Knoll Systems Ht211 Projector User Manual

							Troubleshooting: Common Problems & Solutions 
 
Problem Check These Items 
Does not turn on Check that the cord is plugged in with power at that 
outlet 
 
Slide lamp cover off lens 
 
Check the status light to see if the projector has 
overheated or the lamp usage exceeds 1100 hours. 
No picture Use remote buttons to select correct source (Video, 
S-Video, or RGB).  
 
Ensure your cables are connected properly.   
 
Adjust the brightness and contrast. 
 
Slide lamp cover off lens 
 
Is the STATUS indicator blinking? 
Image isn’t square to the screen Adjust keystone or projector angle to improve its 
angle to the screen. 
Picture is blurred Adjust the focus.  
 
Reposition the projector to improve its angle to the 
screen.  
 
Ensure that the distance between the projector and 
screen is within the adjustment range of the lens 
 
Is lens dirty or have condensation on it? 
Remote control does not work Install new batteries. Low batteries may be 
insufficient to generate IR commands. 
 
Make sure there are no obstacles between you and 
the projector. 
 
Stand within 13 feet (4m) of the projector.  
The STATUS indicator is lit or blinking See the Status Light message chart on the next page. 
Cross color in RGB mode If “Auto Picture” is off, turn it on.  If “Auto Picture” 
is on, turn it off.Balance the image with the Picture 
Adjustment icon and Fine Picture Adjustment icon 
 
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							When the STATUS indicator on the projector keypad lights or blinks 
Status Light Message 
 
Condition Status 
OFF Normal 
On Continually The projector lamp has exceeded 1000 hours of 
operation and should be replaced. 
Blinking Very Rapidly (On and off in a 
cycle of 1 sec.) 
The lamp housing is not correctly installed.  Install it 
correctly. 
Blinking Rapidly 
(On and off in a cycle of 4 sec.) 
The temperature protector has been triggered.  If the 
room temperature is high, move the projector to a 
cool location. If the temperature within the projector 
is high, check the cooling fan ventilation hole and the 
ventilation hole on the bottom of the projector.  If any 
holes are blocked, remove whatever is blocking them. 
 
The temperature protector has been triggered.  If you 
switch the main Power switch Off, then immediately 
switch it On again; sometimes the power does not 
come on.  If this happens, wait one minute, and then 
switch the power On again. 
 
The lamp lighting voltage error detection protector 
has been triggered.  Wait at least one minute before 
switching it on again.  If this does not solve the 
problem, please contact your dealer. 
Blinking Slowly (On and off in a cycle of 
8 sec.) 
The cooling fan has stopped.  Contact your Knoll 
dealer for service. 
Blinking Very Slowly (On and off in a 
cycle of 12 sec.) 
The lamp is not turned on. 
 
The projector was turned off and back on too quickly.  
Turn off the projector, wait one minute, then turn the 
projector back on.  Or the lamp is burnt out. 
 
Replacing the lamp housing 
After the lamp has been operating for 1000 hours or longer, the STATUS indicator on the control 
panel will light and “LAMP USAGE” icon, which shows hours of total lamp use, will be 
displayed on the screen.  When this happen, turn off the unit and replace the lamp housing with 
new one.  The unit will not be go on after 1100 hours.  (It will go off\
 if it is in use.) 
 
                                          
   ***CAUTION*** 
• DO NOT TOUCH THE LAMP immediately after it has been used.  It will be 
extremely hot.  Allow at least one hour for the lamp to cool before handling. 
• DO NOT LOOSEN ANY SCREWS except for those mentioned in the instructions \
below.  There is danger of electric shock. 
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Lamp Replacement Procedure 
1. Switch off the main power and unplug the power 
cord.   
2. Wait at least one hour for the lamp to cool. 
3. Turn the unit upside down carefully. 
4. Loosen the lamp cover securing screw. 
5. Slide the lamp cover in the direction of the arrow 
and remove it. 
 
CAUTION: Do not use a lamp housing other 
than the Knoll replacement lamp housing. Order 
this from your Knoll dealer using your 
projector’s model number (see “Note” below). 
6. Loosen the three lamp housing securing screws.  
(This projector has a safety switch.) 
7. Hold the handle then pull the lamp housing 
upward to remove it. 
8. Install the new lamp housing. 
9. Secure the lamp housing with the three screws. 
10. Replace and secure the lamp cover with the 
securing screw. 
11. Return the unit to the normal position, connect 
the  
       power cord, and turn on the unit. 
12. Reset the lamp time. See “Resetting the lamp use 
hours to zero”. 
 
Note: 
When the lamp usage time reaches 1100 hours, 
it becomes impossible to switch on the power 
and menus are not displayed.  In this case, press 
the remote control POWER OFF button for at 
least 10 seconds in the standby mode.  It is 
possible to confirm whether it has been reset or 
not by checking whether the STATUS indicator 
is extinguished. 
Obtain a replacement lamp from your dealer 
where the projector was purchased.  When 
ordering a replacement lamp, specify the 
correct replacement lamp – Product code 28-
631. 
Knoll Systems  
145 Tyee Drive Point Roberts, WA USA 98281 
11791 Machrina Way, Richmond BC Canada  
V7A 4V3 
 
© Copyright 1999-2000 All Rights Reserved 
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