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The great 128k ConversionWell, I am not sure if it is going to be great. Hopefully it will! This evening, I set about getting my Issue 6A Spectrum Plus working. I suspecte…
... been connected up with the wrong polarity, back at some time in ... -
Grey +2 - DOA and no power lightTook a punt on a grey +2 at the weekend to be a spare. It was "untested" although so were all my other +2's which are all fine. Tried to power th…
... blown? Perhaps someone stick the wrong polarity in it or something? Any ... -
Election of the new maintainer of the TZX formatHi folks, the topic says all, let the discussion begin :) Luca
... some previous discussion about the polarity of the block, I still ... the past ?maybe I'm wrong? the ZX Spectrum is unable ... tape player plays at the wrong polarity, the game fails to load ... -
Election of the new maintainer of the TZX formatHi folks, the topic says all, let the discussion begin :) Luca
... tape player plays at the wrong polarity, the game fails to load ... -
ZX Spectrum 128+ problemsHello!I recently purchased and got myself a spectrum 128+ from ebay.The item did not have an original power supply so i got a power supply of 9volts …
... of a second with the wrong polarity is all it takes for ... a diode to prevent reverse polarity damage, but he didnt. It ... placeholder page).
"Reverse polarity destroys the regulator almost instantly ... -
ZX Spectrum 128+ problemsHello!I recently purchased and got myself a spectrum 128+ from ebay.The item did not have an original power supply so i got a power supply of 9volts …
... of a second with the wrong polarity is all it takes for ... -
I killed my SpectrumMy room was a mass of leads.... and I plugged my NES transformer into my ZX Spectrum +2 accidently, frying it :cry: , am I screwed? or is there somet…
... was DC and the right polarity. As its AC connecting it ... second, and one with the wrong polarity for the other 25 times ... -
Build your own Pentagon 1024SLAlexey aka KingOfEvil was so kind to give me an english manual for the Pentagon with most (except for the floppy controller) chips adapted to "wester…
... there's a little more wrong with the 12V supply and ... in 2 transistors with a wrong polarity. Still doesn't explain the ... -
issue 2 board c34 getting hotHi All, Can anyone help with c34 getting hot very quickly? I`ve got an issue 2 board, there is no `buzz` from coil. yet the spectrum initalises to co…
Capacitors should never get hot. But electrolytic ones do if they are put in with the wrong polarity. (Tantalum ones by contrast tend to explode). -
48k + Power supplyHi, Anyone know where I can get a replacement PSU for the 48k Plus? Nothing on Ebay at the minute. Looks like the end is Imminent for my one! Tha…
... border. I tried swapping the polarity top around and nothing.[/quote ... you connected it with the wrong polarity (and it sounds like you ... warnings above about getting the polarity right. We did try. -
Alternative speccy power supplysI know all us would have our speccys with the original power supply,but often i would see a distress call from people who got speccy from ebay but on…
... connector might have the wrong polarity, and you will end with ... (provided it has the same polarity). In case of +2A and ... -
+3 psu schematics and partsHi everyone. Does anyone have or knows where to get the +3 psu schematic? I'm trying to repair one but i cant find any info on the parts reference. …
[QUOTE=Jose_Leandro;449720]Please, can you tell me what mistakes you found ?[/QUOTE]
Bad polarity on C8 and C2. The 4x1n4001 wrong polarity.R6 bad connected. -
+3 psu schematics and partsHi everyone. Does anyone have or knows where to get the +3 psu schematic? I'm trying to repair one but i cant find any info on the parts reference. …
... the electrolytic capacitors have definitely wrong polarity. I also agree the R6 ... -
Dead Spectrum SocietySo I'm getting back into real Sinclair computers rather than emulators. During the summer months I was lucky enough to buy a working ZX81 and was giv…
... applying the voltage with the wrong polarity.
The UHF modulator ... -
Semi-Dead Spectrum - Help RequestedI have finally got my hands on my two old Spectrums - neither of which work, but ideally I hope to get both of them working again. Spectrum number o…
... was once connected with the wrong polarity.
