Knoll HD178, HD292, HD290 user manual Replacing the projection lamp, Maintenance Cleaning the lens

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Maintenance

Cleaning the lens

1Apply a non-abrasive camera lens cleaner to a soft, dry cloth.

Avoid using an excessive amount of cleaner, and don’t apply the cleaner directly to the lens. Abrasive cleaners, solvents or other harsh chemicals might scratch the lens.

2 Lightly wipe the cleaning cloth over the lens in a circular motion.

Lamp hours used

Replacing the projection lamp

The lamp hours timer in the Service Info

menu counts the number of hours the lamp has been in use. Twenty hours before the lamp life expires, a message appears on the screen

at startup indicating that you should change the lamp. The LED on top of the projector also blinks red twice to indicate that the lamp should be changed. Use only a replacement lamp with the same type and rating as the original lamp.

1 Turn off the projector and unplug the power cord. If ceiling mounted, disconnect all cables and detach the projector from the ceiling mount.

2Wait 60 minutes to allow the projector to cool thoroughly.

3Turn the projector upside down on a soft cloth so that the lamp door is facing you. Remove the base or ceiling

mount plate, if attached, by removing the three screws.

wait 60 minutes

turn off and unplug projector

4

Push the 2 tabs on the lamp door toward the

lamp door

 

front of the projector and lift the lamp door off.

 

5

Loosen the three captive screws that attach

 

 

the lamp housing to the projector.

 

6

Detach the lamp connector from the projector

 

 

by depressing the locking tab on the connector

 

 

and lightly pulling it free.

 

lamp housing

WARNING:

To avoid burns, allow the projector to cool for

at least 60 minutes before you replace the lamp. Be extremely careful when removing the lamp housing. In the unlikely event that the bulb ruptures, small glass fragments may be generated.

captive screws

lamp connector

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Contents HD108 HD178 HD290 HD292 Declaration of Conformity Safety CertificationsFCC Warning TrademarksTable of Contents ’ / 1 m Product specifications Accessories IntroductionHdmi M1/DA/DVI Rear Connector Panel VideoVolt DC output Setting up the Projector Projector PositioningChoosing the aspect ratio HD108 Projection Throw Distance 169 Video ScreenVideo Connectors Component RCA Connecting a video deviceDigital connections Video connectionComputer connections Displaying an imageTroubleshooting your setup Shutting down the projector Power SaveSleep Timer Turning off the projectorPage Page Using the keypad buttons Using the remote controlTroubleshooting the remote Still need assistance?Optimizing video images Using the menusCustomizing the projector Picture menu Horizontal/Vertical Position adjusts the position of a Advanced menuSettings menu Page Page Replacing the projection lamp Maintenance Cleaning the lensWait 60 minutes to allow the projector to cool thoroughly Appendix LED BehaviorProjector dimensions for ceiling mount installations Remote control discrete codesRS-232 terminal specifications for HD178 and HD290 Communication configurationFunction Command Response AAASupported commands Function Command Range Default VSU TSAVPS = SecamPage Limited Warranty