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Search Again :: Adv Search 1000 results in 0.006s
<1234567…34>
  • Issue 3 board... How to resurrect?Dear Everyone, Now I have a working 48k Issue 3, a sort of working Speccy+ (still having problems with the keyboard, more of that in another post) a…

    ... voltages, starting with the PSU, the 5V, -5V and 12 V supplies. ... the power supply is faulty. It is always good ... 4116 chips on the faulty board and insert IC ... or more may be faulty. I then inset seven ... to establish which ones am faulty.

    Remember ...
    Pierre Pierre May 2013 Hardware
  • 128K +3 RepairHi guys, I need some help to diagnose a faulty 128k +3. The unit is completely unresponsive. I had tested the PSU and found odd values in it. …

    ... 937996"]
    PSU outputs +7.20 (on both 5v pins, which ... br />
    1. The PSU’s +5V rail is wonky. It cannot ... modest load. Sort out the PSU then.

    2. ... up, it could be a faulty component. If it’s ... it. It could be a faulty IC (ICs). There’s ...
    Ast_A_Moore Ast_A_Moore April 2018 Hardware
  • Good Home Wanted - Collect from B'Ham UKAny one here wish to call and collect a Sinclair Plus 2 (128k) working also Acorn Electron (psu faulty) and Acorn Plus 3 also Sanyo MSX. All welcome…

    ... (128k) working also Acorn Electron (psu faulty) and Acorn Plus 3 also ...
    kfasheldon kfasheldon November 2006 Sales
  • Broken ZX Spectrum + (48k)Hi! I just got a ZX Spectrum + from a friend. He said it was working around 8 years ago when he put it into the cellar. It was in great condition - …

    well, ULAs can go faulty in many ways as they' ... far more common, along with -5v power supply faults - the two ... together (well, lower RAM & -5v anyway, for obvious reasons)
    faulty -5v supply - this usually gives an ...
    GP GP December 2003 Sinclair Miscellaneous
  • How much power can I pull from a +3?Hi guys (and gals), Does anyone know how much of a load I can draw from the 5 volt line (lower pin 3of the expansion port)? I'm needing between 500…

    ... separate supply. Noise on the 5V supply could crash the spectrum ... /> Looking at my +2A PSU, the 5V supply can cope with up ...
    absorbentgnome absorbentgnome August 2005 Sinclair Miscellaneous
  • 5v Transformer.I've got a 5v 3A transformer, would this be ok to use with two 3.5 inch floppy drives?

    ... 178986]I've got a 5v 3A transformer, would this be ... want is for the PSU to deliver 5V only when it's ... drawn from it).

    PSU's that are not regulated ... you are sure that PSU is 5V off load as well ... your drives only use the 5V line as some older ones ...
    DEATH DEATH March 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 …

    ... . I hooked up an ATX PSU to a grey +2 once ... and connected the PSU's +5v to the original 5v regulators output pin ... an MB02 hooked up the PSU which also worked fine. And ...
    LaesQ LaesQ October 2007 Hardware
  • Alternative power supply for a +2B?Hi friends, On impulse, I recently bought a ZX Spectrum +2 (unit only, untested) on eBay, thinking that the cables (specifically the power supply) o…

    the CD32's PSU is +5v/+12v/-12v definitely needs to hack the (DC) socket...
    the C64's PSU is +5v/9v-AC not suitable for any speccy.


    chris
    xc8 xc8 December 2009 Hardware
  • +2 (Grey) and AT/ATX PSUAny ideas on the best way to power a grey +2 board from an AT or ATX PSU? Looking at the schematic, I could do this one of two ways... 1: Bypass th…

    ... you are using a PC PSU with +5V and +12V outputs, my ...
    1024MAK 1024MAK February 2013 Hardware
  • I've had better nights...So I got a broken issue 2 today, case in good nick but the diags board showing multiple failures in both lower/upper RAM. Never mind, good as a spare…

    ... derived from a more powerful PSU (the +5V and +12V capable of ...
    1024MAK 1024MAK November 2013 Hardware
  • +3 PSU fault, can it be repaired?First, i'm no electrical genius/engineer but can solder/de-solder when needed! Powered on my +3 today and the monitor was just flickering/breaking…

    ... light on it! Checked the PSU voltages first and the +/- 12v ... is OK but the +5v is showing +2.8v on ... pins, so I guess the PSU is faulty! Question is, is it ...
    BarryB BarryB November 2017 Hardware
  • what are exact current values on +2A's PSUI like to know what is written on an original +2A PSU nearby each voltage. I mean the current for +5V, the current for +12V and the current for -12V.…

    I like to know what is written on an original +2A PSU nearby each voltage.
    I mean the current for +5V, the current for +12V and the current for -12V.

