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Search Again :: Adv Search 1000 results in 0.002s
<1…16171819202122…34>
  • 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
  • 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
  • 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
  • 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
  • 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…

    ... . 5v line was 4.87, 12v line was 10.78, and ...
    kwyjibo kwyjibo July 2009 Hardware
  • Two dead SpectrumsHi all, Long time since I posted on here. I'm having a bit of a clear-out, and I've re-discovered two Spectrums I had in the loft : One is an orig…

    ... needs -5v supplying before the +12v or +5 supplies, and the ... video circuits aren't getting 12v. (A failed Z80 would give ...
    Winston Winston August 2009 Hardware
  • ZX Spectrum not working - Please help.Hi there, I am new to this forum and was pointed in this direction by a fellow Youtuber after uploading the following video and then explaining that…

    ... least measuring key voltages (+5V, +12V and -5V).
    mcleod_ideafix mcleod_ideafix August 2009 Hardware
  • ZXPROJECT update: a replacement for TEA2000Just go to [url]http://www.zxprojects.com[/url]

    ... may be related in generating 12V from 9V supply, but that ...
    mcleod_ideafix mcleod_ideafix August 2009 Hardware
  • ZXPROJECT update: a replacement for TEA2000Just go to [url]http://www.zxprojects.com[/url]

    ... may be related in generating 12V from 9V supply, but that ...
    velesoft velesoft August 2009 Hardware
  • ZXPROJECT update: a replacement for TEA2000Just go to [url]http://www.zxprojects.com[/url]

    ... may be related in generating 12V from 9V supply, but that ...
    Hood Hood August 2009 Hardware
  • Two dead SpectrumsHi all, Long time since I posted on here. I'm having a bit of a clear-out, and I've re-discovered two Spectrums I had in the loft : One is an orig…

    ... expect the +5v, -5v, and +12v supplies to these chips. Then ...
    Winston Winston August 2009 Hardware
  • Welcomes...and some technical stuffHello I`d like to welcome all ZX Fans. I`m rather ATARI 8bit geek - I got this grat machine when I was 14...20 yeras ago... There were few ZX in …

    ... cannot be (easily) derived from 12V or 5V, if you intented ... 7905 to derive -5V from -12V, so you can use whatever ... the computer, just 5V and 12V (hence, allowing you to use ...
    mcleod_ideafix mcleod_ideafix August 2009 Hardware
  • Welcomes...and some technical stuffHello I`d like to welcome all ZX Fans. I`m rather ATARI 8bit geek - I got this grat machine when I was 14...20 yeras ago... There were few ZX in …

    ... course.

    It supplies : 12V,5V, -12V, Gnd
    lotharek lotharek August 2009 Hardware
  • Welcomes...and some technical stuffHello I`d like to welcome all ZX Fans. I`m rather ATARI 8bit geek - I got this grat machine when I was 14...20 yeras ago... There were few ZX in …

    ... /> my specyy 48+ needs only 12V and 5V (so far)

    KM1889N needs 12V....anything else ???

    -12V and -5V are ...
    lotharek lotharek August 2009 Hardware
<1…16171819202122…34>

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