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Search Again :: Adv Search 385 results in 0.000s
<1…78910111213>
  • +2A: issue 1 no sound but better picture than issue 4?Hello everyone. I have a slight problem here and I am trying to figure out what could be wrong. :-( I have two spectrum +2A with two board revision…

    ... really need access to an oscilloscope to check that the oscillator ...
    Renegade Renegade August 2014 Hardware
  • The ULA6C001E-5...Hi everybody, I have been continuing my Quest for the Holy ULA, and have today taken delivery of a ULA6C001E-5. Now, the -6 was used in Issue 3 boar…

    ... or chrominance signal on an oscilloscope and tune it for zero ...
    rga24 rga24 August 2014 Hardware
  • Burned finger temp on rubber 48k heatsink normal?Ok so i opened it up because a few keys started to act up and i noticed that after burning my hand the heatsink was that hot i could actually smell t…

    ... , as when viewed on an oscilloscope, it is the same as ...
    1024MAK 1024MAK August 2014 Hardware
  • Spectrum & ZX81 PSU Strange VoltagesHi all I've just refurbished my ZX spectrum PSU after i accidently broke one of the wires i soldered the joints to the PCB nicely and all seems to b…

    ... assume you'd need an oscilloscope for that, and aren't ...
    RobeeeJay RobeeeJay August 2014 Hardware
  • Faulty 48+ Help NeededHi, This is what I get when I plug in the spectrum, this is tuned in. Vid shows a reset. Any ideas, or pointers on the first thing to check. Keyboa…

    ... line, seenable only on an oscilloscope, not measurable by usual voltmeter ...
    HZJ HZJ September 2014 Hardware
  • Video fault on issue two ZX boardI've trawled the Internet and drawn a few blanks as to where to look to resolve the fault with my issue two board. I'm hoping a few of you knowledgea…

    Do you have an oscilloscope, or access to one?

    [I][B]Mark[/B][/I]
    1024MAK 1024MAK September 2014 Hardware
  • Video fault on issue two ZX boardI've trawled the Internet and drawn a few blanks as to where to look to resolve the fault with my issue two board. I'm hoping a few of you knowledgea…

    [QUOTE=1024MAK;790253]Do you have an oscilloscope, or access to one?

    [I][B]Mark[/B][/I][/QUOTE]

    I don't unfortunately. :(
    Wiggs Wiggs September 2014 Hardware
  • Issue 4s - Not 'Jailbars' but lines alloverIt's not another 'Jailbars' question!, but I've got this Issue 4S that aside from the 'Jailbars' on the Paper area of the screen which I can live wit…

    ... you can test with an oscilloscope.

    This is either ...
    1024MAK 1024MAK September 2014 Hardware
  • Issue 4s - Not 'Jailbars' but lines alloverIt's not another 'Jailbars' question!, but I've got this Issue 4S that aside from the 'Jailbars' on the Paper area of the screen which I can live wit…

    ... or have access to an oscilloscope, but are there any components ...
    retrogamemart retrogamemart September 2014 Hardware
  • Issue 4s - Not 'Jailbars' but lines alloverIt's not another 'Jailbars' question!, but I've got this Issue 4S that aside from the 'Jailbars' on the Paper area of the screen which I can live wit…

    ... you can test with an oscilloscope.

    This is either ...
    IanJ IanJ September 2014 Hardware
  • Issue 4s - Not 'Jailbars' but lines alloverIt's not another 'Jailbars' question!, but I've got this Issue 4S that aside from the 'Jailbars' on the Paper area of the screen which I can live wit…

    Nice one Ian :D

    I'm pretty much stuck with what else to try without an oscilloscope.

    Thanks

    Mart
    retrogamemart retrogamemart September 2014 Hardware
  • Possibly daft Harlequin composite question... :SHi; My Harlequin Rev. F works fine apart from one aspect: there's no composite out... :( I have checked continuity and the discrete components. I.…

    Do have access to an oscilloscope?

    [B][I]Mark[/I][/B]
    1024MAK 1024MAK September 2014 Hardware
  • Weird 1982 Copyright message after cap change.Hello All, As mentioned before I had a busted Issue 6 48K Spectrum+, one of the capacitors had leaked, and trashed the keyboard membrane ribbon. Us…

    ... , then you'd need an oscilloscope to progress any further I ...
    balford balford October 2014 Hardware
  • Weird 1982 Copyright message after cap change.Hello All, As mentioned before I had a busted Issue 6 48K Spectrum+, one of the capacitors had leaked, and trashed the keyboard membrane ribbon. Us…

    ... ;797861]you'd need an oscilloscope to progress any further I ... /pico-technology/picoscope-2204a-d2/oscilloscope-2ch-10mhz-100msps/dp/2432914 ...
    Korinel Korinel October 2014 Hardware
  • Weird 1982 Copyright message after cap change.Hello All, As mentioned before I had a busted Issue 6 48K Spectrum+, one of the capacitors had leaked, and trashed the keyboard membrane ribbon. Us…

    ... /pico-technology/picoscope-2204a-d2/oscilloscope-2ch-10mhz-100msps/dp/2432914 ...
    RobeeeJay RobeeeJay October 2014 Hardware
  • Problem with ZX Spectrum 128k +2B Tv Output and RGB imageHello, Last week I've been ofered with a ZX Spectrum 128k +2B but I have a problem with the tv out (through RF modulator) .The image is clear on the…

    ... you have access to an oscilloscope (any type will do for ...
    1024MAK 1024MAK November 2014 Hardware
  • 48K Upper memory issues?Having more issues with the 48K spectrum I just fixed that had the black screen in this thread [URL="http://www.worldofspectrum.org/forums/showthread…

    ... />
    Do you have an oscilloscope?

