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Trying to repair a Speccy 48k - No PulsingI've had this machine for ages. I'd I've been putting off fixing it for some time now. So a couple of days ago I pulled it apart and started prob…
... by test gear (meter, logic probe, oscilloscope) so it's better ... -
ZX Spectrum 48K it only shows colored barsHello, I'm new to the forum and I need help with a ZX Spectrum 48K which I bought recently unfortunately defective. I want to mention that before t…
... voltage regulator), using a test probe, test each of the ULA ... -
Trying to repair a Speccy 48k - No PulsingI've had this machine for ages. I'd I've been putting off fixing it for some time now. So a couple of days ago I pulled it apart and started prob…
Thanks for the reply.
Checked pin 6 of the Z80. It's sitting just above 4V, but not pulsing in any way that's decreeable.
Logic probe shows no pulsing at any point on the motherboard.
Phil -
Trying to repair a Speccy 48k - No PulsingI've had this machine for ages. I'd I've been putting off fixing it for some time now. So a couple of days ago I pulled it apart and started prob…
... no pulsing (tested with logic probe) at any point on the ... -
Trying to repair a Speccy 48k - No PulsingI've had this machine for ages. I'd I've been putting off fixing it for some time now. So a couple of days ago I pulled it apart and started prob…
... seen when using a logic probe.
I put the ... seen when using a logic probe.
Putting the 6c001e ... -
Trying to repair a Speccy 48k - No PulsingI've had this machine for ages. I'd I've been putting off fixing it for some time now. So a couple of days ago I pulled it apart and started prob…
... it rises. On the logic probe, it looks to be low ... -
In-game Screen FlickeringHi folks, today while playing 'Beyond the Ice Palace' I noticed strange behavior of my Issue 6a Spectrum+. When I pressed '2' (for UP) + 'O' (for …
... /> I always attach the common probe of DMM to RF modulator ... -
Using the Quill - A beginner's guideDoes anybody know how I can get a copy/scan/download of this publication from 1995 Dragonsoft. 60 pages Authors: Simon Avery and Debby Howard. It's…
... the early nineties eg: Adventure Probe, Red Herring, Syntax etc.. It ... -
In-game Screen FlickeringHi folks, today while playing 'Beyond the Ice Palace' I noticed strange behavior of my Issue 6a Spectrum+. When I pressed '2' (for UP) + 'O' (for …
... connected one way round (red probe on one diode lead, black ... probe on the other lead of ... -
ZX Spectrum +3 repairI have my first +3 here, and it needs repairs. Hoping someone here can help me out. When I power it on I get this screen with black and white line…
... you have a meter/logic probe/'scope, also monitor the Z80 ... -
ZX Spectrum +3 repairI have my first +3 here, and it needs repairs. Hoping someone here can help me out. When I power it on I get this screen with black and white line…
... .
I decided to probe all signals again and make ... -
ZX Spectrum +3 repairI have my first +3 here, and it needs repairs. Hoping someone here can help me out. When I power it on I get this screen with black and white line…
[quote="Ast_A_Moore;926345"]if you try to take any measurements—all bets are off.[/quote]
Certainly the usual caveats apply about fixing the problem you're trying to diagnose by touching anything with a 'scope probe! :) -
48k packed up after cap changeHi all, I'm relatively new to the Sinclair world, my 8-bit repairs in past was lurking in the dark sides of Acorn, Amstrad and Commodore! I've got…
... saving up for a logic probe as I have a C64 ... -
1988-2018..OK This feels a little odd since it's always WhenIWasCruel who does these threads, but I've had the proxy approval from the man himself to go ahead a…
... [/img]
by [color=green]Probe Software Ltd (Daren White)[/color ... -
1988-2018..OK This feels a little odd since it's always WhenIWasCruel who does these threads, but I've had the proxy approval from the man himself to go ahead a…
... [/img]
by [color=green]Probe Software Ltd (Nick Bruty, Daren ... -
1988-2018..OK This feels a little odd since it's always WhenIWasCruel who does these threads, but I've had the proxy approval from the man himself to go ahead a…
... [/img]
by [color=green]Probe Software Ltd (Daren White)[/color ... -
Quick questionHello, can someone tell me what the screen looks like when you power a 48k spectrum that has no ROM chip installed ? Thank you. François
... there a signal I could probe to better understand the problem ... -
1988-2018..OK This feels a little odd since it's always WhenIWasCruel who does these threads, but I've had the proxy approval from the man himself to go ahead a…
1988-2018..OK This feels a little odd since it's always WhenIWasCruel who does these threads, but I've had the proxy approval from the man himself to go ahead a…
1988-2018..OK This feels a little odd since it's always WhenIWasCruel who does these threads, but I've had the proxy approval from the man himself to go ahead a…
Opus Discovery not WorkingHello hope you can help, or if this thread goes well that you also find the answers you are looking for... I have an Opus discovery that does not …
... ? Would I connect the black probe of my voltmeter here and ...Celebrity deaths...How about putting them all in one thread? In a sticky? As it seems to be a weekly thing at the moment? Save a bit of space and we can all do without …
... chance they got - shock, horror, probe. In the meantime I was ...Most animated games?Watching many Speccy game replays, I suddenly noticed in some games there're so many moving and animated sprites/object, not to mention the bullet st…
Many Probe games: [i]Savage[/i], [i]Trantor[/i], etc.Membrane issuesHello. From the title you might be assuming that my troubles come from a old membrane, but no. Quite the opposite. I ordered a Membrane from Retro…
... each to hold each meter probe, plus one to press a ...Fixing a poorly Issue 3 - Odd faults.Here's one for you Spectrum fixers, I warn you it's a long one. I've spent a couple hours this evening doing several repairs on a rubber keyed Speccy…
... continuity tester and a logic probe, I finally found a broken ...+3 - beeper sounds but no AY musicHi guys I am repairing a plus 3 revision 2 board that had no sound at all. Using schematics from https://zxnet.co.uk/spectrum/schematics/ I manage…
... C38, stick the oscilloscope’s probe to the “+” pad on the ...+3 - beeper sounds but no AY musicHi guys I am repairing a plus 3 revision 2 board that had no sound at all. Using schematics from https://zxnet.co.uk/spectrum/schematics/ I manage…
... C38, stick the oscilloscope’s probe to the “+” pad on the ...+3 - beeper sounds but no AY musicHi guys I am repairing a plus 3 revision 2 board that had no sound at all. Using schematics from https://zxnet.co.uk/spectrum/schematics/ I manage…
... few seconds before removing the probe; the audio signal is non ...+3 - beeper sounds but no AY musicHi guys I am repairing a plus 3 revision 2 board that had no sound at all. Using schematics from https://zxnet.co.uk/spectrum/schematics/ I manage…
... few seconds before removing the probe; the audio signal is non ...+3 - beeper sounds but no AY musicHi guys I am repairing a plus 3 revision 2 board that had no sound at all. Using schematics from https://zxnet.co.uk/spectrum/schematics/ I manage…
... few seconds before removing the probe; the audio signal is non ... continuous high state when the probe touched and back down when ...
