DIY color wheel replacement - AVS Forum | Home Theater Discussions And Reviews

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post #1 of 11 Old 12-31-2015, 12:33 PM - Thread Starter
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DIY color wheel replacement

I have the Mitsubishi HC4000 projector. it is now about 4 years old and has developed the color wheel whine. I am wondering if anyone here has ever done the replacement oneself on this or any PJ and how did it go. Easily done or a pain in the ass. I have a new wheel already in house. Just looking for some encouragement to pull it down from its wall mount and do it or take it to some possibly fumble fingered idiot at a repair shop.
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post #2 of 11 Old 12-31-2015, 01:24 PM
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You will need to get the info on how to enter the factory service menu. A change in color wheel will require the color wheel time to be changed. You may get lucky but probably not. When the time is off you will end up with postorization (sp) and banding. I have swapped out color wheels on my planar but the planars are like working on a 69 Chevy, everything is right in front of you and held together with screws..
If you can not stand watching it due to the noise, you have a replacement then go for it! Take lots of photos as you disassemble so you can get it back together... Also see if you can find or BUY a service manual for that particular model as it will have the timing adjustment process in it.
Work on a white or light colored surface if you can and have everything cleared way under and around your work surface so you can find that tiny little documficky or screw when you drop it!
Good luck and let us know how you make out.
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post #3 of 11 Old 12-31-2015, 01:47 PM - Thread Starter
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Airscapes,

Thanks for the quick reply. Your words on the color wheel timing adds another level of complexity I had not even thought of. i just assumed, once i got to the color wheel, unplug the old and in with the new, retrace my steps and seal it up. That does make me pause. There is in my search but one vid on youtube on a similar but a different model on changing the color wheel and was going to use it as a rough guide in my endeavor.
. perhaps, i will instead take a picture or two of taking it to the guy.
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post #4 of 11 Old 12-31-2015, 02:47 PM
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I would not let the timing issue stop you, it "may" not be a problem but you at least needed to know it could be so you do not freak when you are done and the image is not perfect. The process of setting the timing is to just change the adjustment while looking at a pattern that is most likely within the service menu. Also could use the AVE 709 disk and display a gray scale gradient or 109% full field. The adjustment is done by eye change numbers in a menu option until it looks good (has no vertical lines (banding)).

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post #5 of 11 Old 12-31-2015, 03:05 PM - Thread Starter
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Quote:
Originally Posted by airscapes View Post
I would not let the timing issue stop you, it "may" not be a problem but you at least needed to know it could be so you do not freak when you are done and the image is not perfect. The process of setting the timing is to just change the adjustment while looking at a pattern that is most likely within the service menu. Also could use the AVE 709 disk and display a gray scale gradient or 109% full field. The adjustment is done by eye change numbers in a menu option until it looks good (has no vertical lines (banding)).
In some older PJ's I have had, I knew how to get into the service menu. Not so with this one. Can I assume that the process of setting the timing if needed is done within that menu. I could call mitsubishi tech support again, though he would not give send me the service manual he did send me a couple of pages of it with pics showing the light engine assembly and parts list.
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post #6 of 11 Old 12-31-2015, 03:21 PM
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It's wroth a phone call, also do some extensive google searching.. The same process to access the service menu for an older Mitsubishi model may work with yours.

Doug
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post #7 of 11 Old 12-31-2015, 03:25 PM
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No idea if this site is legit or not but they claim to have it for $10 http://www.smpcshop.com/Mitsubishi-P...rvice-Manuals/

Doug
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post #8 of 11 Old 12-31-2015, 03:28 PM
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Here you go, right here at AVS access to the service menu: second post in below link
Official Mitsubishi hc4000 ONLY Thread

Doug
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post #9 of 11 Old 12-31-2015, 03:35 PM - Thread Starter
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Quote:
Originally Posted by airscapes View Post
No idea if this site is legit or not but they claim to have it for $10 http://www.smpcshop.com/Mitsubishi-P...rvice-Manuals/
Ha, yeah, I have seen all those and also not sure of if they are legit or not. I have spent some hours scouring the web for info on what I want to do.
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post #10 of 11 Old 12-31-2015, 04:53 PM
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Not sure you saw this as you were posting at the same time as I was
Here you go, right here at AVS access to the service menu: second post in below link
Official Mitsubishi hc4000 ONLY Thread

Doug
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post #11 of 11 Old 12-31-2015, 05:19 PM - Thread Starter
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Thats funny. I was just perusing the old thread here on my projector and saw access to the service menu by pressing up down and enter button at the same time. I had forgotten that I already new that as I had read that thread on the c4000 since it first started. Perhaps, I will go for it tomorrow.
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