World of Spectrum
  • Categories
  • Discussions
  • FAQ
  • Sign In
Home › Search
Title Search
@title beer Word 'beer' in title
User Search
  • @user admin Only posts by Admin
Text Search
  • @body beer Word 'beer' in the text
Phrase Search
"Hello World" Exact phrase match
Exclude Terms
  • car -red Search cars that are not red
"Or" Searches
  • honda | bmw 'honda' or 'bmw' results
Multi-Field
@(title,body) hello Both contain 'hello'
WildCard
  • hond* civ* Match all with an astrix
Combination
  • @title bmw @user admin
See more supported syntax examples
Search Again :: Adv Search 1000 results in 0.002s
<1…17181920212223…34>
  • 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
  • Spectrum dead: 8 vertical bars in alternating colorsI have been soldering on this basterd for a long time now. All IC's now have sockets (except the LM1889). I swapped all 4116's by types that are 100%…

    ... ULA is supposed to carry +12V. +12V is perfectly available, as I ... . Hopefully that helps, but the +12V on the ULA is definitely ...
    georgedb georgedb September 2009 Hardware
  • Spectrum dead: 8 vertical bars in alternating colorsI have been soldering on this basterd for a long time now. All IC's now have sockets (except the LM1889). I swapped all 4116's by types that are 100%…

    ... is was supposed to be 12V. I also solved anoth mystery ...
    georgedb georgedb September 2009 Hardware
  • dead issue 6a boardI've just been back to the uk and found my old 48K + there - and bought it back with me to singapore - it's giving white border and red bars. From wh…

    No, I mean the supply circuit inside the Spectrum, a DC-DC transformer that generates 12V and -5V off from the 9V main supply.
    mcleod_ideafix mcleod_ideafix September 2009 Hardware
  • RBG monitor for Spectrum?I'm using a very old TTL RGB monitor with my Spectrum, with a RGB adapter that I made many years for my Sinclair QL. It works perfectly with my QL, b…

    ... , but you will loose the 12V signal, needed for some TV ...
    mcleod_ideafix mcleod_ideafix September 2009 Hardware
  • RBG monitor for Spectrum?I'm using a very old TTL RGB monitor with my Spectrum, with a RGB adapter that I made many years for my Sinclair QL. It works perfectly with my QL, b…

    ... and LK7 is absent)
    +12V..........n/c..........5 (if LK3 ...
    ingo ingo September 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…

    ... ZTX651, restoring the -5v line. 12v line now has a value ... closer to 12v.

    But I still ...
    kwyjibo kwyjibo September 2009 Hardware
  • Dead 48K Speccy.Blow this up as a child... thought I'd get it down from the loft and see if I can repair it. Upon power up, it displays this: [IMG]http://i266.photo…

    ... voltages at low memory (5V, 12V, -5V) and see if there ...
    mcleod_ideafix mcleod_ideafix September 2009 Hardware
  • Dead 48K Speccy.Blow this up as a child... thought I'd get it down from the loft and see if I can repair it. Upon power up, it displays this: [IMG]http://i266.photo…

    ... voltages at low memory (5V, 12V, -5V) and see if there ...
    cycyc cycyc September 2009 Hardware
  • Any help appreciatedHello, I notice that people have posted their PC related hardware and software woes on this forum before and the more technically minded among you h…

    ... voltage. red=5v and yellow=12v. this isn't conclusive and ...
    freddyhard freddyhard September 2009 Chit chat
  • I bought my first ZX Spectrum 48k, now what ?Hi guys ! I recently go to Brussel in Belgium and found a ZX Spectrum at a "flea market" (sorry, I don't the correct word for that, let's call it a …

    ... ZX Spectrum, but only a 12V which fit perfectly. Will it ...
    LunaVorax LunaVorax September 2009 Hardware
  • I bought my first ZX Spectrum 48k, now what ?Hi guys ! I recently go to Brussel in Belgium and found a ZX Spectrum at a "flea market" (sorry, I don't the correct word for that, let's call it a …

    ... ZX Spectrum, but only a 12V which fit perfectly. Will it ...
    RetroTechie RetroTechie September 2009 Hardware
  • PC Cooling recommendationsLast week I bought an uber gfx card (for me, normally I stick at least two gens back, but long story short - it was a cheaper option than what I had …

    ... is the amps on the 12v rails. the last PSU i ... /image_03.jpg"]72amps on the 12v rail[/URL], but for your ...
    freddyhard freddyhard October 2009 Chit chat
  • Snow on screen of 48K Speccyok you wizards I fixed up my 4116 ram issue as Winston and McLeod advised me before by replacing with 4164's.... all I could find here in Singapore (…

    ... enough stable power supply of +12v, maybe because those ceramic ICs ...
    8bitchip 8bitchip October 2009 Hardware
  • Snow on screen of 48K Speccyok you wizards I fixed up my 4116 ram issue as Winston and McLeod advised me before by replacing with 4164's.... all I could find here in Singapore (…

