JVC DLA-RS2 Lens shift problem - AVS Forum | Home Theater Discussions And Reviews
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post #1 of 29 Old 12-28-2010, 12:21 PM - Thread Starter
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Just received a RS2 and in setup the vertical lens shift just flops down when you try to raise it, then the wheel knob spins freely. It was shipped Fed Ex and I see in the manual it should be shipped with a buffer around the lens. There was no buffer installed or in the box.

Is there a fix for the loose shift?

Also if this isn't something I can repair what would JVC charge for this repair? Anyone send there's in for the same problem? I just bought this from a AVS member and would expect an easy return or at least get covered for the repair, sounds fair?

Oh I found the two pink foam buffer items laying in the bottom of the box. Should have been installed in the lens, one small thing caused a big problem. ugh

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post #2 of 29 Old 12-28-2010, 08:02 PM
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That is a shame. When I sold mine, I put those foams around the lens and the buyer gave me a positive rating. I even end up splitting part of the shipping and insurance since it was so heavy.

It would be fair to split the repair cost or lower the price, IMHO. Is it still under warranty?

BTW, the JVC shifts are better made than the Sony, for future reference.
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post #3 of 29 Old 12-28-2010, 08:10 PM - Thread Starter
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The seller is a MD, my wife says a doctor makes $500 an hour, I think he can handle it. No reply yet and don't know if it's still under 2 years old for warranty work. But would JVC accept it or call it user error.

I hear Jason here at AVS has fixed RS1 & 2 lens shifts so I'm hoping he see's this thread.

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post #4 of 29 Old 12-29-2010, 02:41 AM
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When shipping the RS1/2, you MUST use the packing pieces. If you don't, the problem you have is very likely to happen. This why it's mentioned in the Instruction Book and on a separate sheet that was normally shipped with the projector.

The fix is to replace the lens shift mech. This isn't a big job but it will have to be done by an engineer.
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post #5 of 29 Old 12-29-2010, 05:00 AM - Thread Starter
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That's bad news you buy something and have to immediately ship it in for repair.
Lets see what JVC's estimate will be. On the plus side the projector is top notch I watched Dark City and the Game plus the Berlin Helicopter scene in MI3 they all looked great. Even the oddball colors of MI3.

Just tuned in the basics and adding a custom 2.4gamma. I'll breakout colorfacts to see exactly where the projector is at but it can look good with just a minor tuning. Real good panel alignment on this one.
Nice black level.

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post #6 of 29 Old 12-29-2010, 10:11 AM
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GaryB_UK is right. The instructions were clear to ship w/ the foams between the lens.

I used JVC's double-box and cost me $88 from NJ to MA via UPS, a mere 300 miles away, so I ended up paying the difference of $28 but the buyer was happy.
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post #7 of 29 Old 12-29-2010, 04:32 PM - Thread Starter
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All is well I can fix the projector myself and got the part for free. Looking it over the side and veritcal shift are all one part. I'll have it fixed in a few days when the part arrives in the mean time it's still viewable very viewable.
Thanks for the input

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post #8 of 29 Old 12-30-2010, 07:36 AM
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How about documenting the install? There is a real lack of info on the shift mechanism on these projectors.

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post #9 of 29 Old 12-30-2010, 07:54 AM
 
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Quote:
Originally Posted by dragonbud0 View Post

That is a shame. When I sold mine, I put those foams around the lens and the buyer gave me a positive rating. I even end up splitting part of the shipping and insurance since it was so heavy.

It would be fair to split the repair cost or lower the price, IMHO. Is it still under warranty?

BTW, the JVC shifts are better made than the Sony, for future reference.

You sold both? Your Sony HW10 and your JVC RS2? What are you using now? I ended up picking up a new Viewsonic Pro8100.
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post #10 of 29 Old 12-30-2010, 08:57 AM - Thread Starter
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Quote:
Originally Posted by petew View Post
How about documenting the install? There is a real lack of info on the shift mechanism on these projectors.
Sure I can take pictures, what happens is there are two types of plastic gears, black hard plastic and white soft plastic. The white roller gear right next to the black gear that raises the lens up or down got all chewed up.

There are about a half dozen gears for the side to side and up and down shifts. The individual gears aren't accessible looks like the whole item gets replaced. I was surprised not to see any grease on the gears.

I would suggest to never force the rollers, once you feel resistance stop.

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post #11 of 29 Old 12-31-2010, 07:17 AM
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Tom,

Happy New Year! Good for you.

