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  • +3 ProblemsI have been having a few problems with my +3 and I am wondering if anyone can help or give me some advice: 1. I have 2 blank disks which I have save…

    ... switch signal, when you put +12V on it, it tells your ... +3 has 2 pins with +12V on it, both connected through ... , make cable that connects original +12V to SCART pin 8 (function ... 's suggestion, and check if +12V pin on the +3's ...
    RetroTechie RetroTechie May 2010 Hardware
  • damaged spectrum+ (blinking squares)Hi, Sorry for my poor english, but I couldn't find on family forums any remedy for my hardware problem with my first speccy in my life :) I've bought…

    ... 23A is not delivering -12V as the manual says, ... but +12V.
    Quoting Dickens' hardware ... is therefore an unsmoothed +12V supply".
    Dickens mentions ... real life somewhere around 12V,
    B22,B23 ... is the generated +12V which often is a ...
    roko roko May 2010 Hardware
  • damaged spectrum+ (blinking squares)Hi, Sorry for my poor english, but I couldn't find on family forums any remedy for my hardware problem with my first speccy in my life :) I've bought…

    ... 8 to pin 16 is +12v
    voltage of pin 9 ...
    treneiro treneiro May 2010 Hardware
  • Some ROM/EPROM questions...I've got a ZX Spectrum +, a +2A and +3 computers, and I've been using +3e project ROMS for a while in my +3. I was thinking about using an EEPROM or…

    ... mentions 14V for erase, and 12V for programming - maybe there's ...
    RetroTechie RetroTechie June 2010 Hardware
  • Challenging the orthodoxy - Composite modWell, what's brought this on is two things: firstly I composite-modded an Issue 4S board this weekend in preparation for the Vintage Computing Festiv…

    ... with low peaks some 100 mV over ground and no problems ...
    ingo ingo June 2010 Hardware
  • Some ROM/EPROM questions...I've got a ZX Spectrum +, a +2A and +3 computers, and I've been using +3e project ROMS for a while in my +3. I was thinking about using an EEPROM or…

    ... Spectrum, so using +14v or +12v wouldn't be a problem ...
    Zup Zup June 2010 Hardware
  • +3 needs putting out of its misery[URL="http://cgi.ebay.co.uk/SINCLAIR-ZX-SPECTRUM-3-128K-FDD-GAMES-CLASSIC-VINTAGE-/270590074074?cmd=ViewItem&pt=UK_VintageComputing_RL&hash=item3f006…

    ... system but fails on the 12V the drive needs, and that ...
    joefish joefish June 2010 Chit chat
  • +3 needs putting out of its misery[URL="http://cgi.ebay.co.uk/SINCLAIR-ZX-SPECTRUM-3-128K-FDD-GAMES-CLASSIC-VINTAGE-/270590074074?cmd=ViewItem&pt=UK_VintageComputing_RL&hash=item3f006…

    ... system but fails on the 12V the drive needs, and that ...
    Metalbrain Metalbrain June 2010 Chit chat
  • grey +2 psu on an original 128?I have a 128 and both +2's.. a / b.. I notice one PSU is the same as the 128 , just grey and the 128 PSU I have is, well I will get it looked at .. i…

    ... , +12V 700mA, -12V 50mA
    ZX+2A/B: 5V 2A, +12V 200mA, -12V 50mA ...
    TMX TMX June 2010 Hardware
  • +3 needs putting out of its misery[URL="http://cgi.ebay.co.uk/SINCLAIR-ZX-SPECTRUM-3-128K-FDD-GAMES-CLASSIC-VINTAGE-/270590074074?cmd=ViewItem&pt=UK_VintageComputing_RL&hash=item3f006…

    ... system but fails on the 12V the drive needs, and that ...
    brownb2 brownb2 June 2010 Chit chat
  • testing if speccy is fully functionalHi, There is so much mention of T states but still confused. Does this mean if an instructin is out by a T-state or more then the speccy is faulty?…

    ... to check the +5V/-5V/+12V lines though.

    Between ...
    Spirantho Spirantho June 2010 Sinclair Miscellaneous
  • Amstrad MP3 TunerNot Spectrum related but may be of use to someone. Seems like the MP3 Tuner for CPC computers is pinned the same as the output of CPC's: 6 pin DIN,…

    ... You will need an additional 12V power source.

    [QUOTE ...
    TMX TMX June 2010 Hardware
  • +3 psu schematics and partsHi everyone. Does anyone have or knows where to get the +3 psu schematic? I'm trying to repair one but i cant find any info on the parts reference. …

    ... it's more likely a 12V zener diode.

