Recent content by keelus

Sadly I don’t have one that’s known good. And from what I have seen, new ones are very expensive. Will try resoldering the flyback joints and see if that helps…

How could I test if the flyback is bad? The resistors and diodes controlling the vertical deflection work as they should.

Would be nice a bit of help 🥲

Hello! I've been working on my Mac Plus for a month and I got this issue out of nowhere. (The diagonal lines are from the camera) As you can see, the display is very compressed vertically, strange display resolution. I tried adjusting the height potentiometer, but it's maxed out, if i turn it...

Hello! A few weeks ago I posted here and i was able to fix all the problems I got (link here). Last week I went and started playing around the floppy drive (i had it appart while fixing the computer itself). Tried inserting a floppy with the 6.8.1 and it just didn't read and couldn't even eject...

Yes! The strange thing is that it's stretched on the top part while being a bit compressed in the bottom. Tried the height adjustment but that doesn't seem to fix it. I played around with a few solder joints and that didn't happened before touching them so, I guess i should resold and clean the...

Hi! Just wanted to update that my mac is now working (althought the floppy reader and the display (it's a bit compressed on the bottom, and displaced to the top) both need to be fixed). Just in case anyone has the same problems as me, what I did so far was: Replace the U3 optocoupler for a...

I've bought some used 4 RAM cards of another mac plus for 8$, will write here if they work or what happens. Will check that guide, thanks for your help 😊

Y cleaned them before, with isopropilic alcohol, the entire board and ram slots, no change. I tried changing their placement in this way: ABCD ram order gave me that error, 020100 DCBA ram order gave me a different error, 028000

I sadly don't have any other ram to swap and test.. What do you mean by reseating it / using some deoxit?

Hello! Yesterday I replaced the U3 optocoupler for a 4N35 chip, which seemed to fix the flup flup + no chime no video issue. Also, I've just recapped every capacitor on the analog board (except C1 and 2 RIFAs). However, there's no change before and after recapping. I've just turned it on, got...

Hello :giggle:! A few weeks ago I posted here asking for help with my Mac Plus. I fixed the error by replacing the U3 Optocoupler with a 4N35. Now, everytime I turn it on, my Mac Plus does the chime sound, gives video, and displays the sad face (althought, sometimes displays a few random lines...

Hello! Finally I found a shop in my country where I could buy almost (not the C1) every capacitor of the analog board, along with the U3 octocoupler! Thanks for your help :giggle:.

Yes, but to ship to spain, It has a base of 20€ shipment plus the capacitors I choose, I think it's pretty expensive :confused:

I understand! So, the capacitance MUST be the same? I cannot find 3.9uF ones.. the closest one are 4.7uF