Zx spectrum issue 2 In August 2020, chafing under Czech lockdown, we got a second chance to get the modernized version. Post your memories and celebrate 38 years of the Speccy here. Aug 13, 2020 · The ZX Spectrum Next Issue 2 has raised nearly £900,000 - far beyond its £250,000 goal - with 28 days of fundraising left to go. The Retro Sinclair Spectrum is truly a piece of home computing history and can make for a nice addition to any collection. It was one of the all-time bestselling British computers with over five million units sold. The last is the upper RAM multiplexor (Amstrad part number 40058), the same part as the PCF1306P / ZX8401 introduced in the issue 5 48K Spectrum, and also used on the 6A Spectrum and the 128K Toastrack. It was first released in the United Kingdom on 23 April 1982. The classic rubber keyed Sinclair ZX Spectrum came in many versions. 128k memory expansion for ZX Spectrum and Didaktik Gama: description and files 128k memory expansion for Didaktik Kompakt and M: description and files Umbrella modification (unrainer for 128k, hack for 48k): description and files Memory & bank map: description and files. This followed the Issue 1 quite quickly in August of 1982, and was the first Spectrum issue to be laid out using CAD tools. Jul 17, 2025 · But here they are! The Sinclair ZX Spectrum Next Issue 3 is our most powerful Speccy yet, and now includes new fully licensed cores for the Sinclair QL and… The Commodore 64. Featuring colour and sound, and a lot more memory, it paved the way for home computer games as we know them today. Then check IC6 pin 8 - should be +12V DC. This one is unusual being a factory made 48k. Jan 19, 2024 · The ZX Spectrum Next is a modern recreation – and, crucially, improved version – of the classic British home computer, Sinclair Research's ZX Spectrum. Production of the first motherboard (Issue 2A) started in November of the same year. Aug 21, 2023 · The first mainstream UK-spec 128 machine, manufactured by Samsung. Jun 26, 2017 · Next is the Z80 CPU, they were mainly using original Zilog parts on the +2. Its main distinguishing feature from the 6U is that it has green solder mask on both sides of the PCB, and uses similarly sourced components to that found in the 48K Issue 4S. Se cambian bobina L1 y TR4 y el patrón cambia. 2, Issue 0, Issue 1, Issue 2, Issue 2B (Kickstarter 1), Issue 2D, Issue 2E, Issue 2H (soon to be Issue 4 – Kickstarter 2) The Spectrum Next is an expanded and updated version of the ZX Spectrum, fully compatible (hardware and software) with the original. kickstarter. Every owner of the former version who continued using it, inevitably ended up wanting the upgrade to the latter. ). ZX SPECTRUM desktop pdf manual download. ZX Spectrum Next - Issue 2 A project in London, UK by Henrique Olifiers Functional differences ZX Spectrum 48K issue 2 boards require manual trimming of some video output parts. The 'traditional' explanation of the difference between Issue 2 and 3 Spectrum (from techinfo. Because of the age of this item, it is sold as a collector’s/display piece only. It also has enhanced capabilities. [1][2] It is intended to appeal to retrocomputing enthusiasts and to "encourage a new generation of bedroom coders", according to project member Jim Bagley. No floppy controller circuitry. Recently I've bought a 16k speccy and ran into some issues with it. Case moulds were produced in April 2018, final motherboards (Issue 2B) in August. This one had issues with video, RAM and a br This issue was fixed in later models of the Spectrum. They are all axial types unless otherwise indicated, and all 85°C type unless otherwise indicated. I have found no the gerbers for the issue 2 board online but issue 3 boards are out there. Forty-two years ago, The Reg FOSS desk cut its computing teeth on a ZX Spectrum 48. 