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<1…15161718192021…34>
  • 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…

    ... also changed all the electrolytic capacitors on this board because it ...
    Zorn Zorn December 2011 Hardware
  • Issue 2 voltage troubleDear all, I got my hands on an old issue 2 from a friend. Price was close to zero so I did not hesitate to take it. After powering it up I was sur…

    ... out.
    Of course electrolitic capacitors can leak DC too, check ...
    roko roko December 2011 Hardware
  • Spectrum+ problemsI was testing my other Spectrum+ in order to sell and discovered that some of the keys weren't working. No problem, I said, I have a spare Spectrum+ …

    ... after changing all the electrolytic capacitors on the board (which also ...
    Zorn Zorn December 2011 Hardware
  • BBC Model B, Tape Deck & GamesNeed to offload my BBC, with games and books. Financial reasons unfortunately, but I refuse point blank to let my ANY of my Speccy stuff go, so gues…

    ... /> Faulty BBC B (with new capacitors for PSU) - ?15
    Jet ...
    TechnicianSi TechnicianSi December 2011 Sales
  • Opus Discovery issues!All happens at once when things go wrong eh? This time its the dual drive Opus, neither drive will read/write, motor spins, when formatting you can …

    It's also worth replacing the old capacitors and the regulator in the PSU, just to be on the safe side.
    Pilsener Pilsener December 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…

    ... suspects: crappy power supply / bypass capacitors, transistor inverter, and use of ...
    RetroTechie RetroTechie December 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…

    ... suspects: crappy power supply / bypass capacitors, transistor inverter, and use of ...
    Zorn Zorn December 2011 Hardware
  • faultyi have a zx48 that will not tune in it allways seems to be just out of tune what could cause this fault also half of the keyboard doesnot work there …

    i have done nothing but the previous mod if you are saying it could be ram puts me back to the original fault with the blown capacitors
    ozzyzx ozzyzx December 2011 Hardware
  • faultyi have a zx48 that will not tune in it allways seems to be just out of tune what could cause this fault also half of the keyboard doesnot work there …

    You hadn't said anything about failed capacitors before. Did you replace them (and possibly try to determine why they had failed)? I wouldn't have even switched it on if not as it could possibly cause further damage.
    Zorn Zorn December 2011 Hardware
  • Repairing another Issue 2 48K Spectrum.I said at the start of the other thread that I've got another one of these and I've started investigating it. The board is more-or-less exactly the …

    ... check the other diodes and capacitors. I'll also spend a ...
    Zorn Zorn December 2011 Hardware
  • 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?

    ... resistors, and a pair of capacitors. Add a CANON DB9 socket ...
    mcleod_ideafix mcleod_ideafix December 2011 Hardware
  • Where can I get the +d PCB files?Where can I get the +d PCB files? I mean this one: [url]http://www.worldofspectrum.org/NotThePlusD[/url] Micky

    Why did they not use the +5 volts from the Spectrum edge connector? Instead the 9 volt from the Spectrum and a 7805 and some capacitors.


    Micky
    -Micky -Micky January 2012 Hardware
  • Where can I get the +d PCB files?Where can I get the +d PCB files? I mean this one: [url]http://www.worldofspectrum.org/NotThePlusD[/url] Micky

    ... between both circuits. A few capacitors are needed anyway. Often a ... number of capacitors are scattered around on the ...
    roko roko January 2012 Hardware
  • 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…

    ... a stable reading, due to capacitors loading. If meter has a ...
    roko roko January 2012 Hardware
  • 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…

    ... the board. The 47nF decoupling capacitors used in some Spectrums have ...
    Zorn Zorn January 2012 Hardware
  • 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…

    ... also replaced the electrolytic capacitors on the board? In ... electronic equipment, especially electrolytic capacitors. In particular, problems with ... polarity when removing the capacitors. On the Issue ... />
    Axial electrolytic capacitors aren't so common now ...
    Zorn Zorn January 2012 Hardware
  • Faulty Interface one, IF1Dear all, as I have already mentioned in a different thread my IF1 stopped working for no special reason. I went through the service manual and chec…

