baritonomarc
Member
Atari Paperboy: replacing a Disco monitor with an Hitachi
Hi all,
I am trying to figure out how to replace my "beyond any doubt" dead med res AGM20M Disco with a "no manual nor info available anywhere" Hitachi GMK-20P monitor.
Having not the manual for the Hitachi, just to avoid to readily burn it, I am assuming that being Japanese it works with 100 V and not 120V like the Disco. The second precautionary assumption is that it probably needs an iso transformer.
Now, the idea is to reduce the 130 V going to the disco monitor (coming from the original Paperboy power supply) to 100 V with a step down transformer I have by hand, so no probs for this.
(image of the 130-100V transformer)
For what concerns the isolation: is the Paperboy transformer an iso or do I
need to place a, third, "big and heavy metal block" iso transformer?
Another point is the possibility to take the 100 V directly from the Paperboy power-block. Reading at the schematics package supplement, page 4 at J3 connector I can see "violet wires 100V" are declared … what it refers to?
Thanks!
Hi all,
I am trying to figure out how to replace my "beyond any doubt" dead med res AGM20M Disco with a "no manual nor info available anywhere" Hitachi GMK-20P monitor.
Having not the manual for the Hitachi, just to avoid to readily burn it, I am assuming that being Japanese it works with 100 V and not 120V like the Disco. The second precautionary assumption is that it probably needs an iso transformer.
Now, the idea is to reduce the 130 V going to the disco monitor (coming from the original Paperboy power supply) to 100 V with a step down transformer I have by hand, so no probs for this.
(image of the 130-100V transformer)
For what concerns the isolation: is the Paperboy transformer an iso or do I
need to place a, third, "big and heavy metal block" iso transformer?
Another point is the possibility to take the 100 V directly from the Paperboy power-block. Reading at the schematics package supplement, page 4 at J3 connector I can see "violet wires 100V" are declared … what it refers to?
Thanks!
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