    ... to suggest the +12v line seems wrong - the 12v line in my ...
    nuggetreggae nuggetreggae October 2009 Hardware
  • Another set of USA newbie ZX Spectrum questions.So yeah, I'm considering getting a ZX Spectrum 48k pretty soon, but since I'm not in the country of origin, I have a few questions about it. First, …

    ... used by the +2A. The -12V aren't necessary unless I ...
    zxbruno zxbruno November 2009 Hardware
  • Diagnosing Spectrum 48k (faulty RAM chip?)I have a Spectrum 48k (I believe it may be an upgraded 16k model) that doesn't work, and never has ever since the owner gave it to me. When you turn …

    I've just measured the internal voltages as per the service manual on this site, and both points that are supposed to be 12V actually measure around 10V - would this be the cause of my problem? Which component is to blame?
    Muzer Muzer November 2009 Hardware
  • Diagnosing Spectrum 48k (faulty RAM chip?)I have a Spectrum 48k (I believe it may be an upgraded 16k model) that doesn't work, and never has ever since the owner gave it to me. When you turn …

    ... mode supplies). You should have +12v, +5v and -5v available on ...
    Winston Winston November 2009 Hardware
  • Diagnosing Spectrum 48k (faulty RAM chip?)I have a Spectrum 48k (I believe it may be an upgraded 16k model) that doesn't work, and never has ever since the owner gave it to me. When you turn …

    ... to pin 16 must read +12v
    voltage of pin 9 ...
    Nuno2009 Nuno2009 November 2009 Hardware
  • Diagnosing Spectrum 48k (faulty RAM chip?)I have a Spectrum 48k (I believe it may be an upgraded 16k model) that doesn't work, and never has ever since the owner gave it to me. When you turn …

    ... would be missing (and the +12V a little too low)?
    Muzer Muzer November 2009 Hardware
<1…17181920212223…34>

Latest Posts

  • I am currently watching.....
    Paradigm Shifter on 12:49AM
  • New video about S-video modification on Issue two 48K Spectrum.
    Renegade on April 21
  • Fixed Speccy Software. And which games remained unfixed?
    John Elliott on April 21
  • Happy 40th Birthday to the Amstrad CPC464!
    rich_chandler on April 21
  • Another Birthday! The Game Boy Is 35!
    mel the bell on April 21
  • European Software Titles with an English version
    harriusherbartio on April 21
  • Elusive Strategy Games done by the Smaller or less Prolific Software Houses.
    harriusherbartio on April 21
  • 1992 Spectrum Software
    harriusherbartio on April 21
  • +3 Disk drive motor
    AndyC on April 21
  • Celebrity deaths...
    mel the bell on April 20

HitBox

Word Docs Hits
12v 1.9K 3.2K
ripple 184 257

Related Threads

  • +12v/-12v/9v and peripherals?Do any peripherals use the +12v, -12v or 9v lines exposed at the edge connector?<br /> <br /> Firstly, if they use +9v they won't work on a +3, since…
  • 12V ripple with lower ram installedI repaired a speccy this week. Before doing anything I replaced all caps and measured the transistors in the power section. When doing this I found t…
  • 12V -> 9VI found this simple dc-dc converter:<br /> [url]http://www.mcrent.com/workbench/dcdc1216/[/url]<br /> it converts 12V to 16V, can it be used to produ…
  • Spectrum +2 grey 12v railHello everyone,<br /> <br /> I have this grey +2 with no video from tv. After much reading and testing i realized it was the internal power supply. A…
  • 12v in a Spectrum +2My Speccy 128 +2 requires a 9v 2.1a PSU, all my 9v PSU's are much below 2.1 amps :(<br /> <br /> I do however have a 12v 2amp PSU, if I reverse the p…
  • 12V Rail - Spectrum 48kOkay - I may just be having a senior moment here, but I'm running out of ideas.<br /> <br /> I'm working on a Spectrum Issue 4S board,and have had …
  • ZX Spectrum Issue 2 - 12V badHey there,<br /> I'm currently attempting to fix a ZX Spectrum issue 2 that I recieved. <br /> Overall the machine was generally working when I rec…
  • 12V missing on an issue 3I’ve been working on an issue 3 Spectrum +. It shows thin distorted vertical stripes on bootup. +5 and -5V are all right but the 12V line measures ro…
  • zx spectrum +2A power supply missing -12v voltshey.. i'm looing at a zx spectrum +2A power supply that the -12v rail seems to be missing .. it has the 12 volts and 5 volts .. it is the version wit…

Related Searches

  • datacorder 12v
  • toastrack 12v tr
  • toastrack 12v tr4
  • missing 12v
  • 12v
  • low resistance 12v
  • 12v coil
  • harlequin 12v
  • toastrack 12v
  • 12v 22v
  • 12v high
  • 12v problem
  • system 3 ripple
  • decoupling 12v
  • 12v noise
  • 12v ac
  • 12v ma
  • 12v mv
  • ripple
  • 12v power supply

Copyright © 2024 World of Spectrum