    I'd check the (electrolytic) capacitors, if there are any.
    orange orange January 2012 Hardware
  • 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…

    ... also replaced the electrolytic capacitors on the board? In ... electronic equipment, especially electrolytic capacitors. In particular, problems with ... polarity when removing the capacitors. On the Issue ... />
    Axial electrolytic capacitors aren't so common now ...
    Marshall Marshall January 2012 Hardware
  • 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…

    ... 't yet, replace the electrolytic capacitors that are related to the ...
    Zorn Zorn January 2012 Hardware
  • Should I sell a boxed ZX128 as original as possible?Normally I add stereo audio to all 128K ZX Spectrums I get my hands on. At this moment I have a couple boxed heatsink models waiting to be offered o…

    ... 't forget to solder the capacitors pin to the emitter of ...
    ingo ingo January 2012 Sales
  • Making a Zx Spectrum betterIs there anyway to make my Grey ZX Spectrum more power efficient and more reliable from the original you get. What I mean is we all know the ZX Spec…

    ... modifications.. :)

    Replace electrolytic capacitors with good quality fresh ones ...
    gtsamour gtsamour January 2012 Hardware
  • Repairing another Issue 2 48K Spectrum.I said at the start of the other thread that I've got another one of these and I've started investigating it. The board is more-or-less exactly the …

    ... replaced (and all the electrolytic capacitors while at it), all the ...
    Zorn Zorn January 2012 Hardware
  • Colour blocks on displayHi all, I have just acquired another Sinclair product, my first one being a C5, it's a 48K ZX Spectrum. It shows colour blocks on the display when p…

    ... also recommended. All the electrolytic capacitors look like originals and so ...
    Zorn Zorn February 2012 Hardware
  • Colour blocks on displayHi all, I have just acquired another Sinclair product, my first one being a C5, it's a 48K ZX Spectrum. It shows colour blocks on the display when p…

    ... recommend you replace the electrolytic capacitors while you're working on ...
    Zorn Zorn February 2012 Hardware
  • Colour blocks on displayHi all, I have just acquired another Sinclair product, my first one being a C5, it's a 48K ZX Spectrum. It shows colour blocks on the display when p…

    ... thread, change all the elctrolytic capacitors and TR4/TR5 chips as ...
    kamilb1998 kamilb1998 February 2012 Hardware
  • Spectrum 48K - upper memory MIAI have recently acquired a ZX Spectrum which, according to the sticker on the bottom, should be a 48K model. It's an Issue 3 board, with upper memory…

    ... or one of the two capacitors responsible for the RAS and ...
    Zorn Zorn February 2012 Hardware
  • Colour blocks on displayHi all, I have just acquired another Sinclair product, my first one being a C5, it's a 48K ZX Spectrum. It shows colour blocks on the display when p…

    ... need to replace the little capacitors above and below IC6-IC13 ...
    kamilb1998 kamilb1998 February 2012 Hardware
  • Colour blocks on displayHi all, I have just acquired another Sinclair product, my first one being a C5, it's a 48K ZX Spectrum. It shows colour blocks on the display when p…

    ...
    Replace all the electrolytic capacitors on the board (and change ... The little 47nF decoupling capacitors are unlikely to have ... some varieties of these small capacitors (and they look like ... in case. Ceramic 47nF capacitors would be appropriate. Slip ...
    Zorn Zorn February 2012 Hardware
  • ferguson rgb convertornever seen one of these before, anyone ever had/seen one? [IMG]https://fbcdn-sphotos-a.akamaihd.net/hphotos-ak-ash4/409476_378468625503597_100000213…

    ... possibly with some resistors and capacitors to adapt levels and remove ...
    ingo ingo February 2012 Hardware
  • Colour blocks on displayHi all, I have just acquired another Sinclair product, my first one being a C5, it's a 48K ZX Spectrum. It shows colour blocks on the display when p…

    ... it does, replace the electrolytic capacitors anyway. It's not highly ...
    Zorn Zorn February 2012 Hardware
<1…15161718192021…34>

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