MTC 9000 problems (I know, classic thread:))

[AE35]

Hey all!

My Hanty 250 PS went out leaving my MTC 9000 unpowered

If I could get away with using the Hanty PS again, I would be happy. So, I'm thinking:
The monitor has 220V for degauss and 128V for the picture(as seen in an earlier
grantspain post)

I have a stepdown converter right here, so how about I just give that baby 110V?
(and...what of the four pins on the chassis are degauss and chassis-power?)

Thanks!!

(Grantspain, I'll have the answer to the Daytona PCB soon!! sorry for being late)

[grantspain]

your hantarex psu should still supply the ac voltages for the monitor,you could just install a standard switch mode for the game board dc voltages

if you decide to take a look at your psu then be aware these babies hold a big charge on the caps and pack a real punch---be careful

don't worry about the daytona boards as i have now got a replacement

you could use a 110v transformer if you want,use the 110v output for the 128vac chassis input and then just attach the degauss to the input of the transformer

mtc9000 schem
http://www.freeinfosociety.com/electronics/schemview.php?id=2245

[AE35]

Thanks!

The PSU is dead, no light in the diode or anything. I've decided against original
PCB and have gone the emu way. And I like Chase HQ better than SCI anyway.

Ok, I'll try the stepdown...and hope that the 110V is enough.

Thanks!

[grantspain]

we used 120v transformer back in olden times when i built cabs and it worked fine-110v should do the trick

[AE35]

Cool, thanks!

I've looked at the schematic, and I think that the two to the right at the cc mark
would be 128v, and 220v to the left on this picture, yes?:



Thanks!

[grantspain]

i do not remember tbh but if you use the schematics and a multimeter you will find pin 1 meters to fuse 1 so therefore pins 1 and 2 are for 128vac----3 and 4   230v ac