5 mil (US$2. If you don’t know what recapping your Spectrum means or why it’s important, I’ll first explain a few details. The large zig-zag shaped heat sink on the right of the circuit board is a feature shared with the latter Issue 2, but the key difference is in the memory. It has a refurbished Issue 3B … Funding period Aug 11, 2020 - Sep 10, 2020 (30 days) Jul 19, 2025 · I have inherited a pair of 48k Sinclair ZX Spectrums. Many official and unofficial clones were released around the world in the following years, most notably in Europe, the United States, and Eastern Bloc countries. To do this properly, an oscilloscope is required. Jul 21, 2015 · The new kick-starter for the ZX Spectrum NEXT here: https://www. Discussions about other Sinclair computers are also welcome. It not only run vintage games from the 1980s but comes with everything you need to write your own games and programs with NextBASIC and full C support. Issue 1 was the original version of the Spectrum, released in 1982. Précis Whilst fixing the Stunt Spectrum I noticed that the clock (CLK) voltages Jul 7, 2021 · A while back I got my hands on my first Sinclair ZX Spectrum 128k+2 (grey), yet another 1980s 8-bit computer to add to my collection. This manual is for use by authorised Sinclair dealers, engineers and representatives as a guide to rectifying f a u l t s on the ZX Spectrum personal computer. With new video modes, co-processors, more colours, sound channels, faster speeds, large storage and networking capabilities, the Spectrum Next leads the way for a generation of new games and apps ATOMBBC MICROELECTRON NES / FAMICOMSNES / SUPER FAMICOMGAME BOYDSNINTENDO 64GAME CUBE APPLE ][CAMPUTERS LYNXDRAGON 32 AND 64MSXPSION ORGANISERPSION SERIES 3SEGA MEGADRIVESEGA SATURNSONY PLAYSTATIONHP PALMTOPS ZX Spectrum 16K/48K Issue 2 Board Schematics Spectrum +2 boards: Issue 1 = Spectrum +2. The products and services mentioned within are no longer available. 81K subscribers 73 This is *ZX Spectrum Next - Issue 2* released in *2023*. It covers common failure symptoms, diagnostic procedures, and fixes for: Repair and restoration of a donated rubber key Sinclair ZX Spectrum 16k (upgraded to 48k by the previous owner). ZX Spectrum desktop pdf manual download. Jul 20, 2025 · A third Kickstarter seems likely to be the final campaign for the ZX Spectrum Next, which had its first run in 2017 and a second in 2020. The +3 has an integrated 3″ single sided floppy disc drive. Yep, you read that right, the Next Issue 3 can run all the software for the Sinclair QL and the C64 straight out of the box. The +2A case was black, however. There is a 14MHz oscillator which is divided internally by the ULA (with a D-type flip flop for a cleaner signal) to provide a 7MHz pixel clock. Forty-two years ago, The Reg FOSS desk cut its … This schematic describes the circuit of a +2B with a Z70833 ISSUE 2 Motherboard. When choosing replacement capacitors, the important part to match is the capacitance (1uf, 22uf etc. Some boards have the capacitor C53 fitted and some have a capacitor soldered to the underside of the board or CPU. Spectrum Repairs and Modifications serviceGenuine TRACO switch mode 7805 Replacement module Quality, genuine TRACO brand switch mode voltage regulator. The excitement of finding it quickly turned into a mix of curiosity and dread once I opened it up. It was housed in a keyboard casing made in the former Yugoslavia, with keys produced by a Slovenian company (IEVT). Redrawn schematics in PDF format for the Spectrum +2A/+3, +2B, and +3B which fix several errors — based on the schematic from the Amstrad +2B/+3B Service Manual. Also for: Zx spectrum+. Aug 20, 2023 · RetroSix WikiBelow are several schematics for the various ZX Spectrum 128 models. Complete units start at about $400 and there's options to upgrade the original two ZX Spectrum Next's, board-only options Retro Isle - Retro games spectrum commodore amstrad ZX Spectrum Next piles a ton of features from good computers back to the Spectrum. It could produce 15 different colors at a resolution of 256×192. Keyboards were finalized in November 2019, delayed due to problems with shifted keys (e. The Spectrum played a pivotal role in the history of personal computers and video games, especially in the United Kingdom. However, we do recommend recapping your ZX Spectrum to keep it running properly for years to come. Aug 9, 2025 · Henrique Olifiers is raising funds for ZX Spectrum Next - Issue 2 on Kickstarter! The ZX Spectrum Next: The Evolution of the ZX Spectrum Computer. 