LaserJet II, IID, III, IIID, Apple LaserWriter II and about 300 others This post is a brain dump on a printer that I have repaired hundreds of times. It may have some minor errors and will not be comprehensive. I will add images within the next week or so. Error 50 was, by far, the…
If you experience an Error 52 on early HP LaserJet printers such as the LaserJet II or III (Canon SX engine) it is usually caused by a scanner malfunction. This can also be caused by a problem with the DC controller. On a LaserJet IIp or IIIp (Canon LX engine) this is usually caused by…
Commodore was pretty inconsistent in their service documentation. Referred to as Service Manuals or technical specifications, they were often just a set of schematics. This page will include any official documentation that I feel includes important service information so some users manuals may be found here. Be aware that some Commodore Service Manuals have the…
The video is in production but I wanted to get the information for pin assignments out ASAP. I will be adding to this post as more information is available Common Pin Assignment Confusion When making cables, for the bench power supply or otherwise, there are a couple things you need to keep in mind. The…
The build video above covers the build process better than I can ever do in text so you should watch it at least once before building this. The purpose of this post is to provide a list of steps that you can review as you go as well as some background on why I do…
Now that the requirements have been determined, and a prototype design is complete, it’s time to source the parts to build this Universal Commodore Bench Power Supply. I wasted a lot of time (and money) sourcing parts that I ended up not using. This post will explain what I decided to use and why. Item…
Update Jan 11, 2022 – The build video has been released on YouTube and a new post on the build is available Power Requirements I started by cataloging all the Commodore machines that have an external power brick… At least as many as I could think of but I keep finding more to add. From…
Update March 2020: Added video near end from a recent repair and some upgrades done to this machine. The Apple Macintosh SE/30 was the fastest all-in-one Black & White compact Mac ever sold. Introduced in 1989, it is a very cool little system with big system features. I was lucky enough to find a pair…
The Osborne Executive is one of the earliest portable computers and the one that, due to excessive pre-release information, contributed to the demise of Osborne Computer Corporation. It’s not usual to look at a vintage computer system that defines business terminology. The Osborne Effect describes a circumstance where a company releases too much information, too…
Update 05-10-21: I will be releasing a video comparing the HDMI converter used in this video with the RetroTINK 2X Pro recommended by so many of you. In the meantime, I want people to be aware that they have other options. The HDMI converter works fine for me but you are displaying a 240p display…
