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Fixing my old ZX Spectrum 48K issue 4AHi Guys, I trying to fix my old Spectrum 48K. Looks like my dad used a wrong power supply as the ULA had a bit missing and so did the 7805. So I rep…
... look into the sceme for Issue 4, then you will see that ... -
Issue 4S bad M1Never ever seen a 4S with a bad M1 line before today [url=http://postimg.org/image/o2yrigdb1/][img]http://s14.postimg.org/o2yrigdb1/IMG_1291.jpg[/img…
... . It does seem odd that issue 4 boards seem to always be ... -
Issue 4S bad M1Never ever seen a 4S with a bad M1 line before today [url=http://postimg.org/image/o2yrigdb1/][img]http://s14.postimg.org/o2yrigdb1/IMG_1291.jpg[/img…
... . It does seem odd that issue 4 boards seem to always be ... not sure it are mainly issue 4 boards, but from now I ... -
VERY loud beeper!!I recently replaced a dead beeper with another from an old set of headphones, only this is MUCH louder! Is there a way of bringing the volume down a …
The issue 5 and issue 6 schematics show TR7 collector ... the +9V rail.
Issue 3 and issue 4 schematics show TR7 collector ... it, I will check an issue 3 board that I have ... -
divMMC ENJOY wont work with 48+it works with my 48+ ver 6b with my 128+,my 128+2 128+2a 128+2b but not the ver 4 48+:confused:,the green light stays on the blue light never comes o…
... ? although i would imagine by issue 4
the faulty rom code ... swap ula`s with my issue 6b i think it is ... -
divMMC ENJOY wont work with 48+it works with my 48+ ver 6b with my 128+,my 128+2 128+2a 128+2b but not the ver 4 48+:confused:,the green light stays on the blue light never comes o…
The faulty code referencing the NMIADD routine wasn't fixed until the +3 (and subsequently the +2A).
Issue 4 and 6 48K machines both use ULA's of type 6C001E-7, so you can swap them with no issues.
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Issues with 48k spectrum and divIDEI heard you can have all kinds of issues with 48k spectrum and certain DivIDE models. Is this true and if so what should I look out for ? Only aski…
... 48K models :)
The issue is a bad /M1 line ... majority of machines affected are issue 4's, so if (by your ... to use this on an Issue 2, you should be alright ... -
what is the best way to take a metal keyboard surroundoff of a rubber keyed spectrum without damaging/bending the metal plate??
... :) These are predominantly found on issue 4 machines (in my experience), but ... can be found on issue 1/early issue 2 machines also.
Never saw that before on a black +2Today I opened a freshly arrived black +2. First I was amazed not to see an Astec HF modulator, then I spotted the "Issue two". So far I always found…
Both black +2 - Issue 2 and Issue 4, are quite common. I have ...ZX Spectrum 48K Issue 3, loss of -5V rail.Hi all, I've googled this problem and poured over the electrical diagrams for the circuitry concerning the power supplies and I believe I know what …
... .
In unmodified issue 4 and earlier issue boards, the internal voltage ...+2A: issue 1 no sound but better picture than issue 4?Hello everyone. I have a slight problem here and I am trying to figure out what could be wrong. :-( I have two spectrum +2A with two board revision…
The differences between the ISSUE 1 and ISSUE 4 versions of the +2B motherboard ... . As you already noticed the ISSUE 4 board is built up with ...ZX Spectrum 48K Issue 3, loss of -5V rail.Hi all, I've googled this problem and poured over the electrical diagrams for the circuitry concerning the power supplies and I believe I know what …
... coil is normal, especially on issue 1 and 2 machines (I ... than the later ones in issue 4 and up machines.