    Thank you.
    Best wishes,
    Cristi
    secarica secarica January 2003 Sinclair Miscellaneous
  • +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. …

    ... where to get the +3 psu schematic? I'm trying to ... />
    The psu outputs 12V but not the 5V. As far as ...
    odious odious June 2006 Hardware
  • +3 PsuHi all, Just been digging at the back of my wardrobe, and found a +3 PSU the 12V+ and the 12V- works but not the 5V+ has any one got a diagram for a …

    Hi all,
    Just been digging at the back of my wardrobe, and found a +3 PSU the 12V+ and the 12V- works but not the 5V+ has any one got a diagram for a +3 PSU please.

    TIA
    swift240 swift240 June 2007 Hardware
  • Sinclair ZX 48K rubber keyed faultyI bought a faulty Sinclair ZX 48 K. Power on and the screen shows only 4 vertical white bars. Nothing other happend. I swapped the ULA and it is ok. …

    I bought a faulty Sinclair ZX 48 K. Power on and the screen shows only 4 vertical white bars. Nothing other happend. I swapped the ULA and it is ok. PSU is already ok.

    Any idea what's wrong?


    Micky
    -Micky -Micky January 2010 Hardware
  • 48K Speccy Repair Log.Some people may know my love for writing up my repairs of arcade PCBs on various forums so thought I would do the same for this little fella. Had th…

    ... each chip needs 12V, 5V and -5V and if the power ... These are the infamous half faulty DRAM chips, they are ... a large number of faulty chips rolled off the ... pain due to wiring and PSU requirements.

    ... to logic high, ie 5V, the resistor is a ...
    Womble Womble August 2010 Hardware
  • now lost the +5v from my +3 psuthe voltages i get from it are -12v +12v +0.61v what part needs replacing in the housebrick that is the PSU? having a bad weekend :-(

    the voltages i get from it are
    -12v
    +12v
    +0.61v

    what part needs replacing in the housebrick that is the PSU?

    having a bad weekend :-(
    reanimator reanimator May 2011 Hardware
  • 2 blown PSUs in one dayI got a SAM Coupe today, and the PSU started to smoke as soon as I turned it on. Since the Spectrum +3 PSU looked up to powering the SAM, I wired to…

    ...
    Since the Spectrum +3 PSU looked up to powering the ... to make me lose the 5V supply - my hastily constructed ... shorted one of the 5V pins to 12V, resulting ... why there wasn't 5V before I shorted the ... whether there may be other faulty components, or maybe it ...
    JohnH JohnH October 2011 Hardware
  • 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…

    ... I can now measure +5V at all the RAM chips ... as I measure for -5V on a working model) ... measure ~5.5Kohms to the +5V rail.

    Measurements ... .

    - WE is ~5V at all RAM chips (upper ... or perhaps a
    partially faulty CPU.

    Any ...
    Zorn Zorn November 2011 Hardware
  • +3 PSU fuseMy +3 burned a 1A250V fuse on PSU and no longer provide +5V (only +12 and -12V works). Now what can cause this? I was not using the disc drive and on…

    My +3 burned a 1A250V fuse on PSU and no longer provide +5V (only +12 and -12V works).
    Now what can cause this?
    I was not using the disc drive and only thing connected was a DivIDE.
    Encarnado Encarnado November 2011 Hardware
  • 48k PSU UpgradeCan anyone give the definitive word on a PSU upgrade (rather than just a replacement) for 48k machines? I'm thinking of adding at least an IDE inter…

    ... definitive word on a PSU upgrade (rather than just ...
    Using an AT/ATX PSU and regulating the 12v line ... s regulator and using the 5v line. I just need ... br /> Purchasing a beefy 9v PSU (2 or 3A) and using ... I should only need 5v internally although either way ...
    napoleonblownaparte napoleonblownaparte May 2012 Hardware
  • Faulty +2B and Odd PSU!?Just had a +2B come from eBay. It powers on fine (no LED though) and the keyboard works perfectly. No power to the tape deck though. This is the w…

    ... the weird bit. When the PSU is plugged in (I have ... mouse stops working. Unplug the PSU, and everything returns to normal ... it an issue with the PSU, and if so could it ...
    SimonLCFC SimonLCFC January 2013 Hardware
  • +2 (Grey) and AT/ATX PSUAny ideas on the best way to power a grey +2 board from an AT or ATX PSU? Looking at the schematic, I could do this one of two ways... 1: Bypass th…

    ... from an AT or ATX PSU?

