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>
  • 4116 SRAM replacement (and ULA timings).As mentioned in another thread, I have spent quite a lot of time experimenting with different circuits and components for using a static RAM IC to re…

    ... have sufficiently low gate threshold voltages to work, and many types ...
    Winston Winston March 2012 Hardware
  • 128k Toastrack repair advice needed..Hey all, Just got my second toast rack in a oddball deal when i visited a local farmer for some other second hand stuff. The 128 was sitting in a p…

    ... because it looked suspect. Wrong voltages came from missing 5V, at ...
    Asure Asure March 2012 Hardware
  • Faulty +2 advice please :)Hi all , I have a faulty +2 which when powered up gives a black border and 6 black and White stripes , I'm thinking faulty ram ??? Any one have any b…

    I've seen this effect a few times, when the power plug socket was loose or not fully connected/inserted all the way. Does the ram get correct voltages to power up all the way?
    Asure Asure March 2012 Hardware
  • Microdrive units with weak (not dead) ULAs...Hi everybody, I've got a Microdrive unit here. It didn't work. It does now (actually, it was the ribbon had broken and the ground had lost contact, …

    ... what the output waveform and voltages are looking like on the ...
    Winston Winston March 2012 Hardware
  • 48k Speccy chucks a wobblerI've got a problem with my rubber keyed 48k speccy. When it is first switched on everything is fine but after a couple of minutes the picture on scr…

    ... 'd want to monitor these voltages as the Spectrum warms up ...
    Zorn Zorn March 2012 Hardware
  • TR4 is goneMy TR4 transistor is burned. Can I replace this transistor with a TIP31B or C ? My 4116 RAM ic?s are showing +0.05V, +5V and +8.49V... :) My Spectru…

    Hmmmm... I don?t know much about electronics. :)
    I?m only trying to learn fixing thie Speccy.
    Without the TR4, it turns on normally. But the voltages of 4116 are wrong.
    So if a 4116 is faulty, the TR4 can burn?
    Turrican Turrican April 2012 Hardware
  • TR4 is goneMy TR4 transistor is burned. Can I replace this transistor with a TIP31B or C ? My 4116 RAM ic?s are showing +0.05V, +5V and +8.49V... :) My Spectru…

    ... powered without all their supply voltages present. If I were you ...
    Zorn Zorn April 2012 Hardware
  • TR4 is goneMy TR4 transistor is burned. Can I replace this transistor with a TIP31B or C ? My 4116 RAM ic?s are showing +0.05V, +5V and +8.49V... :) My Spectru…

    ... smoke anymore. :)
    But my voltages on IC6 are yet wrong ... and C44) and measure the voltages... argh! :cry:

    PS ...
    Turrican Turrican April 2012 Hardware
  • TR4 is goneMy TR4 transistor is burned. Can I replace this transistor with a TIP31B or C ? My 4116 RAM ic?s are showing +0.05V, +5V and +8.49V... :) My Spectru…

    ... smoke anymore. :)
    But my voltages on IC6 are yet wrong ...
    guesser guesser April 2012 Hardware
  • TR4 is goneMy TR4 transistor is burned. Can I replace this transistor with a TIP31B or C ? My 4116 RAM ic?s are showing +0.05V, +5V and +8.49V... :) My Spectru…

    ... don't know where my voltages are becoming wrong... :(
    Maybe ... points can I measure the voltages to know where they are ... 4116 until I fix the voltages.

    Thanks ...
    Turrican Turrican April 2012 Hardware
  • Does a spectrum +2 power supply work on a +3?tiny question, does a spectrum +2 power supply work for a +3?

    ... supply has all the same voltages on the same pins as ...
    guesser guesser April 2012 Hardware
  • No colour after changing LM1889NI replaced the faulty LM1889N in my issue 2 spectrum, since I had a very yellow picture, and soldered a socket to put the new LM1889N into, however, …

    ... . And the VR1 and VR2 voltages was at their correct levels ...
    Johan1973 Johan1973 April 2012 Hardware
  • Does a spectrum +2 power supply work on a +3?tiny question, does a spectrum +2 power supply work for a +3?

