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<1…16171819202122…34>
  • ZX spectrum 128K + 2 (Grey one :)Hi all, I'm trying to revive a dead ZX 128K +2 (the grey one). The regulator was damaged and seemed to be feeding 7.8Volts onto the pcb. Yikes ! I…

    ... ;717339]QUOTE
    "Using your 12V regulated PSU, connect it to ... TEA2000 and the +12V feed to the RGB / Video port. Use a ... /> END QUOTE

    Connected 12V to R8/L1 .
    It ...
    1024MAK 1024MAK August 2013 Hardware
  • Anyone using an RGB SCART cable with a +2A/+3 and LCD TV?In [URL="http://www.worldofspectrum.org/forums/showthread.php?t=44697"]a recent thread[/URL], I mused: [quote]Can +2As be composite modded? If so, I…

    ... level, and correct video system) in the composite video input pin, all ... (that have RGB video output sockets) is that the +12V pin (on ... the RGB video output socket) is ... obtained from the +12V line via ...
    1024MAK 1024MAK August 2013 Hardware
  • Anyone using an RGB SCART cable with a +2A/+3 and LCD TV?In [URL="http://www.worldofspectrum.org/forums/showthread.php?t=44697"]a recent thread[/URL], I mused: [quote]Can +2As be composite modded? If so, I…

    ... the noise on the composite video pin :mad:

    If ... to "steal" a +5V or +12V supply from elsewhere and feed ...
    1024MAK 1024MAK August 2013 Hardware
  • Anyone using an RGB SCART cable with a +2A/+3 and LCD TV?In [URL="http://www.worldofspectrum.org/forums/showthread.php?t=44697"]a recent thread[/URL], I mused: [quote]Can +2As be composite modded? If so, I…

    ... level, and correct video system) in the composite video input pin, all ... (that have RGB video output sockets) is that the +12V pin (on ... the RGB video output socket) is ... obtained from the +12V line via ...
    guesser guesser August 2013 Hardware
  • +3 on GT65I got the green Amstrad monitor GT65 and I was wondering , it can be connected to the spectrum +3, completely (power supply and video)? I saw that th…

    ... +3, completely (power supply and video)?
    I saw that there ... are some adapters for video, but I dont know whether ... use 5V for computer and 12V for the disc drive.
    guesser guesser September 2013 Hardware
  • +3 on GT65I got the green Amstrad monitor GT65 and I was wondering , it can be connected to the spectrum +3, completely (power supply and video)? I saw that th…

    ... GT65 monitor, which supplies the 12v. The 5v is supplied again ... , the one next to the video cable/connector.

    I ... cable for both power and video, can't see why it ...
    Your Spec-chum Your Spec-chum September 2013 Hardware
  • Defective +2 grey with only random coloured screen while powering onHi, so the story goes: After buying myself an divIDE and a grey +2, this runs well for a few days. But while playing a game the picture stucks and …

    ... TEA2000 chip relies on +12v to generate video.

    Looks to ...
    balford balford September 2013 Hardware
  • First time capacitor replacementHi, I have an Issue 2 board, that i wish to start with recapping as advised on here, as they look to be all original. (Same with V3 board, but going…

    ... can sometimes give a better video picture (TR1, TR2).

    12V and -5V has to work ...
    1024MAK 1024MAK October 2013 Hardware
  • Video problem on grey +2I have a bad video problem on grey +2. The computer is in a poor shape, but the major problem is with the video. With a (known good) SCART cable I ca…

    ... RGB signals and synthesise Composite Video for the modulator.
    ... of hack, like feeding Composite Video on pin 20 (typically ... switching between RGB and Composite Video modes. That scenario is ... 12V
    LK2 open, LK4 closed: RGB pin 1 = Composite Video
    skagon skagon October 2013 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…

    ... with a [I]very [/I]noisy display greeted me upon power ... 't be helping the -5v/12v generation.

