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<1234567…34>
  • Spectrum 128 service manual.Hi, i have been looking at the speccy 128 service manual at [url]ftp://ftp.worldofspectrum.org/pub/sinclair/technical-docs/ZXSpectrum128K_Technical…

    ... looking at the speccy 128 service manual at

    [url]ftp ...
    spodula spodula December 2008 Hardware
  • Access to ZX81-Service ManualI need the ZX81-Service manual to repair my sick Zeddy. Unfortunately I don't get access to WOS documents via ftp. How can I register? For the ZX-S…

    I need the ZX81-Service manual to repair my sick Zeddy. Unfortunately I don't get access to WOS documents via ftp. How can I register?
    For the ZX-Spectrum there is a diagnostic board. Is there a similar board for the ZX81?
    HZJ HZJ September 2015 Hardware
  • +2A/+2B/+3/+3B researchdoing my redrawing/correcting of the +3 schematic I'm uncovering lots of oddities in the service manuals. I am trying to work out what really exists…

    ... lots of oddities in the service manuals.

    I ... amendment service manual.


    4) There is [U]no[/U] +2A ... built with the "+2A/+3" circuit of the +3 service manual.
    2A +3" diagram from the +3 service manual and my + ...
    guesser guesser September 2010 Hardware
  • ZX Spectrum +2b and +3b modelsI've been wondering for quite a while what the +2b and +3b were all about, as neither appear in the FAQ, but we have a service manual in the archive …

    ... FAQ, but we have a service manual in the archive covering both ... just tiny upgrades from the +2a and +3?
    Does anyone ...
    mheide mheide October 2009 Emulators
  • Schematic ErrorThere appears to be an error in the Schematic for the 128k +2A and +3 the error is present in both the redrawn TIF version and the original drawing …

    ... the Schematic for the 128k +2A and +3

    the ... the original drawing from the service manual.

    For some reason ...
    guesser guesser September 2010 Hardware
  • Microdrives and standard service modifications[url="http://www.worldofspectrum.org/pub/sinclair/technical-docs/ZXMicrodriveInterface1AndInterface2_ServiceManual.pdf"]worldofspectrum.org/pub/sincl…

    ... on page 27 of the service manual linked above.
    hedge hedge February 2018 Hardware
  • New member, dead SpeccyHallo everyone, I was directed here from a Commodore (boo, hiss) forum after pleas of aid with my newly acquired, quite dead 128k Speccy. I sincerely…

    ... exactly: Original 128K, +2, or +2a/b? You might want to ... procedures described in the corresponding service manual (they're all on WOS ... built the one for the +2a/b, and I haven't ...
    J?rg Pleumann J?rg Pleumann December 2004 Sinclair Miscellaneous
  • Awful image on 128K +2B / CV mod not workingHello, My two +2 B output a terrible image through RF. Lots of shadows and moir&#233; patterns. One is slightly better than the other, but really ba…

    ... connector should be different. The service manual is downloadable on WOS, anyway ... i have seen in other +2A's. The schematics do not ...
    odious odious August 2008 Hardware
  • Spectrum 128 service manual.Hi, i have been looking at the speccy 128 service manual at [url]ftp://ftp.worldofspectrum.org/pub/sinclair/technical-docs/ZXSpectrum128K_Technical…

    ... looking at the speccy 128 service manual at

    [url]ftp ... .[/QUOTE]

    This technical manual contain more bugs, for example ... memory layout is for +2A/+3 models, ZX128/+2 use ...
    velesoft velesoft December 2008 Hardware
  • ZX Spectrum +2b and +3b modelsI've been wondering for quite a while what the +2b and +3b were all about, as neither appear in the FAQ, but we have a service manual in the archive …

    ... FAQ, but we have a service manual in the archive covering both ... +2B is the same as +2A, but made in China instead ...
    Metalbrain Metalbrain October 2009 Emulators
  • +2A/+2B/+3/+3B researchdoing my redrawing/correcting of the +3 schematic I'm uncovering lots of oddities in the service manuals. I am trying to work out what really exists…

    ... lots of oddities in the service manuals.

    I ... amendment service manual.


