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likely damage caused to +2 by too highly rated supplyHi. did have a quick search but couldn't see an answer. I've been offered a +2 which the previous owner damaged by connecting too high a power supply…
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[B]The Spectrum 128 +2 (Grey model)[/B ...
[B]The Spectrum 128 +2A/B (Black model ... no internal fuses or regulators. This particular breed of spectrum ... been sent to the 5v input(s) then there ... apropriate PSU on the Spectrum and let us know ... -
likely damage caused to +2 by too highly rated supplyHi. did have a quick search but couldn't see an answer. I've been offered a +2 which the previous owner damaged by connecting too high a power supply…
... />
[B]The Spectrum 128 +2 (Grey model)[/B ...
[B]The Spectrum 128 +2A/B (Black model ... no internal fuses or regulators. This particular breed of spectrum ... been sent to the 5v input(s) then there ... apropriate PSU on the Spectrum and let us know ... -
Amperage drastic reduction in a rubber 48KWell, I am now with the approach of a drastic reduction ZXSpectrum amperage. As a first step would change the Z80 processor for other (Z80C). Unfortu…
... the circuit generating the signal-5V and 12V), which is ... of faults in the Spectrum's, that one day ... feed section of the Spectrum is forced to provide ... expected.
5V with no problem, because the 7805 has ... you give power to a Spectrum off) but beware! ... -
Amperage drastic reduction in a rubber 48KWell, I am now with the approach of a drastic reduction ZXSpectrum amperage. As a first step would change the Z80 processor for other (Z80C). Unfortu…
... converter section with a dedicated 5v->12v chip to ... without the voltage conversion circuit (no need to remove, just disconnect ... />
I think my modified Spectrum was down to around 300 ... encoder, one that works with 5V supply (like: remove some parts ... -
New speccy modelThe 48k toastrack ;) [img]http://alistairtesting.no-ip.org/48k-toastrack.jpg[/img]
... /> I have myself some killed Spectrum (mostly by defect interfaces 1 ... on two of them), and no problems yet, except by the ... , it transforms the voltage above 5V into heat. So 1 Ampere ... -
New speccy modelThe 48k toastrack ;) [img]http://alistairtesting.no-ip.org/48k-toastrack.jpg[/img]
... I have myself some killed Spectrum (mostly by defect interfaces ... two of them), and no problems yet, except by ... it transforms the voltage above 5V into heat. So 1 ... cheap to repair a spectrum as long as the ... that the voltage above 5V is transformed into heat.< ... -
New speccy modelThe 48k toastrack ;) [img]http://alistairtesting.no-ip.org/48k-toastrack.jpg[/img]
... and cheap to repair a spectrum as long as the problem ... proves that the voltage above 5V is transformed into heat.
No Idea why.. So I prefer ... , much older than ZX80, so no wonder that Recoms are much ... -
Question about divide +Hi A friend has sent my a faultly divide + to see if I can repair it. If I use this divide+ with a spectrum 48K (That works perfectly with my stand…
... . RESIDOS need this MB02 mode (no extra divide pages).
5V instead signal MREQ on through ... unstable data bus in ZX Spectrum. Fix this problem is very ... reset button (usable on ZX Spectrum 14/48kB models without reset ... -
QL in bits from car boot saleI was at the car boot sale today, and I bought the following for ?40: * Spectrum+ * Tape recorder * An external Microdrive (no Interface 1 unfortuna…
Just noticed that there appears to be no voltage regulator (there IS a heatsink, it's in the box). Does it use the same 5V one as the Spectrum 48k? -
QL in bits from car boot saleI was at the car boot sale today, and I bought the following for ?40: * Spectrum+ * Tape recorder * An external Microdrive (no Interface 1 unfortuna…
[QUOTE=Muzer;545671]Just noticed that there appears to be no voltage regulator (there IS a heatsink, it's in the box). Does it use the same 5V one as the Spectrum 48k?[/QUOTE]
No, a stronger version... 2Ampere (I think 7805CV). -
rubber key Spectrum 48k problem :(when i plug the spectrum in all i get is a black screen with a red border and sometimes flashing blocks. the spectrum worked until about 20 mins ago…
... . You should get pin 1 -5V, pin 7 +12V, pin 8 ... +5V.
