110 volt to 240 volt

[falen6]

Just a quick question folks.

I have a 110 volt Performa 200. I have recapped the logic board and all is fine.

analog is 110 volt and Im about to change it to 240 volt , for here in Ireland.

As far as I know its just a case of removing the jumper JP1 off the analog board. Thats it down there between the 2 big caps in the picture.

Thats all i do isnt it ?

Its not a nice day when you plug 240 volt into a 110 volt machine........ ive been there !!!

cheers people

 

[falen6]

I just removed CP 13 to see if there is anything written under there - and there is - I have to jump JP2 as well

so remove jp1 , remove top capacitor ( cp13) and jump JP2 ?

 

[falen6]

This is what Ive done

Am I good to plug 240volts into this people ?

 

[mg.man]

I found the attached post a few years back and successfully used it to convert a 220V Classic II to 110V.

Good luck!

 

[falen6]

wow - i was gonna plug it in !!!!

So I have to change out some other caps as well ??? dang !!

i would prob have blown the crap out of it - i definately dont have those caps - will have to order them

is that what you did mg man? did you swap out caps as well as changing the jumpers ?

man , thanks for that reply - i have it all back together , was about to plug it in and test

 

[falen6]

has anyone else done this - 110 to 240
I have looked at some of my other machines that have the same analog board that were shipped as 240 volt machines and they have the same capacitors as the 110 volt version

i dont get it

 

[mg.man]

i would prob have blown the crap out of it

Probably not. Those two 10nF caps (CP19 & CP38) on the 220V (240V according to the .txt) are safety caps. The board will likely work without them but its not advisable since you're running the higher input voltage. Also note the voltage rating on CP1 (and CP13 if you have an early A/B). Again, it'll probably be fine with a 250V part, but better to uprate.

is that what you did mg man?

I went the other way - I changed an EU A/B to US spec/voltage. Worked fine.

 

[falen6]

Thanks MG.Man - ill give it a shot .......

 

[falen6]

ordered up the caps

 

[falen6]

while waiting on the parts i found a dead classic in the attic and took the parts from that machines analog board - happy to say the conversion to 240 volt is a success

I had to adjust the little trim pot in the center of the analog to get the volts up a bit - they are now at 4.9 and 12.3

performa 200 running good

but then it didnt boot at all

then the drive wouldnt spin up

checked all the voltages and they seem bang on

tried a normal classic 2 board in it and it works fine

got the hard drive and gave it a few 'flicks' in my wrist to force the platter to spin - plugged it in and the drive works again


i left the hard drive connected to the machine spinning away to help free it up and with the logic board out i went over it 1 last time
before final reassembly

decided to reseat the 2 roms

put the 2 of them back in , IN THE BLOODY WRONG POSITION ( 1 PIN TO THE RIGHT )

powered it all up and no chime

took out the logic board and quickly noticed the VERY HOT rom's in the wrong dam position


put them in correctly and no chime

have i killed the 2 roms ?

is it possible to burn 2 images on to programable chips !!!


i tried the 2 roms from the classic 2 and they wouldnt give a chime either

im in such a bad humour at this stage i feel like throwing the machine , or myself out the window

 

[croissantking]

Take it easy - you’ll get it fixed. Maybe step away and take a break from it for a day or two

The hobby is like this at times. I’ve been so frustrated with my Bolle SE/30 builds as I’ve dedicated countless hours (and money) into them and try as I might I cant get any of the three I’ve made to work perfectly. So I definitely understand the frustrations these old computers bring. I’ve turned my attention to other things just because I was getting depressed with it, but I’ll come back to it again with a fresh energy in a little bit.

As to the ROMs, it is possible you’ve damaged the chips but I’m sure someone on here will help you get some new ones sorted? I am planning to get a programmer and some 28C64 chips to make my own SE/30 Video ROMs, so I may even be able to help you?

 

[falen6]

cheers croissantking - this machine , I have been at it for some time - recapped it 2 years ago - stupidly hit off 2 of the caps doing something else , tore off some pads - put it back in attic for a while to calm down - took it down last week , fiked the broken pad damage and decided to convert the analog to 240 volt , took my time - waited , got some parts , did it , it worked....... the dam machine was working jut a few hours ago - i had declared the machine 100% - put the rear cover back on , screwed it all up , and the dam thing would post / chime ........ you know the rest


i have one of those programmers - i downloaded the image for the performa rom - but it is 1 file and the machine has 2 rom chips - i dont even know if you can get programable chips the same size as the roms.......


its just been one of those day s.............. im throwing every dam old computer i see back into the attic ........ have a go next year !!!!

 

[croissantking]

Compatible eeprom for Classic II ROM replacement

Hi everyone I wish to know if it possible to use some eeproms to replace my Macintosh Classic II 2 x ROM chip. I connected one of thoses in a bad position and not the macintosh just do not see any scsi device... and i get stuck on the disk icon with a ? mark who make me think that my rom are...

68kmla.org

This might be helpful?

 

[falen6]

thanks for that crioss - i guess i can put the roms in my programmer and see if theres anything left in them

and with that link you gave i now know the kind of chips ill have to order if i fried the roms .......

cheers man