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Search Again :: Adv Search 1000 results in 0.003s
<1234567…34>
  • ZX Spectrum not working... issue 4S?Hi, I've bought a "new" broken ZX Spectrum +. The idea was to put an harlequin board inside, but for the moment I'm trying to put it in working order…

    ... says it is an Issue 4S.
    - The computer had been ... I'll try first changing TR4, TR5, C44 and C45 (as ... blown as well?
    - Issue 4S? In WOS docs there are ... 've never head about Issue 4S.
    Zup Zup February 2012 Hardware
  • Issue 4S users... I need your help!Short story: Issue 4S spectrum don't work. TR4 seems to have pins at different places from other speccys (BCE versus EBC), and usual replacement part…

    Short story: Issue 4S spectrum don't work. TR4 seems to have pins ... transistors have this boards at TR4 and TR5, as they seems ...
    Zup Zup March 2012 Hardware
  • Issue 4S Schematics and DC-DC circuitA while ago I bought a Spectrum 4S that had problems tuning. I removed the RF tuner as I was not going to use it and did the composite mod. It worked…

    ... ago I bought a Spectrum 4S that had problems tuning. I ... was very noisy. Then suddenly TR4 blew up, and I am ... not 100% correct for the 4S, which makes it a bit ... have specific schematics for the 4S?

    I currently ... zx a mere seconds before TR4 blows.
    Johan1973 Johan1973 June 2012 Hardware
  • TR4/TR5 replacementHi guys, I've got another Spectrum I'm working on now - an Issue 4S this time. When I originally got it, I powered it up and did the basic tests a…

    ... working on now - an Issue 4S this time.

    TR4. Looking at all the ... board. Photos show that TR4 should be installed in ... ]

    Issue 4S online:
    [url]http:// ... br /> I've since replaced TR4 (marked ZTX650) with a new ...
    Tekno Venus Tekno Venus February 2015 Hardware
  • Spectrum issue 4SI have an almost completely depopulated issue 4s board. Wondering what to do, repairs or spares? I hooked it up and the voltages are off, 5v is fi…

    ... an almost completely depopulated issue 4s board. Wondering what to do ... to find these?

    TR4 and TR5 are fine and ...
    patzik patzik August 2016 Hardware
  • ZX Spectrum Issue 4S composite video fuzzy (horizontal blur)Dear people of WoS, Thank you very much for taking the time to read. I have an Issue 4S I recently acquired and planned to fix up as a gift for a…

    ... read. I have an Issue 4S I recently acquired and planned ... component swapping:
    - TR1, TR2, TR4, TR8, TR9
    - IC 14 ...
    handsfelloff handsfelloff January 2018 Hardware
  • Spectrum issue 4S ??? What is that?I recieved a spectrum 48k today that i bought from Ebay (rubber). I opened it up and to my surprise it was an Issue 4S, yes 4S!!! I didn't know there…

    ... surprise it was an Issue 4S, yes 4S!!!
    I didn't ... know how can an issue 4S exist?
    gtsamour gtsamour February 2007 Hardware
  • TIPP31 transistor questionYesterday I had the time to try and repair a 4S issue 48k spectrum I had. First of all I replaced all the electrolytic capacitors. The tr4 transistor…

    ... to try and repair a 4S issue 48k spectrum I had ... the electrolytic capacitors.
    The tr4 transistor was totally burnt so ... transistor which on that issue (4S) was fitted without any rearrangement ... working fine, the TIPP31 transistor (tr4) is getting hot, not ...
    gtsamour gtsamour May 2007 Hardware
  • Spectrum Issue 4SI bought a speccy 48k off of eBay. Looking inside it has an Issue 4S board. But I cannot find evidence that the 4S was ever issued inside the rubber …

    ... inside it has an Issue 4S board. But I cannot find ... evidence that the 4S was ever issued inside the ... speccy but mine definitely says 4S.

    I have only ... seen the Spectrum+ with the 4S inside. Is this a frankenstien ...
    NotCliveSinclair NotCliveSinclair April 2008 Hardware
  • Speccy 48In my messing around with hardware, I have managed to nacker a Speccy 48 board. Specifically, i have managed to mess up the power inverter section. …

    ... be marked (C) 1983 Issue 4S, (Yes, "S")
    In the ... Issue 4A, but not a 4S, the layout, and specifically the ... (Labelled C79), a very large TR4 (Labelled C2235A), and TR5 turned ...
    spodula spodula October 2008 Hardware
  • issue 4s for reapirHi All, This time I have issue 4s for repair :) Here is few screen shots and small movie after boot. [url]http://forest.no-ip.org/issue4s/[/url] I kn…

