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Search Again :: Adv Search 1000 results in 0.149s
<1234567…34>
  • Pictures of 48k ZX Spectrums Showing the Important Voltages[SIZE=6][B]Pictures of 48k ZX Spectrums Showing the Important Voltages[/B][/SIZE] [URL="https://farm4.staticflickr.com/3841/15005543009_7bcf3b3031_o…

    ... /3841/15005543009_7bcf3b3031_o.jpg"][SIZE=5]First, a issue two board:[/SIZE]
    [IMG]https://farm4 ... chips, bottom left of the board) should be between +11V and ... made a sticky :D
    I will add some other issue boards ...
    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…

    ... with my issue two board. I'm hoping a few of ... have a working Spectrum 48k with a 3B board I've ... is all okay. The board features the spider or ... suggests it is a fairly early board from reading around.< ... anything similar sounding? Perhaps a fault on the LM1889N ...
    Wiggs Wiggs September 2014 Hardware
  • XP POWER SR10S05 will not fit on Issue Two in a rubber key caseSo, FOR SCIENCE I decided to see if an XP POWER SR10S05 would fit on my Issue Two board in a rubber key case. Especially since it seems to be *juuuu…

    ... would fit on my Issue Two board in a rubber key case. Especially ... because I have an Issue 3 48k which will ... have now put the Issue Two into the 48k+ hard ... key case that the Issue 3 came from.
    ... fit in a rubber key case on an Issue Two board (you ...
    Trafferth Trafferth September 2014 Hardware
  • Spectrum Issue two problemI managed to bring back to life a issue two spectrum (at least the power supply cirquit). The screen is now crystal clear (after replacing all the el…

    ... to bring back to life a issue two spectrum (at least the power ... boot really quickly compared to a healthy one and some keys ... should i try to replace first? Could it be the ROM ...
    gtsamour gtsamour December 2006 Hardware
  • Low speaker volume on a repaired issue two speccyI repaired an issue two speccy which was totally wrecked and missing many parts. I installed the missing parts (resistors, transistors) and replaced …

    ... according to the modification for issue two pcb (for better cirquit performance ... that i removed from an issue 3b board that i have for ... is much lower compared to a normal spectrum.
    Is ... installed OR could there be a larger value resistor somewhere than ...
    gtsamour gtsamour January 2007 Hardware
  • Issue 3 board with strange piggy-back boardIn case you are interested. I?ve never seen something like this before. I have an Issue 3 board here. When I opened the case and found a strange pig…

    ... />
    I have an Issue 3 board here. When I opened the ... case and found a strange piggy-back board. This one reads ... my amazement, when I connected a Cheetah 32K RAM expansion, Print ... 127?!?

    I uploaded two photos (with and without heatsink ...
    schombi schombi October 2013 Hardware
  • ZX Spectrum 48K board Issue Two - spider modI have a working Spectrum 48K Issue Two for sale on Amibay. It?s an early version with an ULA 5C102E and the "spider-mod" fitted. [URL="http://www.a…

    I have a working Spectrum 48K Issue Two for sale on Amibay. It?s an early version with an ULA 5C102E and the "spider-mod" fitted.

    [URL="http://www.amibay.com/showthread.php?t=57438"]http://www.amibay.com/showthread.php?t=57438[/URL]
    schombi schombi February 2014 Sales
  • doubt about swapping ULA in an issue 2 boardIs it possible to swap a 6C001E-6 ULA type with a 5C112E ? I have this issue 2 board that is not booting, it shows me a black border with horizont…

    ... a 5C112E ?

    I have this issue 2 board ... that is not booting, it shows me a ... is soldered, so I first would like to try swapping ... as I have another working issue 2 machine.
    < ... /> The broken machine has a transistor mod on the Z80 ...
    gleegum gleegum September 2020 Hardware
  • Issue two picture qualityDoes anyone know if issue two and earlier spectrums have worse picture quality (in general, beside colours) compared to issue 3 and later? I mean on…

    Does anyone know if issue two and earlier spectrums have ...
    I mean on both issue two speccys that i have, i ... faint vertical bars on a white paper and other ... with the sound when playing a game for example) that ... normal for this early issue. Also i want to ...
    gtsamour gtsamour January 2007 Hardware
  • Issue 2 Board - CPU 'Patch'I've been wondering why my issue 2 board has been kicking out this signal when powered up... [IMG]http://www.drumfu.com/ResizedDuffIssue2.jpg[/IMG] …

    ... 've been wondering why my issue 2 board has been kicking out ... .jpg[/IMG]

