RE: Ms. Pac-Man Monitor (WG?) bends UPDATE

 Tim,
 ****

  To answer some of your questions / clear things up,
If (as you have indicated) you have Color Bleeding, then
you may have to tweak things, (as you said, re-align the
electron guns) although I would Not reccomend this until
you have exhausted all other possibilities.

  As for Replacing the Capacitors (Cap Kit) this is the
First thing that I would reccomend, before taking any other
action(s).

  Finally, if you tweaked the ' Knob ' connected to the Flyback
(HV) Transformer, I would not worry in the least bit. You see,
 every (and I mean, Every) modern day (including this one) Monitor
has an X-Ray Protection Feedback Circuit built in. What this means
is that if the HV Level ever goes into a Runaway State (as I call
it) and climbs over 30+ KV (Actually Varies by make of Monitor)
this Circuit, typically shuts things down, immediately, that is unless
Your Monitor was worked over and the Circuit was Disabled (Not likely).

 Also even if you cranked the ' Knob ' on the HV all the way to whatever
Voltage, you think you are at (If you have a High Voltage Probe you can
also check this), the Monitor has over 1 Inch of Glass on the
Front(Face)
of itself, so no chance of anything really doing any Harm to you.

   
  Regards............
Arcadius...........

-----Original Message-----
From: owner-rasterlist@vectorlist.org
[mailto:owner-rasterlist@vectorlist.org] On Behalf Of Tim Soderstrom
Sent: Tuesday, September 12, 2006 3:17 PM
To: rasterlist@vectorlist.org
Subject: Re: RASTER: Ms. Pac-Man Monitor (WG?) bends UPDATE

Ok, the issue continues :)

I talked to a guy here at work who cleared up some of my questions. It
looks like I may need to re-align the electron guns to fix the color
bleeding, and I will likely need a capkit to fix the screen bending.
That said, I have a new concern and that was that I might have made a
mistake by playing with the knob connected to the flyback (on the right
side of the HV cage. He mentioned that tweaking this might cause X-rays
to leak out of the tube due to basically an overvolt. I thought I would
check with fellow arcade owners since his experience if for CRTs in
general. Should I be concerned about this? And if so, is there a place I
can look for adjusting this knob to normal limits?

Also, I am still looking for a local arcade / monitor repair shop in San
Antonio, TX. If anyone knows of someone, I would rather go with someone
by word of mouth than the yellow pages :)

Thanks as always! :) I thought I knew a few things from my experience
with my Space Duel cabinet. I was horribly mistaken :)

Tim Soderstrom wrote:
> Well, I didn't find anything marked as such.
>
> On the bottom of the neck, there are 4 POTS - one appears to be vsync,

> and the other 3 are R G B. There is also a black knob to the right
> side of the next (bolted to the frame) that appears to have something
> to do with the insulator cup since the big red wire from the cup goes
> into this gizmo. I tried adjusting that and it looked like it may have

> helped a little, but it was hard to say. The bottom right hand corner
> of the screen remained largely unchanged even after going to both
> extremes (counter-clockwise and clockwise). I ended up putting it back

> where I thought it was originally set to. I didn't want to touch the
> other POTS since they didn't appear related, and were on the next of
> the monitor (again the freak out thing :)
>
> To elaborate, the waves appear to bend downward on the top and bottom
> right sides of the screen. The middle appears to bend down and then up

> slightly, although the whole right side is not straight as a whole.
>
> Is there any documentation on these monitors? wellsgardner.com appears

> to only have information about their newer monitors and the
> instructions I have don't really tell me what to set (although I did
> find where they mentioned teh horizontal frequency; they just don't
> say where that is).
>
> I think at this point it might be best for my health and enjoyment
> just to live with it for now :) But if anyone has any further
> thoughts, they would be much appreciated.
>
> Peace Out,
>
> Tim
>
>
>
> On Sep 8, 2006, at 3:07 AM, Matt J. McCullar wrote:
>
>> There's a possibility that you may be able to "tweak" out that curl.
>> Granted, most monitors these days need to be "re-capped" anyway, but
>> in many cases that curling effect is a function of the monitor not
>> quite synchronizing with the horizontal sync pulse being generated by

>> the game's computer. Try adjusting the Horizonal Frequency pot in
>> the monitor (probably maked HFREQ) and see if this helps.
>>
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