Search found 65 matches

by Pacman
Sat Oct 21, 2017 11:44 pm
Forum: PSU (power supplies)
Topic: Arcing in Mega STe PSU
Replies: 27
Views: 9140

Re: Arcing in Mega STe PSU

Hello Pacman, Please don't overdo. Just trying to be on the safe side ;) Household currents aren't to be played around with. Yes, AC-Live voltage can be dangerous. That's why you need to have the ground wire connected. (Yellow/Green) And than it's no problem. Unfortunately not all AC wall-sockets a...
by Pacman
Sat Oct 21, 2017 11:12 pm
Forum: TWEAKS & FIXES
Topic: SR98 PSU GETS MORE LOVE
Replies: 7
Views: 4073

Re: SR98 PSU GETS MORE LOVE

Having completed recapping my Mega STe PSU (and documenting the process ) I'm preparing to recap my STe PSU (SR98). I've bought Exxos' SR98 recapping kit for that and also his PSU dummy load resistor kit (which I've already used when testing my Mega STe PSU without attaching it to the computer, thus...
by Pacman
Sat Oct 21, 2017 1:44 pm
Forum: PSU (power supplies)
Topic: How to: recapping the Mega STe power supply
Replies: 68
Views: 20986

Re: How to: recapping the Mega STe power supply

I wish I had a postman like that :lol:
Well, sometimes I do :D
by Pacman
Sat Oct 21, 2017 1:42 pm
Forum: FLOPPY DRIVES KITS & UPGRADES
Topic: Choosing between three Sony MPF-920 drives
Replies: 35
Views: 15187

Re: Choosing between three Sony MPF-920 drives

I've tried your Media check program but didn't quite understand how to use it (yes, I've read the docs on the above page). Do you insert/remove floppy disks and see what the message is or does it simply "analyse" the drive once to determine the type of disk detect mechanism used? Also I could never ...
by Pacman
Sat Oct 21, 2017 12:37 pm
Forum: FLOPPY DRIVES KITS & UPGRADES
Topic: Choosing between three Sony MPF-920 drives
Replies: 35
Views: 15187

Re: Choosing between three Sony MPF-920 drives

I've taken a closer look at the CTIN switch of my Sony MPF-920E E/131 First, removing the wire across the two pins (i.e. like it was from the factory): Now, the topmost pin (closest to the insertion end of the floppy) is permanently connected to GND (as you can see from the PCB ground-plane). The bo...
by Pacman
Sat Oct 21, 2017 11:29 am
Forum: PSU (power supplies)
Topic: Arcing in Mega STe PSU
Replies: 27
Views: 9140

Re: Arcing in Mega STe PSU

Usually a manual switch produces sparks and voltage spikes when opening or closing the current. My guess would be, that this spike uses the lower solder point as an electrode and arcs to the chassis. Really? So AC household voltages actually go through the metal shielding of the PSU (and also the G...
by Pacman
Thu Oct 19, 2017 10:34 pm
Forum: PSU (power supplies)
Topic: Arcing in Mega STe PSU
Replies: 27
Views: 9140

Re: Arcing in Mega STe PSU

I don't know. There wasn't one on mine (I bought the computer 2nd hand so I can't say if there ever was one to begin with). Are you saying the arcing is a common thing and not a fault? I have some transparent plastic overhead sheets -perhaps I could use one or two of those layered, or are we talking...
by Pacman
Thu Oct 19, 2017 9:00 pm
Forum: PSU (power supplies)
Topic: Arcing in Mega STe PSU
Replies: 27
Views: 9140

Arcing in Mega STe PSU

Having just recapped my Mega STe power supply successfully ( I wrote a "how to" here ) I noticed some electrical arcing spots right underneath where the AC household current enters the PSU circuit board. 20170929-145140_IMG_7810.jpg 20170929-145218_IMG_7814.jpg What might be the cause of this? Loose...
by Pacman
Thu Oct 19, 2017 4:09 pm
Forum: PSU (power supplies)
Topic: How to: recapping the Mega STe power supply
Replies: 68
Views: 20986

Re: How to: recapping the Mega STe power supply

Although a bit over my head I vaguely understand what you're saying: that components interact with each other.
I suggest you contact Czietz and ask about the details.
by Pacman
Thu Oct 19, 2017 2:16 pm
Forum: PSU (power supplies)
Topic: How to: recapping the Mega STe power supply
Replies: 68
Views: 20986

Re: How to: recapping the Mega STe power supply

I read about it here.
Apparently recapping didn't make a difference in this respect, but replacing mentioned part did.
What does that opto-isolator even do?

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