15 February 2020, 15:17 | #1 |
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Help needed: Commodore 1084s-d2 bad color on one side
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15 February 2020, 17:07 | #2 |
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A degauss wand might be needed here.
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15 February 2020, 17:19 | #3 |
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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.
Last edited by mboot; 15 February 2020 at 17:30. |
16 February 2020, 11:58 | #4 |
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A degauss wand will definitely solve the problem.
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16 February 2020, 12:43 | #5 |
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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...
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16 February 2020, 16:01 | #6 |
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One thing you might want to check is the degauss coil that is wrapped around the tube.. Is it still properly in place.
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16 February 2020, 16:21 | #7 |
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Yep. It is in place, but i am not sure if it is working.
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16 February 2020, 22:03 | #8 | |
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Quote:
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. |
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17 February 2020, 03:19 | #9 |
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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. Last edited by Hewitson; 17 February 2020 at 03:20. Reason: Misread |
17 February 2020, 03:45 | #10 |
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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? |
17 February 2020, 03:50 | #11 | |
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I believe this is due to the monitor originally being mounted vertically (I rotated it to horizontal). |
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17 February 2020, 08:26 | #12 |
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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.
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17 February 2020, 14:47 | #13 |
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17 February 2020, 14:58 | #14 | |
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I removed the 2 speakers which definitively solved the problem. of course after i had to use external speakers ... |
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17 February 2020, 15:01 | #15 | |
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I already thought about that but was hoping that i didn't have to remove them. |
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17 February 2020, 15:25 | #16 |
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17 February 2020, 15:52 | #17 | |
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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: |
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17 February 2020, 16:44 | #18 |
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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.... |
17 February 2020, 16:54 | #19 |
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17 February 2020, 19:34 | #20 |
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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. |
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