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Uh Oh.Electron inbound

Any 8bit repairs, images, cool things, upgrades etc.
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stephen_usher
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Re: Uh Oh.Electron inbound

Post by stephen_usher »

I think that I saw a thread on Stardot with someone with a similar symptom. I can't remember what the solution was though.
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.
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rubber_jonnie
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Re: Uh Oh.Electron inbound

Post by rubber_jonnie »

stephen_usher wrote: Mon Jul 15, 2024 3:23 pm I think that I saw a thread on Stardot with someone with a similar symptom. I can't remember what the solution was though.
Thanks, I'll take a look.

EDIT - I found a 'No Colour' thread, but there was no conclusion. I need to have a poke around the colour encoder circuit, which is IC10, IC14, IC15 & IC16.

RGB output is perfect, so I know it's something to do with that circuit, it may also be worth trying it on UHF to see if that's also affected, though I think it will be.
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...
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rubber_jonnie
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Re: Uh Oh.Electron inbound

Post by rubber_jonnie »

OK, so it's fixed.

IMG20240716105845.jpg
IMG20240716105845.jpg (276.99 KiB) Viewed 1977 times

IC 15 was bad.


IMG20240716105914.jpg
IMG20240716105914.jpg (466.86 KiB) Viewed 1977 times

There have been a few dead IC's on this machine, I wonder if it was overvolted at some point.
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...
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