Black Matrix
Well-known member
Old Tech: Space Invaders Motorola XM501 : need caps explained
Hey all,
I have a Space Invaders monitor that I am looking at trying to make right. At the moment, the game just doesn't seem to focus, and the bright is off, it will pulse white at times, cut out sometimes, but will come back up if I power down, its very problematic but it does work. I'm sure it could be a great many things causing the problem: cracked flyback, bad pot, leaking HV somewhere.....
Anyways, I performed the Bob Roberts cap kit on it. No improvement. But I did notice that when either the Bright pot or Contrast pot is turned up and down, the picture would be perfect when it was adjusted just so. And then would the image would dim. Anyways, my friend suggested that I replaced all the other caps that weren't included with the kit. The pots that aren't supposed to go bad.
So I'm looking on digikey to try to source these parts. The manual calls the caps Mtzi Poly and Polyester with a Mylar thrown in for good measure and Lytic.
I pretty much assume Lytic is electrolytic polarized caps as most where the ones in Bobs kit.
When I search for Capacitors on digikey, the choices are:
Aluminum
Arrays
Ceramic
Electric double layer supercaps
Film
Mica and PTFE
Neobium Oxide
Tantulum
Thin Film
Trimmers and Variables
So my question is, what modern day replacement corresponds to these caps used on the old B&W monitors-where should I be looking for these Polyester and Mtzi Poly caps on Digikey. I hope thats not too stupid a question.
And most were Axial (it it helps to know) although radials might fit better since most were mounted upright and bent so both ends were pointing down.
Hey all,
I have a Space Invaders monitor that I am looking at trying to make right. At the moment, the game just doesn't seem to focus, and the bright is off, it will pulse white at times, cut out sometimes, but will come back up if I power down, its very problematic but it does work. I'm sure it could be a great many things causing the problem: cracked flyback, bad pot, leaking HV somewhere.....
Anyways, I performed the Bob Roberts cap kit on it. No improvement. But I did notice that when either the Bright pot or Contrast pot is turned up and down, the picture would be perfect when it was adjusted just so. And then would the image would dim. Anyways, my friend suggested that I replaced all the other caps that weren't included with the kit. The pots that aren't supposed to go bad.
So I'm looking on digikey to try to source these parts. The manual calls the caps Mtzi Poly and Polyester with a Mylar thrown in for good measure and Lytic.
I pretty much assume Lytic is electrolytic polarized caps as most where the ones in Bobs kit.
When I search for Capacitors on digikey, the choices are:
Aluminum
Arrays
Ceramic
Electric double layer supercaps
Film
Mica and PTFE
Neobium Oxide
Tantulum
Thin Film
Trimmers and Variables
So my question is, what modern day replacement corresponds to these caps used on the old B&W monitors-where should I be looking for these Polyester and Mtzi Poly caps on Digikey. I hope thats not too stupid a question.
And most were Axial (it it helps to know) although radials might fit better since most were mounted upright and bent so both ends were pointing down.
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