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Search Again :: Adv Search 1000 results in 0.002s
<1…16171819202122…34>
  • Issue 3B problemHi! I have an issue 3B board that is having a strange problem: when I got it it didn't had the -5V and +12v, as usual. After replacing TR4 and TR5 t…

    ... bad solder joints on the +12v circuit, and excessive current ... consumption on the 12v line. Excessive current consumption ... will cause the +12v to sag. The proper ... current consumption on the 12v line is an exercise ...
    Winston Winston April 2009 Hardware
  • speccy 128 toastrack joysticksDoes the RS232 port (or the keypad port) work as a joystick port on the toast rack, and if so what 'system' is it...interface 2 or kempston? Secondl…

    ... , meaning they give +/-12V out, and expect +/-12V in. Then they're ...
    Phu Phu April 2009 Hardware
  • Using a Spectrum in JapanHi all, at the moment I have a 48k Spectrum on its way (with a LOT of other stuff) to Japan where I intend to use it. So I have some fairly straight…

    ... adapter provides the +5V and +12V that the above models need ... . The -12V isn't really necessary, because ...
    zxbruno zxbruno May 2009 Hardware
  • Using a Spectrum in JapanHi all, at the moment I have a 48k Spectrum on its way (with a LOT of other stuff) to Japan where I intend to use it. So I have some fairly straight…

    ... they use +5V @ 2A, +12V @ 700mA, and -12V @ 50mA.

    So ...
    MagicKnight MagicKnight May 2009 Hardware
  • Multiface 128 Disassembly questionI was looking at a disassembly from a Multiface 128 rom, now I'm not a coder so I have a question, am I correct in understanding the code starts at #…

    ... the bus. (Also a simple ripple priority scheme can be implemented ...
    Winston Winston May 2009 Development
  • PSU for + AND +2 for saleHi all. as I live in Canada now, I cannot use either of my UK(240 Volt) power supplies. I'm over in the UK right now, so can post these 2 out to …

    ... on the end giving +5V, +12V and -12V supplies).
    trellis trellis May 2009 Sales
  • Transferring +3 Disk Image from PC to real +3Is there a way to do this without physically connecting the +3 disk drive to the PC? Something like a Speccy version of the "Xfer in C" utility for…

    ... and the power (5v and 12v) reversed.

    Or when ...
    Andrew Barker Andrew Barker June 2009 Sinclair Miscellaneous
  • Help - no tv receptionHi I've just bought a 128k Spectrum +2 from ebay & am having trouble getting any output on a tv. The specy seems to work - the power light comes on …

    ... inverter circuit that generates the +12V line inside the machine. The ... PAL encoder chip (TEA2000) requires +12V to operate, resulting in the ... the external power supply provides +12V.
    trellis trellis June 2009 Hardware
  • Help - no tv receptionHi I've just bought a 128k Spectrum +2 from ebay & am having trouble getting any output on a tv. The specy seems to work - the power light comes on …

    I think the +12V is still needed for RGB ... a bad connection on the +12v line, and whenever it goes ...
    Winston Winston June 2009 Hardware
  • Help - no tv receptionHi I've just bought a 128k Spectrum +2 from ebay & am having trouble getting any output on a tv. The specy seems to work - the power light comes on …

    ... =Winston;360940]I think the +12V is still needed for RGB ... a bad connection on the +12v line, and whenever it goes ... continues to work if the +12V line is down. Just the ...
    trellis trellis June 2009 Hardware
  • computer wisdom neededany ideas? my computers dying, yesterday my computer developed a fault whereby itd keep freezing up, it did it on my XP and ME partitions and even o…

    ... giving out excess voltage/amperage ripple this can also cause problems ...
    Scottie_uk Scottie_uk June 2009 Chit chat
  • Reading from the 128 Serial PortDon't shout at me if this is a silly question. I have Googled extensively, and searched the forums, but I can't find anything discussing what seems t…

    ... /> | 5 | 7 | CTS |
    | 6 | | 12V |
    +---------+---------+--------+
    [/SIZE][/FONT][/CODE ...
    guesser guesser June 2009 Sinclair Basic
  • not much gear and absolutley no ideaIm looking for some help with two spectrums that i have just dug out of storage and are both unfortunatley faulty. I had always regreted that during …

    ... - +5v, -5v and +12v. The -5v and +12v is supplied by the ...
    Winston Winston June 2009 Hardware
  • computer wisdom neededany ideas? my computers dying, yesterday my computer developed a fault whereby itd keep freezing up, it did it on my XP and ME partitions and even o…

    ... have up to four independent 12V rails. A cheap but reputable ... brand PSUs have just one 12V rail. I don't need ... -rail PSU design means the 12V can go wherever it's ...
    ajmoss ajmoss June 2009 Chit chat
  • power supply questionHi all, got my +2 ( Grey) back home to Canada. monitor should display ok, and I have a power supply I think will work. specs are : Input 120 V…

    I use a C64c supply with a homemade adapter to take the 9v for my +2 at the moment, its rated as 1.7A at 9v (really 10.1v). Works very well.