    A swift ...
    balford balford October 2013 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…

    ... fine. Means we have -5V, 12V and +5v available there. (I ... :-))

    - I made a video from start up sequence, because ...
    maskenlos maskenlos October 2013 Hardware
  • One more grey +2 with video problemsI guess I need your help again to hopefully be able to do some proper troubleshooting myself one day. Here I have a grey +2, which could be a bottom…

    ... one doesn?t fix the video problem either.[/QUOTE]

    video at all, you are missing +12V that comes ... IC3, you should read -12V and +12V respectively, plus and minus 0 ...
    Falco-F8L Falco-F8L October 2013 Hardware
  • One more grey +2 with video problemsI guess I need your help again to hopefully be able to do some proper troubleshooting myself one day. Here I have a grey +2, which could be a bottom…

    ... no time I had a video signal. Now TR9 stays cool ... a short circuit on the +12V and -12V power rails.

    1024MAK 1024MAK October 2013 Hardware
  • One more grey +2 with video problemsI guess I need your help again to hopefully be able to do some proper troubleshooting myself one day. Here I have a grey +2, which could be a bottom…

    ... shown in Zorn?s 48K video. The outer positions both show ... a short circuit on the +12V and -12V power rails.

    schombi schombi October 2013 Hardware
  • One more grey +2 with video problemsI guess I need your help again to hopefully be able to do some proper troubleshooting myself one day. Here I have a grey +2, which could be a bottom…

    ... no time I had a video signal. Now TR9 stays cool ... . That is, measure resistance between +12V and ground (probe both legs ... of C41), and between -12V and ground (probe both legs ... a very low resistance on +12V, then desolder briefly C41 and ...
    Falco-F8L Falco-F8L October 2013 Hardware
  • Extras: scripted lines or talking b0ll0cks?!When you get films or tv shows with scenes with lots of extras in the background - like a restaurant scene, or in a public place, or whatever - does …

    ... days can import and playback video files with the picture, so ... wind machines, which are very noisy require the dialogue to be ...
    Jimmo Jimmo November 2013 Chit chat
  • Toastrack poor pictureGot a toaster in that had a blown regulator, after replacing I can "just" about tune it in but its really poor, I can barely make out the menu. Im s…

    ... -5V supplies. The +12V only supplies the video circuits and the RS232 ...
    1024MAK 1024MAK December 2013 Hardware
  • Toasted +3Oops.. I shorted one of my +3 (being clumsy with multimeter, doh) when measuring PSU connector pins :D Any immediate guesses what exactly died on thi…

    ... either the +5V or the +12V supply (but not a short ... connections via say the UHF/Video/Audio leads AND the 0V ...
    1024MAK 1024MAK December 2013 Hardware
  • +2A/+3 composite modHi, Anyone has experience doing a composite output mod for +2A/+3? (yes.. I also have a working RGB) A while ago I did one based on the instruction…

    [QUOTE=guesser;742334]What s-video mod did you do? Was ... a pull-up resistor to 12V making another potential divider (with ... /> To put luminance on the video connector I removed one of ... the existing +2 video signals (vertical sync) and applied ...
    rga24 rga24 December 2013 Hardware
  • 128K RGB Display problem.I have just got my hand on a toast rack, but when powered and connected to the telly the picture jumps horizontally at random intervals. Could it be…

    ... between 9.5V and 12V for normal 4:3 aspect ... mode (NOT composite or S-Video mode), PAL colour (as ... need to obtain a +12V supply from either a separate ... PSU, or get +12V from the Spectrum's RS232 ... existing wire, and connect +12V via a 100 ohm resistor ...
    1024MAK 1024MAK December 2013 Hardware
  • 128K RGB Display problem.I have just got my hand on a toast rack, but when powered and connected to the telly the picture jumps horizontally at random intervals. Could it be…

