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<1…20212223242526…34>
  • Broken ZX Spectrum? :(Hi! I bought a 2nd hand ZX Spectrum half a year ago. It worked perfectly fine when I first tried it. I put it back in its box which it was sent in, …

    ... ground (metal cover of the modulator). There should be a voltage ...
    josteint josteint August 2010 Hardware
  • Sinclair QL on a Commode 1702Anyone ever build a cable for the QL RGB to use on the Commode 1702? I built one that gives a mono image last night but can't figure out the pinout f…

    ... wonder...Can the QL TV modulator have the the 'composite fix ...
    beanz beanz August 2010 Sinclair Miscellaneous
  • ZX Spectrum TV AppearancesThis thread is intended to be a long standing thread in which catalogued are Spectrum related Film TV appearances.

    Ah, I'd noticed it was a Speccy board before, and I can see the audio (not video) lead connected to the modulator, even assuming it's been composite modded, but not that that was the output lead of a DTV joystick.
    joefish joefish August 2010 Sinclair Miscellaneous
  • External Tape / Audio Input on Spectrum +2AEvening all, I've just picked up a Spectrum +2A and have been trying to load TZX files from my Mac into the Spectrum. I know the leads and methods …

    ... the right of the ASTEC modulator):

    [img]http://www ...
    Winston Winston August 2010 Hardware
  • Spectrum +2 Wont Tune inHey, I've got a Spectrum +2 and it won't tune in to the tv, I've tried on a few tvs but still no joy. The closest I've been is a black screen, when…

    ... machine, there is the RF modulator.. a bit of it might ...
    fog fog August 2010 Hardware
  • Silver speccy on the inside, you know what it is ?I was looking at one of my 48k speccys it has a label underneath with the serial printed on it and signed and dated, there is no permanent serial num…

    ... a spring from the UHF modulator to ground it to the ... casing (from memory). The modulator should also be a UM ... be linked to the US modulator. I also wonder if it ... the motherboard may have the modulator on the side rather than ...
    rwap rwap September 2010 Hardware
  • Silver speccy on the inside, you know what it is ?I was looking at one of my 48k speccys it has a label underneath with the serial printed on it and signed and dated, there is no permanent serial num…

    ... bottom), which is for TV modulator channel selection.

    But ...
    RetroTechie RetroTechie September 2010 Hardware
  • +3 issues....Hello All I came by a couple of +3's on ebay and I'm having issues with them. Since I only ever owned a rubber key, thought someone might be able to…

    A variable inductor would be a coil with an adjustable core inside (usually something you can screw up or down). I suppose guesser means the adjustment 'knob' on top of the video modulator? (if there is one, that is).
    RetroTechie RetroTechie September 2010 Hardware
  • +3 issues....Hello All I came by a couple of +3's on ebay and I'm having issues with them. Since I only ever owned a rubber key, thought someone might be able to…

    ... ' on top of the video modulator? (if there is one, that ...
    BiNMaN BiNMaN September 2010 Hardware
  • Help with broken SpectrumHi There, Just received a ZX Spectrum computer. It's an issue 3B (48k version). When I power it up (9V centre pin -V) nothing happens. It's complete…

    ... ) = GND = same electrical point as modulator case. Measure other voltages with ...
    RetroTechie RetroTechie September 2010 Hardware
  • Help with broken SpectrumHi There, Just received a ZX Spectrum computer. It's an issue 3B (48k version). When I power it up (9V centre pin -V) nothing happens. It's complete…

    ... /> That would take the video modulator (broken or not) out of ...
    RetroTechie RetroTechie September 2010 Hardware
  • +2A/+2B/+3/+3B researchdoing my redrawing/correcting of the +3 schematic I'm uncovering lots of oddities in the service manuals. I am trying to work out what really exists…

    ... ?
    (these are below the modulator can, and and near the ... a date code on the modulator can, which in my case ...
    guesser guesser September 2010 Hardware
  • +2A/+2B/+3/+3B researchdoing my redrawing/correcting of the +3 schematic I'm uncovering lots of oddities in the service manuals. I am trying to work out what really exists…

    ...
    Last date code: 8826 (Modulator)

    +3, Made In ...
    Last date code: 8719 (Modulator)

    +3, Made In ...
    Last date code: 8722 (Modulator)

    I haven't ... ; R62 is just below the modulator.
    glancaster glancaster September 2010 Hardware
  • +2A/+2B/+3/+3B researchdoing my redrawing/correcting of the +3 schematic I'm uncovering lots of oddities in the service manuals. I am trying to work out what really exists…

    ...
    Last date code: 8826 (Modulator)

    +3, Made ...
    Last date code: 8719 (Modulator)

    +3, Made ...
    Last date code: 8722 (Modulator)
    [/QUOTE]
    Excellent ta ... ; R62 is just below the modulator.[/QUOTE]
    oh, erm, * ...
    guesser guesser September 2010 Hardware
  • +2A/+2B/+3/+3B researchdoing my redrawing/correcting of the +3 schematic I'm uncovering lots of oddities in the service manuals. I am trying to work out what really exists…

    ... circuit instead of the FM modulator on the +2B ISSUE 4 ...
    guesser guesser September 2010 Hardware
  • Speccy Bundle I picked...againtwo vids this time [URL="http://www.youtube.com/watch?v=KHvjCE67KM4"]the machine and some other stuff[/URL] [URL="http://www.youtube.com/watch?v=MI…

    you might find the rf modulator is crap also, i have ...
    fog fog September 2010 Announcements
  • +2A/+2B/+3/+3B researchdoing my redrawing/correcting of the +3 schematic I'm uncovering lots of oddities in the service manuals. I am trying to work out what really exists…

    ... circuit instead of the FM modulator on the +2B ISSUE 4 ... .jpg[/url]

    The modulator has date 9031.