2) Check the voltage regulator output (+ve side of C34) - should be +5V DC +/- 0. 0 mil) stretch goal with only four days remaining on the campaign Feb 19, 2017 · Sunday, 19 February 2017 ZX Spectrum Issue 2 Repair This is an old post, preserved for reference. Albrecht Case design: Rick Dickinson Dimensions: 330 × 147 × 27 mm (feet adds 2 mm; keys or R-Pi HDMI adds 2 mm) Height Jan 19, 2024 · The ZX Spectrum Next is a modern recreation – and, crucially, improved version – of the classic British home computer, Sinclair Research's ZX Spectrum. Sinclair ZX Spectrum Issue 2 Released in 1982 the Sinclair ZX Spectrum (pronounced zed-x) was the second home computer released from the mind of British inventor and entrepreneur the late Sir Clive Sinclair who founded 'Sinclair Radionics' then later 'Sinclair Research Ltd'. doc) is that PRINT IN 254 gives bit 6 reset on an Issue 3 and set on an Issue 2 machine occurs because, as PRINT IN 254 is typed at a BASIC prompt, the speaker is called for every keystroke, and the ROM beep routine contains a OR 8 before OUT (0xfe),A Henrique Olifiers is raising funds for ZX Spectrum Next Issue 3 on Kickstarter! The Sinclair ZX Spectrum Next: the evolution of the Speccy computer, now expanded into the world of the Sinclair QL, C64 and Upgrading a 16K Spectrum to 48K is normally fairly straightforward and is mostly plug and play. Tras 5 minutos la ULA quema. Rated 5 volt @ 1 Amp output (tested well over 1. Der ZX Spectrum Next Issue 2 ist vollständig kompatibel mit dem Spectrum 48, 128, +2, +3 und sogar einigen Nachbauten, wie dem russischen Pentagon. No hay tensión de -5V y no se aprecia el zumbido de la bobina L1. Below, we’ll explore each model, listing their notable features, release dates, and key differences. Technical References and Documentation ZX Spectrum Service Manual (includes Supplement No. 99 on eBay. The ZX Spectrum (UK: / zɛd ɛks /) is an 8-bit home computer developed and marketed by Sinclair Research. Upon receipt I quickly tested it. The circuit that generates the voltages for the lower Finally, in 1987, came the ZX Spectrum +3 with a built-in 3" disk drive, and the ZX Spectrum +2A, which had the same circuit board as the +3, but instead of the disk drive the +2A had a cassette deck just like the earlier +2. Aug 11, 2016 · 6C001E-7: ZX Spectrum Issue 4A boards (and higher board issues) For the exact differences I recommend to buy “The ZX Spectrum ULA – How To Design A Microcomputer” (ISBN 978-0-9565071-0-5) by Chris Smith yourself. Referred to during development as the ZX81 Colour and ZX82, the machine was launched as the ZX Spectrum by Sinclair to highlight the machine's colour display, compared with the black It's not often you get to see an Issue 1 Sinclair ZX Spectrum. Putting the Next Issue 2 through its paces with a few games, showing off some features, how simple and powerful the new computer is. Jul 21, 2025 · The ZX Spectrum Next Issue 3 is here, bringing FPGA power, new cores, and C64 compatibility. In order from top left – Original TBBlue 1. View and Download Sinclair Research ZX SPECTRUM servicing manual online. Spectrum +2A/+3. g. This one is issue 2, the first one produced in any volume. Reparación: Se cambia TR4 y vuelve a fallar. View and Download Sinclair ZX Spectrum service manual online. The "flash" attribute of the ZX Spectrum's display, designed to swap ink (foreground) and paper (background) colours in any 8×8 attribute block that enable it, suffers from a timing issue, in that the inversion of the display's bitmap data is not properly synchronised with pixel boundaries. The term ‘recapping’ means the process of replacing the electrolytic capacitors in your Spectrum. You may wish to apply these whilst re-capping / refurbishing if they’re not already present. We have a great online selection at the lowest prices with Fast & Free shipping on many items! Sinclair came up with various modifications to their Issue 2 Spectrum PCBs which