    ... /> This time I have issue 4s for repair :)
    Here is ... /> And what is this issue 4s ? what schematics to look ?
    gorski gorski June 2009 Hardware
  • Spectrum +2's and TR4...?Hi people, I saw mentioned in another thread (+2 composite mods) that TR4 is the wrong way round on grey +2's. Can someone give me more info on this…

    ... thread (+2 composite mods) that TR4 is the wrong way round ...
    Spirantho Spirantho April 2011 Hardware
  • TR4 is goneMy TR4 transistor is burned. Can I replace this transistor with a TIP31B or C ? My 4116 RAM ic?s are showing +0.05V, +5V and +8.49V... :) My Spectru…

    My TR4 transistor is burned.
    Can ... ?

    Could be the TR4 the problem of colour, too ...
    Turrican Turrican April 2012 Hardware
  • Help changing TR4 and TR5Hi all! Please, help me! :) I think I'm not understanding the correct pins of TR4/TR5 and the transistors. So, if anyone know the correct pins, help …

    ... understanding the correct pins of TR4/TR5 and the transistors.
    TR4/TR5.
    And I found ... original pins that?

    TR4 TR5 TR4 TR5

    E ...
    Turrican Turrican April 2012 Hardware
  • Spectrum 48k Issue 4S?I just recieved a Spectrum 48K that had the bottom case from an issue 1 and the top half from a later issue, and the main board is 1983 Issue 4S. I a…

    I just recieved a Spectrum 48K that had the bottom case from an issue 1 and the top half from a later issue, and the main board is 1983 Issue 4S. I am curious in what way it differs, as there are no schematic for issue 4S on this site.
    Johan1973 Johan1973 April 2012 Hardware
  • TR4 continues blowing up!The TR4 of my Speccy Issue 3 continues burning even after I changed all electrolytic capacitors and the BA157 diode. If these things serve only to h…

    The TR4 of my Speccy Issue 3 ...
    Turrican Turrican May 2012 Hardware
  • ZX 48 issue 4S no s-video possible?No s-video on ZX 48 issue 4S possible? I have had this mod on my issue 4A. But this did not work with my 4S. On C65 is no chrominance signal. Here …

    ... -video on ZX 48 issue 4S possible? I have had this ... did not work with my 4S. On C65 is no chrominance ...
    -Micky -Micky August 2012 Hardware
  • For sale: ZX Spectrum 48K Issue 4SI have a fully restored (and with all chips socketed) ZX 48K Issue 4S, that I am told is a bit of a rarity, that I am willing to sell. Dont know what…

    ... chips socketed) ZX 48K Issue 4S, that I am told is ...
    Johan1973 Johan1973 November 2012 Sales
  • Pimping an Issue 4SSo theres this 4S I have, its been a pain in the backside for ages, this and that going wrong then I stupidly broke it properly by inserting a keyles…

    So theres this 4S I have, its been a ...
    Macc Macc July 2013 Hardware
  • Issue 4S display improvementsHi all, I'd noticed that the display (via modded composite out) of the Issue 4S I repaired a while back (details [URL="http://www.worldofspectrum.or…

    ... composite out) of the Issue 4S I repaired a while back ... /> So if you have a 4S, this looks like a worthwhile ...
    balford balford September 2013 Hardware
  • Issue 4S differencesI decided to buy an Issue 4S PCB after reading much about them on here. It was originally in a plus case which didn't come in the sale. I've been run…

    ... decided to buy an Issue 4S PCB after reading much about ... actually different about the Issue 4S. Is it closest to Issue ... is with using the Issue 4S with Divide. So far it ... 't implemented properly on Issue 4S. Is this likely to be ...
    rga24 rga24 May 2014 Hardware
  • Issue 4S bad M1Never ever seen a 4S with a bad M1 line before today [url=http://postimg.org/image/o2yrigdb1/][img]http://s14.postimg.org/o2yrigdb1/IMG_1291.jpg[/img…

    Never ever seen a 4S with a bad M1 line before today
    [url=http://postimg.org/image/o2yrigdb1/][img]http://s14.postimg.org/o2yrigdb1/IMG_1291.jpg[/img][/url]

    But it is!
    Macc Macc May 2014 Hardware
  • TR4 or TR5?My issue two gives horizontal bars on bootup. Flicking reset takes it to copyright screen though. I measured voltages and got 4,9V, 11,99V and -4,3V.…

    ... of threshold but was it TR4 or TR5 that needs changing ...
    protek protek May 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…