    Having a browse through the forums, I ... feeling this is symptomatic of a CPU fault.
    I've ...
    jp jp September 2008 Hardware
  • issue 2 board c34 getting hotHi All, Can anyone help with c34 getting hot very quickly? I`ve got an issue 2 board, there is no `buzz` from coil. yet the spectrum initalises to co…

    ... quickly? I`ve got an issue 2 board, there is no `buzz ... . the video output is either a yellowish screen or blue. I ... schematic and C34 is presumably a smoothing capacitor for the 5v ...
    adekav adekav March 2009 Hardware
  • Trying to fix Spectrum Issue TwoHello everybody, I bought from eBay three Spectrums - one is Issue Two and the other two are Issue 3. The Issues 3s look like they are working but t…

    ... Spectrums - one is Issue Two and the other two are Issue 3. The Issues ... they are working but the Issue Two not.

    So ... ]

    It's a transistor (ZTx313 connected to pins ... the underside expansion connector), and a resistor (1K).

    ...
    Valentin Valentin April 2010 Hardware
  • +2B/+3 flash boardsAfter a recent surge in demand there are now only three of these boards left* from the batch I had made. Once they're gone they're gone unless I can …

    ... commit to buying an issue 2 version. If ... a box of them cluttering the place up like with the first ... an unknown fault and two are being held ... hold out for a shiny new issue two board cause unless the ... remaining issue 1 boards ...
    guesser guesser November 2011 Sales
  • Issue 3 board - Free to good homeI have an issue 3 board that someone could scavenge for spares or even repair if they're willing to pay the p&p. I got it off someone on Amibay in a…

    I have an issue 3 board that someone could scavenge ... seller saying it had a keyboard fault, failing to ... some stage most likely a RAM had bought it, ... crap and implied it was a repairable machine.

    a (sort of verified working) ...
    napoleonblownaparte napoleonblownaparte August 2012 Sales
  • Component from a scrap 128K board neededHello, I'm in desperate search of the most left component shown in the following picture. (2115 8617X, probably only the 2115 number has to do with …

    ... find one from a scrap board.

    There are two of those ... (2115) on a 128K toastrack board ... /> Please, if someone has a scrap board and is willing to help ... is an equivalent on a +2 gray board but I'm not ...
    gtsamour gtsamour September 2012 Wanted
  • WANTED: ULA chip for Issue two SpectrumHello, I fired up my Issue Two ZX Spectrum a couple of weeks ago, and it seems my ULA chip is failing again. Has anyone got a spare working chip the…

    Hello,

    I fired up my Issue Two ZX Spectrum a couple of weeks ago, and it seems my ULA chip is failing again. Has anyone got a spare working chip they'd be willing to sell? Please PM me if you can help.

    Regards,

    Kamil
    kamilb1998 kamilb1998 February 2013 Wanted
  • Some problems with 2 ZX Specturm board'sHi, last week i got some ZX Spectrum stuff. Also 2 ZX Spectrum 48K's, one in the orginal case the anoter one in a DK'tronixs case. Both have problem'…

    ... case:
    It is a ISSUE 2 board, with composite mod i get ... noise is coming from the board.

    [IMG]http://img841 ... DK'Tronics case:
    First i got a very good picture, but ... .
    It is a ISSUE 3 board, and modded with a composite mod.
    Reinier Reinier November 2013 Hardware
  • New video about S-video modification on Issue two 48K Spectrum.I just finished an s-video modification on an Issue two 48K Spectrum so I made a video about it. Most of the technical details are in the video; if y…

    ... modification on an Issue two 48K Spectrum so I made a video about ...
    rga24 rga24 April 2014 Hardware
  • Which ULA to fit in which issue SpectrumI spent a little while studying the resistor changes on page 30 of the ZX Spectrum 48K service manual. They all concern aspects of the video circuit …

    ... to check which version your Issue two board is configured for is to ... red red) your board is configured for a 5C112E (or 5C102E ... (brown black orange) your board is configured for a 6C001E.


