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My IIfx progress

I thought I'd start a thread about my IIfx as it's gonna take a while to fix with lots of photos.
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Today I repaired a few vias under one of the batteries.
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Awesome :)

What's your process? I tend to visually search for damage, repair, then test for continuity... then once I've fixed everything I don't like the look of, power on and see if there is anything still not working.

Then I flail about like an octopus out of water until I happen upon a solution. Based on guesswork, intuition and brow furrowing.

It is time consuming, but it works eventually by sheer bloody-mindedness.

Not having an oscilloscope is a bit of a frustration.
 
Yep same process here too..visual stuff first.Then deductive reasoning.. 😃 what Ive got left.. if any 😂

I'm taking my time cos it's a IIfx.
 
Yep same process here too..visual stuff first.Then deductive reasoning.. 😃 what Ive got left.. if any 😂

I'm taking my time cos it's a IIfx.
I've never even used an fx, they're quite a monster.

I need to get back to my IIx sometime, I got it running after it arrived battery bombed, but it has gained intermittent video. Once I have it stable again and put metal clip RAM sockets in it, I plan to solder in a CPU socket so I can use a socket processor accelerator.

I have a 33MHz upgrade meant for a IIvi waiting for it. That's my poor-man's fx plan. Sadly without the quirky hardware.
 
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Really nice job on the repairs. Mine had a capacitor blow followed by the main 5v (or was it 12v?) trace turn bright red then curl up like one of those cheap firecrackers. Replaced all the caps and ran a nice thick bodge wire to fix the destroyed trace, and it's been functional ever since.

Edit: Speaking of capacitors, while you're at it, I'd recommend a 25v capacitor for C1. That one likes to blow and leave a little crater. I'm convinced it's under rated, and when the cap become even just barely underperforming, it'll blow.
 
Good tip with the caps.. was thinking of fitting 25v caps to be sure. Today I got the shielding out.. that was a job n arf 😦instasquare.photoeditor.effect.cutout_2023419152238605.png
 
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