    ... ?[/QUOTE]

    No. The voltages are the same, the worst ...
    guesser guesser April 2012 Hardware
  • Zx 48k after the ic7805 other problemHi everyone, i am Tiago from Portugal, and i am trying to repair a Zx Spectrum 48K. the machine didn't do anything, no image, no sound, nothing. The…

    ... numbers in brackets after the voltages.

    If the -5V ... .

    If all the voltages are present, then your Spectrum ...
    Zorn Zorn May 2012 Hardware
  • Zx 48k after the ic7805 other problemHi everyone, i am Tiago from Portugal, and i am trying to repair a Zx Spectrum 48K. the machine didn't do anything, no image, no sound, nothing. The…

    ... powered without all their supply voltages the more likely they are ...
    Zorn Zorn May 2012 Hardware
  • Dark Screen, non working 48k Spectrum (rubber key)I have an issue 1 (I think) "dead cockroach" 48k Spectrum. On power up I get a dark screen and the machine is unusable - see pics. Any ideas on the…

    ... fault. Are all the supply voltages present at the 4116 ICs ...
    Zorn Zorn May 2012 Hardware
  • Occasional noise over RGB on +2AHi all I have a +2A that is misbehaving at the moment. I'm using the RGB to SCART lead (which incedentally is great on my +3) The problem is, the …

    I havent opened my +2s but making an RGB cable today I was finding the voltages were most certainly not what the various docs claimed they should be. Leading me to think +2s are just wrong(tm).
    XorA XorA May 2012 Hardware
  • 48k PSU UpgradeCan anyone give the definitive word on a PSU upgrade (rather than just a replacement) for 48k machines? I'm thinking of adding at least an IDE inter…

    ... , he could get the additonal voltages. It is good for up ...
    Johan1973 Johan1973 May 2012 Hardware
  • Zx 48k after the ic7805 other problemHi everyone, i am Tiago from Portugal, and i am trying to repair a Zx Spectrum 48K. the machine didn't do anything, no image, no sound, nothing. The…

    ... then any of the 2 voltages is still not ok, I ...
    Knik Knik May 2012 Hardware
  • +3 PSUHiya. Having moved house 3 times since using my +3, I appear to have lost the power supply. I don't suppose anyone has a spare they would like to s…

    ... PSU this has all the voltages you need and is easier ...
    guesser guesser May 2012 Wanted
  • Replacing coil with other component?The purpose of the coil transformer, from what I gather in the schematics of the issue 2 spectrum, is to create 5V from about 9-10V. Would it not be …

    ... .[/QUOTE]

    Measuring the voltages at the coil with a ...
    Zorn Zorn June 2012 Hardware
  • Better Picture QualityToday I built a PSU and RGB-SCART monitor cable for my +3. However, I'm not too happy with the picture quality. It appears that there's like halos a…

    ... you are getting the correct voltages out of the scart cable ...
    guesser guesser June 2012 Hardware
  • 48k+ CPU SocketThink I've bitten off more than I can chew... After the desoldering my z80 went without incident, no damaged pads, tracks etc. I expected the socket…

    ... ] suggests that TR3 and/or TR6 could have bought it and ... near TR3 and I knocked TR6 a few times whilst working ...
    napoleonblownaparte napoleonblownaparte June 2012 Hardware
  • 48k+ CPU SocketThink I've bitten off more than I can chew... After the desoldering my z80 went without incident, no damaged pads, tracks etc. I expected the socket…

    ... enough for TR3, but for TR6? Hmm.... (unsolder one side of ...
    RetroTechie RetroTechie June 2012 Hardware
  • 48k+ CPU SocketThink I've bitten off more than I can chew... After the desoldering my z80 went without incident, no damaged pads, tracks etc. I expected the socket…

    ... number of tries. The 3 voltages were OK though.
    It ...
    roko roko June 2012 Hardware
  • Ear + Mic bits behaviour in relation to beeper outputHave just read [url=http://www.worldofspectrum.org/forums/showpost.php?p=348953&postcount=38]this old post of Joefish's [/url] in the development for…

