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<1234567…34>
  • 5v reg replacementHi all, Have been playing with one of my Issue 2 Spectrums and decided to replace the 5v regulator & heatsink with this wee switching reg I had lyin…

    ... and decided to replace the 5v regulator & heatsink with this wee ...
    IanJ IanJ August 2014 Hardware
  • Broken ZX 48kHey all. I have acquired a broken ZX 48k. It looks in good condition - tried the membrane and it is working with my other 48k very well. When you tu…

    ... that is just after the +5V regulator), but nothing else was tempered ...
    Tom-Cat Tom-Cat September 2004 Sinclair Miscellaneous
  • My new Spectrum 128K+2A...Hi guys, As most people here, my first micro computer (1986) was a Spectrum (128+2 grey - I'm in France). I sold it near 1990 to buy my 1st atari ST…

    ... problems with it, exept the 5V regulator gone dead one time, and ...
    bugpat bugpat February 2007 Hardware
  • Mb02+ideAs I wrote in the hardware forum there will be a small number of a redesigned MB02+IDE (nearly the original MB02+ including IDE interface also for CF…

    ... />
    optional: implementing of a 5V regulator to use eventually the same ...
    ingo ingo October 2007 Announcements
  • Toastrack troubleI just received a toastrack off ebay that someone had bizarrely removed the modulator, no matter, ill go through RGB and replace that at some point, …

    ... ! :o
    Turned out the 5v regulator was sellotaped in place, what ... they were taped to the regulator, very crude but still, I ...
    Macc Macc December 2011 Hardware
  • WIP: ULAPlus hardware implementationThis aims to be an "almost" plug-in replacement for the Sinclair ULA chip fitted in Spectrum 16K/48K/Plus machines. It comes in a form of a small PC…

    ...
    Another thing is the 5V tolerance issue of the FPGA ... be used to make them 5V tolerant. I'd have ... FPGA interface need to be 5V tolerant: for example, VRAM ... t need resistors to be 5V tolerant and doesn't ... .6 EUR EUR
    2.5V regulator: 0.92 EUR
    [ ...
    mcleod_ideafix mcleod_ideafix August 2012 Hardware
  • ZX Spectrum problemsHello Everybody, I am new here, and I need some help in my ZX repairs : - I have a ZX Spectrum 48k board (issue 2) which power up but remains stuck o…

    ... all are ok, and voltage regulator ok,
    but I don ... the main memory and the +5V is missing on the pin9 ... is present on the main 5V regulator.

    Please if anyone ...
    haceZX haceZX November 2012 Hardware
  • Composite picture qualityI have read many many discussions here about the composite video modification of the Spectrum 16/48K models. I have choosen one of the simplest comp…

    ... Spectrums had new capacitors, the +5V regulator was replaced with Traco Power ...
    jimre jimre January 2014 Hardware
  • How important is the 9V line?I'm in the middle of resurrecting an Opus Discovery. The transformer is gone so Im using a small switched mode PSU from a PC. My plan is to bypass …

    ... the rectifier connecting to the 5v regulator also runs to the 9v ...
    rune rune October 2014 Hardware
  • Issue 2 Spectrum - Black screenHi I have an issue 2 spectrum which I'm having some issues with. I bought it on ebay so have no idea of the history or how it came to be broken. Whe…

    ... inspected it, I found the 5v Regulator was fine but TR4 was ...
    whoremoan whoremoan November 2014 Hardware
  • 48K No Sound?Repaired a 48K spectrum the other day that had the wrong PSU Plugged into it. Replaced 5v regulator, TR4, TR5 and all Electrolytic Caps. Spectrum th…

    ... Plugged into it.
    Replaced 5v regulator, TR4, TR5 and all Electrolytic ...
    whoremoan whoremoan November 2014 Hardware
  • Redesigning the ZX Spectrum 128k - A lifelong dreamHello, I am myPinballs (Jim) and i run a small business here in the uk making replacement 8-bit hardware pcbs for arcade pinball games as well as…

    ... /> • Power leds
    • Low power 5v regulator
    • Single 12v supply power ...
    myPinballs myPinballs August 2016 Hardware
  • bizarre error on a grey ZX Spectrum+2 - the long search for a small problemHi, I got a ZX Spectrum+2 that worked a bit but crashed while loading or running 128k games. I installed a 128k-test-ROM that told me about RAM fa…

    ... /> Finally I removed the 5V regulator cable from its socket and ... and so I changed the 5V regulator and also the electrolytic ... the transverter while using the 5V regulator -> Buzzsasw did run ... the input of the switching regulator - on the 9V line. ...
    ingo ingo November 2016 Hardware
  • blew up my 128i did it - damn. i accidentally reverted the polarity of the power power supply, so ended up with a blown 5v stabilizer, which i replaced, but there …

    ... or 12V feeding) and the 5V regulator. the regulator is available everywhere. i ...
    mark mark December 2001 Sinclair Miscellaneous
  • Amstrad or Sinclair: Who Made Better Speccys?Just wanted to know....

