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Atari Touchpad - Will it work again?

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rubber_jonnie
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Atari Touchpad - Will it work again?

Post by rubber_jonnie »

I managed to pick this up on eBay very cheaply:

PXL_20260917_155726145.jpg
PXL_20260917_155726145.jpg (377.02 KiB) Viewed 26 times

Including postage I think all told it was under a fiver. The stylus is missing, however that's not the end of the world as it is simply a plastic stick with a switch in it, so it could be replicated with not too much trouble. For now I can use the one from my other touchpad.

The main issue is the drawing surface. This is my working tablet and you can see that it has a black plastic surface with a red boundary outside which the stylus doesn't function:

PXL_20260918_075217886.jpg
PXL_20260918_075217886.jpg (329.96 KiB) Viewed 26 times

And you can see that this has been damaged on our restoration subject:

PXL_20260918_075326700.jpg
PXL_20260918_075326700.jpg (232.41 KiB) Viewed 26 times

And zooming in to the surface below the damage we see this on the digitiser:

PXL_20260918_075356702.jpg
PXL_20260918_075356702.jpg (113.69 KiB) Viewed 26 times

Having done some testing (Without the black and red sheet, which is just a hard wearing surface to draw on) the digitiser works, but the issue is the ding which is causing a false press at that location. What that does is hold the cursor there, and whilst movement is working, its restricted by that false press.

What I found is that using a bit of tape I could lift that area up and the digitiser would then work properly again with a full range of movement.

It doesn't appear to be anything electrical, just a thin mylar sheet, so my hope is I can lift and un-ding it and if not fit a replacement mylar sheet.

So I need to take a closer look at the digitiser to see whats what and how I need to move forwards.

As for the damaged shiny black layer, that might be able to be replaced by black mylar sheet too, and whilst it is foil backed, again there is no electical connection so it makes me wonder if it's just more FCC interference shenanigans since the digitiser works without it just fine.

I'm pretty sure this can be made to work fully again.

As for the silver label, that's another story...
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: Atari Touchpad - Will it work again?

Post by rubber_jonnie »

So I'll need to tread carefully, the top mylar sheet is actually part of the circuit, it's carbon coated so whatever I do needs to preserve that.

It's going to be tricky.
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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HigashiJun
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Location: Tokyo

Re: Atari Touchpad - Will it work again?

Post by HigashiJun »

:crossed1:
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rubber_jonnie
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Re: Atari Touchpad - Will it work again?

Post by rubber_jonnie »

Good news, the digitiser is now working!!!

I set my hot air wand to 130C 20% flow and heated gently until the top mylar popped out slightly and then clamped with a sheet of thin brass.

PXL_20260918_124453065.jpg
PXL_20260918_124453065.jpg (265.78 KiB) Not viewed yet

I waited for it to cool down and whilst the gouge is still there, and always will be, the mylar has recovered enough that it no longer makes contact permanently:

PXL_20260918_125329987.jpg
PXL_20260918_125329987.jpg (191.34 KiB) Not viewed yet

So next up I need to have a look at the damage to the black top sheet, which is quite badly ripped. Might need to replace it but that at least doesn't seem electrically involved.
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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