were often applied if they came in for servicing. Which ZX Spectrum board issue is the best? Nov 5, 2025 · The Sinclair ZX Spectrum Next Issue 3 is coming to Kickstarter this Saturday July 17, 2025 Carlos Henrique Olifiers Off Hero Article, This is it: the Sinclair ZX Spectrum Next crowdfunding campaign you’ve been waiting for is Here you’ll find schematic and layout information for various models of the ZX Spectrum. Initially, in April 1982, there were two models available: The Spectrum 16K, available for £125 and the In this episode of "Unboxings", I'm unboxing the ZX Spectrum Next Issue 2 by Henrique Olifiers. Ian's Reference ZX Spectrum 16/48K This was my on going interest and research in the ZX Spectrum, partly using it to learn electronics a bit better. Zur Emulation wird ein FPGA eingesetzt. See full list on spectrumforeveryone. Sinclair ZX Spectrum +2 Brand: Amstrad Consumer Electronics Plc. That didn’t make much difference, so I boxed it and parked it up for another day. The Due to a different PCB design, the issues caused by capacitors not performing correctly don’t really affect the Spectrum 128k, +2, +3 and +2A ZX Spectrum. For the Sinclair ZX Spectrum. Aug 14, 2020 · Your Retro Repair #2 - ZX Spectrum Issue 2 - Power Issues and RAM Replacement Happy Little Diodes 6. Please use this information at your own risk! Last Updated: 31/01/2022 I started out with broken issue 2 boards from eBay, but they proved a bit fragile. In this video we are repairing an Issue 2 48k with bad video and a broken keyboard. I had a quick look at it and decided the electrolytic capacitors were not in the best state, so recapped it. Spectrum +2B and +3 boards: Issue 1 = 1987. Aug 20, 2023 · Unlabeled file ZX Spectrum 16-48k Issue 2. Jun 25, 2025 · Original Story: Based on FPGA technology and designed to run both past and next-generation Spectrum software, the ZX Spectrum Next may be a niche proposition, but it has found plenty of fans in Sinclair fandom—the only problem is that it's incredibly hard to get hold of one as they're not mass-produced. Another Day… I’m currently in the Modified from Wikipedia' ' The ZX Spectrum (the "Z" is pronounced "Zed" in its original British English branding) is an 8-bit personal home computer released in the United Kingdom in 1982 by Sinclair Research Ltd. First a series 2 with (at least) a bad ULA and a lifted trace to the Z80, and a series 6a with nearly everything fried… Believe it or not, I think I stand a better chance of getting the 6a running, so I started with that one. Si quieres reparar tu Spectrum y no eres un experto, este es tu canal. This third production run includes a more powerful FPGA, as well as new cores for the Sinclair QL and Commodore 64. involved - just some soldering. ZX Spectrum issue 2 has only blue tints by Archive » Fri Jun 28, 2019 5:13 am In the UK, the ZX Spectrum was by far the most widely known home computer of the 1980s - sold in their millions, it was truly a major upgrade over the ZX81 it replaced. The ZX Spectrum (UK: /zɛd ɛks/) is an 8-bit home computer developed and marketed by Sinclair Research. Model: ZX Spectrum +2 Country of origin: United Kingdom Made in: Taiwan (also United Kingdom) First year of production: 1986 Price: £149 Dimensions: 439 × 174 × 38-56 mm (feet adds 2 mm) Weight: 1693 g The first of the Amstrad-made Spectrums in a non-Sinclair fasion grey case . Oct 15, 2024 · I’ve covered the ZX Spectrum clock in previous posts from an operational perspective. For the 48K Issue 1, the remaining 32K is carried on a small daughter board ZX Spectrum issue 2 has only blue tints by Archive » Fri Jun 28, 2019 5:13 am posted by relo999 on Aug 18, 2015: Considering Spectrum world fora seem to be dead, or near death, I think this is the best place to ask this. The ZX Spectrum Next is an 8-bit home computer, initially released in 2017, which is compatible with software and hardware for the 1982 ZX Spectrum. We will also explore some of the modifications that have been made to th Capacitor Lists (48K Range) The following lists describe the replacement capacitors required for all machines in the Spectrum 16/48K range. 