    4) There is [U]no[/U] +2A ... built with the "+2A/+3" circuit of the +3 service manual.
    2A +3" diagram from the +3 service manual and my + ...
    rich_chandler rich_chandler September 2010 Hardware
  • +2A/+2B/+3/+3B researchdoing my redrawing/correcting of the +3 schematic I'm uncovering lots of oddities in the service manuals. I am trying to work out what really exists…

    ... /> version 1 is just the "+2A circuit" which is in fact ... in any service manual I've seen.

    (the "+2A/+3 circuit ...
    guesser guesser September 2010 Hardware
  • Challenging Common Knowlege: The +2A/B[I]I was going to write a big long essay about my research on this subject, but being an incredibly lazy person I never really got anywhere with that…

    ... was studying the Amstrad service manuals looking for errors ... service manual had always indicated. Having never owned a +2A ... Amendment Service Manual which details the changes made between the +2A ... 2A built onto a +3 motherboard. (As per the service manual).< ...
    guesser guesser November 2010 Sinclair Miscellaneous
  • Question about 7805 regulatorOne of my common practices when I service a ZX machine, is to replace the electrolytic caps as well as the 7805 regulator and some times the ztx650 t…

    ... ;502746]If there's a 2A regulator in there, I'd ... replace with at least 2A regulator. Only exception would be ... point, although at the service manual its mentioned a 2A 78S05, in both ... .

    From QL service guide : 78S05 2A regulator can be used ...
    gtsamour gtsamour January 2011 Hardware
  • +2 grey composite modWithout digging out the schematics, is it possible to do the composite mod like the 48k on these?

    ... - both 128/+2 nad +3/+2A/+3 have not UVY. Look ... was looking at the 128k service manual but for some bizzare reason ...
    guesser guesser March 2011 Hardware
  • New speccy modelThe 48k toastrack ;) [img]http://alistairtesting.no-ip.org/48k-toastrack.jpg[/img]

    Surprisingly both my QLs had 1A 7805 although I read somewhere that it would be better to use a 2A (78S05). In the service manual of the QL, a regular 7805 is mentioned (1A).
    So I guess the 1.5A recom would suffice.
    gtsamour gtsamour May 2011 Hardware
  • Loading games with cassette adapter - no PLAY requiredAfter several encouragingly successful experiments with the use of cassette adapters commonly used to connect a multimedia player to a cassette-only …

    ... -docs/ZXSpectrum128+2_ServiceManual.pdf]+2 service manual[/url], and it uses a ... 'd imagine the +2 and +2a/b cassette mechanisms are identical ...
    FrankT FrankT June 2011 Hardware
  • Loading games with cassette adapter - no PLAY requiredAfter several encouragingly successful experiments with the use of cassette adapters commonly used to connect a multimedia player to a cassette-only …

    ... 'd imagine the +2 and +2a/b cassette mechanisms are identical ... (grey) +2. Check both the service manual for the +2B and Steve ... have to check the other +2A and see if the situation ...
    Alessandro Grussu Alessandro Grussu June 2011 Hardware
  • +2A/+3 schematicsI have downloaded the +2A/+3 schematics and I was wondering what the history of the document is. I also have a pdf by Guesser 30/10/2010. That one …

    ... ;635382]I have downloaded the +2A/+3 schematics and I was ... are the original Amstrad +3 Service Manual scan with the lines cleaned ... the ones from the +2B service manual but drawn from scratch in ...
    guesser guesser June 2012 Hardware
  • All going well with the 3.5" driveFolks, all going well thanks to you lot on here... I now have a +3 with an external 3.5" floppy and can write .dsk images using samdisk - all very e…

    [B]Ignore the +3 Manual because it's wrong![/B]< ... /pub/sinclair/technical-docs/ZXSpectrum128+2a-+3_Schematics.png"]re-drawn schematic ... it that way in their service manual.
    What do people think ...
    guesser guesser November 2012 Hardware
  • 720K Amstrad PCW8512 drive B: as drive A: on a Spectrum +3 ?Hi Spec-chums. I happen to have a 720K drive from an Amstrad PCW8512 which i got off ebay, and i was wondering if it is possible to use it as drive …

