CurtPalme.com Home Theater Forum

vespaman · Joined: 15 Jan 2008 Posts: 31 Location: Stockholm

Hi guys,

Since yeasterday, my 9500 don't like me anymore. Crying or Very sad

While watching a movie, it just blackens out, and then (normally) the pic comes back (starting out of focus, and the good after a second or so). Sometime it does not comback, I have to power cycle. Sometimes it comes back, but I have to press a recall to get teh alignment back.

I can hear no arcing, or anything, it just dies. But I have a feeling this is related to the HV. I re-seated the HV and LV supplies, but same thing. No LED's on the LVPS, no clicking, nothing.

It is too late here to start anything, but I guess I should try no re-seat the some boards tomorrow. Any suggestion where I should look first? I have already changed the HVPS once... Crossing fingers...

Cheers,

Micael

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

This Sounds like a bad HVPS do you have a spare to swap out? I am curious as to what year the PJ was made and how many hours are on it. maybe we can see what year and at what hour count these HVPS failures are happening on some PJ's. Seems like this past month there have been a slew of HVPS failures
on Marquee's and I would be curious to see what correlation if any between these failures .

Athanasios

vespaman · Joined: 15 Jan 2008 Posts: 31 Location: Stockholm

I thought so. Sad

Finding HVPS's is not my favorite thing (you never know what you get), and around where I am at, they don't grow on trees.
And I don't have any spare to change with either.

I don't know how old this HVPS is, since I bought it used about 4 years ago, to replace the one I had, which went out with a gun-shot sound. Even that one, I don't recall if it came with the chassi or if I got it from some other machine. I bought this 9500 in a very bad shape, it had ~20k hours on, so I have since changed the tubes, all cap's and done quite a lot of mod's on it.

Is there anything else that could be the problem, or should I start chasing HVPS'es ?

Cheers,
Micael

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

the symptoms posted sound very much like HVPS , sorry Sad

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

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

So did you resolve this issue?

Athanasios

vespaman · Joined: 15 Jan 2008 Posts: 31 Location: Stockholm

Hehe, are you psychic? I just got (literally 5 minutes ago, just before I turned on the computer this morning) a HVPS delivered to my doorstep. I will install it later on today.
I have rerouted my HV cables under the tubes, and if my memory serves me right, it is a bit tight to get the HV cable connected to the splitter, so it will probably take me some time.

I'll be back!

Micael

vespaman · Joined: 15 Jan 2008 Posts: 31 Location: Stockholm

I did not work, changing the HVPS. Either the new one is broken as well, or something else in my proj is.

With the new HVPS it works for some time, and then the pic goes black, but I think it is not coming back as easy as with the old HVPS, it always comes back after a power off/on.

I have tried knocking on focus and HDM, and also the LVPS, but no go. The light in the HVPS seams to be on all the time, even when pic is gone. Is this an indicator for HV still around, or is it showing that the 390V (or whatever voltage it was fed from LVPS, memory is short..) from the LVPS is around?

I will ask the seller (a forum member) again, if he is *really* sure this one is supposed to work.

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

Are there any lights on the LVPS? I wonder if its the HV splitter? Also have you checked the CLM, press down on all the socketed chips and remove and reseat the DPB, this is just a shot in the dark.

Athanasios

Sparky015 · Posted: Sat Jul 18, 2009 12:38 am Post subject:

Maybe a stupid question, but any error lights when the picture goes dark that may indicate which module is the problem child?

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

the fact that the problem is still there but simply behaving differently suggest the new HVPS is bad too. A lot of times people part out a machine because it wasn't functioning properly so chances are 1 or 2 buyers will get a bad part.

esotero · Joined: 20 Jul 2009 Posts: 3

Have the same issue with my 8500 Ultra. The problem is very sporadic and I can go for a good 10 hours with nothing unusual happening. Other times the picture flashes out and in several times in varying 2/10 minute intervals. Let me know if you find a solution. Not sure I want another HVPS until I know it will actually help.

1031 · Joined: 22 Mar 2006 Posts: 657 Location: Finland

One thing that might do this (muted picture->comes back out of focus->focuses again...) is that OVP kicks in, there is two small trimmers at side of HVPS. one is labeled HV and another is OVP (over voltage protection) If that small trimmer starts to lose its contact it may trigger OVP and show that kind of symptoms. Those trimmers are something that needs to have proper HV testing gear to adjust right. But if you mark position of that ovp trimmer and turn it 3 rev to cv and then 3rev to ccv it might help..

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

vespaman · Joined: 15 Jan 2008 Posts: 31 Location: Stockholm

So, after googling my problem, it seams that almost every board can induce this kind of problem. So yesterday I started off pulling HDM, Focus, CLB boards out. Cleaned them, pulled all piggy-back boards our, cleaned them, pulled all IC's from their sockets, and cleaned them as well. Cleaned the contacts on LVPS & the HVPS.
The only board that I did not do anything with, was the VNB's and the VIM, as it is a bit complicated to pull it out, since my home cinema has a lowered ceiling just behind the projector.

My main suspect are the CLB and the HDM, but who knows.

After two+ hours of play, it still works without a glitch. Even though I will run it for more hours before closing the case, it seams to me, that I have it fixed now.

Sad that I bought a HVPS, but then again, I can always make the big capacitor modification to one of them without worrying too much about the consequencies.

Thanks,
Micael

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

Yepp, i bet it was the CLB and DPB . that is always the first place to look, then the HDM.

Athanasios

radar · Joined: 05 Dec 2007 Posts: 72 Location: Sydney, Australia

Hmmm interesting... Yesterday, I'm starting to have that exact same problem on my 8500. The image dissapears then, after a while 3-30seconds it comes back on. Whilst the image has dissapeared, the h-fail light is on (but goes out when the image comes back on). On switching the PJ off and on again fixes it for a while. After maybe 1/2 hour, it seem to be ok. Maybe just co-incidence. I'm pretty sure its the CLM, so I'm going to give it a good clean and see what happens.

I'll have to check my hardware store for... I think its... deox? can't remember the name. To clean the board.

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

radar · Joined: 05 Dec 2007 Posts: 72 Location: Sydney, Australia

Couldn't find denatured alcohol... but used Metholated Spirits. Also couldn't find Deoxit either. Having said that, I did clean the CLB and DPB and took all chips out (that were removable) and put them all back in again (did this 3 times). BTW... I found that an old electric toothbrush works really well!

Well... so far... it "appears" to have done the trick. I'll turn it on for 1 hour every day or two and report back in a week. I suspect that not having used the Deoxit means I may not get a long term fix.

**Curt Palme** · Posted: Sat Jul 25, 2009 3:15 pm Post subject:

I used DeOxIt on an HDM earlier this week. you just breathed on the HDM originally, and the set would shake or go into an H fail. A couple of small shots of Caig stuff on the sub board and main contacts, and short of unseating the HDM from its main socket, that image was solid as a rock!