    R47 is a pull-down resistor for the ...
    rga24 rga24 April 2014 Hardware
  • 48K Issue 6A board only showing B/WI have a 48K Issue 6A board here, which only shows a B/W composite video signal on both, the modified RF-out, but also on the expansion bus (using my…

    I have a 48K Issue 6A board here, which only shows a B/W composite ... K-mouse turbo interface as a diagnostics tool). I suspected the ... to me on an issue 6A, but a 6C001E-7 shows exactly ...
    schombi schombi November 2014 Hardware
  • Issue Two 16K doesn?t like any keyboardI have a strange Issue Two 16K Spectrum here, that doesn?t like any keyboard. With the original keyboard fitted, it boots, but no key works. Okay, I …

    I have a strange Issue Two 16K Spectrum here, that doesn? ... . For test reasons I installed a +keyboard. Now the Spectrum boots ... again, but also not a single key working. What could ...
    schombi schombi January 2015 Hardware
  • Three Spectrum main boards (Issue Two, 3B and 4A)I will be offering three partially tested Spectrum main boards (Issue Two, 3B and 4A) on Ebay. All boot to the Sinclair (C) message. All fully popula…

    ... partially tested Spectrum main boards (Issue Two, 3B and 4A) on Ebay ... tonight, link to follow. Placing a bid should be no problem ...
    schombi schombi February 2015 Sales
  • Quirky nerdy hardware quiz time[b]Quirky nerdy hardware quiz time[/b] [list=1][*]How many transistors are on the issue one ZX Spectrum PCB? [color=#FFFFFF].[/color] [*]Which d…

    ... color=#FFFFFF].[/color]
    [*]On a ZX Spectrum 16k/48k/+ computer ... s special about the ZX81 issue two board?
    [color=#FFFFFF].[/ ... can name the channel owners first name.
    [color=# ... ]

    Answers on a postcard to “Sinclair Research Ltd ...
    1024MAK 1024MAK December 2020 Sinclair Miscellaneous
  • Spectrum Issue two problemI managed to bring back to life a issue two spectrum (at least the power supply cirquit). The screen is now crystal clear (after replacing all the el…

    ... .
    I don't have a measuring instrument so i will ... is an issue two board :) and because it was badly damaged at first.
    gtsamour gtsamour January 2007 Hardware
  • 128k heat sink - ULA problems and a hintHello, I had two ZX Spectrum 128k with a similar behaviour. One item worked only a short time after switching on and then there were increasing RAM …

    ... hot heat sink. So first job is to reduce ... problem so its not a general issue and he should ... amp) on a little daughter board may be a good replacement ... on an issue two board. Feeding the Spectrum with a regulated 8. ... wouldn't be an issue on a 128K machine, it ...
    BloodBaz BloodBaz January 2009 Hardware
  • Flicker fixer for ZX 48KHas anyone the schematics for the flicker fixer: [URL]http://8bit.yarek.pl/computer/zx.48/[/URL] Micky

    ... OK with a 4A issue board and a SGS brand Z80-A).
    A piece of ... the board with the component side facing you. Locate these two points ... of actual mod tested on a issue 4A board.

    [B]PICTURE ... . One of the cuts (the first one) is visible in the ...
    mcleod_ideafix mcleod_ideafix April 2010 Hardware
  • Spectrum +3' AY sound issuesHi everyone - first time poster. I just got a Spectrum +3 for Xmas, and I am over the moon at this - I used to write games which I have here on 3" d…

    ... ;505835]Except both the ISSUE 1 and ISSUE 2 motherboards have the ... first ones though.

    What is the difference between a +3 issue ... one and issue two board ? :)
    spider spider January 2011 Hardware
  • Spectrum +3' AY sound issuesHi everyone - first time poster. I just got a Spectrum +3 for Xmas, and I am over the moon at this - I used to write games which I have here on 3" d…

    ... first ones though.

    What is the difference between a +3 issue ... one and issue two board ? :)[/QUOTE]

    Issue one has a ... is issue 1, and given that I got my first one ... reckon that probably was an issue 1 as well. The ...
    Alien 8 Alien 8 January 2011 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 …

    ... I used the PSU board out of the PSU case ... case with one or two power supplies. I ... setup I have a Spectrum Issue two board with a floppy disk drive ... initialised. It is a timing issue. In my case ... the floppy drives should be powered on first ...
    Pierre Pierre October 2014 Hardware
  • Quirky nerdy hardware quiz time[b]Quirky nerdy hardware quiz time[/b] [list=1][*]How many transistors are on the issue one ZX Spectrum PCB? [color=#FFFFFF].[/color] [*]Which d…

    ... was first. Well done :D Bonus points to McKlaud for saying issue ... Spectrum Computing forums was first. He also gets a bonus point for ... ’s special about the ZX81 issue two board? [b]The answer is [color ... (via PM) was first. Well done :D Half a point if you ...
    1024MAK 1024MAK December 2020 Sinclair Miscellaneous
<1234567…34>

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