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Fixing my old ZX Spectrum 48K issue 4AHi Guys, I trying to fix my old Spectrum 48K. Looks like my dad used a wrong power supply as the ULA had a bit missing and so did the 7805. So I rep…
... /> If you have a logic probe or an oscilloscope, it may ... -
Fixing my old ZX Spectrum 48K issue 4AHi Guys, I trying to fix my old Spectrum 48K. Looks like my dad used a wrong power supply as the ULA had a bit missing and so did the 7805. So I rep…
... /> If you have a logic probe or an oscilloscope, it may ... -
Poorly Issue One 16k spectrum diagnosis?Hello, everyone. :smile: I was lucky enough to buy an Issue One 16k rubber key the other week; I didn't know it was an Issue One till I opened it up…
What test gear do you have apart from a multimeter?
For example, do you have a logic probe or an oscilloscope?
The next step is to do some tests with the system powered on.
[I][B]Mark[/B][/I] -
Yellow issue 4A keyboard madnessNote sure if this is a similar problem to the one CornishManicMiner has, but one of my yellow issue 4A boards is driving me crazy. I had it in variou…
... heatsink attaches), use the red probe to test each lead of ... resistance range, put one meter probe on one lead of one ... resistor, put the second meter probe on the other lead of ... -
Elite Kickstarter ProjectAs some of may know Steve Wilcox of Elite is currently close to raising ?60k via Kickstarter to begin manufacturing a USB spectrum keyboard. I have g…
... kelly did good games for probe though.
there is ... -
Spectrum Not Responding to Keyboard InputHello, sorry if this thread is not in the correct place, This is my first post and I'm not sure where to post this type of thread. :lol: Anyway, I r…
... gear, e.g. a logic probe or an oscilloscope?
probe or better still, an oscilloscope ... -
Several software titles, maybe interesting for preservation purposes?I don't know if this is an appropriate post in the appropriate forum, but this is my question. I have about 40 ZX Spectrum games and other software …
... : A MANTRONIX / B RED DOOR / PROBE / TARTAN SOFTWARE / (c) ALL RIGHTS ... RESERVED PROBE & TARTAN SOFTWARE / 48K/128K ... -
Several software titles, maybe interesting for preservation purposes?I don't know if this is an appropriate post in the appropriate forum, but this is my question. I have about 40 ZX Spectrum games and other software …
... : A MANTRONIX / B RED DOOR / PROBE / TARTAN SOFTWARE / (c) ALL RIGHTS ... RESERVED PROBE & TARTAN SOFTWARE / 48K/128K ... -
New user with a dead 48k issue 2Hello all I've found my way here from watching some excellent youtube videos by Joulesper Coulomb in an attempt to fix a issue 2 rubber key 48k I bo…
... also): logic analyser, ossillscope, logic probe with a pulse indication.
New user with a dead 48k issue 2Hello all I've found my way here from watching some excellent youtube videos by Joulesper Coulomb in an attempt to fix a issue 2 rubber key 48k I bo…
... also): logic analyser, ossillscope, logic probe with a pulse indication.
ZX Spectrum Clock Signal Restorer Circuit[SIZE=5][U][B]ZX Spectrum Clock Signal Restorer Circuit[/B][/U][/SIZE] The circuit below is an experimental circuit. It has only been "tested" using…
... , but as I removed the probe from the output it didn ... only one "end" of the probe. As I connected the ground ...Fixing my old ZX Spectrum 48K issue 4AHi Guys, I trying to fix my old Spectrum 48K. Looks like my dad used a wrong power supply as the ULA had a bit missing and so did the 7805. So I rep…
... used the point of my probe to connect the pin to ...New video about S-video modification on Issue two 48K Spectrum.I just finished an s-video modification on an Issue two 48K Spectrum so I made a video about it. Most of the technical details are in the video; if y…
... short from a misplaced scope probe or an improperly insulated wire ...Issue 3B no soundI just noticed that there's no sound in the Issue 3B Speccy that I've been fixing. Is it more likely that the speaker is bust or is it TR7 and D9? …
Does clicks in earphones through mic mean that ULA is ok? I've recently replaced it since the original wouldn't load tapes. It's the latest revision.
