Oce Arizona 550 GT, User Manual

Page: 243 / 263

How to Change a UV Lamp Bulb
Introduction
Your Océ Arizona printer uses two UV lamps, one on each side of the carriage, to cure
the UV ink during printing. The bulbs in these UV lamps have a limited lifetime and
must be replaced by the operator if they fail or when they can no longer cure the ink at
maximum available power.
When to do
Although the functional life of the UV lamps can be as high as 500 hours, there are factors
that can reduce the expected lifetime. Operational practices, such as turning the lamps
off and on frequently, using them at high intensity all of the time, or touching the bulbs
with your fingers, can shorten their life. Océ recommends that both UV Lamp bulbs be
replaced at the same time to ensure that the curing effect is balanced when printing in
both directions. In the case of a premature failure or accidental breakage of one lamp,
the operator can decide to replace only one lamp but should confirm image consistency
after the replacement. Uneven curing can cause gloss banding in the printed image. We
also recommend that you change the lamp filters when the bulb is changed.
Note:
The Flatbed Settings icon on the printer interface allows the operator to control the
power output of each UV lamp independently. To extend lamp life, use the lowest setting
that provides adequate curing for a particular media. However, avoid handling media
with insufficient curing as partially cured UV ink on your skin can cause irritation and
sensitization.
Before you begin
1.
Turn off the ink temperature.
2.
Turn off UV lamps.
3.
When the ink temperature is below 40°C (104°F) and the UV Lamps are cool, click on
the Shutdown button in the Tools and Utilities module.
4. Turn off the printer power (see How to Power the Printer On and Off for proper proce-
dure).
5.
Apply a lockout to the AC power switch.
Caution:
The UV lamps and the carriage guard may be hot if the printer has been active. Avoid
touching the guard and the lamp assembly until it is cool.
Chapter 11 - Printer Maintenance 243
How to Change a UV Lamp Bulb