TOEI MUSSAN - Flyback - Vector Monitor - UK Vintage Radio Repair and Restoration Discussion Forum

gavinmorgan · 17th Apr 2013, 6:39 pm

Another strange one for you ......

Not strictly a TV I know, but worth a try if anybody here used to fix video arcade monitors in the 70's and 80's ?

TOEI of Japan produced a range of specialist vector video monitors in the early
1980's for arcade machines of the time.

Asteroids by ATARI uses a vector monitor for those who may not be familiar
with them.

Anyway, I have a cocktail (tabletop) arcade Asteroids game licenced to Taito
Taitronics (of Space Invaders fame).

This uses a 14inch vector monitor manufactured by TOEI MUSSAN CO LTD of
Japan and it requires a new flyback (apparently).

I have attached a copy of the schematics of the chassis.

Can anybody help me out with this please ?

Thanks,

Gavin

Radio Wrangler · 17th Apr 2013, 10:23 pm

You haven't said what's wrong with it yet!

The power supplies and the EHT generator are all pretty straightforward.

The deflection amplifiers appear to be on three custom ICs, which could be thick-film hybrids... but are going to be a problem if you need replacements.

David

ukcol · 17th Apr 2013, 11:39 pm

Quote:

Originally Posted by gavinmorgan

.......and it requires a new flyback (apparently).

I took the original post to mean that Gavin was trying to source a replacement flyback transformer ?

Colin M

Radio Wrangler · 18th Apr 2013, 1:25 am

An open winding? Insulation breakdown? If the EHT section is OK, a re-wind of the rest should be possible.

The CRT should be a pretty normal type, but the symmetrical deflection yoke will be unusual.... that said TV parts ought to be adaptable to bias and power the CRT.

David

cmjones01 · 18th Apr 2013, 9:45 am

You say 'apparently' it needs a new flyback transformer. How do you know? What are the fault symptoms? We should start with those.

Chris

17th Apr 2013, 6:39 pm	#1
gavinmorgan Retired Dormant Member Join Date: Jan 2013 Location: Abergele, North Wales, UK Posts: 13	TOEI MUSSAN - Flyback - Vector Monitor Another strange one for you ...... Not strictly a TV I know, but worth a try if anybody here used to fix video arcade monitors in the 70's and 80's ? TOEI of Japan produced a range of specialist vector video monitors in the early 1980's for arcade machines of the time. Asteroids by ATARI uses a vector monitor for those who may not be familiar with them. Anyway, I have a cocktail (tabletop) arcade Asteroids game licenced to Taito Taitronics (of Space Invaders fame). This uses a 14inch vector monitor manufactured by TOEI MUSSAN CO LTD of Japan and it requires a new flyback (apparently). I have attached a copy of the schematics of the chassis. Can anybody help me out with this please ? Thanks, Gavin Attached Thumbnails

17th Apr 2013, 10:23 pm	#2
Radio Wrangler Moderator Join Date: Mar 2012 Location: Fife, Scotland, UK. Posts: 22,905	Re: TOEI MUSSAN - Flyback - Vector Monitor You haven't said what's wrong with it yet! The power supplies and the EHT generator are all pretty straightforward. The deflection amplifiers appear to be on three custom ICs, which could be thick-film hybrids... but are going to be a problem if you need replacements. David __________________ Can't afford the volcanic island yet, but the plans for my monorail and the goons' uniforms are done

18th Apr 2013, 1:25 am	#4
Radio Wrangler Moderator Join Date: Mar 2012 Location: Fife, Scotland, UK. Posts: 22,905	Re: TOEI MUSSAN - Flyback - Vector Monitor An open winding? Insulation breakdown? If the EHT section is OK, a re-wind of the rest should be possible. The CRT should be a pretty normal type, but the symmetrical deflection yoke will be unusual.... that said TV parts ought to be adaptable to bias and power the CRT. David __________________ Can't afford the volcanic island yet, but the plans for my monorail and the goons' uniforms are done

18th Apr 2013, 9:45 am	#5
cmjones01 Nonode Join Date: Oct 2008 Location: Warsaw, Poland and Cambridge, UK Posts: 2,681	Re: TOEI MUSSAN - Flyback - Vector Monitor You say 'apparently' it needs a new flyback transformer. How do you know? What are the fault symptoms? We should start with those. Chris __________________ What's going on in the workshop? http://martin-jones.com/