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<1234567…34>
  • Ferguson 3T31 circuit diagram availableFinally managed to get the circuit diagram for this beastie. I'll upload it to WoS soon enough, in the meantime, PM me with your email addy if you w…

    Finally managed to get the circuit diagram for this beastie. I'll upload it to WoS soon enough, in the meantime, PM me with your email addy if you want it.
    DEATH DEATH August 2013 Hardware
  • +2 (grey) Circuit Schematic?Has anyone got a circuit diagram for the original grey +2? There are a few diagrams in the back of the 128 service manual on WoS, but none of these …

    Has anyone got a circuit diagram for the original grey +2? < ... odd fault in the sound circuit that I want to diagnose ...
    trellis trellis July 2006 Hardware
  • zx spectrum +3hello fellaes from europe, greece, last week finally i found a zx spectrum 3, with a damaged drive, a power supply that works fine, and a black wire …

    ... connect +3 with a tape recorder?
    anykind or special for ... a +3 to a tape recorder via a special lead that ... ICs etc, there is a circuit diagram available on this site :)
    DEATH DEATH November 2007 Hardware
  • Born again Speccy user with problemsHello all, Firstly I'd like to say a big hello - this is my first post! When I was 8 or 9 or so my dad bought a ZX Spectrum 48K and a whole bunch o…

    ... that mean? Looking at the circuit diagrams I can see no ... it anyway. Looking at the circuit diagram once more, I realise that ... MIC jack and connected tape recorder but gets sapped away because ...
    namtip namtip January 2014 Hardware
  • Born again Speccy user with problemsHello all, Firstly I'd like to say a big hello - this is my first post! When I was 8 or 9 or so my dad bought a ZX Spectrum 48K and a whole bunch o…

    ... that mean? Looking at the circuit diagrams I can see no ... it anyway. Looking at the circuit diagram once more, I realise that ... MIC jack and connected tape recorder but gets sapped away because ... microphone input of a cassette recorder (usually with AGC) and ...
    Zorn Zorn January 2014 Hardware
  • ZX to EGA - it works !!I finally hooked up EGA monitor to ZX. Everybody can repeat if can hold the soldering iron in the arm. The circuit diagram is simple, it contains two…

    ... iron in the arm. The circuit diagram is simple, it contains two ... transistor. I can send the diagram by email if you need ...
    Konstantin Konstantin November 2001 Sinclair Miscellaneous
  • Building a light pen for a speccyI remember doing this when I was about 14 (Ages ago) It comprised of a light sensore, 9v battery, Preamp chip, jack plug and a few other sundries. …

    ... .

    Anyone have a circuit diagram (There were tonn's in ...
    Keith Coles Keith Coles April 2001 Sinclair Miscellaneous
  • +2a / +3 rgb csyncI want to separate the csync signal comming from the RGB port into vsync and hsync. Dose anyone have a circuit diagram, parts list etc of how to do t…

    I want to separate the csync signal comming from the RGB port into vsync and hsync. Dose anyone have a circuit diagram, parts list etc of how to do this?
    dasteph dasteph January 2004 Sinclair Miscellaneous
  • Heeeeeeeeeeeelp!!!I NEED the circuit diagram for the +3 PSU. I blew up a transistor trying to fit a drive B: last night :cry:

    I NEED the circuit diagram for the +3 PSU. I blew up a transistor trying to fit a drive B: last night :cry:
    guesser guesser September 2004 Sinclair Miscellaneous
  • spectrumIs there an actual electrical circuit diagram (not schematic) for the issue 6a motherboard?

    Is there an actual electrical circuit diagram (not schematic) for the issue 6a motherboard?
    guesser guesser October 2004 Sinclair Miscellaneous
  • PCW Spectrum PROM ProgrammerHi everyone, I?m looking for a (E)prom programmer circuit diagram that was published for the Spectrum in an old Popular Computing Weekly magazine fro…

    ... for a (E)prom programmer circuit diagram that was published for the ... 1985-87. I lost the diagram after several house moves over ... by someone who headed the diagram with "Tall Trees"?
    Any ...
    kgurd kgurd September 2006 Hardware
  • Mysteries of Electricity QuizA little fun quiz that I know the answers to, but may lead to some head scratching and disbelief, but there's easy experiments than can be performed …

    ... , if any?
    (google a circuit diagram of a car's electrics ...
    FrankT FrankT March 2007 Chit chat
  • 128 I/O portsIn The Spectrum Hardware Manual there is a small circuit on page 71/72 to allow 128 I/O ports by using IORQ+A7 to override IORQGE, so any I/O access …

    ...
    It says that the circuit cannot be used with an ... notice from the Interface 1 circuit diagram that it includes the ... 0. Would a similar circuit have the same effect:
    circuit:
    [code]
    +--+5v ...
    Jonathan Harston Jonathan Harston November 2007 Hardware
  • DRAM (:baffled:)Hi, Can someone explain to me the definitive rules on DRAM access times in terms of suitability for a particular speed of processor? Specifically, …

    ... what is shown on the circuit diagram as 200ns parts and work ...
    Phu Phu January 2008 Hardware
  • Spectrum 128 service manual.Hi, i have been looking at the speccy 128 service manual at [url]ftp://ftp.worldofspectrum.org/pub/sinclair/technical-docs/ZXSpectrum128K_Technical…

