Seen a few mentions of this recently, definitely something I'll need to investigate in due course.
The capacitors I'd been waiting on for the T5200 arrived, so these were evicted from the HT supply.
Getting the wiring loom crammed back into the correct routing through the hinge so I could get the cover back on this compartment was an absolute nightmare...
We got there in the end though.
On test, looks good...
...For about five minutes. Then started fading out exactly like it did before. Bother.
I made an absolute rookie mistake didn't I? Got far too focused on what I was looking at and missed the obvious. Yes, the HT supply here is derived in an external unit, but that's not the only thing handling it is it? No, of course there's going to be some significant additional processing involved isn't there? Like an additional PCB in the display itself? Oh, like this one?
Idiot.
Oh look, another nine capacitors. Five ratings...a total of one of which I had in stock, figures.
Oh well...in goes another order to CPC.
That previous order also contained the ones I had been waiting for to recap the Apple II power supply as well.
Really simple one this.
It's astonishing how much smaller the new capacitors are than the old ones.
With the machine back together, our fault sadly is still present. It will run absolutely fine for 10-15 minutes before becoming very unstable. Either locking up, or randomly dropping out to the kernel monitor while trying to load software. I had also replaced the one electrolytic decoupling capacitor on the motherboard, a couple on the language card and the disk interface card. The tantalum bead caps I've left alone - those I've always found either work fine or just present a dead short, usually soon after being awoken from a long slumber.
My guess here is that we've got an IC somewhere that's acting up, most likely memory, when warm. Sadly fault finding at that level will need to wait until we're back from Scotiacon - I'm just not going to have time before we leave.
I have managed to actually get software loaded on the QL for the first time though. The vDrive isn't the most intuitive thing to use (especially given the command syntax on the QL is a little strange), but I've now got it behaving well enough for some technical demonstrations at least.
I'd never felt quite such an achievement at getting a word processor running before!
I have to admit to being really impressed with the display. It's really sharp and has really vivid colours, would have looked absolutely great on a proper RGB CRT display back in the day.
In other news, the Renault has been out and about a couple of times over the last couple of days.
Not as though my cars are easy to spot out and about or anything.
Today she was out again on a recycling centre run. It's quite astonishing how much you can fit into this car when the seats are down.
No cars on my fleet get a free spot on this fleet, though admittedly I would rather have been using the Caddy for a job like this. However our local council have deemed it to be a commercial vehicle, so that's not happening. This was just an old mattress and mostly cardboard though, no dirty waste or anything that was likely to damage the interior. I'd not even consider shifting anything dirty or likely to damage anything like garden waste.
I do need to properly check the battery though. It's still struggling a bit it sounds like. It's a basic Halfords one and from the photos I've seen it's been in there since 2017, the car hasn't been in regular use since then so I'm sure it's been run flat at least a couple of times. Wouldn't surprise me in the slightest if this one was past it's best.