X=Y=ZFirst public outing of X=Y=Z for the 48K Spectrum, a 4-level demo which can be download from: [as TZX] [URL="http://www.bobs-stuff.co.uk/extras/xyzd…
To clear-up the Kempston issue: the problem actually lies in ...X=Y=ZFirst public outing of X=Y=Z for the 48K Spectrum, a 4-level demo which can be download from: [as TZX] [URL="http://www.bobs-stuff.co.uk/extras/xyzd…
... ;783957]To clear-up the Kempston issue: the problem actually lies in ...ZX Spectrum 48K AV IssueOK so I dugout my old 48K Speccy today and decided to AV mod it. I did the mod (pretty easy) but the picture I am getting is this. [url=http://posti…
... issues running it on an Issue 4 board, I think they're ... meant for the Issue 2 as mine doesn't ... play nicely with even an Issue 3... I'd recommend using ...Your Spectrum RegretsSpeccy things that you have done (or haven't done) and have regretted them since. Here's mine... (in no particular order). 1) Sold my Spectrum 128K…
... /Megadrive controller as a Kempston Joystick
4. Failed to label/catalogue ...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…
... case for one that an Issue 4 was in because it was ... that the case for the issue 2 must have been molded ...Modern PSUHello everyone, I'm looking for a modern PSU for my Spectrums and my dual set of 3.5'' floppy drive+HxC floppy emulator. The one for Spectrum should …
... improved in later issue boards (some issue 4 variants and issue 5 and later ... 14V. Also the heatsink on issue 3 and later boards is ...Smokin... more 48k woesHi, it looks like I've converted another Spectrum 48K+ into a smoke machine. I'd been rebuilding an Opus Discovery unit and everything looked good. …
... main 12V line via R62 (Issue 4), 15R. Check if it's ...What is the Sinclair ZX Spectrum Vega and what does it mean?Just stumbled upon this Indiegogo page following a tweet from SpeccyNews [url]https://www.indiegogo.com/projects/sinclair-zx-spectrum-vega[/url] it…
... family after the Amstrad built Issue 4 +2B
[QUOTE=JPickford ...Non-Ferranti ULA 6C001E-7?Hello! I don't like Iss2 boards that much but after revising one Speccy like that for a friend, the results were so positive that I decided to have …
... .
I see very few Issue 4 rubber-keys, next time I ... 't remember seeing -7 until issue 6.
All of ...Non-Ferranti ULA 6C001E-7?Hello! I don't like Iss2 boards that much but after revising one Speccy like that for a friend, the results were so positive that I decided to have …
There we are then - Issue 4 was the transition period. :)Non-Ferranti ULA 6C001E-7?Hello! I don't like Iss2 boards that much but after revising one Speccy like that for a friend, the results were so positive that I decided to have …
... STC RAM pulled from an Issue 4 (although I think this is ...Ways to identify spectrum issues with out opening them?A good while ago, I'm sure I saw some posts on here about how to identify what issue speccy you have by looking in the expansion port to see what hea…
... 6 small chips? Issue 3 to 4 then. There is ... a subtle difference that identifies these. Issue ... in jack. On issue 4 this is absent ... In summary:
Issue 1: Heatsink down side, trimmer ... small chips.
Issue 4: Heatsink along back, ...Switched voltage regulatorIn the past a replacement voor the (hot!) 7805 has popped up a couple of times in various threads. As far as I know, Recom Power Inc. was always ment…
... , I have it on a Issue 4 Spectrum 48k, where it works ...Crash Smash list?To save me having to go through all 99 mags, does there exist a list of all the "Crash Smash's", if so could you point me to it pretty please? (I h…
... in this particular case (Crash issue 4 May/1984):
[LIST ... Pogo, reviewed in the same issue?DivMMC Enjoy - I'm not enjoying it!My DivMMC Enjoy arrived today. Excitedly I rushed home to plug it into my +2a. I have quite a few SD card/CF solutions for my computers so I know wha…
... been investigating incompatibility between an issue 1 or 2 +2A and ... IC15 method used on my Issue 4 +2B, my RAM chips now ...DivMMC Enjoy - I'm not enjoying it!My DivMMC Enjoy arrived today. Excitedly I rushed home to plug it into my +2a. I have quite a few SD card/CF solutions for my computers so I know wha…
... been investigating incompatibility between an issue 1 or 2 +2A and ... IC15 method used on my Issue 4 +2B, my RAM chips now ... tryout the modification on an issue 1/2 board, just for ...48k issuesThe 48k speccy had several alterations ( issues) and I was wondering, they all seam to work ok so what was the point?<br>
... of some of the new issue boards.
Including all the ... drove the change from issue 1 to issue 2. Allowing a wider ... change from issue 2 to issue 3. The changes for issue 4, 5 and ...