Mike / mjg100,

You have PM.
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post #12 of 29 Old 01-01-2011, 07:00 AM
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Tom,

Let me know what you think of the contrast between the JVC and your old Mitusbishi hc6500 when you get it running, also for sports viewing in terms of motion blur, if any.

Thanks.
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post #13 of 29 Old 01-05-2011, 05:07 PM - Thread Starter
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Here's the pictures of what you do to change a lens shift.

Here's the part, it's an upgrade they got smart and use hard a black plastic roller next to the black roller that moves the lens up, gears on the right.
http://www.videodementia.com/sales/jvcshift1.jpg

Remove the screws around the case and there's 2 on the bottom, take off the lens cover. Lift from the back up forward not allot of pressure, you'll notice the electric connections that need to be disconnected. Do the one on the front first plus it's taped down set it free from the tape. Then the whole case comes off.

http://www.videodementia.com/sales/jvcshift2.jpg
http://www.videodementia.com/sales/jvcshift3.jpg
http://www.videodementia.com/sales/jvcshift4.jpg

Three screws on the left to be removed
http://www.videodementia.com/sales/jvcshift5.jpg

Two screws on the right to be removed screw driver points to one.
http://www.videodementia.com/sales/jvcshift6.jpg

Here's the nasty old bugger out where it belongs, notice the white gear next to the hard black gear.
http://www.videodementia.com/sales/jvcshift7.jpg

Everything in reverse when putting it back together. A long magnetized screw driver is needed. Don't over tight the plastic case.

Hope you enjoyed the little show and tell.

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post #14 of 29 Old 01-06-2011, 06:18 AM
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Awesome documentation! Thanks.

Hmmm. Wonder how hard it would be to retrofit a stepper motor on the vertical shift driveshaft...

Link to purchase the part here.

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post #15 of 29 Old 01-06-2011, 12:51 PM - Thread Starter
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Thanks for linking the part number and price. You have to know sometime down the road an owner in trouble will search this site for lens shift fixing. Everything they need is right here.

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post #16 of 29 Old 01-06-2011, 01:04 PM
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Chances are the "black hard plastic" gears are either ABS or a PVC derivative. The "white soft plastic" gears are either nylon or delrin, both of which are kind of 'self lubricating', thus no grease.

I don't know that I would want to have any sort of lubricant on a projector mechanism. Just a way to attract dust and debris, get all mucked up and caused binding problems eventually.

Just some FYI.

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post #17 of 29 Old 01-06-2011, 01:09 PM - Thread Starter
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Quote:
Originally Posted by dragonbud0 View Post

Tom,

Let me know what you think of the contrast between the JVC and your old Mitusbishi hc6500 when you get it running, also for sports viewing in terms of motion blur, if any.

Thanks.

Great picture on the mits, but it's easy to spot the difference in contrast on the JVC. The mits has a great black level the JVC has a CRT type black level. The mits coloring can look better than the JVC. The JVC takes allot of tweaking to get the tones looking natural. Very high color saturation on the JVC. So much that after a while your other TV's look washed out.

All in all two very fine projectors. Right now I'm trying to sell the mits but if I have a hard time, I'll have no problem selling the JVC and keeping the mits.

I'm not a good reviewer for motion blur, mostly I've never ever see it, even with 24fps vs 60hz I don't see much of a difference.

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post #18 of 29 Old 01-06-2011, 03:58 PM
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Tom,

Thanks. We are in synch - the JVC's color does need tweaking. Also, I found the JVC a tad noiser.

BTW, I've no problem selling the JVC either, vs. Mitsubishi (HC3800) which did not hold its value (took longer too)
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post #19 of 29 Old 07-10-2012, 11:09 AM
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Hey Guitarman,

Is there any possibility you can re-upload the pictures for the lens shift fix. I have a JVC RS2 with this exact problem, but your links are dead.

Thanks so much for your time
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post #20 of 29 Old 07-10-2012, 11:46 AM
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Hey Guitarman,
Is there any possibility you can re-upload the pictures for the lens shift fix. I have a JVC RS2 with this exact problem, but your links are dead.
Thanks so much for your time

Did you get the part you need? Changing it is easy...takes about 20 minutes.
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post #21 of 29 Old 09-07-2012, 02:24 PM
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I finally saved some money up and got the gear for the lens shift problem (yay no more folded paper stacks!!!!). It comes in soon so any available advice for fixing it would be great. Thanks guys
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post #22 of 29 Old 02-23-2014, 06:43 PM
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Sorry for digging up an old thread but I seem to have run into this issue..

