As promised in my previous post this post will go in-depth on the internals of the T1600 PSU.Most of my work was done using the FIVPS2 revision of the board but most of it applies to the FIVPS3 and FIVPS4 revisions as well. There are only minor changes, a couple of the dual capacitors (the …
In the previous part on the Toshiba T1600 Power supply board I talked about how I traced the board and identified some of the mistery components on it. I also showed my repair efforts on the T1600/40’s PSU and how it required minimal effort to fix. As stated at the end of the previous part, …
In my last post about the Toshiba T1600 I took a first look at the machine and explained my first troubleshooting steps towards fixing the power supply (PSU) board.This post will go a bit further in-depth on the PSU, in on of the next posts I’ll explain a bit on how it works. This series …
And more PSU debugging Back in October I acquired a Toshiba T1600 for very little money.It didn’t look all that great from the advertisers pictures and was, as most of these late 80’s/early 90’s Toshiba laptops, sold as not working but I thought I’d take my chances with it.I really like the funky nature of …
My intention to post weekly updates about the T1000LE PSU debugging hasn’t really worked out as “real life” got in the way a bit. Nevertheless, here is another, hopefully last update about the PSU as I’ve managed to repair all three machines. As I mentioned in my last post about these machine I started debugging, …
Today’s post is about debugging the T1000LE machines, specifically their power supplies.As I had to wait for some stuff to arrive for my mouldy Commodore 64 I had some time to dig deeper into the mystery that is the T1000LE’s PSU circuitry.And I went in, deep. I also posted to the Vintage Computer Federation forums …
Last weekend I picked up a boxed Commodore 64, including (boxed) 1541 diskdrive, datasette and “The Arcade joystick” as well as a (non-boxed) printer. The video below is part 1 in my mini-series on this machine.Part 2 will become available next week so be sure to subscribe and join me while we fix up and …
IDE drives, also known as PATA drives are a dying breed.Being superseded by SATA and M.2 this long-standing standard for hard drive interfaces has been discontinued for years now. This poses a problem for vintage computer enthusiasts like myself as these drives are no longer being manufactured and the existing ones are starting to show …
After my post yesterday I did some further testing on both machines.My suspicions were confirmed by desoldering and testing Q502, it was shorted out on both machines. Stranger things As this 2SJ182 is a Power MOSFET capable of handling -600V drain-to-source, 15V gate-to-source and around 1 amp of peak current (as shown in the datasheet) something …
As anyone familiar with these older battery-powered Toshiba laptops knows, these things are finicky at best when it comes to their power supplies. Especially electrolytic capacitors and, apparently, MOSFETS are a problem. The good A year-and-a-half ago I posted about my T1000LE and that it was back to life.That, as it turns out, was a …