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3D printed a TPU blade. Held on using aluminum tape on one side. I installed it and manually rotated the drum to see what would happen. First the positives: it's not marring or scratching the drum in any way, the TPU is soft, flexible, and rubbery in feel. Very much like silicone. And given...

Well, opened up the NOS toner cartridge to take some measurements on the silicone wiper blade. But there's nothing left of the blade... :( All the orange particles above are what remains of the wiper blade. It had basically disintegrated... not sure why it's orange in color. This was a...

Glad you figured it out!

Finished cosmetics on my Laserwriter IIf. Refinished exterior to Satin Stone Gray like my other Macs. Internally it's been completely recapped, has a new main rubber roller and separation pad. Also got a donor fuser from a parts Laserwriter IInt. The print out is ok... still a little dirty...

Ok, let me know. Sounds very similar to what I've been dealing with where it feeds an inch or two and then gives up and lights the paper jam LED. In my case, it happens sometimes when I insert the paper cartridge. When it stops working, it will always stop working until I remove the cartridge...

There are two solenoids attached to a PCB mounted to the power supply. There is a pad on each of them that is there to prevent noise but over time these pads get gummy and bind to the metal contact (attached to the spring). Mine didn't have this issue but I read about it. The solenoids control...

... RTFM moment for me ... I thought the numerical switch on the rear was a SCSI ID, it's actually more like a profile indicator with 0-4 being prebuilt settings for localtalk. It was set to 6. Changed it to 0 and it works great now. 😅

Hope it helps you! Two more observations... My feed issue isn't a weight/capacity issue. Was trying to figure out why the feed fails with more paper and after a lot more testing, the amount of paper was just coincidental. Something is not quite right with how the paper cassette is going into...

Cool! Let me know how it goes. It's tough because it looks like all the sources for blades is now exhausted. I've tried the various vendors mentioned in the threads here and they are all discontinued/out-of-stock. Also searched via Google and ChatGPT, all discontinued. Similar issue with...

My turn at trying to get one of these Laserwriter II printers up and running. I received a relatively good looking Laserwriter IIf earlier this year (@techstep picked it up for me from an e-cycler). I ended up going back to that e-cycler the following week and picking up a banged up Laserwriter...

Quadra 950 Power Supply - context: the secondary side of my stock PSU was dead so I opted to go with an ATX conversion of a Corsair HX1200 PSU which provides 30A on the 5V rail AND has independent voltage regulation of 12V, 5V, -12V so that you don't have to resort to the issues in previous ATX...

Poor man's DB15 to 13W3 cable. :) 3D printed a cover for the connector and filled it with hot glue to ensure it's solid and the internal wiring doesn't fall apart.

Actually, PWR_OK won't work... it comes up after all lines stabilize and that will just result in the 12V being late now. I'll just gate the 12V with the 5V, that should do it I think.

RE: The Quadra 950 speaker pop issue... Here's the output from my oscilloscope. Yellow = 12V rail, Pink = 5V rail, Blue = -12V rail. First the stock apple power supply. Essentially all three rails start around the same time. And the following is the Corsair HX1200 ATX PSU: The 12V rail...

Picked up an Apple Portrait Display from @nickpunt a little while back. It wasn't able to produce anything meaningful on the screen and I suspected it was the RasterOps cable being used as beeping out the pins showed it wasn't wired like Apple's official DB15/13W3 pinout. I wasn't about to pay...

It was the cable. Made my own cable and the display is working.

Weird.. if I power the -12V line ahead of time before the main PSU kicks in, the speaker pop volume drops to match the stock PSU. Doesn't change the behavior of that LED on the ROM SIMM however. Must be a timing thing. Need to check for any delays on the three rails for each PSU with a scope...

I borrowed a Quadra 950 stock power supply from @techstep. With that stock unit, there's still a pop but it's much lower in volume compared to what I hear with the ATX converted power supply. Voltages on the stock unit: ~5.1V/~12.3V/~-12.1V. Voltages on the ATX unit: ~5.05V/~12.1V/~-12.3V. Seems...

I was watching a video of a Quadra 950 boot and it doesn't have the loud speaker pop on boot. So not sure what's going on. Need to disassemble it and debug as it's just bothering me at this point :) I believe @Bolle mentioned the units he had were doing the same thing so there must be something...

Indeed I did. Found a PSU putting out 30A on 5V so went with a conversion and it works great. My stock PSU had power on the primary side but was completely dead on the secondary side. I think the transformer died. Rather than debugging, I saw a Corsair HX1200 for sale used at $50US so I went...