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Search Again :: Adv Search 1000 results in 0.002s
<1…16171819202122…34>
  • +3 No power LED, disc motor continually spinning..and no display. I searched the posts and i found a really old thread going back to 2004 where fuses in the psu were discussed, checked em in this an…

    If you measure the voltages on the PSU now what ... and re-measure. If the voltages have returned then it looks ...
    guesser guesser December 2011 Hardware
  • +3 No power LED, disc motor continually spinning..and no display. I searched the posts and i found a really old thread going back to 2004 where fuses in the psu were discussed, checked em in this an…

    ... 't ever have any dangerous voltages on it. The issue with ... places to test the output voltages.
    guesser guesser December 2011 Hardware
  • +3 No power LED, disc motor continually spinning..and no display. I searched the posts and i found a really old thread going back to 2004 where fuses in the psu were discussed, checked em in this an…

    ... etc. you can measure the voltages relative to any of those ...
    guesser guesser December 2011 Hardware
  • +3 No power LED, disc motor continually spinning..and no display. I searched the posts and i found a really old thread going back to 2004 where fuses in the psu were discussed, checked em in this an…

    ... and you can measure the voltages to be sure it's ...
    guesser guesser 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…

    ... D11, and after that all voltages were OK. Faint vertical bars ...
    roko roko 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 …

    ... working and whether the various voltages it produces are present where ...
    Zorn Zorn December 2011 Hardware
  • 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 …

    Did you measure the voltages?
    I myself had a period with problem that only ended by moving 30 cm away from the CRT telly.
    roko roko December 2011 Hardware
  • 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 …

    My mistake, sorry, ive measured "correctly now"

    REG1 10v, 0v, 20v
    REG2 14v, 5v, 3.8v

    All voltages to the drive are as written on the PCB
    Macc Macc December 2011 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…

    ... what to do if these voltages are wrong but Im assuming ...
    Winston Winston December 2011 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 transistor is changed the voltages should all be as per ...
    Marshall Marshall December 2011 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…

    ... =Marshall;590911]The first two voltages are correct on my machine ... what to do if these voltages are wrong but Im assuming ...
    roko roko December 2011 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…

    ... board and have been comparing voltages between those and the faulty ... to report back with the voltages when its been changed. Im ...
    Marshall Marshall December 2011 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 new ZTX651 and the voltages are
    Pin 8 12volts ...
    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…

    ... hard to detect as the voltages are close.
    Should this ...
    roko roko January 2012 Hardware
  • Problem with ZX Spectrum (B&W stripes)Hello. I bought a ZX Spectrum, and fortunately, it arrived today. Unfortunately, when I connected it to my TV, this appeared... [IMG]http://i.imgur.…

    ... without being able to inspect voltages and signals on the board ...
    Zorn Zorn January 2012 Hardware
  • 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…

    ... have to switch three separate voltages, and it will leave your ...
    guesser guesser 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…

    ... , but check all the supply voltages for them are present 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…

    It can be Z80 fault due to connecting external interfaces.
    Try to measure all voltages. In such cases multiple faults may exist.
    kpuchatek kpuchatek February 2012 Hardware
  • Broken +2 (Grey), need helpHello, I got a broken +2, and as I have tons of them working, I want to repair it without fear :D When I power up the machine the I see a horizontal…

    Check all the voltages are right.
    LCD LCD February 2012 Hardware
  • Broken +2 (Grey), need helpHello, I got a broken +2, and as I have tons of them working, I want to repair it without fear :D When I power up the machine the I see a horizontal…

    Hello
    [QUOTE=LCD;601221]Check all the voltages are right.[/QUOTE]

    I have the same feeling. What power supply are you using?Do you have another one?

    Bye

    Jos? Leandro
    Jose_Leandro Jose_Leandro 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…

    ... being sure the power supply voltages are all correct, any working ...
    Zorn Zorn February 2012 Hardware
  • Just bought a +3 and i think it's broken :(Please help... my spectrum +3 arrived today and I plugged it in, the red light came on and the disk drive made a little noise. So I then set the T…

    ... by checking all the expected voltages are present where they are ...
    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…

    Those voltages are all correct, so the converter circuit must be working. That doesn't mean all the 4116 ICs are though.
    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…

    [QUOTE=Zorn;602134]Those voltages are all correct, so the converter circuit must be working. That doesn't mean all the 4116 ICs are though.[/QUOTE]

    I have bought 8 4116 ICs so will replace them when they arrive and go from there.
    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…

    ... by A0 (that later becomes TR6) and is there due to ...
    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…

    ... by A0 (that later becomes TR6) and is there due to ...
    kamilb1998 kamilb1998 February 2012 Hardware
  • 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 …

    ... to need some measurements of voltages and signals inside to diagnose ...
    Zorn Zorn February 2012 Hardware
  • 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 …

    ... it up, is to check voltages. Easiest place is on pins ... don't proceed before those voltages are back in place! These ... are very sensitive to missing voltages. When -5 and/or +12 ... dying too.

    With voltages OK, I check the ULA ...
    RetroTechie RetroTechie February 2012 Hardware
  • 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 …

    ... it up, is to check voltages. Easiest place is on pins ... don't proceed before those voltages are back in place! These ... are very sensitive to missing voltages. When -5 and/or +12 ... dying too.

    With voltages OK, I check the ULA ...
    dynaflux dynaflux February 2012 Hardware
  • 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 …

    ... too lazy for that ;-) ). Btw: voltages OK? Upper 32K removed?
    RetroTechie RetroTechie February 2012 Hardware
<1…16171819202122…34>

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