    ... />
    And it seems the circuit diagrams in the back are ... hold of a speccy 128 Circuit diagram or (for preference) a speccy ... +2 circuit (The original grey one)
    spodula spodula December 2008 Hardware
  • Pera Putnik's RGB interfaceI am sure some (if not many) of you will have seen Pera Putnik's RGB interface [URL="http://members.tripod.com/%7Epiters/uvyrgb.htm"]circuit diagram…

    ... .tripod.com/%7Epiters/uvyrgb.htm"]circuit diagram[/URL]

    I have ... was going to build the circuit for a "bit of fun ... I have one question :): His circuit diagram has pins E, C and ...
    szeliga szeliga April 2009 Hardware
  • Trying to help a ZX81 user[QUOTE=ZX81OAP at the ZX81 forum]I am looking for the name of a magazine that was mainly for computer projects. I started some improvements for the …

    ... name, or even perhaps the circuit diagram of these[/QUOTE]

    zxbruno zxbruno May 2009 Sinclair Miscellaneous
  • Spectrum Video Circuitry.Wotcha, I've looking at the circuit diagram of the speccy video circuitry (Hey, I'm snowed in, and theres only so much Civ IV i can stand :p), and I…

    ... , I've looking at the circuit diagram of the speccy video circuitry ...
    spodula spodula January 2010 Hardware
  • Personal Software magazineHere's a list of the type-ins for the issues of the Personal Software magazine already in the WOS archive. (Note: Some listings may have previously …

    ... ,Clyde Bish
    57-59,Circuit Diagram Sketch,G L Maynard
    c1541 c1541 February 2010 Support files
  • Wiring an antique phone.My colleagues have brought an antique brass candlestick telephone. The bloke the got it from assured them it had been converted for use on a BT line.…

    ... in this give me a circuit diagram to follow. what I need ...
    Scottie_uk Scottie_uk June 2011 Chit chat
  • Grey +2 video output and oddities.I've been experimenting with one of the above that I acquired years ago, but had just been buried at the back of a cupboard. I've connected it up to…

    ... look at the circuit diagram and inside my +2. The circuit diagram shows video ...
    Zorn Zorn January 2012 Hardware
  • Oric Atmos fixAnyone ever tried to fix that tape flaw that they shipped with? Heres an excerpt from somebody over at old-computers.com of someone who had; [QUOTE…

    ... by then the Oric-1 circuit diagram had been published in Oric ... User Magazine and comparing the diagram with what was actually in ...
    Macc Macc January 2012 Chit chat
  • 128k ULA pinout?Is there someone who has a circuit diagram or pinout for the 128k (+2) ULA?

    Is there someone who has a circuit diagram or pinout for the 128k (+2) ULA?
    Johan1973 Johan1973 August 2012 Hardware
  • +2 / +3 PSU Scematic...Hi all, Does the schematic / circuit diagram exist for the +2 / +3 PSU anywhere online ? Cheers. Phill.

    Hi all,

    Does the schematic / circuit diagram exist for the +2 / +3 PSU anywhere online ?

    Cheers.

    Phill.
    prime prime January 2013 Hardware
  • Correction of +2 hardware errorsThis is a collection of various pieces of information picked up from various places, including a lot from this forum. I have edited it and reworded i…

    ... generated sounds.

    The circuit diagram shows video output options called ...
    1024MAK 1024MAK January 2013 Hardware
  • New CPU and Spectranet oddity.I have no reason to suspect this problem is due to a fault/poor design of the Spectranet, but understanding what it does at system initialisation may…

    ... .

    Looking at the circuit diagram suggests that extra capacitance as ...
    Zorn Zorn June 2013 Hardware
  • 50 Hz / 60 Hz switch in Timex Computer 2068I'm not sure if this is common knowledge, I've certainly never read about it online, though it may be documented in Portuguese or Polish. There is a…

    ... . It's shown on the circuit diagram though it doesn't make ... connected to. On the printed circuit board, it's the jumper ... part of the SCLD oscillator circuit. So it's a capacitor ... standard part of the ZX81 circuit.

    All this makes ...
    rga24 rga24 July 2013 Hardware
  • Issue 4A repair attemptI think I need some help. I have a nice Issue 4A main board here, which does not give out any video signal. I checked some voltages (the ones that se…

    ... not able to read a circuit diagram :roll:

    I also ...
    schombi schombi July 2013 Hardware
  • ZX Spectrum Pre-regulator DesignCarrying on from the "[URL="http://www.worldofspectrum.org/forums/showthread.php?t=44486"]Issue 2 crashes after about 30 mins[/URL]" thread... [QUOT…

    ... Okay, been messing with a circuit simulator :razz:

    circuit. This is some extra ... /> Instead, the pre-regulator circuit helps out with the job ... /> Here is the provisional circuit diagram / schematic:[IMG]http://farm4.staticflickr ...
    1024MAK 1024MAK August 2013 Hardware
  • Interesting 48K failureI thought I'd recount a failure I've not seen mentioned before that I saw tonight while fixing a 48K issue 6 board. The background: The initial fail…

    ... of those. Looking at the circuit diagram, however, I formed a new ...
    Winston Winston December 2013 Hardware
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