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#repair

21 posts15 participants2 posts today
Rev. Charles Browning
Public

Happy Saint Patrick’s Day. According to legend he cast out snakes from Ireland. Well I cast out… whatever it was that has kept this NeoGeo Pocket (the greatest handheld console of all time, btw) from working these last, uh, 25 years or so.

So guess who’s playing SNK vs Capcom the rest of the day?

A hand holds a blue Neo Geo Pocket handheld gaming device displaying a game screen with characters and dialogue. In the background, a multimeter and various tools are visible on a table. The setting appears casual, with additional clutter surrounding the gaming console.
#diy#repair#RetroGaming
Carlos Rodrigues 🪣
Public

This same CRT had already underwent surgery on the previous weekend.

It's normally connected to my Mega Drive — which is still PAL (50Hz) and hence didn't trigger any jitter — and the RGB input was very dark.

Other RGB sources with different cables were dark as well. Turns out it was pulling the input signal way down towards ground. Replacing the 82Ω pull-down resistors in the R/G/B lines (while still keeping things under 1V peak-to-peak) did the trick.

The Sharp CRT, with a brighter image after I replaced the pull-down resistors in the R/G/B lines. It's showing "Xeno Crisis" (2019) for the Mega Drive.
Part of the schematic from the Sharp 37DM-23S service manual, showing R414, R417, and R420, which were replaced by 1KΩ resistors.
#electronics#repair#crt
*
Carlos Rodrigues 🪣
Public

OK... so what exactly was wrong with this CRT?

As it's often the case... hard to say. I replaced the main filter capacitor but that wasn't it. Then I replaced a few more capacitors in the low-voltage horizontal drive circuit, but improvements were marginal, if any. I didn't have any 100V+ capacitors so had to stop there.

I'd already messed with the settings in the service menu to no avail but... this time shifting the picture to the left made the jitter go away. 🎉

Why? 🤷‍♂️

Playing "where's waldo" with the board layout schematic, trying to find a particular capacitor's location.
#electronics#repair
Carlos Rodrigues 🪣
Public

This weekend the Cloudflare Lisbon office hosted a 24h hackathon organized by high-schoolers called Scrapyard.

scrapyard.pt

A couple of us volunteers thought it would be nice to also bring a hobby project to work on, so I brought one of my small CRTs that was suffering from significant jitter with 60Hz inputs (e.g. PAL60).

It wasn't as straightforward as replacing the main filter capacitor, but I got it working in the end. 😅

Me looking at the circuit schematic for the Sharp CRT that's visible on my right with its innards splayed open. Repairs involve a lot of head-scratching but, fortunately, back then it was common to have schematics available. On my left there's a NeXTcube and its CRT monitor. Those are not mine, though. But the cube also needed repairs.
Assortment of electronics repair tools. There's a soldering iron (TS101), some pliers and screwdrivers, solder flux, and a Raspberry Pi to test the video input, along with a SNES-like game controller. The CRT TV is visible on the left.
Me adjusting some knobs inside the back of the CRT (G2/screen voltage in the flyback transformer) while looking at the screen. There's a young kid (looking away from the camera) watching over my shoulder. He's probably more interested in "Street Fighter III: 3rd Strike" (1999) that I'm running for testing rather than what I'm doing specifically.
#retrogaming#electronics#repair
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Rev. Charles Browning
Public

@FediFollows @iFixit Awesome! They’ve been a great help in recent years (and I treasure the tool kit I got from them a couple years back). Maybe they can help me with the #repair project I’ve got going on another thread, trying to repair an older Sony 5 disc CD/DVD player that won’t turn on!

iFixit
Public

We. Love. Modular. Ports.

Did you know that MacBooks have modular USB-C ports? All that Thunderbolt speed goes straight through a small press connector. Impressive!

Better yet, if you break a port, your expensive logic board's safe and sound.

Why doesn't every laptop do this?!
—
#repair #electronics #iFixit

MacBook sitting upside down on a white table with its bottom cover removed. Tweezers are holding the MacBook's two left-side USB-C ports slightly above the laptop. The USB-C ports are a discrete PCB with an integrated ribbon cable that terminates in a wide press connector that connects to the logic board.
*
Delta Sierra
Public

Volunteered at our local repair cafe today. I fixed an RC car and an amplifer, and helped diagnose an LED christmas tree.

Couldn't take pictures of the whole space, but here's my little workstation with my tools. There were 8 volunteers and about twice as many visitors, so it wasn't too stressful.

I definitely plan to volunteer again, once the organizer gets the next date picked out!