    Looking at the ... the PL11 header) and supply +5v where 9v normally goes.
    5v to pins 2 and 3 ...
    napoleonblownaparte napoleonblownaparte February 2013 Hardware
  • Spectrum zx (faulty) games, joystick, tape playerSpectrum boots up but sticks on copyright screen - told this is a keyboard fault. Otherwise in good condition. All manuals (VGC) leads PSU etc Joys…

    ... .
    All manuals (VGC) leads PSU etc
    Joystick and interface ... /p/for-sale/sinclair-spectrum-faulty-tape-player-joystick-and-games ...
    Stevehaley Stevehaley March 2013 Sales
  • Speccy PSUI've grabbed a Speccy PSU from fleabay and it looks like a Speccy Plus PSU. After testing it with a multimeter it's kicking out 12V rather than the …

    I've grabbed a Speccy PSU from fleabay and it looks ... like a Speccy Plus PSU.

    After testing it ... or should I mark it faulty and pop it in my ...
    opless opless March 2013 Hardware
  • Spectrum +2A PSUI picked up a black +2A without a power supply. Looking on eBay the PSUs seem quite rare. The schematics for the PSU show +/-12 and 5v, would it be …

    ... /> The schematics for the PSU show +/-12 and 5v, would it be ... possible to convert another PSU to suit ... . Im thinking a small PSU from a micro ATX case ... />
    Has anyone got a PSU working that wasnt the original ...
    rune rune December 2013 Hardware
  • Powering a Spectrum with 5v?I live in the States, but I'm originally from England. My original Spectrum is still at my mum's house in the UK, and I was thinking of asking her t…

    ... it, because the original PSU won't work on mains ... is actually regulated down to 5v (and a lot of ... and inject a regulated 5v into where the voltage output ... was?

    Regulated 5v PSU's are everywhere, because that ... PAL input, so a 5v mod and a composite ...
    Jamesbeat Jamesbeat August 2014 Hardware
  • Modern PSUHello everyone, I'm looking for a modern PSU for my Spectrums and my dual set of 3.5'' floppy drive+HxC floppy emulator. The one for Spectrum should …

    ... 'm looking for a modern PSU for my Spectrums and my ... the dual set should be 5v @ 3A (2A should be enough ...
    geosiou geosiou October 2014 Hardware
  • 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…

    ... lucky to get a +2 PSU recently from a local car ... testing it. If the PSU is faulty could it damage the +2 ... />
    Should I open the PSU and have a look inside ...
    Track Track October 2014 Hardware
  • +2A PSUHi - I have a faulty PSU for the +2A.. managed to get the light on the speccy to come on with some fiddling of the wire - though wouldn't stay- so i …

    Hi - I have a faulty PSU for the +2A.. managed to ...
    retromad retromad December 2014 Sales
<1234567…34>

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  • now lost the +5v from my +3 psuthe voltages i get from it are<br /> -12v<br /> +12v<br /> +0.61v<br /> <br /> what part needs replacing in the housebrick that is the PSU?<br /> <br…
  • Faulty +2B and Odd PSU!?Just had a +2B come from eBay. It powers on fine (no LED though) and the keyboard works perfectly. No power to the tape deck though.<br /> <br /> T…
  • ZX Spectrum 48k PSU Vs ZX Spectrum 128k PSUHi Guys,<br /> A very straightforward and simple question :-). I am buying next days a ZX Spectrum 128k without PSU. I own already a ZX Spectrum 48k…
  • +3 PSU vs +2 PSUI'm referring here to the black +2's :)<br /> <br /> Now, a closer look shows the differences between the power supplies for these really is:<br />…
  • Faulty Keyboard membraneHello,<br /> <br /> My keyboard membrane of the 48K doesn'nt work anymore,<br /> Does anybody know how to get a new one ?<br /> <br /> Thanks,<br /> …
  • just got three 'faulty' speccys...off of eBay - and found they all work :)<br /> <br /> I was geared up with schematics and soldering irons as well, half hoping to have to get the 'sc…
  • what are exact current values on +2A's PSUI like to know what is written on an original +2A PSU nearby each voltage.<br /> I mean the current for +5V, the current for +12V and the current for…
  • Faulty Athena.tzx?I've downloaded both (48 and 128) versions of Athena in tzx format from the archive. I've tried loading them in Fuse for OS X, but after the encrypti…
  • Faulty Spectrum?PLease can somebody help<br /> have just bought a ZX Spectrum 48K<br /> And the Hobbit game, <br /> i cannot get this game to load it crashes right a…
  • Four faulty 48k Rubber Keyed Spectrums for SaleOkay, I've finally dug them out and decided to offer them on here, as when I mentioned them once before some people showed an interest.<br /> <br /> …

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