Search found 6 matches

by Macross_VF1
Fri Dec 07, 2018 8:09 pm
Forum: Hardware
Topic: Return of the (slightly less) faulty ZX Spectrum
Replies: 3
Views: 1548

Re: Return of the (slightly less) faulty ZX Spectrum

As usual the help I'm getting is highly appreciated and helpful. Anyway here's an update. I might have actually done it! I've replaced the TR4 and TR5 as suggested and I've also changed all the caps. Now I get the proper voltages on the DRam and I seem to get a stable picture, though since I haven't...
by Macross_VF1
Sun Dec 02, 2018 8:17 pm
Forum: Hardware
Topic: Return of the (slightly less) faulty ZX Spectrum
Replies: 3
Views: 1548

Return of the (slightly less) faulty ZX Spectrum

A few weeks back I asked for help with a problematic ZX Spectrum ( https://spectrumcomputing.co.uk/forums/viewtopic.php?f=22&t=1107 ) and it was pretty much decided that the voltage regulator was faulty and that it might have damaged other components as well. I've changed the regulator and the u...
by Macross_VF1
Sun Nov 18, 2018 10:23 am
Forum: Hardware
Topic: Help needed with two Spectrums
Replies: 8
Views: 2115

Re: Help needed with two Spectrums

Nice rant! :D However you are probably far more correct than I could ever hope to even understand so I won't begrudge you it. ;) Anyway, it certainly seems like the voltage regulator is doing unspeakable things to the computer. For now I'll shelve this unit and treat is as spares, but I might try to...
by Macross_VF1
Sat Nov 17, 2018 10:08 pm
Forum: Hardware
Topic: Help needed with two Spectrums
Replies: 8
Views: 2115

Re: Help needed with two Spectrums

I should probably also mention that I'm using a high quality replacement PSU for the unit. The original one gives 13V out and I would rather avoid having it fry the computer. In fact I have noticed a marked tendency for old console and computer (I currently own 153 machines) PSUs to produce a lot hi...
by Macross_VF1
Sat Nov 17, 2018 9:47 pm
Forum: Hardware
Topic: Help needed with two Spectrums
Replies: 8
Views: 2115

Re: Help needed with two Spectrums

Very helpful stuff, thanks in advance even if the unit turns out to be a waste of time. I read through pretty much everything that could be found in the page you linked to and did tests based on that: The edge connector Pin 3B/+5V: +7.53V Pin 4B/+9V: +9.22V Pin 20A/-5V: -7.47V Pin 22A/+12V: +9.21V 4...
by Macross_VF1
Sat Nov 17, 2018 10:57 am
Forum: Hardware
Topic: Help needed with two Spectrums
Replies: 8
Views: 2115

Help needed with two Spectrums

Hello Spectrum enthusiasts! I am need of assistance concerning two ZX Spectrums in my possession; A standard 48k model and a plus model. The 48k model was bought recently and I knew it likely would work poorly. And sure enough, the power supply needed some work and the faceplate was an awful mess. A...