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WARNING
Section 7-3
8-3 Maintenance of the NT600S
Carry out maintenance work in order to ensure that the NT600S is always used in
its optimum condition.
Do not attempt to take the NT600S apart and do not touch any internal parts while
the power is being supplied. Doing either of these may result in electrical shock.
Spare PT It is advisable to have a spare NT600S available to minimize system downtime in
the event of anNT600S failure or if the screen display becomes difficult to readdue
to deterioration of the display unit.
Backlight When the backlight in the display is getting dim andthe screen cannot beread eas-
ily, replace the backlight. The backlight can be replaced at the rear of the NT600S
while it is mounted in an operation panel.
Models that use a backlight
NT600S-ST121-EV
NT600S-ST121B-EV
Replaceable Backlight Model
NT600S-CFL01
Guide to Backlight Replacement
Under normal conditions it can be assumed that the backlight will need to re-
placed after about 20,000 hours. However, the life of the backlight does vary in
accordance with the environment in which it is used and it should be replaced
when it is getting dim and the screen is getting hard to read.