CurtPalme.com Home Theater Forum

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

I was setting up my 2600 when in the middle of the adjustments the red grid shifted up. Shocked

It is only the upper half of the grid. The grid will not move no matter what direction you are trying to go. Sad

The bottom half of the grid moves and works fine. It is only on the red, The green and blue grids are fine. I tried to set up a new channel. The red was working until about half way through the red adjustment when the upper half shifted up and would not move again. Mad

What could make only the upper half of the red non responsive?

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

Most likely the reggie bd is having problems. They look complex but you have to remember that there is three (really six) of everything. It's not impossible to fix them. Might be easier to get a replacement, though.

Scott

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

I will take it apart and clean the connections. This worked fine the last time I used it. But it has been sitting for about 3 years without even being turned on. I hope it just needs a good cleaning. I had this as a backup for my 2000 that was already mounted. I sold the 2000 to my sister (another CRT fan)and am now in the prosses of setting up the 2600.

**Curt Palme** · Posted: Mon Sep 18, 2006 3:43 pm Post subject:

Can you post a pix? (of the screen shots of the red test pattern).

Others here might want a pix posted of your sister, there's not many female CRT fans... Wink

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

I will post a pix tonight when I get home.It is very strange that it is only from the middle up. The numbers change on the remote as if you are adjusting it but it does not move at all. Sometimes when you first turn it on it will be right. Then after only a few seconds it goes all out of wack. But just the top of the red. Blue and green work perfect.

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

Here is a couple of pix. I can not get the lines to move at all. It is only vertical on red,top half of screen. The horizontal lines move as they should.

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

What's the 8XXXX number of the far right section (looking from behind) of your registration bd? For example my 2000 has an 81289. It should be printed on a small white sticker.

All the registration signals are made from a horizontal freq ramp and a parabola as well as the same signals that are vertical freq. These are divided into left and right signals as well as top and bottom. The circuit that handles your top red part is not working for some reason. Can be narrowed down to a specific part of the board.

Scott

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

Mine is numbered 81289 as well.

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

Do a 55 code and see if the red goes back to normal. The registration is to blame if it does.

If you have a scope or know someone that does it would be worth a look at IC47 pin 1. The signal is RED T LIN which is Red Top Linearity. That signal looks like it might be stuck full on. Or it might be the signal at IC47-3.

One helpful thing there is an identical signal for blue to compare to. IC48. Set the remote for red top lin at 33 and the same for blue. The two signals should be the same at that point.

Scott

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

I have no scope and that is a bit beyond my capabilities. I tried 55 code and it started to work but half way through the convergence it jumped up and stuck there. I did 55 code again and it did the same thing. It will start to adjust but before you can finish it will jump up and stick there.

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

Curt,
I am willing to trade out some parts for a good board. Smile

I have a 701s with toshiba tubes I am going to be parting out. I am sure we can come to an arrangement. Wink

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

Well today I was looking at my 3600 and it has the same convergence board,so I swapped them out. Smile

I went through the whole set up and it looked great. Smile

For about 2 minutes then the same thing the upper part of the red went all out of wack. Mad

I can turn it off and back on and it will be right for about 30 seconds then the top will move up all out of wack. Confused

something else is causing the problem.

**Curt Palme** · Posted: Sun Oct 08, 2006 8:28 pm Post subject:

Check the registration OUTPUT board. That might be it too. Otherwise, maybe CPU board or the ribbon cable between the motherboard and reggie board?

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

I feel so stupid. Rolling Eyes

I hate to even admit it but I fixed my problem. Wink

It was real simple, all I did was put the cover on. Shocked

I did not have the covers screws so it was not on. It seems that even after only a minute of operation a part was warm enough to stop working. Shocked

I picked up some screws yesterday and put the cover on then tried it out. It worked perfectly,I let it run for over an hour with no problems. Razz

**Curt Palme** · Posted: Tue Oct 10, 2006 4:45 pm Post subject:

That still doesn't sound right, unless your room temperature is over 90 degrees. Check the heatsink temperature, I'll bet one of the chips is marginal. THe set should run fine with the cover off with no overheating issues. I run them overnight in the shop all the time with the covers off to test run them with no issues.

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

This is the old thread about the same issue.

macgyver655 · Joined: 22 Aug 2007 Posts: 8508

Well if you had changed the entire registration board and no change that eliminates that.

Are all the fans running? That leaves convergence output, yoke interface ( try pulling the cards and reinserting them that change projector position) or possibly a bad yoke. The yoke would probably be affected by heat.

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

Ok you got me thinking and now it "Might" be fixed.

When I first got this PJ it had HIGH BEAM CURRENT shut down with the red tube. I replaced the red tube with one that I purchased from Ebay. It came with all of the electrics on it so I installed it complete. I just looked at the stickers on them and it has a different number than the other two even though they look identical in every way.
I almost through the old ones out this summer but stuck them in the shed instead. I pulled the red tube and changed them out. I have done a quick convergence on a new channel and it is holding so far.

Fujifrontier · Joined: 20 Oct 2007 Posts: 354 Location: San Antonio, Texas

i wonder what the difference is?

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

I let it run for a hour and a half with no problems. I will let it set overnight and see if it is still right in the morning.