Tron Monitor - Some Life

A step in the right direction tonight. I resoldered a few of the jumper
wires on the 130VDC trace along the front edge of the PCB. I now have a
picture of sorts on screen wheras before I had nothing.

Current issues are:

1. REALLY bad horizontal (vertical for tron) tearing (or is it bleeding?) ,
nearly 2 inches long.

2. It appears I have three images on screen, or the picture is rolling so
much I am getting an animation, picket fence effect and seeing three images.

3. Was not quite able to get the image to stabilize vertically (that is
really horizontally for Tron, but vertically as the monitor sits now)

Anyone have any ideas on any one or more of the three issues? Pics here:
http://forum.arcadecontrols.com/index.php/topic,33450.msg291163.html#msg291163

----- Original Message -----
From: "James McGovern" <James@RetroBlast.com>
To: <rasterlist@vectorlist.org>
Sent: Wednesday, March 16, 2005 8:49 PM
Subject: Re: RASTER: No picture on k4900 - dumb VOM question

> So next steps and results are:
>
> - Examine the jumper wire J33 as well as other jumper wires on the 130VDC
> trace. (Done and look visually intact and ok)
>
> - Inspect chassis for bad solders and or hairline cracks in pcb, (done and
> looks ok, have not resoldered anything yet. )
>
> Measure voltage at the metal case of Q352, the transistor on the side of
the
> chassis closest to the HV unit.
>
> Question: I am a bit confused by the statement, "Measure the voltage at
the
> metal case." Does this mean that my red lead will go on the metal housing
> on the outside of the chassis with the COM lead to the chassis frame?
>
> Is it that white compound that unsulates the frame from the metal case?
>
> In the pic below you can see the transistor, Q352 in the yellow box to the
> right.
>
>
> pic is here:
>
http://forum.arcadecontrols.com/index.php/topic,33450.msg290847.html#msg290847
>
>
>
> ----- Original Message -----
> From: "James McGovern" <James@RetroBlast.com>
> To: <rasterlist@vectorlist.org>
> Sent: Monday, March 14, 2005 1:45 PM
> Subject: RASTER: No picture on k4900 - dumb VOM question
>
>
> > I had a little time to look through the k4900 manual and flowchart. One
> of
> > the first items to test according to the flowchart is:
> >
> > "Check the regulated power supply at resistor r503...terminal closest to
> the
> > fuse should read +130vdc"
> >
> > So my question is, I am assuming that I place the red test lead on my
VOM
> on
> > the r503 terminal closest to the fuse as directed...where though do I
> place
> > the common lead?
> >
> > You can see the flowchart and the manual here (
> > http://home.earthlink.net/~rescuetron/ ) in today's post or in the
> > "Pictures and Documents" section in the sidebar.
> >
>
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> >
> >
>
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>

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Received on Thu Mar 17 00:19:50 2005