joedredd

Hi, thanks to this post I decided to tackle the job myself. I've made a video on YouTube that clearly explains how to service this switch for others. You can see it here: https://youtu.be/VW8Rlx6f8ps

Possibly motor, but for a couple of quid it's worth trying the caps first IMHO.

Thanks, I already have the chips, really don't have any intention to use this machine beyond a few games.

Thanks. So are these just normal caps I need then, not these "Decoupling Capacitors" ? Also I note the resistors are aligned alternately, I assume I carry on the same trend?

Hi, I've bought an Atari 520STF which had a dodgy floppy drive and I've fixed replacing some caps following a thread on this forum. Now I can load the many games that came with it, I notice many of them require 1Mb so it's time to upgrade. I'm not interested in going larger than that and would like to keep the machine original(ish). I'm after advice on what else I need to buy as I'm really very rusty on my electronics. I opened it up and found the attached photos. Looks simple enough, digging around I decided to order 16 x 256kbit chips TMM41256AP-12 which are Toshiba DRAM of the same spec that's on the board already. Rather than solder direct to the board I'm going to order these IC Sockets from Farnell which should be OK rather than soldering direct to the board for obvious reasons. I understand that those brown capcitors are Decoupling Capacitors of 100nf / 0.1uF ? I've no idea what these are - any pointers? Any idea if I also need three 68 Ohm resistors for CAS and RAS signals - R71, R72, R73 (so I've read!) If someone could kindly point me to the relative component on Farnell I'd really really appreciate it, many thanks.

Heh, way ahead of you. I was thinking to get these?http://uk.farnell.com/te-connectivity-amp/1-390261-4/socket-ic-dil-0-3-16way/dp/1101347 Good luck with the processor! Sounds like a fun one.

Even better when it's fixed for £1.31! Next stop - 16 x DRAM chips onto the board.

I recently bought a 520STFM, my first Atari (I've always been an Amiga guy) Unfortunately the floppy drive would not read disks, it would go throughs the motions, spin up, head move, but just boot to TOS. I discovered this thread through a Google search and sent the wife out to Maplns for some caps for £1.31. Swapped them both out on this Sony drive and it now works perfectly. Thanks guys!