    A ...
    TMX TMX June 2010 Hardware
  • +3 psu schematics and partsHi everyone. Does anyone have or knows where to get the +3 psu schematic? I'm trying to repair one but i cant find any info on the parts reference. …

    ... . Your are completely right with -12v signal. The 4x1n4001 and C8 ...
    Jose_Leandro Jose_Leandro June 2010 Hardware
  • +3 psu schematics and partsHi everyone. Does anyone have or knows where to get the +3 psu schematic? I'm trying to repair one but i cant find any info on the parts reference. …

    The -12V supply is correct, no need to change, negative pin of C2, C8 have to connect -12V signal.
    For R6, middle pin (pin3) have to connect either pin 1 or pin 2.
    superfo superfo June 2010 Hardware
  • 7805 Regulator HelpI am hoping to replace the 7805 regulator in my issue 3 48K Spectrum soon. Unfortunately I don't know exactly what to buy to replace it with (my fat…

    ... supply). The rather easily damaged +12v / -5v circuit on the Spectrum ...
    Winston Winston June 2010 Hardware
  • 7805 Regulator HelpI am hoping to replace the 7805 regulator in my issue 3 48K Spectrum soon. Unfortunately I don't know exactly what to buy to replace it with (my fat…

    ... supply). The rather easily damaged +12v / -5v circuit on the Spectrum ...
    Alien 8 Alien 8 June 2010 Hardware
  • Digital RadioWell, it looks like the switchover to digital radio may be delayed (it is planned for 2015) due to the slow uptake of DAB systems. A report by the BB…

    ... it must be supplied with 12v, thankfully this can be supplied ...
    Scottie_uk Scottie_uk July 2010 Chit chat
  • 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, …

    ... to check the -5V and +12V lines for me...
    Spirantho Spirantho July 2010 Hardware
  • Issue 2 issue (...)Just acquired an issue 2 Spectrum 48 K, selled as working board, not working keyboard. Before testing it with a psu I opened the case and discovered …

    ... /resistor mod : 4k7 resistor from +12V to pin 30 on IC2 ...
    Cignale Cignale July 2010 Hardware
  • Issue 2 issue (...)Just acquired an issue 2 Spectrum 48 K, selled as working board, not working keyboard. Before testing it with a psu I opened the case and discovered …

    ... /resistor mod : 4k7 resistor from +12V to pin 30 on IC2 ...
    Cignale Cignale July 2010 Hardware
  • Issue 2 issue (...)Just acquired an issue 2 Spectrum 48 K, selled as working board, not working keyboard. Before testing it with a psu I opened the case and discovered …

    ... IC(x) pin(y) to +12V" (instead of+5V) I do ... see no reason for using +12V there, the 'intermediary' resistor offers ...
    roko roko July 2010 Hardware
  • Issue 2 issue (...)Just acquired an issue 2 Spectrum 48 K, selled as working board, not working keyboard. Before testing it with a psu I opened the case and discovered …

    ... is low). BTW: indeed not 12V but 5V!!

    Edit ...
    roko roko July 2010 Hardware
  • Issue 2 issue (...)Just acquired an issue 2 Spectrum 48 K, selled as working board, not working keyboard. Before testing it with a psu I opened the case and discovered …

    ... Z80's A0 line and +12V. Indeed the repair guide (page ... 4.5) says 12V, where I think +5V should ... patch using 5V instead(!) of 12V, R=3K9, just for noticing ...
    roko roko July 2010 Hardware
  • Schematics for loading amplifier?I'm interrested in making an external portable amplifier in order to be able to load speccy games using an mp3 player. I looked in the internet but c…

    ... says it works with 4-12V so a 9V alkaline battery ... Power Supply Voltage : DC 4 - 12V.
    PCB Size : 50 x ...
    gtsamour gtsamour July 2010 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, …

    ... are sure you miss the 12V and the -5V.

    ingo ingo August 2010 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, …

    ... are sure you miss the 12V and the -5V.

    josteint josteint August 2010 Hardware
  • newbie: on/off and video outputHello, having a lot of 8bit computer I tried the scart cables I have one gave me a scrolling image the other one gave me a good picture but no sound …

    ... the switch on +5V and +12V would give less 'shock' when ...
    orange orange August 2010 Hardware
  • Sir Clive - *** machine, or washing machine engine?It surprised me in Micro-Men to see Sir-Clive as having a bit of an eye for the ladies. Are there any rumours about if this was a regular thing with …

    ... brushed DC motor running off 12V DC.

    The C5 ...
    Winston Winston August 2010 Chit chat
  • Sir Clive - *** machine, or washing machine engine?It surprised me in Micro-Men to see Sir-Clive as having a bit of an eye for the ladies. Are there any rumours about if this was a regular thing with …

    [QUOTE=Winston;467852]I'm afraid that's urban legend. Washing machine motors are a different type (synchronous brushless AC motors that run on 240V AC), but the C5 had a brushed DC motor running off 12V DC.
    [/QUOTE]

    :-o doh!
    takapa takapa August 2010 Chit chat
<1…18192021222324…34>

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