Correct pinout for the Floppy SF314 PSU?

[rikala]

Does anyone know which of these are correct? I have a Sf314 with a male psu connector and no psu for it.
One of the topics below suggest only 5V, the other 5V and 12V

http://www.atari-forum.com/viewtopic.ph ... out#p77409

http://www.atari-forum.com/viewtopic.ph ... ut#p154353

/Rikard

[Dal]

Chandler will need to explain this one I think as he has made two posts on the same subject, three years apart with completely different information.... I have to admit, I can't say for sure which is the right advice. People talk about maybe it needs 12v, but apparently the manual from Best doesn't show any sign of 12v. My gut instinct says "Go with the manual", however? I'd probably like to see it first to get an idea of its integrity.

[Chandler]

they are both correct i believe

haven't done 1 of these drives for ages so can't remember too much of hand... but i think the early SF354 (single sided) used the 12v and the later SF314 (small button double sided) only used the 5v BUT you must look on the PCB and trace the tracks to be sure

take a good picture of the top and bottom of the PCB and i will try to help

if you have an early 520ST "black brick" power supply you can use this either by cutting off the plug at the end and soldering on a new plug or,,, i made a cool little converter that just plugs in

[attle]

Time to revive this thread. I have a SF314 drive without PSU, but I have no idea if it's using 12V. Does anyone have an idea?

Also, what kind of current would the drive need? Can I just solder a DIN5 plug to any "wallwart" with the right ratings?

Here's the PCB.

[DrCoolZic]

Yest it does because original drive was using 12v at this time I believe.
Anayway I have the PSU under my eyes and it says:
Input 220V 50Hz 18VA
5V 0.72A
12V 0.21A

made in Singapore


Specifications
+12V ±5%:
60 mA (rest normal)
300 mA (read/write;normal)
850 mA (Maximal)

+5V ±5%:
340 mA (rest mode; normal)
380 mA (read/write; normal)
500 mA (Maximal)

[DrCoolZic]

More info in service manual and users manual of SF354 (more recent version of SF314)
http://info-coach.fr/atari/hardware/fd- ... Manual.pdf
http://info-coach.fr/atari/hardware/fd- ... ual_v2.pdf

[DrCoolZic]

More info in service manual and users manual of SF354 (more recent version of SF314)
http://info-coach.fr/atari/hardware/fd- ... Manual.pdf
http://info-coach.fr/atari/hardware/fd- ... ual_v2.pdf - figure 1-32

[attle]

Thanks DrCoolZic

I will try using a external PSU for hard drives, as soon as I get the DIN5 plug I'll make a molex-DIN adapter and see if the drive works. The PSU is rated 2A so should be plenty for this use.

[DrCoolZic]

Did you check that at least your floppy drive is working?
The drive in my SF314 is very very old full size drive and is definitively broken would not even load a floppy.
Therefore I intend to reuse the control I/F board to connect to an CosmosEx device like this http://www.atari-forum.com/viewtopic.ph ... 30#p258901