Recent content by Nev

I have an International Analogue board for the Classic II that I have had a lot of trouble-shooting problems with. I had noticed a spark around the switch when it is turned on. To get a good look at the area, I had to remove the steel chassis that wraps around the Analogue board. There was sum...

Thanks for the schematic. I had the Classic schematic, but not the Classic 2. I pulled out the flyback and inspected it and there is no sign of any heat damage. I'll work my way through the board and see if I can find any shorts or other issues.

Hi Iron, I have recapped the board and gone overboard and replaced all the caps, not just the usual suspects. I figure the problem is elsewhere on the board and not with the resistor itself.

I've now had two Mac Classic analogue board (updated version - 240v) where the 220 ohm resistor RL1 which is right next to the flyback transformer has started smoking and burning out. I haven't read about anyone else having this problem, but it's happened to me twice. Has anyone had this issue...

Hi, I'm trying to bring a dead 128k back to life. By swapping out components I've narrowed the problem down to the logic board which is now recapped and waiting for a new Egret chip. Apart from another 128k logic board, does anyone know where I can find one ?

Thanks, I removed, cleaned and re-soldered the Egret chip on both boards. Both still act exactly the same as before. It's a process of elimination and that's another one I can tick off.

Thanks, now for the fun task of trying to track one down. They appear to be Apple specific.

Thanks, I've pulled out and put back in the RAM a couple of times and have two sets of RAM so I could try both. As you suggest I'll have to start going though other components one by one until it works. I had a couple of spare TDA4605's so replaced those but no luck. I think diodes and...

I am determined to build a working LC575 out of all the pieces I have. What do I have ? 2x CRT's and bodies incl HDD's, 2x Logic Boards, 3x Analogue Boards. I have recapped both Logic Boards, one of the Analogue Boards (big job) and ultrasonic cleaned with Isopropyl Alcohol rinse of all boards...

You just can't ship LC575's. You barely need to touch these cases and they break.