I also have a logic probe. Would that be of any help in troubleshooting?Help me fix my grail ZX 128k SpectrumHi all, Ok today my grail toaster rack ZX spectrum 128k turned up. I finally found one and for a reasonable price. I powered it up and..... Nothing …
... your multimeter, place the ground probe on the middle pin and ...Help me fix my grail ZX 128k SpectrumHi all, Ok today my grail toaster rack ZX spectrum 128k turned up. I finally found one and for a reasonable price. I powered it up and..... Nothing …
I did test this and I got nothing on the multimetre. I put the black probe on the middle black wire and red probe on the red wireHelp me fix my grail ZX 128k SpectrumHi all, Ok today my grail toaster rack ZX spectrum 128k turned up. I finally found one and for a reasonable price. I powered it up and..... Nothing …
... a result your meter probe / logic probe / 'scope probe can move and short ...Help me fix my grail ZX 128k SpectrumHi all, Ok today my grail toaster rack ZX spectrum 128k turned up. I finally found one and for a reasonable price. I powered it up and..... Nothing …
ZX Spectrum 48K AV IssueOK so I dugout my old 48K Speccy today and decided to AV mod it. I did the mod (pretty easy) but the picture I am getting is this. [url=http://posti…
... normally the red socket/lead/probe).
I will ... assume that the red probe is the positive one ...
Connect your black probe to the middle leg (the ... br /> Now connect your red probe to the middle leg (the ... turn, connect the black probe to each of the ...ZX Spectrum 48K AV IssueOK so I dugout my old 48K Speccy today and decided to AV mod it. I did the mod (pretty easy) but the picture I am getting is this. [url=http://posti…
... pin 1 (black probe) and pin 16 (red probe). If you get ... pin 8 (red probe) and pin 16 (black probe). If you get ...Spectrum 48k ProblemsHi all Got my 48k today but it's playing up abit... First time i turn it on it was like this: [IMG]http://s26.postimg.org/hlg9d3f3d/IMG_20140830_…
... IC's with the ground probe on pin 16 (top right ...Spectrum 48k ProblemsHi all Got my 48k today but it's playing up abit... First time i turn it on it was like this: [IMG]http://s26.postimg.org/hlg9d3f3d/IMG_20140830_…
... the other", apply the red probe to the end with the ...Trantor - The Last StromtrooperA couple of questions about this game: 1) Do you think Trantor would benefit from a map? (not a thing people would use back then, but that seems a "…
... to the character reside with Probe Software, and a news item ... David Perry (who worked for Probe), although he's not credited ... on WoS.
Later Probe/Perry releases were: Dan Dare ...Help with 128k greyHello friends, need some help here on try fixing a +2 grey spectrum128. To keep it short, opened the case and the voltage regulator was missing, the …
... chip I was pushing the probe and the contact seamed ok ...Testing a car boot +2 PSUI was lucky to get a +2 PSU recently from a local car boot for a great price. As a hardware novice, I wondered what the risks are from just pluggin…
... you slip and a meter probe touches two pins of the ...Weird symptom number 2...I got a new keyboard membrane for my Spectrum+ plugged it in and low and behold the weird left to right printing of the copyright message disappeared…
... I just place the black probe on the heat sink, power ... IC pin with the red probe. The multimeter being set to ...Weird symptom number 2...I got a new keyboard membrane for my Spectrum+ plugged it in and low and behold the weird left to right printing of the copyright message disappeared…
... I just place the black probe on the heat sink, power ... IC pin with the red probe. The multimeter being set to ...Weird symptom number 2...I got a new keyboard membrane for my Spectrum+ plugged it in and low and behold the weird left to right printing of the copyright message disappeared…
... I just place the black probe on the heat sink, power ... IC pin with the red probe. The multimeter being set to ... ] Yes.
The black probe needs to be connected to ... very, very careful with the probe used on the pins. If ...Sinclair ZX Spectrum 128My loving mum has brought me back one of these beauties from a carboot sale but I'm haven a slight problem with it I CAN'T FIND THE ON SWITCH!!!!!…
... a multimeter, with the ground probe on centre (be careful not ...Weird symptom number 2...I got a new keyboard membrane for my Spectrum+ plugged it in and low and behold the weird left to right printing of the copyright message disappeared…
... track. Putting the red positive probe on the INF pin on ... the ULA and the black probe on the various points I ... />
Putting the negative black probe on pin 5 (INT) on ... tests with the red positive probe I got:
[LIST ...