    Is the ULA ...
    1024MAK 1024MAK November 2014 Hardware
  • 48K Upper memory issues?Having more issues with the 48K spectrum I just fixed that had the black screen in this thread [URL="http://www.worldofspectrum.org/forums/showthread…

    ... all there)
    Unfortunately no Oscilloscope (used to have 2 at ...
    whoremoan whoremoan November 2014 Hardware
  • New multisystem floppy interface (spectrum 16Kb/+2A/CPC464)Dear all, I would like to show you my new extern floppy interface. Same interface can be used for both, CPC and Spectrum systems. CHARACTERISTICS …

    ... the logic chips with an oscilloscope, resetting the machine and cataloguing ...
    guesser guesser December 2014 Hardware
  • 48K Not booting properlyBought another faulty spectrum from Ebay. This one, when you turn it on, it looks like it's going to boot OK, but when it gets to the point where it…

    ... the upper RAM with an oscilloscope often reveals which is at ...
    Zorn Zorn January 2015 Hardware
  • The Spectrum Resuscitation ThreadKicking off this thread as a place where people who are fixing/restoring Spectrums (or indeed any other piece of related hardware) can show off their…

    ... /> Alternately if you have a oscilloscope, you can see the output ...
    1024MAK 1024MAK February 2015 Hardware
  • No display on a 128 toastrackHi All, I just bought a 128k off ebay with the usual, "it worked last time I used it", so I read into this "it does not work". True enough, it does n…

    [QUOTE=jagman5994;819656]Thanks for replying.
    .....
    Any more ideas anyone?[/QUOTE]
    Use an oscilloscope to check whether the correct sync pulses coming out of ULA.
    Boleslaw Jamroz Boleslaw Jamroz February 2015 Hardware
  • No display on a 128 toastrackHi All, I just bought a 128k off ebay with the usual, "it worked last time I used it", so I read into this "it does not work". True enough, it does n…

    ... =Boleslaw Jamroz;819657]Use an oscilloscope to check whether the correct ...
    jagman5994 jagman5994 February 2015 Hardware
  • No display on a 128 toastrackHi All, I just bought a 128k off ebay with the usual, "it worked last time I used it", so I read into this "it does not work". True enough, it does n…

    You really do need an oscilloscope and basic knowledge of how ...
    Zorn Zorn February 2015 Hardware
  • No display on a 128 toastrackHi All, I just bought a 128k off ebay with the usual, "it worked last time I used it", so I read into this "it does not work". True enough, it does n…

    ... ) and indirectly microprocessor.
    Without oscilloscope is not possible to check ...
    Boleslaw Jamroz Boleslaw Jamroz February 2015 Hardware
  • ZX Spectrum issue 6a - yellow border problem<p>Hello!</p><p>I have problem with my Sinclair ZX Spectrum issue 6A, 48K. </p><p>I have changed low memory (all 4116 IC's) and coil, all electrolyti…

    ... a logic probe or an oscilloscope test the clock input pin ...
    1024MAK 1024MAK May 2015 Hardware
  • ZX Spectrum issue 6a - yellow border problem<p>Hello!</p><p>I have problem with my Sinclair ZX Spectrum issue 6A, 48K. </p><p>I have changed low memory (all 4116 IC's) and coil, all electrolyti…

    @balfordChecked with 2 different working ROMs -> same result. Thanks.@1024MAKI will add reset and post result. I only have multimeter, but I think that I can find oscilloscope, and I will test clock on pin 6 of Z80. Thanks.
    zxuser zxuser May 2015 Hardware
  • ZX Spectrum issue 6a - yellow border problem<p>Hello!</p><p>I have problem with my Sinclair ZX Spectrum issue 6A, 48K. </p><p>I have changed low memory (all 4116 IC's) and coil, all electrolyti…

    ... if you could use an oscilloscope.)

    My recommendation: Check ...
    HZJ HZJ May 2015 Hardware
  • ZX Spectrum issue 6a - yellow border problem<p>Hello!</p><p>I have problem with my Sinclair ZX Spectrum issue 6A, 48K. </p><p>I have changed low memory (all 4116 IC's) and coil, all electrolyti…

    ... you don't have an oscilloscope, try measuring the voltage at ...
    HZJ HZJ May 2015 Hardware
  • ZX Spectrum issue 6a - yellow border problem<p>Hello!</p><p>I have problem with my Sinclair ZX Spectrum issue 6A, 48K. </p><p>I have changed low memory (all 4116 IC's) and coil, all electrolyti…

    ... />
    Do you have an oscilloscope?
    HZJ HZJ May 2015 Hardware
<1…78910111213>

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