I'd then ... -
Semi-Dead Spectrum - Help RequestedI have finally got my hands on my two old Spectrums - neither of which work, but ideally I hope to get both of them working again. Spectrum number o…
... was once connected with the wrong polarity.[/QUOTE]
OTOH, if ... -
Plus D Voltage Regulator OrientationHi, I?ve got a Plus D Disc Interface circuit board without case from a friend. Sadly he sends it to me without care for proper packaging. So it arr…
... connector is fitted with the wrong polarity.
Desolder it (cutting both ... capacitor is damaged when the polarity of the voltage is incorrect ... -
Can you use a ZX81 psu to power a ZX80?Can you use a ZX81 psu to power a ZX80 without causing any Damage? Cheers
... on the PSU with the wrong polarity.. That only killed the 7805 ... -
Harlequin clone...PCB manufactured!Using Chris Smith's detailed schematics and project notes from the Harlequin... a Speccy fan in the United States by the name of Don (Superfo) has de…
... will sort out the correct polarity, so you need not worry ... plug being wired with the wrong polarity. You can still use peripherals ... ensure you have the correct polarity on the plug for the ... -
Toastrack refurbishmentYesterday I opened a drawer in my old desk and discovered 2 complete toastrack 128s and a board only for the same. As I already have a fully working…
... too high, or of the wrong polarity can also cause silicon chips ... separate occasion accidentally connected the wrong lead and done it myself ... -
Hot plugable edge connector?Could the spectrum's edge connector have been made hot plugable without adding much to the manifacturing costs? I was thinking along the lines of a…
... not happy at all with wrong polarity or excessive over voltage. Watching ... -
Smokin... more 48k woesHi, it looks like I've converted another Spectrum 48K+ into a smoke machine. I'd been rebuilding an Opus Discovery unit and everything looked good. …
... react kindly to having the wrong polarity on it.
Use ... -
Smokin... more 48k woesHi, it looks like I've converted another Spectrum 48K+ into a smoke machine. I'd been rebuilding an Opus Discovery unit and everything looked good. …
... react kindly to having the wrong polarity on it.
Use ... . You can't really go wrong here, but DON'T be ... -
Best Worst Gadgets of the 80sWhilst working today my mind began to wander as it does regularly to the 1980s. I began to think of all the fads and gadgets that came and went, some…
... , (I think it was the wrong polarity too), and it started to ... -
No display on a 128 toastrackHi All, I just bought a 128k off ebay with the usual, "it worked last time I used it", so I read into this "it does not work". True enough, it does n…
... used) and noticed that the polarity is wrong.
I am now ... connecting it up with the wrong polarity cause the display issue? I ... thought that connecting with the wrong polarity would cause a much bigger ... -
No display on a 128 toastrackHi All, I just bought a 128k off ebay with the usual, "it worked last time I used it", so I read into this "it does not work". True enough, it does n…
... psu does not have a polarity switch.
You say ... it) and never used the wrong polarity psu.
I am ... -
Was there a POKE that broke the SpectrumHi Everyone I've been recalling myths and rumours from back in the day. You know "Lunar Jetmans" trailer and that sort of thing. But one rumour …
... , or one which outputs the wrong polarity. Either is guaranteed to blow ... -
Opus Discovery "the big switch on" (after 20 years)I have a few of these Opus Discovery's with different Eproms in that have not been swiched for 15-20 years or so . I am in no rush to switch any on …
... which 'isolate' when connected to wrong polarity. -
ZX 48K power plugHi! I'm a newbie, this is my first post. I have a ZX Spectrum 48K, which has been lying around for ages. Its psu lacks a plug. The Psu is 9v and 1…
... have to confirm the correct polarity. The wrong polarity (or a AC supply ... Spectrum.
The correctly polarity is the outside MUST be ... -
Modern PSU: picture improvement?I've recently seen advertised some 'replacement power supplies' for Spectrums for which the claim is made that they may make an improvement in pictur…
... outputs
Plus the polarity if DC. And the voltage ... easy to plug the wrong PSU (or the wrong polarity) in to an ... of course watching out for polarity and the actual output voltages ...