    ... chips were horrendously fragile. The 5V regulator and heatsink was poorly ventilated ...
    absorbentgnome absorbentgnome July 2005 Sinclair Miscellaneous
  • "Unknown disk format"-error on Spectrum +3Hi, I have just gotten around to changing the drivebelt in my newly acquired +3. I tried to format one of the 3" disks I bought on eBay the other we…

    ... (ish) floppy drives run on 5v. To tell you the truth ... and ran it through a 5v regulator. Works a charm. :)

    KeepGood KeepGood December 2005 Hardware
  • my dodgy speccys.hi people, i was wondering if i could engage some opinions / thoughts / ideas of anyone, regarding my current "fixing up" of my speccys, since you s…

    ... as it has an internal 5V regulator. Get the polarity right though ... everything of power. The voltage regulator may get very hot if ...
    DEATH DEATH May 2006 Hardware
  • Spectrum+3Hi all, Got my Spectrum+3 from eBay this afternoon. Powered it up to find the drive belt is a no go. So I need a drive belt, Ok easy to get hold of n…

    ... PSU from ebay and a 5V regulator :)
    DEATH DEATH July 2007 Hardware
  • PC power source and Spectrums.I'm planning to use a basic PC ATX power source (300W) for all my sinclair equipment, but I have two questions: - I've read about some nasty things …

    ... got myself a 7809 (9v regulator), supplied it with +12v and ... the speccy. Then removed the +5v regulator and connected the PSU's ... +5v to the original 5v regulators output pin on ...
    LaesQ LaesQ October 2007 Hardware
  • 128k heat sink - ULA problems and a hintHello, I had two ZX Spectrum 128k with a similar behaviour. One item worked only a short time after switching on and then there were increasing RAM …

    ... .

    Place an additional 5V regulator (7805) inside the divIDE+ case ... connector. In this case the +5V connection on edge connctor should ... into divIDE+ and so the 5V regulator inside spectrum has lower power ...
    ingo ingo January 2009 Hardware
  • plus3e simple ide interface problemhi, I prepared a 8bit simple ide interface 3 days ago, but I got problems (with or without ide cable connected). 1.First of all, I have to press re…

    ... ) also M1 goes high (say 5V).

    So when there ... think.

    - Replace the 5V regulator, as a test.
    - You ...
    roko roko February 2009 Hardware
  • Issue 2 Spectrum overheating keyboard membraneI think I have an issue 2 ZX Spectrum. I don't want to take it apart again as I had problems replacing the keyboard membrane. With Interface 1 conne…

    ... />
    a) The internal +5V regulator is a simple, robust, but ... more than needed by the regulator. And Spectrums were built ... .
    2) Replace internal regulator with a low-drop version ... and thus bypass the internal regulator entirely. Has anyone tried that ...
    RetroTechie RetroTechie February 2009 Hardware
  • Remove +12 Volt itemsWhich items can be removed on a ZX48K issue 4b PCB if I don't need the +12 Volt? Micky

    ... can possibly cause problems. The 5v regulator (7805) is then required to ... heatsink to avoid damaging the regulator.
    alien8r33d alien8r33d April 2010 Hardware
  • Remove +12 Volt itemsWhich items can be removed on a ZX48K issue 4b PCB if I don't need the +12 Volt? Micky

    ... 1 DRAM's that are +5V only, maybe they work as ... can possibly cause problems. The 5v regulator (7805) is then required to ...
    RetroTechie RetroTechie April 2010 Hardware
  • Silver speccy on the inside, you know what it is ?I was looking at one of my 48k speccys it has a label underneath with the serial printed on it and signed and dated, there is no permanent serial num…

    ... , and a switch (next to +5V regulator) with markings "ch2 - ch3" on ...
    RetroTechie RetroTechie September 2010 Hardware
  • +2 power not working. Need helpHi folks, I'm hoping someone may be able to point out what could be wrong/needs fixing here. One of my +2's had a loose RF modulator. The 5v wire w…

    ... undoing that fix - maybe that +5V wire to modulator was disconnected ... , check supply voltages. Possibly the +5V regulator was killed, but that's ...
    RetroTechie RetroTechie October 2010 Hardware
  • 128+ and Divide+ not working togetheri think theres something wrong with my 128 (toastrack), divide+ just wont work on it, corrupted screen on bootup and with big thick black bars rollin…

    ... on the toaster, tested the 5v regulator with a multimeter (that I ...
    Macc Macc December 2010 Hardware
  • Spectrum 48k boots but small black dots start appearingAnyone any ideas where I should look first?

    ... some thermal grease between the 5v regulator and the heatsink and tightening ...
    Macc Macc January 2011 Hardware
  • Fully integrated ZX+Hi, I just want to show some inspiration for integration HW to ZX+ case ;-) - ZX48 issue 3 board, without all parts regarding video generating (pa…

    ... is needs only 5V and therefore regulated 5V supply from old router ... and because no heat from 5V regulator, temperature is fine.
    willcz willcz February 2011 Hardware
<1234567…34>

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