If you don' ... you still get nothing and no hot chips, and all voltages ... chips in a known good Spectrum).
Let us know ... -
Challenge Sprint 4x tape recorderHi, I noticed a [url="http://www.worldofspectrum.org/infoseekid.cgi?id=1000051"]Challenge Sprint[/url] on eBay, and checked out the WoS entry for it…
... t checked if it uses 5V or 9V, or both. ... It surely takes 5V as the logic circuits (we ... speaker. The Sprint has no built-in speaker (although ... designed for a 16K RAM Spectrum, so it loads entirely ... I loaded into my 48K Spectrum, back in 1984 :)
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Spectrum 8bit IDE adaptersHello there my fellow WoS'ers Today I am pleased to (finally) release these little adapters into the wilde [URL="http://postimage.org/image/1aceto6…
... some more detials for my spectrum loving friends here to consider ... adapter in the Rubber Keyboard Spectrum, while for the semi-experienced ... are intermittent seek failures and no IDE device reported
5v[/B]
[INDENT]This is ... -
Help with Spectrum 128k reparationHi! I have the following symptoms with a 128k unit version 6U - On power on, black and white bars (one char width each), white background - Once po…
... single supply RAM's, so no need to change ZX650 transistor ... image through the RF output, +5V and +12V supplies are ok ... area is to force your Spectrum to boot into 48K mode ... you will have a 16K Spectrum right now). If this is ... -
Second Hand SpectrumHi just joined the Forum. I have picked up a Spectrum at a s/h shop and would like some advice please. I have had two ZX81's packed away for severa…
... /> [quote]
Q. Does the Spectrum require a similar manual tuned ... M RAMTOP no good then you have a 16K Spectrum, or a ... powered it from a external 5v (I think) power source.
Spectrum repairs, including that).
Repairing a faulty 48K issue 2.I am investigating one of a pair of non-working issue 2 48K Spectrums that have been sitting in a cupboard untouched for quite a few years. I haven…
... [URL="http://bitcycle.org/retro/spectrum/SRAM_replacement/"]this description[/URL] of ... with the other parts), and no sockets to get in the ... to find and only use 5V supply. Or try 64Kx4 or ...Faulty Multiface 1Hello... I have a MF1 that doesn't work. You press the red button and nothing happens... It is not my spectrum's M1 line because MF128 works fine on …
... out from a powered up spectrum. Probably the 74LS74 is prone ... because it gets Vcc +5V.
No I won't bin ...Repairing a faulty 48K issue 2.I am investigating one of a pair of non-working issue 2 48K Spectrums that have been sitting in a cupboard untouched for quite a few years. I haven…
... (/CE)[/QUOTE]
No, on an Issue 2 at ... been using an Issue 4 Spectrum+ in some tests. It ... instead? The 12V and -5V (and +5V) lines at the 4116s ... does appear the Issue 2 Spectrum went through a number ... ULA on the Issue 2 Spectrum I have been working ...What spectrum?I am going to have a gent send me some Spectrum hardware in the future. Me being a american and knowing nothing of the sort, what would be the best o…
... a gent send me some Spectrum hardware in the future. ... other night but there was no-one about :)
5v, 12v and -12v. To ... cable and power the spectrum from that so you ... +D but I have no experience with those. There ...Need for low budget Kempston joystick interfaces?I am thinking of designing a lowcost (< ?10) Kempston joystick interface. Small, one (double sided) board, throughput edge. Others need some too?
