Can I fix this Amiga 4000? Part 3

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The third of a four part series covering the repair of my Amiga 4000 motherboard which suffered lots of corrosion from a leaky battery and capacitors.
Part 1 - • Can I fix this Amiga 4...
Part 2 - • Can I fix this Amiga 4...
#commodore #amiga #repair #electronics

[@GadgetUK164]

Part 1 - kzbin.info/www/bejne/a3XTh2Vme7h8bac Part 2 - kzbin.info/www/bejne/l3O1YqGnaJhpmqM Amiga PCB Explorer - www.amigapcb.org/ A couple of corrections: 1) These shipped with a 2MB Chip RAM SIMM - I said the 8MB original... 2) The memory mod to use 32MB SIMMs, you end up with 112MB I think, not the full 128MB

[@SimonZerafa]

That Joystick Port doesn't give you UP? Sounds like the Rick Astley Paradox 😏

[@GadgetUK164]

🤣

[@TheRus13]

When I worked at Panasonic, some PBX systems used an ionistor instead of clock batteries.When the station is connected to the network, the ionistor is constantly charged.When the power was lost, the settings were maintained from a charged ionistor.I don't remember exactly how long the charge lasted, but it worked quite well as a backup power supply.

[@ChrisEdwardsRestoration]

im not a fan of turn pin sockets anymore... theyre great if your pins are pefect. and you never take them out. excellent work as always

[@GadgetUK164]

Yes, I tend to use them when legs are super short, or when I have turned pins to plug into the socket etc. But as you say, for a 1st use - they work OK! Regular removal and they just become sloppy as the pins wear a little on the chip (they get rounded off more and more each insertion).

[@wheatenclient3623]

nice! Been enjoying you vids for quite sometime. Your style of meticulously remove all the DIPs to clean them really impressed me. I'm sorta person if it works don't fix it. Do ples keep it up the good vibes.

[@FernandoelChachi]

"Primer/Spray" for the metal plate of the joysticks ports?. Just zinc paint would be better I believe.

[@williamsquires3070]

I think I would have just run some 30 ga. wire-wrap wire from the via to the resistor; a lot less fiddly than those really hair-thin PCB traces snaking under the connector. 😊

[@erickvond6825]

Something you can use as a solder mask is SLA 3D printer resin. It cures a lot harder and isn't susceptible to being dissolved by IPA.

[@SimonZerafa]

I wonder if a polarising filter would help on the microscope to help with unwanted reflections? 🤔

[@GadgetUK164]

That's a cool idea! I will give that a go!

[@andrewlittleboy8532]

I suppose you could use a can of cold zinc spray for the metal parts. 👍

[@GadgetUK164]

That's a neat idea!!!

[@MorganJustGames]

I see the Title of the Video, Can I fix it? I automatically think, this is Gadget, of course he can, he can fix anything.

[@GadgetUK164]

Haha =D Thanks Jamie! Your mouse is coming up very soon!

[@JohnGotts]

Patience of a saint.

[@tommyovesen]

Amazing work!

[@williamsquires3070]

I thought the 4000 had a number of Zorro slots like the 3000?

[@GadgetUK164]

It does!

[@retro_noix]

Great effort on the A4000. Impressive! 👍

[@GadgetUK164]

Thanks a lot!

[@router5840]

Great series of videos very interesting 🙂

[@GadgetUK164]

Glad you like them! =D

[@lordflashheart7427]

why are all amiga 4000s broken

[@GadgetUK164]

Battery and capacitor leakage!

[@FernandoelChachi]

Amazing video. I've loved it.

[@GadgetUK164]

Thank you very much!

[@neilobusk]

👍N x