    ... can effectively generate 4 different voltages on pin 28 (which drives ... EAR is 0, the two voltages generated (MIC=0 and MIC ...
    Jon Needle Jon Needle June 2012 Emulators
  • Ear + Mic bits behaviour in relation to beeper outputHave just read [url=http://www.worldofspectrum.org/forums/showpost.php?p=348953&postcount=38]this old post of Joefish's [/url] in the development for…

    ... EAR is 0, the two voltages generated (MIC=0 and MIC ... four levels, mapping the ULA voltages directly to the sample values ...
    Patrik Rak Patrik Rak June 2012 Emulators
  • 48k+ CPU SocketThink I've bitten off more than I can chew... After the desoldering my z80 went without incident, no damaged pads, tracks etc. I expected the socket…

    ... I've yet to replace TR6.

    Thanks Johan, but ...
    napoleonblownaparte napoleonblownaparte June 2012 Hardware
  • 48k+ CPU SocketThink I've bitten off more than I can chew... After the desoldering my z80 went without incident, no damaged pads, tracks etc. I expected the socket…

    ... measure.

    Check your voltages on lower memory.
    Johan1973 Johan1973 June 2012 Hardware
  • Need some advice about electronicsI have wired up an ATX power supply to power my spectrums through a DC-DC converter that gives 9V from the +12V rail. It works well. However, I also …

    ... ground levels without influencing differential voltages between ground and signals.
    ingo ingo June 2012 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
tr6 104 152
voltages 1.2K 1.5K

Related Threads

  • voltagesAll the Spectrums use a 9V power supply, I think. But would you get away with using a transformer that only gives you 7V?
  • Spectrum +2 power supply - voltages on each pin..?My +2 suddenly stopped working yesterday. It was working fine earlier in the day and now the power light will not go on, nor will the tape drive and …
  • Lower Memory - Why Multiple Voltages?Having spent much of the weekend working on getting my old Spectrum working, my Dad (who is visiting) and I were chatting about the schematic.<br /> …
  • zx spectrum without TR6 (ZTX313)Hi<br /> is it possible that a zx spectrum 48 issue 2 works without TR6 (ZTX313)?<br /> Should be very interesting.
  • Spectrum & ZX81 PSU Strange VoltagesHi all<br /> <br /> I've just refurbished my ZX spectrum PSU after i accidently broke one of the wires i soldered the joints to the PCB nicely and al…
  • Spectrum Issue 2 - TR6 ReplacementI've just got my hands on an Issue 2 ZX Spectrum, that needed some repairs. The picture quality after doing a composite modification was pretty shodd…
  • Pictures of 48k ZX Spectrums Showing the Important Voltages[SIZE=6][B]Pictures of 48k ZX Spectrums Showing the Important Voltages[/B][/SIZE]<br /> <br /> [URL="https://farm4.staticflickr.com/3841/15005543009_…
  • Voltages from Original ZX Power suppliesHi. I've recently picked up a few power supplies in boot sales, one for a ZX81 and another for the ZX Spectrum.<br /> <br /> For the first time eve…
  • New colour palette for 16K/48K/+ machines, based on ULA YUV voltagesI’ve made a colour palette for 16K/48K/+ machines, based on the YUV voltage tables in Chris Smith’s book The ZX Spectrum ULA.<br /> <br /> This col…
  • Spectrum 48K / composite mod / LCD TV: voltages out of the ULAHello Spectrum World<br /> <br /> I have juste bought again my first computer on ebay... a Speccy 48k issue 2 with a 5C112E-2 ULA. Just had to repl…

Related Searches

  • issue 2 tr6
  • tr9 voltages
  • no voltages
  • tr6
  • tr6 ula mark
  • tr6 ula
  • tr6 dead cockroack
  • ay voltages
  • spectrum issue 2 voltages
  • tr6 faulty
  • low voltages
  • voltages palette
  • rectifier voltages

Copyright © 2024 World of Spectrum