... supply, although its inputs are 5V tolerant. The outputs go from ... 5V, but this is ok for the TTL inputs at the Spectrum ... . You could use a XC9536 (no XL) which is a 5V ... directly use the regulated 5V supply from the Spectrum, but these are ...BeginnerIm having a go at fixing a spectrum which has been in the loft for 20 years and would like some advice please.... I have downloaded the 'spectrum se…
... in some 20K resistance position. Spectrum off. Then measure over D11 ... use that. When there is no difference in values found, ... resistance towrds ground of the -5V rail, as suggested by Guesser ... two directions again. There is no standard value, you might need ...Converting Atari Joystick to Sinclair standardToday I decided to modify my Atari stubby joystick to Sinclair standard, basically detach the cord out of an old SJS and wire that onto the pads insi…
There is no ground wire in the SJS ... " signal is what the spectrum sets to 5v when it is reading ... the appropriate input and the spectrum sees that keyboard line active ...BeginnerIm having a go at fixing a spectrum which has been in the loft for 20 years and would like some advice please.... I have downloaded the 'spectrum se…
... an Issue 4 or later Spectrum, but quite likely not in ... C47 would likely affect the -5V rail.
Pay careful ... still doesn't revive the -5V supply, I'd next check ... Im getting -1v not the -5v required so intend to start ... chips in my link are no good :mad:Three faulty machines - help!I have three Spectrums and all of them have suddenly collapsed and I can?t figure out what?s wrong. New here.... I own three Speccies but all of a …
... /> When I repair a ZX Spectrum, first thing I do is ... to hook up the Spectrum to a TV (no channel tuning!), and ... board), you should have +5V, +12V and -5V there. If not: power ...Three faulty machines - help!I have three Spectrums and all of them have suddenly collapsed and I can?t figure out what?s wrong. New here.... I own three Speccies but all of a …
... br />
However the Spectrum+ is still a problem. I ... with white border - no cursor prompt, no Sinclair text. Where ... I repair a ZX Spectrum, first thing I do ... hook up the Spectrum to a TV (no channel tuning!), ... you should have +5V, +12V and -5V there. If not: ...Cheating games from FATWARE on DivIDEHere is patched versions of DivIDE system FATWARE 0.12(a)_POKE: [url]http://velesoft.speccy.cz/zx/divide/systems/fatware/fatware_012_(2012-01-02)_fo…
... the keyboard interface of the spectrum that connect the keyboard with ... ... 4.7 kOhm to VCC (5V). This way the keyboard is ... /> Using that circuitry I have no more problems with high keyboard ...Cheating games from FATWARE on DivIDEHere is patched versions of DivIDE system FATWARE 0.12(a)_POKE: [url]http://velesoft.speccy.cz/zx/divide/systems/fatware/fatware_012_(2012-01-02)_fo…
... the keyboard interface of the spectrum that connect the keyboard with ... ... 4.7 kOhm to VCC (5V). This way the keyboard is ... /> Using that circuitry I have no more problems with high keyboard ...ZX Spectrum TowerHi all, i am working on a ZX Spectrum 48K build in a PC tower case. Is there anyone who did it before? I have some questions duo the PSU. I have to g…
... some modifications on the ZX Spectrum when using a power supply ... : it's possible to feed 5V and 12V directly, but it ... an 7805, 12V should be no problem I think.
You ...DivIDE 57c non-bootable when CF card insertedHello, I have a DivIDE 57c with a CF-IDE40 adaptor. When no CF card is inserted, the Spectrum boots, FATware 0.12 kicks in, detects 0 volumes and b…
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When no CF card is inserted, the Spectrum boots, FATware 0 ... on my DivIDE Plus, the Spectrum doesn't boot at all ... (scrambled screen, no FATware) and the CF card ... /RESET on ZX bus and +5V
b) boost signal reset ...I've gone to the dark side...and bought myself an Amstrad CPC464 :-o, feel dirty probably a similar feeling kerb crawlers get :-P mind you gonna get a scart adapter so I can use…
... every way, no box will fit, no wardrobes will take, no shelf will ... hold it. No RF, 5v power ... bad.
Spectrum is about style, no 8bit computer come near ...