    Jose_Leandro Jose_Leandro September 2010 Hardware
  • Speccy Bundle I picked...againtwo vids this time [URL="http://www.youtube.com/watch?v=KHvjCE67KM4"]the machine and some other stuff[/URL] [URL="http://www.youtube.com/watch?v=MI…

    new membrane installed thanks to rst for the heads up on those RWAP guys.

    Will post another vid later, hopefully working fully, although looks like the modulator might be a slightly more troublesome issue...
    jdanddiet jdanddiet October 2010 Announcements
  • Spectrum Serial Numbers Wanted!![b]This post updated Sept. 26, 2013[/b] As far as I know, the serial numbering system for the Spectrum has never been fully worked out. For the p…

    ... AMI 8718ICZ AUSTRIA
    UHF modulator: ASTEC UM1233 E36 HONG KONG ...
    ASM ASM October 2010 Sinclair Miscellaneous
  • Broken +3I have noticed that some members on this forum prefer to repair Spectrums instead of just buying another one from ebay. I would like mine fixed at so…

    ... the metal case of the modulator. put the Z80 again in ... pin 26 unconnected. Touch the modulator with the wire (don't ... : remove the wire from the modulator. Does the border color change ... "reset" wire again to the modulator and turn on the computer ...
    mcleod_ideafix mcleod_ideafix October 2010 Hardware
  • zx spectrum ULAis the ULA in the 16K the same as in the 48K could you take the 16K ULA and place it in a 48K I ask this because i have a speccy thats dogy with th…

    wait! it is not the ULA thats broke, i switched them over again and it still is broken
    what else would cause problems? dont say rf modulator because when it breaks with a weird looking screen the keyboard does not work
    Robin Robin October 2010 Hardware
  • emulatorsplease help can we see clearly which emulator emaulates which hardware is there any that has a pc function key for the mulitface nmi button and the +…

    ... , connect that to a ?10 modulator off ebay, plug it into ...
    bobamu bobamu October 2010 Emulators
  • +2 power not working. Need helpHi folks, I'm hoping someone may be able to point out what could be wrong/needs fixing here. One of my +2's had a loose RF modulator. The 5v wire w…

    Disconnect the modulator again and check if all ...
    LCD LCD October 2010 Hardware
  • +2 power not working. Need helpHi folks, I'm hoping someone may be able to point out what could be wrong/needs fixing here. One of my +2's had a loose RF modulator. The 5v wire w…

    ... was a short inside the modulator can. I suspect that you ... a short circuit around the modulator and if you can rectify ...
    guesser guesser October 2010 Hardware
  • +2 power not working. Need helpHi folks, I'm hoping someone may be able to point out what could be wrong/needs fixing here. One of my +2's had a loose RF modulator. The 5v wire w…

    ... - maybe that +5V wire to modulator was disconnected for a reason ... +5 and ground (inside the modulator), chances are the rest of ... can do fine without the modulator - these days it's mostly ...
    RetroTechie RetroTechie October 2010 Hardware
  • +2 power not working. Need helpHi folks, I'm hoping someone may be able to point out what could be wrong/needs fixing here. One of my +2's had a loose RF modulator. The 5v wire w…

    ... ).

    I removed the modulator from the circuit board, and ...
    Evil Stripe Evil Stripe October 2010 Hardware
  • +2 power not working. Need helpHi folks, I'm hoping someone may be able to point out what could be wrong/needs fixing here. One of my +2's had a loose RF modulator. The 5v wire w…

    ... ).

    I removed the modulator from the circuit board, and ...
    guesser guesser October 2010 Hardware
  • Games in machine codeHi everyone, How do go about doing multiple shots like a machine gun, do you have to store every x and y position of each bullet? When you kill som…

    ... , instead of an Astec TV modulator you would have RGB out ...
    Winston Winston November 2010 Development
  • Timex 2048 documentsHi, I got Timex 2048, seems to work, but no colors on screen :cry:. Neither TV out, nor Composite works. ULA fault ? It seems TC 2048 uses MC 1377 a…

    ... ) :-) Hint - it is not TV modulator.
    I give you time ...
    kpuchatek kpuchatek November 2010 Hardware
  • 48k scartAnyone use or know anything about these? [url]http://cgi.ebay.co.uk/Sinclair-Spectrum-Composite-Video-Mod-Kit-Scart-TV-/260684941076?pt=UK_VintageC…

    ... desolder the connection from the modulator PCB to the RF socket ... wire from the modulator video input to the modulator PCB, so the ... modulator won't steal any ... ), is to replace the entire modulator PCB with this:
    [center ...
    mcleod_ideafix mcleod_ideafix November 2010 Hardware
<1…20212223242526…34>

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HitBox

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modulator 1.5K 2.1K

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