Question about InFocus Office Equipment & Supplies
Your colorwheel is going bad. needs replacment. find an infocus service center and purchase part # 525-0144-00. shouldn't be more than $50, but replacement is pretty involed. you need to remove the top case, front and back covers, power boards, plate, lamp house assembly, and fans just to get to where the colorwheel is plugged in to the main board. removal of the actual colorwheel is only 3 screws.
Posted on Jul 30, 2009
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Posted on Jan 02, 2017
Tips for a great answer:
The automatic keystone adjustment may not be carried out correctly
because of the ambient temperature and the installation
conditions of the projector and the screen. In such cases, correct
the keystone manually.
• When the projector is projecting images where acceleration is
present, such as in a vehicle and aircraft, the automatic keystone
adjustment may not function correctly. In such a case, set AUTO
KEYSTONE in the INSTALLATION menu to OFF and correct the
• You can correct the vertical keystones. However, their adjustment
ranges are limited in such correction.
When the keystone adjustment is carried out, the adjustment
value is indicated. Note that this value doesn't mean a projection
• The allowable range of the adjustment value in the keystone
adjustment varies depending on the installation conditions.
• When the keystone adjustment takes effect, the resolution
decreases. In addition, stripes may appear or straight lines may
bend in images with complicated patterns. They are not due to
• Noise may appear on the screen during the keystone adjustment
because of the type of the video signal being projected and the
setting values of the keystone adjustment. In such cases, set the
keystone adjustment values in the range where the image is displayed
• When the keystone adjustment is carried out, the image may not
be displayed correctly because of the type of input signal.
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This sounds like your convergence correction amplifiers have malfunctioned. These Integrated Circuits often burn out after a few years (STK392-110) they can be replaced with a higher version (STK392-150) However it is important to have the biasing circuitry checked to make sure nothing has burnt out as a result of the ICs malfunctioning. If you have a background in electronics you can repair this problem with very little effort, however if you do not have a background in electronics, I would suggest that you have your TV serviced by a qualified TV technician.
I hope this helps,
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