CurtPalme.com Home Theater Forum

macgyver655 · Joined: 22 Aug 2007 Posts: 8508

cmjohnson · Joined: 03 Apr 2006 Posts: 5180 Location: Buried under G90s

It looks to me like the client took the picture by hand without a tripod and introduced some vertical movement into the image as a result.

I do not take screen shots without a tripod.

CJ

**Curt Palme** · Posted: Thu Jun 17, 2010 12:54 pm Post subject:

Jumping in late here... I agree with the boards that Mac suggested in his first post, but add the HDM in there as well.

I had two strange shaking issues here in the last 2 months, but all at 60Hz. One 8500 would shake like crazy at 1080i, every other resolution was OK. I reseated the chips on the CLM, and it went away.

The other developed a similar H shaking after 2 hours of being on. that was the HDM. Haven't repaired that one yet, but that's what it was.

mp20748 · Posted: Thu Jun 17, 2010 12:59 pm Post subject:

HDM or the deflection processor board on the CLM

I would start first with re-seating the daughter board on the HDM and then the DPB on the CLM. From there replace the HDM.

draganm · Joined: 08 Mar 2006 Posts: 8990 Location: Colorado

I've seen a half-dozen flaky CLM's last few months people sent in along with the HD mod's and the biggest culprit IMHO appears to be the Yellow solid Tantalum caps. Replacing them has cleared up problems for people in every case. There's 10 on the DPB and 8 on the main CLM board (+2 AL EL's).
Wierd problems were random shut-downs, shaking rasters, Loss of synch after a period of time (warm-up), anamoly's in the raster including black lines like this

mp20748 · Posted: Thu Jun 17, 2010 3:23 pm Post subject:

Craig called me last night and left me a message on this problem. I just got off the phone with him a few minutes ago.

The plan is to have the customer call me later, I'd want to verify that the CLM and HDM have the correct chip versions and at the same time walk the customer through a few procedures to better isolate the problem.

Horizontal jitter is rare on a Marquee, and in most cases easy to make go away. In the event it's not so easily solved, both HDM and CLM would need attention because of the handshaking involved in their operation.

Craig has already suggested to the customer to send the suspected module to Curt for repair. Hopefully we can be of help to better isolate the problem later.

tse · Joined: 03 May 2006 Posts: 1014 Location: Sweatbucket, Fl.

Has a turn off and turn back on cycle been tried when the distortion happens? There is a small "auto calibration" of the horizontal deflection processing that happens with turn on. If it is warming up enough for the deflection processing to drift off enough to cause the distortion then maybe having the auto calibration cycle happen while warmed up might fix it. Easy enough test.

Scott

cmjohnson · Joined: 03 Apr 2006 Posts: 5180 Location: Buried under G90s

Draganm mentioned the solid tantalum capacitors.

It's true that tantalum capacitors are known to have about a 10 year usable lifespan. Most Marquees in private hands these days
would be older than that so I think that is a VERY plausible issue to look for.

I would recommend that every tantalum capacitor should be replaced, not just on the CLM, but wherever they may be in the ciruitry, if the projector is more than 10 years old.

But wet slug tantalum caps have a much longer lifespan. I don't think you'll find any in a Marquee unless someone added them later,
but you won't have to replace those if you DO find any.

CJ

CIR Engineering · Posted: Fri Jun 18, 2010 9:54 pm Post subject:

Hey guys. Thanks for all the great tips Smile

Mike, I am going to call the client now and give him your phone number Thumbs Up

Another thing, after talking to the client he told me that one of his 60Hz scan rates is also having a problem. The 60Hz scan rate that is problematic is one that is 1080p, but it is blanked and enlarged to fit anamorphic DVD onto a 2.35 screen. IE, DVD's that are 16x9 inside a 4x3 frame with black bars on all four sides. I basically zoomed the image in the projector to fit his 2.35 screen and then blanked the image... this is confusing to explain...

This client bought the projector from Hi Rez many years back. He had just sent the projector to Hi Rez for an overhaul and had had it back for a few weeks or so before I calibrated it. Because of this, I suggested to the client that he also contact Hi Rez about the issue. This is the responses that the client got back from Hi Rez.

CIR Engineering · Posted: Fri Jun 18, 2010 10:17 pm Post subject:

I just talked to the client and we think the news is good. Scott, you may have once again proven to me the man. I gave the client instructions yesterday on adjusting the Lumagen timings. He applied new settings last night and ran the projector for 12 hours straight at 72Hz with no distortion Smile

Mike, I gave him your number and he said he'd call you if any issues come back.

I also relaid your suggestion Scott to power cycle the projector if the distortion returns.

KILLER! This was stressing me out

THANKS ALL!!!

craigr

dvh99 · Joined: 25 Dec 2009 Posts: 2158 Location: nederland

yes reducing width is ridiculous.
i run it at 100 with no problem and it has to be this way to maximize raster usage.
sometimes my pj is on for 8 to 10 hrs in a row running 1920*1080@72 or60 hz without a single hickup.
still i would look into replacing some tants like dragan mentioned just to be sure.