    ... I've got this Issue 4S that aside from the 'Jailbars ... is something specific to the 4S or if anyone else has ...
    retrogamemart retrogamemart September 2014 Hardware
  • Tr5 tr4I need to replace tr4 and tr5... What arr the fine replacement equivalent? I see the sinclair logo copyright but is distorted and in two line... Ca…

    I need to replace tr4 and tr5... What arr the fine replacement equivalent?
    I see the sinclair logo copyright but is distorted and in two line... Can everyone help me? Is a zx spectrum+ iussue 4b
    Thaks
    Puglisia Puglisia May 2015 Hardware
  • 12V Rail - Spectrum 48kOkay - I may just be having a senior moment here, but I'm running out of ideas. I'm working on a Spectrum Issue 4S board,and have had to remove al…

    ... working on a Spectrum Issue 4S board,and have had to ... the RAM with sockets, replaced TR4 and TR5 (C2236 and A733 ...
    Graham Graham November 2015 Hardware
  • Character wobbleHello, I have an Issue 2 board which shows vertical character wobble. This happens for a few minutes followed by a few minutes of character sta…

    ... had the effect of destroying TR4 and causing the
    -5V ... to rise to 20V once TR4 was replaced.

    All ... issue 2 and two Issue 4S ones). None of these
    roganjosh roganjosh December 2017 Hardware
  • help with issue 3 48k speccy after recap and new tr4 and tr5I have a 48K speccy that was not working. After recapping and replacing TR4 and TR5 it came back to life However after a short while running weird …

    ... .
    After recapping and replacing TR4 and TR5 it came back ...
    redfiat redfiat July 2018 Hardware
  • Help request for an injured Issue 4A spectrumHi folks, I'm hoping to resurrect an issue 4A spectrum that has been in my hoard for a couple of decades since buying it for spares. Someone ha…

    ... know), tested and replaced faulty TR4 TR5 and the 9v regulator ... /> I also had a damaged 4S, which i've managed to ...
    eccles eccles January 2020 Hardware
  • upper ram tacks / TR4 socket...[url="https://photos.app.goo.gl/MkqzRCuNCV3EPr9E7"]https://photos.app.goo.gl/MkqzRCuNCV3EPr9E7[/url] you can only replace that pesky TR4 so many t…

    ... can only replace that pesky TR4 so many times .... surprises me ... that with TR4 not in place or when ...
    mark8bit mark8bit September 2020 Hardware
<1234567…34>

Latest Posts

  • I am currently watching.....
    Paradigm Shifter on 12:49AM
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    harriusherbartio on April 21
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    harriusherbartio on April 21
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Related Threads

  • Spectrum issue 4S ??? What is that?I recieved a spectrum 48k today that i bought from Ebay (rubber).<br /> I opened it up and to my surprise it was an Issue 4S, yes 4S!!!<br /> I didn'…
  • Spectrum Issue 4SI bought a speccy 48k off of eBay. Looking inside it has an Issue 4S board. But I cannot find evidence that the 4S was ever issued inside the rubber …
  • issue 4s for reapirHi All,<br /> This time I have issue 4s for repair :)<br /> Here is few screen shots and small movie after boot.<br /> [url]http://forest.no-ip.org/i…
  • Spectrum +2's and TR4...?Hi people,<br /> <br /> I saw mentioned in another thread (+2 composite mods) that TR4 is the wrong way round on grey +2's. Can someone give me more …
  • ZX Spectrum not working... issue 4S?Hi, I've bought a "new" broken ZX Spectrum +. The idea was to put an harlequin board inside, but for the moment I'm trying to put it in working order…
  • Issue 4S users... I need your help!Short story: Issue 4S spectrum don't work. TR4 seems to have pins at different places from other speccys (BCE versus EBC), and usual replacement part…
  • TR4 is goneMy TR4 transistor is burned.<br /> Can I replace this transistor with a TIP31B or C ?<br /> My 4116 RAM ic?s are showing +0.05V, +5V and +8.49V... :)…
  • Help changing TR4 and TR5Hi all!<br /> Please, help me! :)<br /> I think I'm not understanding the correct pins of TR4/TR5 and the transistors.<br /> So, if anyone know the c…
  • Spectrum 48k Issue 4S?I just recieved a Spectrum 48K that had the bottom case from an issue 1 and the top half from a later issue, and the main board is 1983 Issue 4S. I a…
  • Intermittent reset on 48K (issue 4S)I'be been fighting an intermittent selfreset the whole day.<br /> <br /> Changed ULA - did not help.<br /> <br /> Tested TR6 as i could and compared …

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