Monday, December 09, 2019

Amiga 2000 Fixes

A common troubleshooting on technique on Amiga 2000 boards, at least for Rev 6.x for non-moving mouse is that the mouse won't move but the buttons still work.

The problem with that is you need an original mouse to use that technique.

If you have a micro controller or other adapter and a PS/2 or USB PC mouse then the buttons also won't work.

Why?

When F1 (Fuse 1 on the motherboard) blows, it disables the 5V line on the joystick ports. This is why your optical mouse no longer lights up, and the micro controller is recieving no power, therefore it can't send a 'click' that the Amiga see.

What you need is a 4 Amp pico fuse. These are very fast acting. They aren't expensive and you don't even have to remove the board to replace it. It blows open, so you can solder the new fuse in parallel with the old, or just clip the leads close to the fuse body and solder the new one to those leads. I'm considering adding a header pin set here and putting the fuse in some sort of jumper block. But that's another post.

Click here for 10 fuses for under $9. https://amzn.to/2DYUU1z This is what I got. I get a small commission.


No comments:

 
Google Find us on Google+ Website: www.circlephone.com