Does anyone happen to have these pictures around? I need to fix it on a RS1X but by the sounds of it, it should be similar...

Any help greatly appreciated..

Also does anyone know if the part is the exact same for the RS1X


Thank You!
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post #23 of 29 Old 11-08-2015, 09:45 AM
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Sorry to post to this older thread but I am also finding myself in this same situation. Is there still some video or pictures and or part numbers I can get?


Thank you
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post #24 of 29 Old 11-08-2015, 12:53 PM
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Had this problem a long time ago, I've helped a few members to fix it over the years as well.
Looks like some people ordered the entire assembly, but it might not be needed as I fixed it with the parts inside my RS2.

Depends on how handy you are. Basically what happens is the small cog that runs up and down on a toothed track wears out.
However, in my case, and I suspect in other cases as well, only few of the cogs' teeth wear out, leaving the rest of them intact.

When you activate the manual vertical shift it works until the missing teeth align with the toothed track, skip..., the lens drops.
Same mechanism is used in the horizontal plane, except it does not lift the actual lens assembly which weighs about a pound or so,
but rather shifts it left or right, no gravity, no wear.

What I did is used the horizontal cog as a donor for my vertical cog. Switched them around. Then I aligned the broken cog in the horizontal plane in such a way that the broken teeth were at the extreme of the range and did not affect my horizontal shift.

No parts, no ordering, no cost, just a bit of tweaking. Works like new.

Best way to go about it is to take the cover off and have a good look and see how the whole thing works.
After that it's pretty simple to understand what I explained above.

Hopefully this helps
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post #25 of 29 Old 11-08-2015, 01:46 PM
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Well on this unit it looks like someone must have removed it all. I took a look inside and there is nothing there ( on either side) to even figure out how it works. someone must have took it all out for some reason. What do you think my best option is.


Thanks
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post #26 of 29 Old 11-08-2015, 03:23 PM
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PM me and I'll see if I can help you out. Some pics of the inside would help as it's been a long time since I've looked inside an RS2.

Personally I would set up the pj in the position you want on the ceiling or shelf, adjust the lens and lock it with a piece of foam etc. (it should move freely if all the gears have been removed) and leave it there. Ebay has these units going for next to nothing these days, investing $$$ to fix is seems like a waste of money. My 2 cents...
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post #27 of 29 Old 11-09-2015, 08:45 PM
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Quote:
Originally Posted by mbonikow View Post
PM me and I'll see if I can help you out. Some pics of the inside would help as it's been a long time since I've looked inside an RS2.

Personally I would set up the pj in the position you want on the ceiling or shelf, adjust the lens and lock it with a piece of foam etc. (it should move freely if all the gears have been removed) and leave it there. Ebay has these units going for next to nothing these days, investing $$$ to fix is seems like a waste of money. My 2 cents...
Hey Mbonikow, Thanks for the response. I have tried to PM you not sure if they went threw due to me being new and low post count but hopefully we can figure this out. it would be great if I could manually set it and leave it without having to buy any parts. I noticed the person i bought this from has two more listed and both of them are missing the mechanisms also so it might be needed for a few others soon as well i imagine.

Thanks again
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post #28 of 29 Old 11-09-2015, 08:48 PM
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Quote:
Originally Posted by mbonikow View Post
PM me and I'll see if I can help you out. Some pics of the inside would help as it's been a long time since I've looked inside an RS2.

Personally I would set up the pj in the position you want on the ceiling or shelf, adjust the lens and lock it with a piece of foam etc. (it should move freely if all the gears have been removed) and leave it there. Ebay has these units going for next to nothing these days, investing $$$ to fix is seems like a waste of money. My 2 cents...
Hey Mbonikow, Thanks for the response. I have tried to PM you not sure if they went threw due to me being new and low post count but hopefully we can figure this out. it would be great if I could manually set it and leave it without having to buy any parts. I noticed the person i bought this from has two more listed and both of them are missing the mechanisms also so it might be needed for a few others soon as well i imagine.

Thanks again
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post #29 of 29 Old 12-01-2015, 10:56 AM
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After a few weeks I still need a little help. I bought part # LC33703-001C which should be the correct part for the lens shift but if you look at the two pictures the one JVC sent me shows it should have something to connect to but if you look at the picture of mine there is nothing there at all. The number for JVC is for easier trouble shooting than this type of stuff. Dave at JVC parts has been trying to help me the best he can but has no more ideas for me. Anybody have any ideas?
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