Star wars picture issues...

solo742

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In the first screen of the test mode I get an novram error at (what looks like two squares) but game seems to play fine.

as for the picture, it seems ok, but in the test screens (crosshatch pattern display) the edges (Left/Right) are bowed in. How do I fix this?

Also the "raster screen display" the (solid/color) box on the inside is more of a parallelogram
(top side off to the right) How do I correct it?

I am planning a cap kit here shortly, but any other ideas would be great.

Thanks for any help.
 
What monitor ? If it's an Amplifone, I too have the "bowing in" on it.

web.jpg


The effect is called pincushion. On earlier Atari games there was a correction control for it on the game PCB's but they skipped it on SW because the monitor's yoke was supposed to be designed to correct it. It doesn't on my Amplifone though.

There is a solution:
DSCN2967.JPG


Clay Cowgill's pincushion corrector. He's busy with them but they're not actually shipping yet. We're bugging him about it on the vector list (register there and add some bugging ;)

http://www.vectorlist.org/
 
The NOVRAM is used for the high score save. If it's bad....your machine won't save the three top high scores. Otherwise, it'll play fine.

Edward
 
The monitor is the WG 6100

Still working on it. Hopefully, I do not have to mess with the yoke.

Thanks for the replies.
 
There's many adjustments responsible for what you see.
IIRC 6 Pots on the SW boardset
Rings on the tube
Yoke placement
Magnetic shunts.
and FWIW it sounds like you are seeing what you are supposed to be seeing you're not going to fix the pincushioning issue wihtout an aftermarket product nor how the solid box loks distorted/offset. Leave it alone. Also if you're doing a cap kit then also install an LV6100.

NOVRAM indeed is most likely a bad 2212. You can try reseating it.
 
Not if it's an Amplifone....

The pincushioning is caused by using a 100 degree tube (K6100 series) verses a 90 degree (Amplifone)
And is also why Cowgill only makes the pin cushioning corrector for the Wells series because it's the only one that has this issue.
 
The pincushioning is caused by using a 100 degree tube (K6100 series) verses a 90 degree (Amplifone)
And is also why Cowgill only makes the pin cushioning corrector for the Wells series because it's the only one that has this issue.

I think there is a case of some miscommunication here.

IF the OP has an Amplifone monitor in his cab, there is no need for a LV6100 or LV2000 because it's only for the WG6100. That was what I was trying to say.

If you think the Amplifone doesn't have a pincushion issue look at the picture I put up of my 25" Amplifone again....

And why would the pincushion corrector only work on a WG6100 ? It is correcting the deflection signals, those are the same for both monitors.
 
I think there is a case of some miscommunication here.

IF the OP has an Amplifone monitor in his cab, there is no need for a LV6100 or LV2000 because it's only for the WG6100. That was what I was trying to say.

If you think the Amplifone doesn't have a pincushion issue look at the picture I put up of my 25" Amplifone again....

And why would the pincushion corrector only work on a WG6100 ? It is correcting the deflection signals, those are the same for both monitors.

I understood you perfectly. I believe the 25" is a 100 degree tube which needs to use a K61XX series yoke. This is why you have pincushion issues with yours (it's normal) and why yours would also benefit having this this add on.. Also feel free to visit Clays site and read up on the pincushion corrector.
Clay calls it his "Wells Gardner Color Vector Monitor Display Corrector."
The 19" Amplifones do not have this issue thus why Clay probably didn't call it a "Star Wars pincushion corrector" and FWIW this also cured issues with K61XX series and Major Havoc.
 
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