Not sure how common this is, so I thought I'd share it with the rest of you. It's not just the caps in the PSU that can fail...
blown SMD cap on TT RAM
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markTT
- Posts: 15
- Joined: 17 Oct 2022 19:56
blown SMD cap on TT RAM
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-Mark
One time 520ST, 1040STFM, Mega STE2 owner and now TT.
One time 520ST, 1040STFM, Mega STE2 owner and now TT.
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stephen_usher
- Site sponsor
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- Location: Oxford, UK.
Re: blown SMD cap on TT RAM
That's a tantalum capacitor. Quite normal failure mode.
Those are just normal 30 pin SIPPs so you can just replace that one stick, probably fitting a SIMM socket for future replacability.
P.S. Everyone's right, they're ceramics. I was being put off by their colour.
Those are just normal 30 pin SIPPs so you can just replace that one stick, probably fitting a SIMM socket for future replacability.
P.S. Everyone's right, they're ceramics. I was being put off by their colour.
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.
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exxos
- Site Admin
- Posts: 28363
- Joined: 16 Aug 2017 23:19
- Location: UK
Re: blown SMD cap on TT RAM
They look like ceramics to me ? I've had a few of those fail.
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rubber_jonnie
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- Location: Essex
Re: blown SMD cap on TT RAM
Scorchio.
Collector of many retro things!
800XL and 65XE both with Ultimate1MB,VBXL/XE & PokeyMax, SIDE3, SDrive Max, 2x 1010 cassette, 2x 1050 one with Happy mod, 3x 2600 Jr, 7800 and Lynx II
Approx 20 STs, including a 520 STM, 520 STFMs, 3x Mega ST, MSTE & 2x 32 Mhz boosted STEs
Plus the rest, totalling around 50 machines including a QL, 3x BBC Model B, Electron, Spectrums, ZX81 etc...
800XL and 65XE both with Ultimate1MB,VBXL/XE & PokeyMax, SIDE3, SDrive Max, 2x 1010 cassette, 2x 1050 one with Happy mod, 3x 2600 Jr, 7800 and Lynx II
Approx 20 STs, including a 520 STM, 520 STFMs, 3x Mega ST, MSTE & 2x 32 Mhz boosted STEs
Plus the rest, totalling around 50 machines including a QL, 3x BBC Model B, Electron, Spectrums, ZX81 etc...
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DoG
- Posts: 1298
- Joined: 07 Apr 2018 12:26
Re: blown SMD cap on TT RAM
Looks like normal decoupling caps for each chip to me, so ceramic multilayer non polarized caps.
But if they fail there is a short between VCC and GND so BOOM!
But if they fail there is a short between VCC and GND so BOOM!
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markTT
- Posts: 15
- Joined: 17 Oct 2022 19:56
Re: blown SMD cap on TT RAM
There was a nice black bloom on the inside of the case from the resulting mushroom cloud. Came off quite nicely though with a toothbrush and detergent.
-Mark
One time 520ST, 1040STFM, Mega STE2 owner and now TT.
One time 520ST, 1040STFM, Mega STE2 owner and now TT.
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frank.lukas
- Posts: 812
- Joined: 19 Jan 2018 11:52
Re: blown SMD cap on TT RAM
Original Atari 4MB Fastram cards not use normal Edo or Fastpage Simm modules ...
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