CurtPalme.com Home Theater Forum

karmat63 · Joined: 19 Dec 2007 Posts: 157 Location: Italy

Some days ago I opened a thread about strange horizontal lines, across the screen:

https://www.curtpalme.com/forum_archived/viewtopic.php@t=36144.html

I thought I had easily resolved the issue, only changing the power cable, but I was wrong, they were still there. But as the lines were barely visible from my seating position (and only on very light background), after swapping CLM, Focus board, VIM and HDM board and HVPS, I gave up.

But today, some minutes after powering the Marquee, some black straight, fixed lines appeared throughout the screen.

https://www.dropbox.com/s/uw31mnnrifqncrl/Black%20lines%20%281%20di%201%29.jpg

Even stranger, the remote was locked, with only the power button active. Powering off the PJ and then on, it worked normally for some minutes and, then, here again the black straight lines across the screen.

Really have no idea of what's happening...

Tim in Phoenix · Joined: 21 Oct 2006 Posts: 4409 Location: Phoenix

Hello

Your control board has issues, or maybe the deflection processor board sitting on top of it. Try reseating all of the socketed chips.

karmat63 · Joined: 19 Dec 2007 Posts: 157 Location: Italy

Ok, done (I pressed with my thumb on every socketed chip, hope it's enough, as I've never pulled out any chip and I'm afraid I' will break something even with a chip-puller).
For the while the PJ is running with no issue, other than the (for me) usual faint horizontal lines across the image (barely visible only on light background)... but this looks like is something different...

Thanks a lot, I will update

Nashou66 · Joined: 12 Jan 2007 Posts: 16171 Location: West Seneca NY

Its U7 on the DPB. Best thing to do is pull all chips that are removable on all boards and clean them with DeOxit and some DeOxit protectant.

A little bit of maintenance goes a long way to a smooth running Projector or any electronics for that matter.

Athanasios

karmat63 · Joined: 19 Dec 2007 Posts: 157 Location: Italy

Thank you Nash, I knew that, but I don't know how pull out the chips safely.
Can you recommend the right hardware and tech to pull the chips out?

By the way, only pushing on every single chip on the CLM + daughter boards, got rid of the straight black lines across the screen (at last I looked at a whole movie without the issue). Vice-versa the "faint horizontal lines" are still there...

Nashou66 · Joined: 12 Jan 2007 Posts: 16171 Location: West Seneca NY

This is the type of puller I use. Pulls the chips straight up and out.

http://www.ebay.com/itm/Motherboard-Circuit-Board-PLCC-IC-Chip-Extractor-Puller-Tool-HM-/400699087113?pt=LH_DefaultDomain_0&hash=item5d4b86d909

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

be careful to put the chips back in facing the same way. There's an angled face with a dimple on the Chip and an arrow on the chip socket lip that needs to line up.
Oh and your Green G2 color temperature is too high Wink

karmat63 · Joined: 19 Dec 2007 Posts: 157 Location: Italy

karmat63 · Joined: 19 Dec 2007 Posts: 157 Location: Italy

A brief follow-up:
as per Nashou66 advice, I bought a chip puller and cleaned with deoxit all socketed chips on CLM, relative daughter boards, HDM and its daughter board. Reassembled the device and... tubes don't lights up; the Marquee makes a shorter routine at power on and then starts an high pitch buzz (as a small fan running at full speed) and nothing else. Sometimes (not always), the HDM Led lights on CLM diagnostic, so I tried to swap the HDM with another one known for working, with no success. Sadly I have no other working CLM to test, but I don't think there's anything wrong with the one installed...
Any idea?

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

clean the connector that goes onto the motherboard of the projector with alcohol (or deoxit).

also clean the connector of the dpb and the connector of the hdm and its daughterboard.

the clm cannot go bad all of a sudden.

karmat63 · Joined: 19 Dec 2007 Posts: 157 Location: Italy

**Curt Palme** · Posted: Mon Jun 16, 2014 1:39 pm Post subject:

You may need to replace the CLM. I have stock if you need one.

Tim in Phoenix · Joined: 21 Oct 2006 Posts: 4409 Location: Phoenix

Hello

You may have rotated one of the chips when you reinstalled them, check for that on all boards

Nashou66 · Joined: 12 Jan 2007 Posts: 16171 Location: West Seneca NY

karmat63 · Joined: 19 Dec 2007 Posts: 157 Location: Italy

haireez · Posted: Tue Jun 17, 2014 5:21 am Post subject:

Hi Karmat,

Lately, Barclay helped me to troubleshoot several HVPS for me and one of my HVPS exhibit black horizontal lines after repaired.

What happened was after cleaning the connector tip of the HVPS, the black sleeve got stuck to the metal tip and the contact to the splitter wasn't that good and it caused very bad horizontal lines. Therefore, i removed the HVPS cable out and loosen the black sleeve to ensure that it's loose.

I then re-installed the HVPS cable again to the HVPS splitter and the problem goes away till now without any issues. However, I'm not sure whether it might resolve your issue but i think it worth a try.

haireez · Posted: Tue Jun 17, 2014 5:26 am Post subject:

Just hope that this method will help to resolve your horizontal lines issue.

karmat63 · Joined: 19 Dec 2007 Posts: 157 Location: Italy

Thanks a lot haireez, this is very interesting... I will try as soon as my Marquee will power on again..

karmat63 · Joined: 19 Dec 2007 Posts: 157 Location: Italy

Don't know if this can help, but:

1) if I disconnect ALL the VDM cables, the high pitch buzz stops; if any VDM cable is connected the buzz starts again. Anyway, the tubes never fire...

2) If I disconnect one HDM cables, the buzz is still there

Nashou66 · Joined: 12 Jan 2007 Posts: 16171 Location: West Seneca NY