On 03/24/2016 1:44 AM, Top Cat wrote:
...
I hope someone can help me.
I have an extremely old CRT attached to a Space Invaders B&W arcade cabinet.
There is no available schematic, that I can find. The flyback has died but
there is no modern replacement, mainly because the documentation for the
historical model is non existent. So I dont know the input or output
voltages, I have no circuit diagram, and I cannot find anything to determine
what its input/output parameters can be. I do have the old flyback, I know
the monitor size, and I have the actual circuit.
The model is marked as "Toei GM-140 TV MONITOR". It was produced around
1979; or from 1976 onwards.
My question is this: Can one retro/reverse engineer or somehow determine
what modern equivalent could replace a flyback in this circumstance. Is
this possible?
YOu may want the game to stay as it is, but if you just want to play the
game, you may want to look at some of the converter boards made that will
let you use a VGA type of display, either CRT or the newer LED types.
I have Taito B&W monitor schematics that I am trying to scan, they are
old blueprints and they have turned VERY blue, so my colour scanner is
having a bit of trouble.
Email me and I will send you what I have...
John :-#)#
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(Please post followups or tech inquiries to the USENET newsgroup)
John's Jukes Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9
(604)872-5757 or Fax 872-2010 (Pinballs, Jukes, Video Games)
www.flippers.com
"Old pinballers never die, they just flip out."
Hi John, if I could look at what you have that might be the answer to my prayers. I can't find your e-mail though. Am I being dense? Is it glaring at me somewhere? Cheers.
Hi Chris,
I have now scanned my files and they are legible. Is there any marking
on your monitor? Letter and number codes? Failing that, what is the
number on the picture tube?
I scanned these as TIFs and they are huge (100mb) because they are
blueprints. If anyone can convert scanned blueprints to straight B&W I
would be happy to share these via dropbox.
My return email is valid! Or replace spam with jrr if you prefer.
John :-#)#
--
(Please post followups or tech inquiries to the USENET newsgroup)
John's Jukes Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9
(604)872-5757 or Fax 872-2010 (Pinballs, Jukes, Video Games)
www.flippers.com
"Old pinballers never die, they just flip out."