    ... official Amstrad PCW 8256/8512 Service Manual (available here if anyone should ... the schematics of the +3/+2A/B, we can see that ...
    The_Bert The_Bert April 2013 Hardware
  • +3 Audio hates me with a passionHihi Since nobody seemed to have a spare +3B board, I've been trying to replace the audio entirely, aiming for a speaker inside the machine Since p…

    ... and Amstrad's +3B service manual. The service manual shows the 39K resistor connected ... the service manual.[/QUOTE]

    For the differences between the +2A/+3 ...
    guesser guesser April 2013 Hardware
  • ZX Spectrum +2A and +2B - finding the true factsI'm confused. Some told me that a +2A has a +3 board, and the +2B got the simplified board. But I think that is not true. I have had over a dozen b…

    ... SI-1 according to the +2A manual:

    [quote]
    2A, you should use the model ... the back of the +2A, and will support up ... the +2B/+3B Amendment Service Manual titled "Spectrum +3B Floppy ... to add externally on a +2A or +2B.

    guesser guesser December 2013 Hardware
  • Is it possible to use a +2b tape deck with a +2 grey motherboard?As per the subject really.. I've tried this and it doesn't work properly.<div><br></div><div>I can hear the tape playing through the TV but no loadin…

    If you believe the service manual, the Grey +2 pinout is ... for loading)
    On the +2A and +2B the pinout is ... the EAR socket on the +2A board and left unconnected on ... it...
    On the +2B service manual shows the "C3-4523 GEM ...
    guesser guesser May 2015 Hardware
  • Please test your ZX128+2 (grey model)Please reset your ZX128+2 (grey) and write in 128 basic (or in USR0 mode): [B]PRINT IN 32765[/B] - if basic crash (black screen) then your ZX contai…

    ... model to that of the +2A/+3, i.e. are pages ... ) documented in the 128K’s service manual?

    I guess the ...
    zub zub September 2015 Hardware
  • 128K memory bank selection to avoid contention issuesI'm currently developing a game and I'm trying to get my head around the memory contention issues of the various 128K/+2/+2A/+3 spectrum models in or…

    ... -docs/ZXSpectrum128K_TechnicalManual.pdf]128K Technical Service Manual[/url] it says that RAM ... would apply to the later +2A/+2B/+3 machines. For the ... which will give 167 for +2A/+3 or 255 for the ...
    adrian_singh adrian_singh May 2017 Development
  • ZX Spectrum +2A - problems loading from tapeI recently acquired a ZX Spectrum +2A, now the only item in my collection to be found is a [b]+2B[/b], and I got all from the MK14 to the PC200 ;-) …

    [quote="georgedb;56891"]Difference +2A and +2B: I think I ... you consider to be a +2A. Most Black +2s are the ... circuit diagram in the +3 service manual.
    guesser guesser April 2019 Hardware
  • 48K ZX Spectrum 48K Recap (Capacitors) Or Not?I have seen arguments "for an against" on this subject by some "high calibre" experts . So if the experts can differ on this question then my questi…

    ... renewed (specifically mentioned in the service manual). The remaining electrolytic capacitors are ... Spectrum 128K, ZX Spectrum+2, +2A, +2B, +3, +3B, Acorn Electron ...
    1024MAK 1024MAK October 2019 Hardware
  • ZX Interface 1Hi, I have a ZX Interface 1 which I have bought online. It does not seem to work. When using CAT1 or any other specific commands, the compute…

    ... Interface 1s. There is a service manual in the WoS technical manuals ... is NOT compatible with the 2A, 2B, 3 or 3B Amstrad ...
    1024MAK 1024MAK February 2020 Hardware
  • Wanted: +3 service manualAnyone know where I can get a copy from? Thanks

    Anyone know where I can get a copy
    from?

    Thanks
    mlasham mlasham January 2003 Sinclair Miscellaneous
<1234567…34>

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  • Spectrum 128 service manual.Hi, i have been looking at the speccy 128 service manual at <br /> <br /> [url]ftp://ftp.worldofspectrum.org/pub/sinclair/technical-docs/ZXSpectrum12…
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