Hi there,
I just bought an Atari 1024 Ste. After some usage, a lot of smoke appears near the psu.
I've opened it after some times and every capacitors have leaked.
Is there a reason for that ?
PSU capacitor leakage
PSU capacitor leakage
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520 STf / 1024 STe 4mb RAM
Re: PSU capacitor leakage
If you're referring to the yellow stuff beneath the caps: Thats no leakage, it's some sort of glue, that prevents the parts from oscillating.
Nevertheless, you should rework the power supply, you can find instructions here https://www.exxosforum.co.uk/atari/last/psu/index.htm and parts in exxos shop.
Nevertheless, you should rework the power supply, you can find instructions here https://www.exxosforum.co.uk/atari/last/psu/index.htm and parts in exxos shop.
Ingo
| Atari 1040STE@32MHz | Amiga 1200 (ACA1220) | Atari 800XL (U1MB, SIDE2) | Atari 130XL (Sophia DVI) | C64 (1541 Ultimate II, Rev3 RFMod Replacement) | TI 99/4A (F18A, 32k, FlashROM 99) | Sinclair ZX Spectrum 128 (Stereo, DivMMC) | Amstrad CPC664 (512k, M4 Wifi) | ... |
| Atari 1040STE@32MHz | Amiga 1200 (ACA1220) | Atari 800XL (U1MB, SIDE2) | Atari 130XL (Sophia DVI) | C64 (1541 Ultimate II, Rev3 RFMod Replacement) | TI 99/4A (F18A, 32k, FlashROM 99) | Sinclair ZX Spectrum 128 (Stereo, DivMMC) | Amstrad CPC664 (512k, M4 Wifi) | ... |
Re: PSU capacitor leakage
That's not leakage around the electrolytic caps, but glue!
However, you must -- I repeat: you must -- replace that RIFA X capacitor. Those have next to 100% failure rate and they fail quite spectacularly with fireworks. Be sure to chose a replacement with the same voltage and safety class X.
EDIT: This user did not replace the RIFA cap, either. Looks exploded, like yours: https://abload.de/image.php?img=atari10 ... l4ck5h.jpg
However, you must -- I repeat: you must -- replace that RIFA X capacitor. Those have next to 100% failure rate and they fail quite spectacularly with fireworks. Be sure to chose a replacement with the same voltage and safety class X.
EDIT: This user did not replace the RIFA cap, either. Looks exploded, like yours: https://abload.de/image.php?img=atari10 ... l4ck5h.jpg
Re: PSU capacitor leakage
Electrolytic capacitors seem to be ok, this is definitely not a leak, this is a glue, that holds them in place. Source of a smoke was this 0,1uF X2 film (MPF) capacitor on the primary side.
Re: PSU capacitor leakage
Thanks for all your replies
Ok, so it's not dead. I'll keep it in a safe place until I have some times and tools to repair it.
Ok, so it's not dead. I'll keep it in a safe place until I have some times and tools to repair it.
520 STf / 1024 STe 4mb RAM
Re: PSU capacitor leakage
Just replace that burnt 0,1uF 275VAC X cap made by infamous RIFA (you may even remove it, it will work without it) and it shall be ok. If you decide to replace, remember to use an X (or better X2) class capacitor.
- stephen_usher
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Re: PSU capacitor leakage
Indeed... and don't buy the RIFA ones as they'll die again, eventually.
Intro retro computers since before they were retro...
ZX81->Spectrum->Memotech MTX->Sinclair QL->520STM->BBC Micro->TT030->PCs & Sun Workstations.
Added code to the MiNT kernel (still there the last time I checked) + put together MiNTOS.
Collection now with added Macs, Amigas, Suns and Acorns.
ZX81->Spectrum->Memotech MTX->Sinclair QL->520STM->BBC Micro->TT030->PCs & Sun Workstations.
Added code to the MiNT kernel (still there the last time I checked) + put together MiNTOS.
Collection now with added Macs, Amigas, Suns and Acorns.