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I triple checked to traces and the four caps C137, C136, C149, and C150, they are fine, no shorts. For what it is worth Tattletech is reporting the existence of the sound manager, but no sound can be heard from the control panel. There is white noise and a soft squeaking sound when using it ...

Too early… I’ve very likely destroyed the DFAC-II. When I powered it up again, it made a nasty screeching sound and showed no sign of activity. I checked the board, and across C136 and C137 I noticed some flux residue that was likely shorting them to ground or across the pads. I cleaned and...

I’ve recapped the logic board. The PSU is fine, the voltage rails are stable, and it works with another LC475. It’s working now, but I still need to wait and run more tests, because one of the two VRAM chips is definitely dead now after running it in here. :( I just hope it’s not killing any...

I've ordered two of them .... it all makes sense to me, thanks

I connected an LC 475 to a High-Resolution Monochrome Monitor MO400, specified for 640×480. https://lowendmac.com/1989/apple-high-resolution-monochrome-monitor/ The monitor produced an image for about 5 seconds, then emitted a loud crackling noise consistent with high-frequency arcing. I...

Yes, it’s the one with the black block and a Molex connector on the end. I read about it here in the forum, where someone mentioned using it. I thought that without an HD and an accelerator, it would be sufficient. The Mean Well RPT-60A is definitely better — for what it worth, it’s also sold...

The battery is "new", meaning a couple of years old, left sitting in a drawer. I will: - use a new button-battery with the silicon insider adapter - do a recal - double test the PSU But the VRAM SIMM are really not working anymore now :( g "I'll be back"

Ok, I got a very nice-looking Performa 475 with a network card, HD, VRAM, RAM — but missing the PSU. I temporarily added a known-good PSU from another LC. The capacitors look fine. I even removed one to check underneath, and it confirmed no visible leakage. A very very nice board! Boot time...

Is this a dead thread? I'm planning to use an HD IDE PSU for a Performa 475. The lack of -5V means I’ll lose LocalTalk support — not a big deal, but not ideal either. My main concern is the power requirements. An HD IDE PSU provides 2A on both +5V and +12V rails. Is that enough for a Performa...

+1

Hi everyone, I have a faulty 2N6394 (Q8) in the Analogue Board of a Mac Plus. Is there an equivalent thyristor I can use? I found 2N6395 sold by Aliexpress, I'm not sure what I will get ... I'm willing to try it, I don't have other options. Is it? thanks

can't a print server connected the Lan use the serial mini din port?

thanks. I found this for €80. Apple Personal Laser Writer FCC ID: BCGM2015 1992 I'll make an offer for €50 is it a good deal? I want to network it

Hi mates, I have an analogue board from a Mac Classic that wasn’t working. There was visible corrosion from a leaking capacitor, but it seemed fairly isolated. I’ve now replaced all the capacitors, and I’m getting a steady 5V and 12V from the Molex connector with the digital board...

Hi mates, I would like to add a retro printer to my collection, possibly an Apple one, laser, without hassle when looking for a new toner and reasonably cheap. Any recommendation?

I have found this ... it was unknown to me

I assume we need a thermal camera.

the pull-down string is at the back. under the upper arm, check it out. There are 3 or 4 tents where you can adjust the pressure on the heads, I was able to recover a couple of drives in this way

I've been using this for a while, the problem I have is that it can not save bookmarks. Also editing text on a web page, like in a search box, is a little cumbersome, but for point and click it's ok

Weird that after the insertion of the disk, the heads do not move back and forth to align with track 0. It's hard to tell, the initialization is a blind process, and the validation checks/reads if it was performed by reading back. I'd check the pressure on the heads, there is a small spring in...