Atari 520ST Power Brick PSU

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Icky
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Atari 520ST Power Brick PSU

Post by Icky » Thu Mar 01, 2018 4:00 pm

Finally I got my hands on an Atari 520ST power brick. A rather large piece of plastic.

I now have a new project for this weekend to clean up and pop it open to see what is inside and if it can be re-capped. Will add new pics as I open it up.

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Icky
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Re: Atari 520ST Power Brick PSU

Post by Icky » Sat Mar 03, 2018 2:40 pm

Well I managed to pop the brick open by carefully putting a knife down the seam to break the old glue.

Its a NORTEL PNE-5

I did not expect to see this when I opened it up.

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A load of epoxy resin around the transformer and it looks like the epoxy has stuck two of the fine wires from the transformer together (second and third wire down) see pic below:

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Icky
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Re: Atari 520ST Power Brick PSU

Post by Icky » Sat Mar 03, 2018 11:06 pm

Pictures of the component side of the PSU board. Haven't started to clean it up yet so its a bit dusty.

Look like its only 5 re-caps
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exxos
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Re: Atari 520ST Power Brick PSU

Post by exxos » Sun Mar 04, 2018 10:15 pm

Nice! Whats the 8pin chip number ?
4MB STFM 1.44 FD- VELOCE+ 020 STE - 4MB STE 32MHz - STFM 16MHz - STM - MEGA ST - Falcon 030 CT60 - Atari 2600 - Atari 7800 - Gigafile - SD Floppy Emulator - PeST - HxC - CosmosEx - Ultrasatan - various clutter

https://www.exxoshost.co.uk/atari/ All my hardware guides - mods - games - STOS
https://www.exxoshost.co.uk/atari/last/storenew/ - All my hardware mods for sale - Please help support by making a purchase.

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Icky
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Re: Atari 520ST Power Brick PSU

Post by Icky » Sun Mar 04, 2018 10:55 pm

exxos wrote:
Sun Mar 04, 2018 10:15 pm
Nice! Whats the 8pin chip number ?
Chip is NE5561N
Caps are 2x 470uF 25V and 3x 4700uF 16V

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Re: Atari 520ST Power Brick PSU

Post by exxos » Sun Mar 04, 2018 11:02 pm

Can't seem to find a schematic for it anywhere ?
4MB STFM 1.44 FD- VELOCE+ 020 STE - 4MB STE 32MHz - STFM 16MHz - STM - MEGA ST - Falcon 030 CT60 - Atari 2600 - Atari 7800 - Gigafile - SD Floppy Emulator - PeST - HxC - CosmosEx - Ultrasatan - various clutter

https://www.exxoshost.co.uk/atari/ All my hardware guides - mods - games - STOS
https://www.exxoshost.co.uk/atari/last/storenew/ - All my hardware mods for sale - Please help support by making a purchase.

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Icky
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Location: UK

Re: Atari 520ST Power Brick PSU

Post by Icky » Sun Mar 04, 2018 11:24 pm

exxos wrote:
Sun Mar 04, 2018 11:02 pm
Can't seem to find a schematic for it anywhere ?
Indeed I too had a look around. I guess whilst I clean it up I'll draw out the schematic - its no bother. I'm interested to find out how its configured.

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