1 – Issue 3B to 6A, and Supplement No. A lot of this information now corresponds to Sinclair Spectrum 48K Motherboard UK/PAL Issue 2 *With Sinclair ULA* Re-capped (with blue axial caps) and modded to deliver composite video instead of RF. ZX Spectrum 48K (Issue 3B) with video issues (Part 1)Time to try my luck on another ZX Spectrum repair, this time a ZX Spectrum 48K with an issue 3b motherboard. In the Issue 2 Spectrum the level shifting network is passive, incorporating two potentiometers VR1, VR2. Storage, sound, sprites, no color clash, real keyboard, things owners used to vigorously argue were not important back in the day on the playground. This is basically four 74LS157 style multiplexors and some glue logic. First check IC6 pin 9 - should be +5V DC +/- 0. (I get the impression it The ZX Spectrum from Sinclair Research was introduced in 1982 and sold up until 1992, becoming the bestselling home computer in the UK until it lost its title to the Raspberry Pi. Issue 3 = Spectrum +2. Instead, the team behind the system have held crowdfunding campaigns to raise the cash ZX Spectrum Issue 2 (From Your Spectrum, issue 3) Spectrum 48K versions | Spectrum Issue 3 Aug 13, 2020 · The ZX Spectrum Next Issue 2 has raised nearly £900,000 - far beyond its £250,000 goal - with 28 days of fundraising left to go. This is a 1st look at the contents an Brand: SpecNext Ltd. 16/48K Family Issue 1 Schematics and Layout (pdf) Issue 2 Schematics and Layout Issue 3 Schematics and Layout Issue 3B Schematics and Layout Issue 4A and 4B Schematics, Issue 4A Layout Issue 5 Schematics and Layout Issue 6A Schematics and Layout 128/Grey +2 Family 128 Issue 6U, analogue and digital side The manual refers principally to the Issue 2 and Issue 3 Spectrums but provides a background to the Issue 1 version in the section dealing with modification history. Spectrum Computing July/August 1983 - Issue #2. Its proving a real frustration to fix. 5 Amps) Suitable for Spectrum 16/48 motherboard issues 3-6 (and issue 2 but only when it is used in a Spectrum Plus case as there's not Jan 19, 2024 · The ZX Spectrum Next is a modern recreation – and, crucially, improved version – of the classic British home computer, Sinclair Research's ZX Spectrum. It smashed Kickstarter in minutes and it’s not done yet. Even with perfect calibration, the picture is often not as bright as with an issue 3 or up board. The time now is 2:53 pm. Dispositivo: ZX Spectrum issue 2 Avería: Imagen azulada con cuadros de color estáticos. In this video we unbox my Kickstater delivery ZX Spectrum Next and take you on a quick tour around it Although the ZX Spectrum 128K heat sink model and the grey ZX Spectrum +2 have a composite video-out signal on pin 1 of the RGB connector, the ZX Spectrum +2A, +2B and +3 are missing this feature. It is a significant redesign from the original ZX Spectrum 128 and ZX Spectrum +2 models, with additional memory paging capabilities to support CP/M and additional ROM containing the +3DOS disc operating system code. Wait for an invoice to be sent to you. The Kickstarter campaign started in April 2017. 5 by the Spectrum community to distinguish them from the later issue 2 board. Drop in replacement for linear 7805 - no heatsink required. Part number Z70500. Basic knowledge of ZX SPECTRUM operating procedures is assumed as is knowledge of current workshop practice relating to microcomputers. ZX Spectrum Repairing a ZX Spectrum Re-capping info A Diagnostic Test ROM for the Spectrum Some Notes Regarding Problems When Loading Games Issue 2 PCB modifications How to replace a (faulty) Spectrum ROM with an EPROM. These are only very sporadically available on eBay, and can be The ZX Spectrum motherboard is fairly straightforward by modern standards: Integrated Circuits Most of the chips are soldered to the board, with the exception of the ROM and the ULA Discrete Component Values I’ve highlighted the most common parts that fail and may need replacing during ownership Note: Please note The board pictured (an Issue 2, 48K) is the model that I currently own. The ZX Spectrum +3 was released on the 16th of May 1987. Jan 14, 2025 · The ZX Spectrum Next is a modern recreation - and, crucially, improved version - of the classic British home computer, Sinclair Research's ZX Spectrum. 