CurtPalme.com Home Theater Forum

**AnalogRocks** · Posted: Thu Dec 21, 2006 1:53 am Post subject:

Horizontal phase wierdness.

Why is it when I run 480P I have the phase at 50% then when I switch to 960P I have to have the phase closer to 80% in order to centre the image on the screen?

480P is out of the line doubler and 960P is out of the HTPC.

papalek · Joined: 08 Mar 2006 Posts: 1536 Location: Longs SC

porch settings.

**AnalogRocks** · Posted: Thu Dec 21, 2006 4:33 am Post subject:

Ahhh the overhangs strike again.

Ok then can someone reccomend porch settings that will allow the projector to play nice between the doubler and the HTPC.

OR

Is there any danger from running the PJ with the HZ phase at 80%?

papalek · Joined: 08 Mar 2006 Posts: 1536 Location: Longs SC

I just set up each input on its own channel. I don't worry about the settings as long as the image is on the tube face you are good to go.

**AnalogRocks** · Posted: Sun Dec 31, 2006 3:38 am Post subject:

Ok here we go again. .

1st problem. how the hell do you get these out of Executive mode? I punched 37 code by mistake instead of 38 code and now I'm stuck I can't do anything.

The HV issue is back.

Funny this set was working well. I haven't used it in about a week and a half so it was unpluged. I redid the setup tonight and left it on for about and hour. When I got back I got the picture flicker and the HV fail count was up by 4.

I have the case open, most controls are within the 60% range and I have a fan on it pointed at the power supplies.

Whatda think? The old un-reliable spellman is about to bite the dust for the 3rd time?

papalek · Joined: 08 Mar 2006 Posts: 1536 Location: Longs SC

909 Code will get it out of executive mode.
I am beginning to think you have something else that is taking out the HVPS.
Seems really strange that 3 good working power supplies that were working in their own PJs soon become toast in yours.

**Curt Palme** · Posted: Sun Dec 31, 2006 4:23 pm Post subject:

Yeah, the last two HVPS were working fine here for 48 hours before sending them.

I've suggested running the set with the HV leads disconnected going to the tubes. Let it run for 24 hours and see if the HV error codes come up. The only thing that the HV supply feeds is the tubes and the G2 leads. Some of them route the G2 leads to the V board, but I've never had a V board cause an HVPS to go out.

**AnalogRocks** · Posted: Sun Dec 31, 2006 5:04 pm Post subject:

Thanks Papalek.

Ok Curt I'll fire it up like that. I replied to you email too.

I have noticed the red shake on it's own. Maybe a bad neck card? We'll see after you have a chance to look at the old supplies. I'll drop them in the mail on the 2nd.

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

Something to check. The bulk power for the HVPS comes from the SMPS. If the two big electrolytic caps are getting tired the power for the HVPS might be weak. It should be near 300VDC if your AC line is 115V (or 220V). It can be measured on J44 on the mother bd just in front of the HV. Green and yellow wires. (Green. Aargh!) If later model J44A which is usually brown and orange wires. Be careful! Both wires are HOT! ZAP! ZAP! Very dangerous.

Scott

**AnalogRocks** · Posted: Sun Dec 31, 2006 7:50 pm Post subject:

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

Green wires should only be used for chassis/earth ground. Especially never for a power rail.

Regulations concerning X-rays pretty much mandated having an overvoltage shut-down circuit in the HVPS. The one in the Spellman is set to trip at just slightly over the nominal output voltage. It also happens immediately. Maybe they should have loosened that up a little and put a short time delay in the circuit so it wouldn't trip from transient static discharges and momentary overshoots of the output.

Scott

**AnalogRocks** · Posted: Sun Dec 31, 2006 8:19 pm Post subject:

Ahhh of course green is ground. I new that.

Is there a way to mod the circuit to not shut down so quickly?

**AnalogRocks** · Posted: Mon Jan 01, 2007 10:18 am Post subject:

What does it look like when a neck board is faulty? I ask because the red on this set has always had the shakes or a twitch.

15 hours into the HV supply no load test. All six leads are disconnected from it. NO shut downs or problems of any sort. It does run hot though even with the case open and the fan on it.

Later today I'll start re-connecting the tubes one at a time to see which one is funky.

**AnalogRocks** · Posted: Mon Jan 01, 2007 8:34 pm Post subject:

Right 25 hours no load test complete. No failures. Currently running the RED CRT only. As of 3:30 pm HV fail count 189.

**AnalogRocks** · Posted: Tue Jan 02, 2007 6:25 pm Post subject:

**AnalogRocks** · Posted: Fri Jan 05, 2007 1:43 am Post subject:

Tested Green and Blue for 24 hours each. HV fail count 189. No change

How ever I just started watching it. I think I have it figured out. The red tube had horizontal lines shaking from side to side on the top half of the tube ( bottom half of the screen ) with the Registration ON. It goes away with the registration off.

Guess it's a bad registration board?

The other thing I wonder is if this is a totaly seperate problem. Can the Registration board cause a HV tic or a HVPS failure?

papalek · Joined: 08 Mar 2006 Posts: 1536 Location: Longs SC

You might have to try it again with two tubes hooked at once.

**AnalogRocks** · Posted: Fri Jan 05, 2007 7:26 am Post subject:

I was thinking that too but I wanted to see what Curt's take was on this first.

**AnalogRocks** · Posted: Sat Jan 06, 2007 4:58 am Post subject:

Ok I ran it for about an hour with all three tubes on. I actually watched a TV show(wow). Shortly after the show ended the HV tic came back. I tried swapping LV power supplies and a strange thing occurred. The voltage between the two units must be quite a bit different as I had to crank the brightness from 52 to 57 and the contrast from 69 to 80 to get a simular picture. This did nothing for the HV tic of course but I'm out of HV power supplies.

Also the red did NOT exhibit the half tube boogie tonight with the top half of the tube shaking. I thought that would show up but it didn't.

I'm waiting on Curt's CSI of the old power supplies. I mailed them out yesterday.

In the mean time I'll poke and prod to see if I can find a loose connection on the registrationg board and I'll check the neck cards again.

**AnalogRocks** · Posted: Sun Jan 07, 2007 1:28 am Post subject:

Well. I powered it up a couple of minutes ago and SNIC. HV restart. The count is now at 190.

I was just about to set it up blue with green to see if those two had probelms together. All three tubes restarted as normal.