Question about InFocus IN72 Multimedia Projector

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Need to replace the circuit board on an IN72 Big Picture

Any thoughts on where to purchase this replacment part. I over screwed the mounting plate and accidentally cracked the circuit board underneath. They want to charge me $379 plus shipping. The projector cost only $599. Any thoughts on how I might go about replacing this part and buying one online? Thanks.

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Re: Need to replace the circuit board on an IN72 Big Picture - InFocus IN72 Multimedia Projector Multimedia Projectors

Try ebay

Posted on Jan 27, 2008

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The projector would not turn on and had a flashing red light for the lamp. Knowing it was an older projector when we rented the building I purchased a new bulb for this projector. When I put the new bulb...

PROBLEM :-The power supply of the projector is faulty there is a transistor witch is switch 15 volts for the lamp drive board.

SOLUTION: Remove the upper cover with 6 screws back side of the projector.
remove main board and lamp cover with 7 screws.(show in the picture)
remove upper cover of the power supply and lamp drive unit with 3 screws.
remove power supply unit with 4 screws and 3 connectors and put face down on the table.
now you find the transistor no Q107 and replace with the transistor no 2SB710 is and surface mounted compunent(show in the picture)
fix it all as you open.
power ON the projector and enjoy

(doing very carefully This is a technical job)


Feb 05, 2011 | Panasonic PT-LB10SVU Multimedia Projector

1 Answer

Picture is showing in BLACK AND WHITE now. Can I buy just the COLOR WHEEL iot repair unit??

yes. part number 525-0146-00. you can get it through any infocus authorized service center. some won't sell parts to you. try av solutions in rochester, ny. i know they will.

to replace the colorwheel:
remove the 4 brass and 4 silver screws from the bottom and the 2 silver screws from the back. through the top vent on the back panel and using a flat head screwdriver, unclip the 3 clips holding the back panel on. once removed, unplug the 2 wire harnesses. remove the top and front panel. now unplug the large wire harness and remove all the brass screws on the 2 power supply boards (also the screw for the ground wire). there is a black clip in the middle of the larger power board. remove the boards. now remove the brass screws holding the metal plate on. once removed, unplug the flat ribbon cable (for the colorwheel). now facing the front end, remove the lamp and the 4 screws holding the lamp housing (with fans) on to the bottom case. remove the tiny black screw on the small circuit board and remove the board. now you can get to the colorwheel. there are 2 small black screws holding the bracket. pull the ribbon cable through from under the fan. replace with new colorwheel and reverse the instructions. the only difference, remove the front panel from the top by undoing the clips. good luck!

Oct 05, 2009 | InFocus ScreenPlay 4805 Multimedia...

1 Answer

Can I reset my lamp timer without replacing the lamp?

That should be fine to do. Even if the projector did alter the current based on lamp life, the worst that could happen in the lamp would burn out completely. A good projector should have a safety circuit with a fuse to prevent damage to any internal components. You should be fine.

Mar 25, 2009 | InFocus IN72 Multimedia Projector

2 Answers

IN72 Projector problem

My understanding when we purchased our IN72 2 years ago is that there wasn't any additional benefit for Cable box using HDMI since the IN72 does not transmit audio so using component cables for cable was optimized enough. We have our DVD player connected via the HDMI only. Possibly the transmission from cable box through an HDMI is not compatible audio is confusing it? hard to say. Cable HD channels look awesome thru the compenent cables, the max for IN72 is 480i anyway.

We've got 35 ft cables for all 3 hdmi, compenent, and that vcr one too and it's worked great.

Oct 22, 2008 | InFocus IN72 Multimedia Projector

1 Answer


Hi TheMull

I also checked and the fuse looked fine , but I thought to myself why not take a chance and replace the fuse as this is a very cheap part , and it worked.

May 29, 2008 | InFocus IN72 Multimedia Projector

1 Answer

In72 power board

Hi TheMull

I just replaced the fuse on the Powersupply Board and Fixya !

May 27, 2008 | InFocus IN72 Multimedia Projector

1 Answer


Try using a different cable.

If the response is the same on a different cable , then the Mainboard might be at fault - this machine should still be under warranty and the warranty will cover repairs.

Apr 05, 2008 | InFocus IN72 Multimedia Projector

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