3) Check the on-board power supply outputs. It was released in the UK on 23 April 1982, the United States in 1983, and Aug 6, 2021 · The ZX Spectrum Next Issue 2 (which sold out within an hour) started at £280 for the early-bird Next Plus with 1Mb RAM, RGB/VGA/HDMI out, 7/14/28Mhz Turbo modes, accelerator port, SD card, PSU, Printed Manual, Wi-Fi module and Real Time Clock. The section of RAM can be disabled to check if the computer works OK as a 16K machine (see in-depth guide links below). Jan 20, 2017 · ZX Spectrum Issue 2 Testing with DivMMC Future This is an old post, preserved for reference. Issue 2 = 1987. THIS CASSETTE HAS NOT BEEN TESTED. As part of the testing of the DivMMC future, we tried to use a range of machines of all different types and conditions. The original line produced by Sinclair. Part number Z70830. Project's KickStarter Page: https://www. The first issue to sort out seems to be an addressing issue with Feb 3, 2021 · A Sinclair ZX Spectrum Issue 3B with DC-DC Circuit ModificationRefurbished by PopeyMon Games and Fun Above is the inside of a Sinclair ZX Spectrum, the Spectrum Plus. Do check first whether or not your machine falls into one of these two camps though: Your machine is an Issue 1 – in this case a daughterboard is required to carry the extra 32K of RAM as no provision is made for it on the main PCB. This revision had the 3 transistors wired the wrong way. Even more rare to repair one!In this video I diagnose what looks very much like a faulty ULA b Jul 21, 2025 · The ZX Spectrum Next Issue 3 is a modern reboot of the classic Sinclair ZX Spectrum that uses the Artix A7 XC7A35T chip for emulation. com It's finally here! After a long 3-year wait, the ZX Spectrum Next Issue 2 has landed, and I'm beyond excited to unbox it with you during this livestream! Joi Aug 20, 2023 · Obviously, this is an issue 2 Spectrum, so the screen is either going to be greeny-yellow or bluey-yellow, but that can be fixed. pdf), Text File (. 3 Design fault on +2 issue 3 There is a major design-fault on the Spectrum +2 (grey model) issue 3 (issue 1’s doesn’t seem to have this problem): all 2N3904 transistors (3 pieces) are mounted incorrectly. 25V with no discernable ripple. These are C44 and C45, and are rated at 100uf at up to 16v. I've dug this one out to answer a question posed on twitter: Jan 3, 2024 · The ZX Spectrum was initially sold in 16 and 48K versions. Get the best deals for Issue 2 ZX Spectrum at eBay. Replace *all* the parts! Here’s what has been replaced in the 6a so far: Bad voltage regulator – replaced with The modifications are by the manufacturer to fix a bug in the ULA, the custom chip in the spectrum. For the later "Black +2" (+2A and +2B) see ZX Spectrum +3/2A/2B Help needed on ZX Spectrum issue 1 Hi, I have been reading up on the ZX Spectrum issue 1 and understand that the keyboard is of a lighter gray than the later issues. Upper RAM faults: Symptom: Spectrum only works as 16K machine / Boots but crashes when playing games etc. Shift+2 Apr 23, 2022 · First thing to find out: is this a problem with the Spectrum or a compatibility issue with my TV? I've read about some picky TV's having trouble displaying color of a Speccy. It's finally here! After a long 3-year wait, the ZX Spectrum Next Issue 2 has landed, and I'm beyond excited to unbox it with you during this livestream! Join me as I rip off the plastic, explore Henrique Olifiers is raising funds for ZX Spectrum Next on Kickstarter! The ZX Spectrum reborn: a new machine, fully compatible with the original computer, and packed with improvements and expansions. Cost reduced versions of the 128 architecture with some incompatibilities. Shift+2 Aug 12, 2020 · “The ZX Spectrum Next Issue 2 is fully compatible with the original Spectrum 48, 128, +2, +3 and even some clones such as the Russian Pentagon, allowing it to run virtually every piece of Early issue 2 