    My +3 power supply doesn't have a 9v output, only +-5 and 12v.
    FrankT FrankT June 2009 Hardware
  • Black screen of deathI recently aquired a zx spectrum (revision 3b) of the rubber key variety. it was all running smoothly(for about an hour after pluggin in), i left the…

    In general "no video but keyclicks" suggests absence of 12V.
    This voltage is generated inside the Spectrum, together with -5V for lower memory. Absence of these voltages might (will) damage lower memory.
    roko roko June 2009 Hardware
  • Black screen of deathI recently aquired a zx spectrum (revision 3b) of the rubber key variety. it was all running smoothly(for about an hour after pluggin in), i left the…

    ... but keyclicks" suggests absence of 12V.
    This voltage is generated ...
    nxgshadow nxgshadow June 2009 Hardware
  • Black screen of deathI recently aquired a zx spectrum (revision 3b) of the rubber key variety. it was all running smoothly(for about an hour after pluggin in), i left the…

    ... red on the pin for 12v.

    Also search this ...
    Winston Winston June 2009 Hardware
  • No picture on my LCD monitorHi all, more tech help required. I have my + 2 powered up ok. but when I run the yellow RCA lead from TV out to my convertor box I get no pict…

    Pin 1 (comp video) and 2 (ground).

    Note that the +2A/+3 has 12v on pin 1, which is why gasman warned you about +2 only ;-)
    csmith csmith June 2009 Hardware
  • Writing to the screen from a bufferI?m designing a game and am spending a bit of time trying different ideas before I commit my self. I?m currently thinking of writing data to a buffer…

    ... you want to see the ripple effect.

    Oh, and ...
    frobush frobush June 2009 Development
  • 48k + Power supplyHi, Anyone know where I can get a replacement PSU for the 48k Plus? Nothing on Ebay at the minute. Looks like the end is Imminent for my one! Tha…

    ... 5 volts gets split for +12v -5v with obviously +5v
    Zetr0 Zetr0 July 2009 Hardware
  • Interface One - New FunctionalityAs you may (or may not) be aware the Interface One is a pretty powerful piece of kit. One of it's greatest features is being able to easily extended …

    ... to be daisy chained, a ripple priority scheme could have been ...
    Winston Winston July 2009 Development
  • Interface One - New FunctionalityAs you may (or may not) be aware the Interface One is a pretty powerful piece of kit. One of it's greatest features is being able to easily extended …

    ... ROM very easy - implement a ripple priority scheme (easily done and ...
    Winston Winston July 2009 Development
  • Trouble with Spectrum 48kI think it is a Rev 3 (Issue 3 on the motherboard). The screen has weird characters, instead of text, and the keyboard is not responding (although it…

    ... that provides the -5v and +12v lines to these chips has ...
    Winston Winston July 2009 Hardware
  • 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, …

    ... your Spectrum doesn't have +12v or -5v used for video ...
    Jose_Leandro Jose_Leandro July 2009 Hardware
  • 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, …

    ... your Spectrum doesn't have +12v or -5v used for video ...
    josteint josteint July 2009 Hardware
  • 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, …

    I have to ask - what kind of Spectrum? Rubber key, 128K, or one of the Amstrad built models (+2 or +3)? If the latter if the PSU is not supplying 12v you will get a black screen with hints of activity.
    Winston Winston July 2009 Hardware
  • 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, …

    ... the PSU is not supplying 12v you will get a black ...
    mcleod_ideafix mcleod_ideafix July 2009 Hardware
  • 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, …

    ... your Spectrum doesn't have +12v or -5v used for video ...
    RetroTechie RetroTechie July 2009 Hardware
  • 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, …

    ... do. The Spectrum generates +5V, +12V and -5V from the 9V ...
    mcleod_ideafix mcleod_ideafix July 2009 Hardware
<1…16171819202122…34>

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