backlight varies, particularly in accordance with the temperature in the environment in which it is used. It should be replaced when it becomes dim and the screen becomes hard to read.

The life expectancy of the backlight for the NT631C-ST152@-EV2/ST153@- EV3 at high brightness is 50,000 hours. The backlight cannot be replaced by the user, however. Contact your OMRON service center when the backlight needs to be replaced.

Pay attention to the following points when replacing the backlight.

•Carry out the replacement work in a location where there is no danger that dust or foreign bodies will enter the Unit, and where no water will drip onto it.

Do not touch the printed circuit boards of the NT631C-ST141@-EV2/ ST151@-EV2 with your bare hands.

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.

Use the following procedure to replace the backlight.

WARNING

Switch OFF the NT631C-ST141@-EV2/ST151@-EV2 power before replacing the backlight. Otherwise you could sustain an electric shock.

Replace the backlight by following the procedure given below:

NT631C-CFL01 (for NT631C-ST151@-EV2)

Procedure

1,2,3... 1. Turn the power supply to the PT OFF.

Be sure to do so to avoid an electric shock.

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.Loosen four screws at corners on the rear face of the NT631C, and remove the rear case.

Be careful not to lose these screws.

From this step on, exert added care not to touch any electronic parts or printed circuit boards inside the Unit. Otherwise the PT may sustain static damage.

4.Disengage two backlight connectors at the top and the bottom, and pull out the touch panel cable.

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