boards such as this, that use parts left over from issue 1 production are dubbed issue 1. This is further divided to provide a 3. The exact value of a given ZX Spectrum model will depend on the condition it is in and whether it’s still in working order. pdf Issue 3 Layout Issue 3b Issue 3b Layout Aug 12, 2020 · “The ZX Spectrum Next Issue 2 is fully compatible with the original Spectrum 48, 128, +2, +3 and even some clones such as the Russian Pentagon, allowing it to run virtually every piece of Early issue 2 boards such as this, that use parts left over from issue 1 production are dubbed issue 1. For the second Kickstarter campaign (called "ZX Spectrum Next Issue 2") which was started at 9pm BST on 11th August 2020, the goal remained the same as the first: £250,000. These are required to set-up the chroma bias level on IC14 pin 3 such that the voltage difference measured between pin 3 and the colour difference signals on pins 2 and 3 respectively in nominally 0V dc. It's called the “spider” mod, and it shows that your spectrum is probably an issue 2 board. txt) or read online for free. Key Takeaways The ZX Spectrum was an influential 8-bit home computer released in UK in 1982 Common issues include failed power supply, dead sound, video problems Fixing these requires soldering skills and some electronics knowledge Replacing capacitors, transistors, and fuses are common repairs DIY restores involve cleaning case, keyboard, and motherboard Recapping, retrobrighting, and The manual refers principally to the Issue 2 and Issue 3 Spectrums but provides a background to the Issue 1 version in the section dealing with modification history. It also has provision for the full 48K of RAM on the main PCB. Aug 13, 2020 · This is how much it took for Issue 2 of the ZX Spectrum Next Kickstarter campaign to be funded. The grey +2 was Amstrad’s first machine and was heavily derived from the 128 architecture. Even earlier boards had an even more drastic mod called “the dead cockroach”. Essential modifications are required on some Issue 2 Spectrums. First produced for Investronica of Spain, later released in UK. (Incidentally, the parts required are now included as standard in my Spectrum re-capping kits) DC-DC converter mod. This PCB replaces the RF modulatorbox on a Sinclair ZX Spectrum computer. Sinclair Zx Spectrum 48K Service Manual - Free download as PDF File (. After 3 years of waiting the new ZX Spectrum Next Issue 2 has arrived after all sorts of problems with the production. Spectrum 128/Grey +2. After nearly giving up on this old ZX Spectrum in the last video and an onslaught of comments, I decided to give the machine some attention and see what I co The ZX Spectrum (pronounced "Zed-Ex" from its original British English branding) is an 8-bit personal home computer released in the United Kingdom in 1982 by Sinclair Research Ltd. Tensión de -5V This followed the Issue 1 quite quickly in August of 1982, and was the first Spectrum issue to be laid out using CAD tools. com/projects/spectrumnext/zx-spectrum-next-issue-2 And yes, you are too late for the Early Bird price, that was gone after 45 seconds Aug 20, 2021 · ZX Spectrum Issue 2 / new TVs Vintage ComputersAll times are GMT. Jan 30, 2012 · I have another ZX spectrum issue 2 board which I am convinced has some intermittant breaks in traces. Composite Video Mods Problems with replacement Spectrum Plus Membranes Sep 23, 2024 · A couple of years ago I bought a Spectrum Issue 2 motherboard from eBay, sold for spares-or-repairs with “faulty colour”. Capacitors typically found inside a ZX Spectrum. It's all well and good if I see them side by side, but when it's just a single picture on eBay for instance, I cannot really tell due to the lighting. I moved on to PABB Issue 3B boards from PCBWay. The upper 32K of RAM in the Spectrum is situated in chips IC15-IC22 – one (or more) of these is probably faulty. The machine was in good condition and came with several accesso… Aug 21, 2023 · Spectrum 16/48K Family. If you find any, please let me know: ula@bytedelight. It is based on a Zilog Z80A 8-bit microprocessor and came with 16 or 48 KB of RAM. Issue 4 = Spectrum +2B. Nov 25, 2024 · More webpages about the ZX Spectrum ULA: ZX Spectrum ULA differences ZX Spectrum ULA Types There are probably errors on this page. Part number Z70833. 