    ... between 9.5V and 12V for normal 4:3 aspect ... mode (NOT composite or S-Video mode), PAL colour (as ... need to obtain a +12V supply from either a separate ... PSU, or get +12V from the Spectrum's RS232 ... existing wire, and connect +12V via a 100 ohm resistor ...
    Lost Lost December 2013 Hardware
  • eBay 128K Spectrum RGB cables overheat the Spectrum!?Hi everybody, For a long time I've wondered why Spectrum 128K Toastracks were overheating when using my Retro Computer Shack RGB SCART cable. Today …

    ... seems to use the composite video as the RGB switching pin ... (you should never use a video signal as a constant voltage ... the ULA and the composite video pin.
    Of course I ... from the RS232 port's 12V line via a 330 Ohm ...
    Spirantho Spirantho February 2014 Hardware
  • New Game:Killer BeesI have ported one of my favourite games for the Phillips G7000 to the ZX Spectrum. Killer Bees, I spent hours playing this as a kid. The original g…

    ... right instant, mucked with the video controller registers in some way ... as to mess up the video signal, then undid this N ... era were pretty tolerant of noisy input, pretty good a recovering ... imprecision, I positioned some other video element on top of the ...
    BobHarris BobHarris February 2014 Brand new software
  • 48k Missing D15Got a 48k here that is missing D15 (just below right molex connector), someone removed it in the past, only just noticed it was gone after replacing …

    ... just the +12V supply. The +12V supply feeds the LM1889 video colour chip ...
    1024MAK 1024MAK February 2014 Hardware
  • +2 Grey video issueSo far ive replaced TR4, TR5 (and correctly orientated them) and seperated the audio from the video, still I have this; [youtube]mZZWOXRs_Zk[/youtube…

    ... a failure of the +12v supply would result in a ... of picture even if +12v is missing.[/QUOTE]I think ... of the +12V supply kills the composite video (used as ... up). As the composite video is not available, the ... />
    But the RGB video is still available, as it ...
    1024MAK 1024MAK February 2014 Hardware
  • Grey +2 DiedHi all, Thrashing my +2 playing Mugsy last night and it did this... [URL="https://m.flickr.com/photos/83515822@N05/13012551693/lightbox/"]https://m…

    ... you have a video display means that the +12v generation is working ... it is the TEA2000 composite video encoder - the 16 x 4164 ...
    balford balford March 2014 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…

    ... life on -5V and +12V rails. I needed to change ... all three rails. The +12V rail was bit low but ... the low value on the +12V rail. I had tried ... the ZTX213. A Spectrum fixing video on YouTube proved me wrong ... had proper value on the +12V line. Crossing my fingers I ...
    protek protek April 2014 Hardware
  • Spectrum +2 (Grey version) RGB SCART QuestionHi Guys, A quick question for you. As the new owner of a 128K Spectrum +2 (grey version), I'm using a cable from Retro Computer Shack which tries to…

    ... CSync to drive the blanking video input on pin 16 of ... can be reconfigured to provide +12v down pin 5 of the ... not entirely sure where the 12v is coming from and whether ...
    Lost Lost April 2014 Hardware
  • eBay 128K Spectrum RGB cables overheat the Spectrum!?Hi everybody, For a long time I've wondered why Spectrum 128K Toastracks were overheating when using my Retro Computer Shack RGB SCART cable. Today …

    ... can be taken from the 12V line or the 5V line ... Spectrum to the 8-Pin video jack.

    Ingo ...
    ingo ingo May 2014 Hardware
  • eBay 128K Spectrum RGB cables overheat the Spectrum!?Hi everybody, For a long time I've wondered why Spectrum 128K Toastracks were overheating when using my Retro Computer Shack RGB SCART cable. Today …

    ... can be taken from the 12V line or the 5V line ... Spectrum to the 8-Pin video jack.

    Ingo.[/QUOTE ...
    bverstee bverstee May 2014 Hardware
<1…16171819202122…34>

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