A pile of diagnostic and repair tools, sitting on a folding table. Included is a multimeter, soldering iron, solder holder, hot glue gun, isopropyl alcohol, and various screwdrivers, tweezers, bits, adhesives, and so on. Some tool boxes and a fabric bag rest on the floor behind the table.
#repair#diy#volunteer
jaseg
Public

Since this is a clear engineering flaw, I called up the manufacturer and after some whining on the phone they were willing to send me a free replacement for the corroded boiler. This one still has some meat left on it, but once it can’t be saved anymore I now have a spare to replace it with. Apparently newer models of this machine use a much more expensive brass part in its place that is compatible with our machine, but I wasn’t willing to fork over 100€ for it.
#repair

jaseg
Public

I did another #repair of our Gaggia Classic espresso machine. The thing is nicely built and works well, but it has a critical engineering flaw: the boiler is made up of two halves, one Aluminium and one stainless steel. The dissimilar metals cause galvanic corrosion of the Aluminium part and it needs to be taken apart and cleaned about once a year. I sanded the partially corroded flange, replaced some corroded screws with stainless steel ones, replaced the flange O-ring and cleaned the thing.

A gaggia classic espresso machine with the top lid of its case taken off. The camera looks into the machines stainless steel sheet metal case, with a mess of wires and tubes visible. The brew group has already been taken out.
The Aluminium top half of the brew group sitting on a sheet of sand paper. The part is made from cast Aluminium, is about the size of a coffee mug, and has a flange with holes for four large screws on its bottom. Two temperature switches and the stainless steel steam valve are affixed to it.
The stainless steel lower half of the brew group that contains the shower assembly. A magnetic valve and a red high temp hose with woven sheath are mounted on it, and a stainless steel siphon tube sticks out from it to where the top half of the boiler would go. It has the mating part for the boiler flange with a groove for a large o ring.
A view into the Aluminium boiler case, showing flange and insides heavily corroded.
anna_lillith 🇺🇦🌱🐖
Public

🧵By #mending a cotton t-shirt instead of replacing it, you could help to save over 7.5kg in #CO2e. That would be equivalent to ironing for over 25 hours.

The days of being told that #repair isn't an important part of a garment's life cycle are gone. I hope this will also lead to a change in the way that repair is perceived in our society; as a skilled and valuable #craft that deserves to be invested in and as a powerful environmental and political act.

🪡🪡🪡

... and if the item can't be repaired, over 3 in 5 of our second hand clothing purchases habe displaced the need to buy new ones. Photo of delicate blue and red mending in strip patterns on black background
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Kimberley
Public

Here’s the popped capacitor, now replaced with the new one and the sewing machine is running again. Did a bonus extra repair today too as the washing machine stopped draining (jammed pump). And while looking for the superglue I found this very relevant patch in the kitchen junk drawer. Very successful day of assessment avoidance.

A black circle embroidered patch with white text reading “Fix shit or cry trying”. There’s also a 3D cube with 3 sides showing the letters LBK.
A small black rectangle with rounded sides just slightly larger than an AA battery. It has a large crack on the top. There are 4 electrical wires coming out of it
#Repair
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Ari [APz] Sovijärvi
Public

Here we go, the first production version of the Who Dunnit's 3D printed reel. In the end, 7 different prototypes were made, zeroing in on the shape and then the transparent material. Naturally also learned about designing stuff with FreeCAD while doing it.

Seen in this video is the 2 part model, where the hub and wheel part are printed separately so no support is needed. Before this I also quickly tried on the one piece version but didn't put decal on it.

In the end I reused the old decal as it came off in good shape and it seems to stay on the reel just fine.

All in all, this was a fun project that taught me a lot. Next I'll probably go back to tackling the modified Road Show project when I have the extra time.

#pinball#3dprinting#freecad
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Kyle Memoir 🍉
Public

Any act of repair a gratifying gesture of refusal and subversion these days. A poke in the eye to corporate waste and consumer lassitude.

Feeling like renegade heating engineer Harry Tuttle (Robert De Niro) of ‘Brazil’ right now, having decided: eff no, not into landfill—not yet.

And how fitting: while finishing up, @pluralistic heard on CBC radio discussing DCA & right-to-repair.

details in #alttext

The internal wiring and heating element of a ‘Master Chef’ coffeemaker (not a bad machine most days) with its bottom cover removed, repair in progress. A blocked cold feed tube down to the horseshoe was the issue, probably my fault for letting something fall into the reservoir—it looked like a bit of cinnamon stick caught at the narrow point. And then broken lines, as they’d grown brittle and broke on disassembly. Note the classic bi-metallic corrosion built into the design (white oxidation where element was affixed to the underside carafe’s hot plate and brown-yellow oxidation stains where bracket clamps element)—total failure still on the way, but thwarted for the moment.
Same photo, feed and hot tubes replaced. Let’s take a sip from the first-run p-test now (production system using ‘live’ coffee vs. test water—not pee!)… Ah, yes… Taste that? Non-compliance is sweet and delicious.
#Stratford#canada#repair
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