Search found 5 matches

by ors0n
Thu Aug 03, 2017 12:03 am
Forum: Guides
Topic: psu.why & how to replace the dreaded capacitors in ATARI ST!
Replies: 55
Views: 79297

Re: psu.why & how to replace the dreaded capacitors in ATARI ST!

Thanks for the replies I didn't know that general purpose series of capacitors can be used in switched-mode power supply. I currently own Rubycon PK series (http://www.rubycon.co.jp/en/catalog/e_pdfs/aluminum/e_PK.pdf) and I wonder if this is a good idea to use them instead of Jamicon or buy a new o...
by ors0n
Wed Aug 02, 2017 12:37 am
Forum: Guides
Topic: psu.why & how to replace the dreaded capacitors in ATARI ST!
Replies: 55
Views: 79297

Re: psu.why & how to replace the dreaded capacitors in ATARI ST!

Hi
I'm going to recap my Mitsumi sr98 PSU from 520 STFM. After disassembly, I saw that capacitors are Jamicon SK series (not low-ESR http://yustaltd.ru/wp-content/uploads/2015/05/SK.pdf). I'm wondering, why Atari used that series of caps. What do You think about it?
by ors0n
Thu Apr 27, 2017 10:18 am
Forum: Hardware
Topic: My floppy drive can't read on my Atari 520STFM, but works fine on PC
Replies: 5
Views: 1995

Re: My floppy drive can't read on my Atari 520STFM, but works fine on PC

Lynxman wrote:If the drive works on a PC, the trouble may be caused by the 7406. I exchanged this IC on some Ataris with floppy drive trouble and almost it fixed the problem.
Thanks for advice. I think, first i will recap PSU. If problem will still exist, I will try exchange 7406.
by ors0n
Thu Apr 27, 2017 10:04 am
Forum: Hardware
Topic: My floppy drive can't read on my Atari 520STFM, but works fine on PC
Replies: 5
Views: 1995

Re: My floppy drive can't read on my Atari 520STFM, but works fine on PC

Maeke wrote:did you recap (or change) your psu? It's the first step in troubleshooting.
Thanks for your reply. No i didn't yet. I was hoping that it will not be necessary. I will start from that.
by ors0n
Tue Apr 25, 2017 11:56 am
Forum: Hardware
Topic: My floppy drive can't read on my Atari 520STFM, but works fine on PC
Replies: 5
Views: 1995

My floppy drive can't read on my Atari 520STFM, but works fine on PC

This is my first post here so I would like to say hello Internal floppy in my Atari ST 520 STFM worked fine until now. When floppy try to read, heads moves several times forward about 2 millimeters and than back to starting position (watch here https://youtu.be/HcU7EWwd-F8 ). I checked floppy drive ...

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