Help needed: Commodore 1084s-d2 bad color on one side

[mboot]

Hi to all. I just got a 1084s-d2 from ebay but it has some red color on the right side. Now i'm not sure if it is an easy repair or if i should return it, as it was not a cheap buy.


Here it is a photo of it:




thanks in advance

[Jope]

A degauss wand might be needed here.

[mboot]

Well, i almost removed it with a magnet but it cames back after a while if i power it off and on again. So i am not sure if a degauss wand solves it.

[Hewitson]

A degauss wand will definitely solve the problem.

[mboot]

Thanks for the help guys. Will try it with a wand. Any idea where i can get one? I have looked online but cant find any on Europe...

[Jope]

One thing you might want to check is the degauss coil that is wrapped around the tube.. Is it still properly in place.

[mboot]

Yep. It is in place, but i am not sure if it is working.

[Krashan]

Originally Posted by mboot

Thanks for the help guys. Will try it with a wand. Any idea where i can get one? I have looked online but cant find any on Europe...

You can try with poor man's degaussing loop. Get a transformer soldering gun and fit a "tip" in a shape of small circle (diameter about 3 cm). Then use it as normal loop, just remember it is very hot, so don't touch anything.

When the gun is turned on, very high current (100 A or more) flows through the tip. When the tip is made bigger than usual, strong alternate magnetic field is generated, which can demagnetize CRT screen mask.

Note that the soldering gun should be turned on and off away from CRT. Turn it on, then move toward the screen, keep demagnetizing for 30 seconds, then pull away and release trigger. Keeping the gun turned on for more than a minute may overheat it.

[Hewitson]

The inbuilt degausser is pretty useless on most CRT's. For any major screen gaussing, you'll need something with a much stronger magnetic field.

Cheap Degaussing wands are available on ebay, but you'll need to be careful with them. They get extremely hot and can easily melt or even catch fire if common sense is not used.

[AmigaHope]

If you fixed it but it comes back, there's a problem with the degaussing coil and/or your environment in your monitor that is actually making the problem occur.

What happens when you angle the monitor in different directions in your room or on your desk? What if you set it on its side?

[Hewitson]

Originally Posted by AmigaHope

If you fixed it but it comes back, there's a problem with the degaussing coil and/or your environment in your monitor that is actually making the problem occur.

When I first got my arcade machine, I had to degauss the monitor several times for the fix to stay permanent. The discolouration would come back in several hours/weeks.

I believe this is due to the monitor originally being mounted vertically (I rotated it to horizontal).

[Jope]

Originally Posted by Hewitson

The inbuilt degausser is pretty useless on most CRT's. For any major screen gaussing, you'll need something with a much stronger magnetic field.

Yes, because it is not there to fix uneven magnetization like in the OP's monitor. The degauss circuit is there so that the monitor's shadow mask (which is assumed to be evenly magnetized) is in harmony with the earth's magnetic field no matter what direction the tube is facing.

[mboot]

I have bought a cheap soldering gun this morning and i can see it indeed creates the magnetic field, but no matter what the red spot is always there.

About the environment, i turned the monitor the other way around, moved to another place and it doesn't make any difference...

Soldering gun:

[CFou!]

Originally Posted by mboot

Hi to all. I just got a 1084s-d2 from ebay but it has some red color on the right side. Now i'm not sure if it is an easy repair or if i should return it, as it was not a cheap buy.


Here it is a photo of it:




thanks in advance

one of my monitor may be a 1083 regularly had the same problem that was caused by the built-in speakers.

I removed the 2 speakers which definitively solved the problem.

of course after i had to use external speakers ...

[mboot]

Originally Posted by CFOU!

one of my monitor may be a 1083 regularly had the same problem that was caused by the built-in speakers.

I removed the 2 speakers which definitively solved the problem.

of course after i had to use external speakers ...

I already thought about that but was hoping that i didn't have to remove them.

[CFou!]

Originally Posted by mboot

I already thought about that but was hoping that i didn't have to remove them.

i had several monitors, but only one had this problem.

Perhaps degauss hardware have a problem.

when you turn on the monitor, do you hear the activation of the degauss?

[mboot]

Originally Posted by CFOU!

i had several monitors, but only one had this problem.

Perhaps degauss hardware have a problem.

when you turn on the monitor, do you hear the activation of the degauss?

No, i actually don't know if that is a strong noise as in vga monitors or a weaker noise, so i am not sure if it is working.


I have read that the posistor get broke a lot but i am not sure if it is possible to get a new one to try it out.


Meanwhile i took a photo of it:

[CFou!]

with my 1080S is a is a strong noise in my memory but less strong than VGA monitor.

If you're interested, I could make a short video tonight while powering up my 1084s to compare....

[mboot]

Originally Posted by CFOU!

with my 1080S is a is a strong noise in my memory but less strong than VGA monitor.

If you're interested, I could make a short video tonight while powering up my 1084s to compare....

That would be great...


Thanks

[CFou!]

i very i have an 1084S-P1.

My memories were not good.
I tried to make a video but we hear nothing in fact unlike a VGA which makes a big noise, the 1084s makes a very slight hiss.