Owner`s manual

Maintenance and Troubleshooting

56 VideoWall™/CineWall™ Installer/Integrator Manual

PRE

IMINAR

Isolating Faulty Parts If you suspect that a part may be faulty, replace it with a known-good one if available. This

is a very effective way to find a problem. If the problem goes away, the original part was at

fault.

If the problem persists, you haven’t found the problem yet, but you have learned

something: the original part was not the problem. Re-install it and try something else.

If the Lamp Won’t Light: Check to make sure the lamp is actually not lit. If the lamp is

lit, you can usually see light come through spaces between parts if you look carefully.

Many things can make the screen black, even though the lamp is lit:

• The Curtain may be on. If the curtain is black and it is on, the screen will be black.

• There is no source picture. With no valid picture coming in, the display will be black.

• There is something blocking the light to the screen. Is the lens cap on?

• There are parts missing in the optical path. If someone was working on the display,

maybe he or she forgot to put something back in.

If the lamp is not lit:

• The VideoWall/CineWall may not be receiving AC power. Check the main AC switch on

the display. It should be lit.

• The lamp ballast may not be receiving power. Some displays have a green LED near

the main AC switch that lights when the 380-volt part of the power supply is working. It

should be lit. Other displays may have an LED on the electronics module to show when

this high voltage power is available.

• If the lamp is OK, try swapping the ballast in the same way. The lamp ballast provides

power to the lamp. It is an electronic part, and all electronic parts are eventually subject

to failure.

• A fan may have failed. Most fans are sensed. That means the electronics module

knows whether they are running or not. If they don’t run when they should, the

electronics module turns off the lamp and prevents it from striking (turning on) again.

Swapping other parts: You can swap electronics modules or fans in the same way to

see if one is bad.

Why not use a new part out of the box? It may seem like a good idea to take a new

part out of the box and substitute it for a suspected part in the display. However, there is

a very tiny chance that the part in the box doesn’t work. If you test a part by putting in a

known good part, you get better information.

➤

Always turn off the AC power and remove the power cord before

working inside the display and before removing a lamp.

When you swap fans, always exchange fans of the same size.

WARNING

Note