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Main => Monitor/Video Forum => Topic started by: drawfull on December 21, 2008, 03:09:54 am

Title: [s]Garbled edges of vertical lines[/s] I am lucky to be not dead :)
Post by: drawfull on December 21, 2008, 03:09:54 am

Hi

I am new to monitors, with regard to having to make them work, so am looking for some advice.

I got a brand new noname 20" standard resolution monitor for my Gauntlet cab, but (apart from the brighness issue in this pic) I get awful wavy edges to all and any vertical lines.

At this time I  have not installed the degaussing coil and its shield braided cable, but I don't believe that would cause this prob. Any help much appreciated :)

(http://forum.arcadecontrols.com/index.php?action=dlattach;topic=51525.0;attach=114690;image)

EDIT: I am stupid and although I haven't attempted to fix the problem, I think I have been fckng lucky. I forgot to attach the ground strap to the chassis. I haven't touched the rear of the tube to check but my spider-sense tells me that this is likely to be sat at 25kV and almost certainly causing the problem (spider-sense = wiki here and google). I have had my hands everywhere in there tweaking pots while looking at the screen...  :-\

 :blowup:

The reason I didn't attach the ground was, erm, well, uh, because I couldn't find the pin to plug the header onto. What can it hurt, right? Well if I'm not totally off base I believe when I remove the door of my cab later I will see a single header on the neckboard PCB.

So yeah, I guess it's prudent to do more research before messing around with stuff you don't understand.

Stupid question 38: How the hell is the ground strap thing supposed to attach to the monitor anyway? It has three loops but I can't see any physical fixing points on the chassis.

Thanks in advance

n00b :(

Title: Re: [s]Garbled edges of vertical lines[/s] I am lucky to be not dead :)
Post by: grantspain on December 21, 2008, 04:49:34 pm

the brightness issue is down to the screen volts being too high-hence the flyback lines
post some pics of what you are saying about the wiring as you are not making any sense

Title: Re: [s]Garbled edges of vertical lines[/s] I am lucky to be not dead :)
Post by: qrz on December 26, 2008, 03:24:36 pm

Quote

Stupid question 38: How the hell is the ground strap thing supposed to attach to the monitor anyway? It has three loops but I can't see any physical fixing points on the chassis.

not a stupid question .

each of the three loops go around the crt mouning ears .  usually the top/bottom left and the top right.
a spring connected to the braid will then connect to the bottom right and provide tension.
this usually done before mounting the crt  ;)
there should be a wire from braid to chassis ground, and to ground on the crt socket.

qrz