2 – Spectrum+ Description and Upgrade Procedure) ZX Interface 1, Interface 2 and Microdrive Service Manual ZX Printer Service Manual ZX Spectrum 128 Service Manual ZX Spectrum +2 Service Manual (Grey model with A line at the left side corresponds to bit 7 (IC13 on issue 2 and above boards) and each pixel to the right corresponds to the next chip along – to bit 0 (IC6). On +2B floppy controller circuitry is absent. Capacitor Lists (48K Range) The following lists describe the replacement capacitors required for all machines in the Spectrum 16/48K range. Reparo ordenadores de 8 bits, paso a paso y explicándolo para que todo el mundo lo ent The ZX Spectrum Next is the evolution of the original Spectrum offering a wide variety of both old and new features. Mar 29, 2023 · A few simple mods which improve ZX Spectrum +2 user experience and functionality while being fully reversible if you want to restore the ol' Speccy to original state. This is not only remarkable in itself, since the minimum amount was set to 250 thousand UK Pounds, but it sounds literally incredible if you consider that at present, with 28 days to go, we already reached over 919K (well over a million euros). Jul 23, 2025 · The team behind the FPGA-based ZX Spectrum Next has just successfully funded a follow-up Kickstarter. Sep 6, 2020 · The ZX Spectrum Next issue 2, a modern remake of the classic personal computer has almost achieved their final £1. Sep 27, 2017 · Issue 2 with 5C112E ULA, but TR6/Spider mod is implemented next to upper memory, not over the CPU – typical of ZX Spectrum’s manufactured by Datatech. com/projec Retro Sinclair ZX Spectrums generally go for anywhere from £10 all the way up to £249. com. From issue 3 upwards, IMHO all boards are about equal when it comes to functions. Nov 17, 2024 · I recently got my hands on a ZX Spectrum Issue 2. (C) 2017 Ben Versteeg – ask me for distribution of content of this page please. This article is about the early "Grey +2". Issue 2B, also known as the “KS1” as it was the first KickStarter campaign. The Spectrum was sent to me for some further testing, and selected preventative maintenance. Se comprueba la bobina L1 y está en corto. If you don’t know what capacitors are, they’re the (typically May 12, 2025 · This guide provides detailed, component-level troubleshooting for the Sinclair ZX Spectrum home computer series (16K, 48K, 48K+, 128K, +2, +3). Model: ZX Spectrum Next Made in: United Kingdom First year of production: 2023 Price: £300 (RTC, Wi-Fi); £325 (RTC, Wi-Fi, Raspberry Pi Zero); £300 (SpecNext webshop) Board design: Victor Trucco, Fabio Belavenuto Software: Garry Lancaster, Alvin R. No cutting, drilling etc. It's main purpose is to improve the video output of the ZX Spectrum by seperating the luma/sync (Y) and chroma (C) signals to get rid of the dotcrawl. Has anyone come across issue 2 board gerbers? If I was to swap Oct 4, 2024 · Overview of the ZX Spectrum Lineup The ZX Spectrum series consists of various models, each with unique characteristics, improvements, or modifications from its predecessors. Displaying image for ZX Spectrum Issue 2 With ULA Modification. /CLK signal on the edge connector is correctly connected on this and all subsequent issues. Then check IC6 pin 1 - should be -5V DC. This sub is for fans of the Sinclair ZX Spectrum computer. ZX Spectrum +2 (Grey) External Tape Input PCB This is a simple PCB layout for building circuit designed by JoulesperCoulomb, please watch the video for all the details. This newer version model is currently on kickstarter and was successfully Aug 28, 2025 · So the Speccy troubleshooting continues with the Retroleum diagnostic ROM. 5MHz clock for the Z80 CPU and peripherals. The Issue 1 is essentially a 16K Spectrum, with only the first 16K actually mounted on the board. skt pkdvpryx csca gemnd znv rrkzt cscuw cxzpylg wfaavb jthuhq alwirsp oeijh wejht geykk kbft