RE: Major Havoc

Just an update. There was a shorted trace between blue out and y in.

Kevin
 On Jul 2, 2012 10:16 PM, "Barry Shilmover" <barryshi@microsoft.com> wrote:

> I had one conversion board that had a tiny short between two lines which
> caused something almost exactly the same…****
>
> ** **
>
> *From:* owner-vectorlist@vectorlist.org [mailto:
> owner-vectorlist@vectorlist.org] *On Behalf Of *Kevin Moore
> *Sent:* Monday, July 2, 2012 6:29 PM
> *To:* vectorlist@vectorlist.org
> *Subject:* Re: VECTOR: Major Havoc****
>
> ** **
>
> Well it's not mine. I've never even seen or played a MH before. I'm just
> trying to fix it :) There was a bad +15reg, which I replaced, it's now
> putting out +-15 The image was worse before doing that. The Opamp and
> 1495's were replaced. The 6.8v Zener is on the money as well. But yeah
> there isn't much to it.
>
> Time to dig further.
>
>
>
> ****
>
> On Mon, Jul 2, 2012 at 4:44 PM, William Boucher <wboucher6@cogeco.ca>
> wrote:****
>
> The trace cuts and wires at the edge connector appear correct. Obviously
> from your pictures, the MH board is fine. I wish I could have your
> converter board in my hands for a few minutes to check it out but so much
> for wishful thinking. Since some of the geometry is correct but the colors
> are wrong, the screen is half sized, and there are retrace lines showing,
> it makes me wonder if your converter has lost one of the 15V regulator
> outputs. There's not a lot of stuff on those converters, mainly just the
> two regs, the 1495's, and the op-amp. I wouldn't think that a bad pot
> could make things that wonky but a shorted cap might. Check for 6.8V
> across CR5 just for fun.****
>
> ****
>
> Read the attached file. It describes a requirement to flip the small edge
> connector harness socket around to make the thing work. Maybe you did that
> already, maybe not. Now that I'm thinking about this possibility, it makes
> sense because the RGB and Y signals pass straight through the converter and
> so they should not be messed up but they are obviously so a reversed
> connector might explain it.****
>
> ****
>
> William Boucher
> http://www.biltronix.com****
>
> ----- Original Message ----- ****
>
> *From:* Kevin Moore <talon.k@gmail.com> ****
>
> *To:* vectorlist@vectorlist.org ****
>
> *Sent:* Monday, July 02, 2012 5:10 PM****
>
> *Subject:* Re: VECTOR: Major Havoc****
>
> ** **
>
> With adapter
>
> https://lh6.googleusercontent.com/-kuSOFoVWSjc/T_INTvUZ7mI/AAAAAAAAFuc/GjXsfribG98/s576/IMG032.jpg
> ****
>
> Without
>
> https://lh6.googleusercontent.com/-QK8776ybEzw/T_INOFKDIaI/AAAAAAAAFuU/ApzqCC7f-Tg/s576/IMG033.jpg
> ****
>
> Trace cuts****
>
>
> https://lh4.googleusercontent.com/-dkzXg5kK6Mg/T_INmIXFlmI/AAAAAAAAFuk/i3k3eXZpB3c/s576/IMG036.jpg
> ****
>
> On Jul 2, 2012 2:44 PM, "Kevin Moore" <talon.k@gmail.com> wrote:****
>
> Ok. Well I do have two cut traces, on the small edge connector, with two
> wires running to the DG201's I want to say Pin 7 it's not in front of me
> atm.
>
> The image I'm seeing is more than just a pincushion problem. I'll get a
> picture in a min.
>
> Kevin
>
> ****
>
> On Mon, Jul 2, 2012 at 2:39 PM, William Boucher <wboucher6@cogeco.ca>
> wrote:****
>
> Four things to note...****
>
> ****
>
> 1/ The T-to-MH conversion board provides pincushion correction that is
> needed to make MH look okay on a wg6100. Obviously the corrected output
> would look wonky on an Amp which requires no such correction.****
>
> ****
>
> 2/ The mods suggested for the wg6100 are not required to test out the
> game. Nothing bad will happen if you run the game without those mods.
> Assuming that the mods we are talking about are the addition of zener
> diodes across the transistors on the bottom of the deflection board, those
> were only added as a cheap way to limit the output current in the event
> that something went wrong with the game. The intent was to prevent major
> meltdowns of the monitor while the machine was on route and sitting there
> for many hours or days with a major problem. I have seen several cases
> where adding the zeners actually caused problems for certain games.****
>
> ****
>
> 3/ The MH board that you have may need a few small wire jumpers added to
> it in order to make it into a "conversion" version. Dedicated boards do
> not feed "pre-X" and "pre-Y" signals to the specific edge fingers as
> required by the conversion board.****
>
> ****
>
> 4/ Another difference between dedicated boards and conversion boards is
> the crystal frequency. There was a slight difference in the frequency
> introduced to make the apparent speed of the spinner seem more like the
> original roller controller. The slower clock has other effects as well,
> such as the pitch of certain sounds. The change may also have been made to
> slow down the vector drawing rate so that the wg6100 could better keep up.
> ****
>
> ****
>
> If you need, I can provide photos of my own conversion board output
> section so you can see which edge pads to first isolate and then wire to
> which pins****
>
> The crystal frequencies on my board are...****
>
> Y1 = 9.216 MHz****
>
> Y2 = 8.000 MHz****
>
> ****
>
> I'm pretty sure that the required changes are all documented in the
> original Atari conversion docs...****
>
> http://www.biltronix.com/Space_Duel_to_Major_Havoc_Conversion_Files.html**
> **
>
> The above link provides the docs pertaining to the Space Duel conversion
> but I'm sure that I have the Tempest specific ones if you need them (let me
> know).****
>
> ****
>
> ****
>
> William Boucher
> http://www.biltronix.com****
>
> ----- Original Message ----- ****
>
> *From:* Kevin Moore <talon.k@gmail.com> ****
>
> *To:* vectorlist@vectorlist.org ****
>
> *Sent:* Monday, July 02, 2012 2:39 PM****
>
> *Subject:* VECTOR: Major Havoc****
>
> ** **
>
> Have a question concerning the tempest to mh conversion.
> Just repaired a mh board, everything looks great on my pat9000 bench.
> That is until I plug in the conversion board set. The the video goes all
> sorts of bad. I've checked over the components on the adaptor board and
> have found no fault. ****
>
> Reading over the conversion documents it looks like there is some mods
> needed to the wg6100 before I go and do those mods I'd like to understand
> better what they are for. Mind you I'm running an amplifone setup in the
> pat so I would actually have to convert my tempest to check this thing out.
> ****
>
> Kevin****
>
> ** **
>
> ** **
>

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Received on Wed Jul 4 17:04:27 2012