CurtPalme.com Home Theater Forum

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

35c seams ok to me. I am sure those chips will handle much more heat, the rear heat sink I think gets hotter than that.

How long has the 34kv supply been running now?

Id leave it there for a few days and watch some movies to see how it holds up before putting the 34.9kv back in.

Athanasios

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

HK-Steve · Posted: Sat Feb 26, 2011 1:35 pm Post subject:

No parts changed, except the splitter,
I don't think it is the splitter because there are no burn marks, holes or spots to short to the chassis. Unless you think otherwise.

Projector has run for 5hrs no issues, will run it again today.

Cheers
Steve

Sparky015 · Posted: Sat Feb 26, 2011 1:49 pm Post subject:

Steve, is it possible the 34KV supply is a low enough voltage that the issue does not arise? I'm wondering if there isn't something internal to one of the tubes, or the neckboard attachments on the tube pins that are OK at a lower HV, but not at the 34.9KV.

HK-Steve · Posted: Sat Feb 26, 2011 3:33 pm Post subject:

Appreciate your comments, but I don't think an extra 900volts would make much difference.
if there is an issue with the HV section of the tube, I would expect it to be shorted from say 2kV and up

at the current 34kV, I would think the tube wouldn't know the differece to 34.9kV
I may be proven wrong yet,

Cheers

HK-Steve · Posted: Sun Feb 27, 2011 8:18 pm Post subject:

some more feedback,

34.9kV HVPS installed,

Pressed the power button,
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all running fine, no POP or BANG

So, now leads me down a path or what was the original problem.
Now confused.

Cheers
Steve

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

Steve, that is strange.

Now we have to ask, was Scott's original theory of incoming current rush the issue?

Did anything Change in his home? new HVAC system, new dishwasher, etc and or was there any new power authority work in his area? Like new transformer etc. Its just a wild theory but could it have been nothing wrong with the PJ to begin with but more an issue with the AC power from the power company?

Just a wild thought...

Athanasios

nidi · Joined: 17 Aug 2008 Posts: 305 Location: Switzerland

we do not have HVAC systems in our hones here in Switzerland Shocked

nothing changed.

Michael

HK-Steve · Posted: Mon Feb 28, 2011 3:30 pm Post subject:

Athanasios, Just a wild thought...
Hmmm, Now where have I heard that before, Ha Ha, just joking.

Wild thoughts are good, but unfortunately, nothing has changed as Michael, nidi, said.

I have been running the projector for 3 days now, no issues.
This is just frustrating now, we still don't know the answer.

GRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRR

Cheers
Steve

HK-Steve · Posted: Mon Feb 28, 2011 3:38 pm Post subject:

the incomming rush current, is not an issue as far as I am concerned,
because, nothing had changed in the projector after running for the last 9+ months with no power up issues.

One day, the HVPS fues exploded, Michael ordered a HVPS from Curt,
put it in, fuse exploded, (no blame or flames to Curt)

I repaired the HVPS, fuse exploded.

After comments about better protection on the 34kV HVPS, got my hands on one, thanks to the anonimous person,
fired up the projector, and well what do you know it runs no issues. Dam.

So put in the 34.9kV HVPS, and it runs like nothing had happened.
I am going to get Michael's projector back to him to run it as much as possible, on thursday fingerscrosed.

Big question, where to point the finger????????

Cheers
Steve

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

So the PJ was running fine at your house? Did a HVPS all fail at his location or yours?

Athansios

HK-Steve · Posted: Mon Feb 28, 2011 8:04 pm Post subject:

All 3 failed at Michael's house.

Power point, (outlet), was checked, is all good, so not suspected as an issue.

My power voltage is a little higher than Michael's, he has 231volt output, I have 235volts.
Ground in both Michael's house outlet and mine are good, 0.01 Ohms projector power to any ground point.

Should we send over a witch doctor??

Cheers
Steve

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

nidi · Joined: 17 Aug 2008 Posts: 305 Location: Switzerland

Steve disassembled the whole thing and moved it in parts.

the projector ran for 4 months straight before I suddenly had the fuse explosion
and ironically after I told Steve how well the projcetor worked.

Michael

HK-Steve · Posted: Mon Feb 28, 2011 8:20 pm Post subject:

After taking the projector down from Michael's ceiling,
I broke the projector down to every circuit board removed, mother and daughter board removed, wiring loom removed.

Found no issues at all, no extra screws, no parts fell out.

Place the projector on a table in my workshop, put it all back together, with the screws in the same spots, anal like that I am Rolling Eyes

Then reinstalled the tubes and put in the 34kV HVPS. You know the rest.

Appreciate the comments, keep them comming, like your thinking.

Cheers
Steve

HK-Steve · Posted: Mon Feb 28, 2011 8:24 pm Post subject:

Hey Michael.

Projector is still running with the 34.9kV HVPS, so Thursday looks good.

Cheers
Steve

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

HK-Steve · Posted: Tue Mar 01, 2011 10:02 am Post subject:

Hey All,
Just something I found, the HVPS cable is rated for 50kV and also has the clear plastic sleeve over the cable.
Each of the 3 tubes has 40kV cables with no sleeve, think this is an issue????

Cheers
Steve

HK-Steve · Posted: Thu Mar 03, 2011 7:00 am Post subject:

Any comments on the cables ratings??

Cheers
Steve

gjaky · Joined: 05 Jun 2010 Posts: 2802 Location: Budapest, Hungary

I don't think it would be a problem
My 7500 and 9000 have the same cable setup, and no problem with them. there is "only" ~35kV coming from HVPS so a 40kV cable is enough.
Anyway a simple HV arcing usually don't cause the fuse blowing.