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ZX spectrum +2 issue3 (gray) videoout problemHi! Have distorted flickering image on ZX spectrum +2 gray issue3. RGB connection thru sony CXA rgb->svideo coder (Good quality! but flickering) [ur…
... hardware issue on this spectrum?
How can I repair it? Power ... fine without flickers.
Schematic [url]http://img163.imageshack.us ... -
Repairing a faulty 48K issue 2.I am investigating one of a pair of non-working issue 2 48K Spectrums that have been sitting in a cupboard untouched for quite a few years. I haven…
... a pair of non-working issue 2 48K Spectrums that
power supply
circuits on the ... -
Issue 2 voltage troubleDear all, I got my hands on an old issue 2 from a friend. Price was close to zero so I did not hesitate to take it. After powering it up I was sur…
... my hands on an old issue 2 from a friend. Price ... it more likely that the power supplies fails or that some ... -
Spectrum +3, Issue 2...I have just had plonked on my desk a nice issue 2 Spectrum +3. I'm not sure if its 100% working yet, as I have not plumbed it into a telly. So, assu…
... on my desk a nice issue 2 Spectrum +3. I'm ... board says it's an issue 2. Does this need the ... read that the "3b" is fine, is this the issue 2 +3 ... -
Repairing another Issue 2 48K Spectrum.I said at the start of the other thread that I've got another one of these and I've started investigating it. The board is more-or-less exactly the …
... the service manual suggested power supply circuit modifications haven't ... Issue 2 Spectrum.
A resistance measurement across the power ... the 4116s from their power connections to rule out ... ULA unplugged, I applied power again. The voltage readings ... -
Power Brick ProblemDear all, i was just Powering up a 48K Rubber Key Speccy using two differnt power bricks. First one from my issue 2 Speccy, second one from an issue…
... using two differnt power bricks. First one from my issue 2 Speccy ... issue 3 Speccy. Both have not caps.
With first power ... first 5 minutes, until the power brick has warmed up. Then ... -
ZX Spectrum not working... issue 4S?Hi, I've bought a "new" broken ZX Spectrum +. The idea was to put an harlequin board inside, but for the moment I'm trying to put it in working order…
... board says it is an Issue 4S.
- The computer ... doesn't only have +5v power (+12v and -5v are ... br />
It seems that power source is gone... so I ... blown as well?
- Issue 4S? In WOS docs there ... are schematics for Issue 4a and 4b, but ... -
Issue 2 ZX Spectrum 48K for saleNot on eBay this time. An 48K ZX Spectrum issue 2, working 100%. Tested with a DivIDE: no problem at all. I only needed to replace C27 because it ne…
... />
An 48K ZX Spectrum issue 2, working 100%.
Tested ... /> I'll add an original power supply and an antenna and ... -
Issue 3 Spectrum & Printer for saleI've got an Issue 3 Spectrum for sale, in perfect working order, only comes with power supply. ?25 posted or offers. And also a ZX Printer with inst…
I've got an Issue 3 Spectrum for sale, in ... working order, only comes with power supply. ?25 posted or offers ... -
Spectrum 48k Issue 4S?I just recieved a Spectrum 48K that had the bottom case from an issue 1 and the top half from a later issue, and the main board is 1983 Issue 4S. I a…
I just recieved a Spectrum 48K that had the bottom case from an issue 1 and the top half from a later issue, and the main board is 1983 Issue 4S. I am curious in what way it differs, as there are no schematic for issue 4S on this site. -
My Issue 2 spectrum"IT'S ALIVE!!!!!" - Dr Frankenstein I got my issue 2 spectrum up and running, colours and all. I borrowed socketed lower ram from my issue 3 that is…
...
I got my issue 2 spectrum up and running ... lower ram from my issue 3 that is working ... quite possible that the power issues that plagued this ... is finally fixed, my Issue 2 spectrum 48k lives ... power Z80 cpu (Nec 780008C), memory borrowed from my Issue ... -
Using an ATX power supply - Spectrum 48kOK... I have an Issue 3 48K model and the DC-DC converter does not work and I can?t make it work. :( There is a MOD to use an ATX power supply on the…
OK... I have an Issue 3 48K model and the ... MOD to use an ATX power supply on the TK90X here ... and +12V direct from the power supply to the TK mainboard ... -
Issue 2 Failed 48k to 128k upgradeI have been trying to upgrade my Issue 2 with the help of Velesoft, using this schematic; [IMG]http://i764.photobucket.com/albums/xx284/arioch1973/4…
Strange +3 HW IssueI a have a +3 with Issue 2 board system powers up ok and is useable as computer Drive works ok (tested on another machine) the drive however doesnt…
... a have a +3 with Issue 2 board
system ... same result):-
On power up drive quickly flashed the ... tested voltage on the drive power socket and its fine
48K ZX Spectrum. Issue 4A.Exclusive to WoS, not advertised anywhere else. For sale is a 48K ZX Spectrum, containing an issue 4A mainboard (in the unusual and pleasing cream c…
... 48K ZX Spectrum, containing an issue 4A mainboard (in the unusual ... can sell it with a power supply if required and probably ...ZX Spectrum Pre-regulator DesignCarrying on from the "[URL="http://www.worldofspectrum.org/forums/showthread.php?t=44486"]Issue 2 crashes after about 30 mins[/URL]" thread... [QUOT…
... reverse polarity protection and a power on LED. If you ... is the provisional circuit diagram / schematic:[IMG]http://farm4.staticflickr.com ... peripherals or expansions that draw power from the Spectrum, or ... were an issue 4, an issue 4S and an issue 6A.
Twenty years since the final issue of Your SinclairIt is now twenty years since the last official issue of Your Sinclair hit the streets - and they were few and far between. Shops around where I lived…
... years since the last official issue of Your Sinclair hit ... penultimate page of the final issue listed almost everyone who had ... and formed other magazines. Amiga Power, Arcade, and PC Zone were ... put together a fantastic tribute issue in 2004 which reproduced the ...Spectrum 48k video and keyboard issueHi all, few days ago I experimented with battery supply for my speccy (48k issue 2), and I was measuring the voltage and how much current it used. A…
... supply for my speccy (48k issue 2), and I was measuring ... short circuit at the input power plug of the speccy. The ...Which ULA to fit in which issue SpectrumI spent a little while studying the resistor changes on page 30 of the ZX Spectrum 48K service manual. They all concern aspects of the video circuit …
... board.
All issue one boards are designed for ... best operation.
Issue 3 and 3B boards are designed for ... take anything earlier.
Issue two is the board with ... although this was made after Issue two ceased production. The quick ...Power connector for 48K SpectrumI need a new power connector for an Issue Two 48K Spectrum board, quite an early one. Where can these things be obtained? Someone must know! There mu…
I need a new power connector for an Issue Two 48K Spectrum board, quite an early one. Where can these things be obtained? Someone must know! There must have been a load of these sourced for Harlequin projects, and also for Spectrum fixes.Issue 4S differencesI decided to buy an Issue 4S PCB after reading much about them on here. It was originally in a plus case which didn't come in the sale. I've been run…
... s actually different about the Issue 4S. Is it closest ... to Issue 4A or Issue 4B? As a ... The 12V and -5V power supply is much quieter than ... problem is with using the Issue 4S with Divide. So ... isn't implemented properly on Issue 4S. Is this likely ...New user with a dead 48k issue 2Hello all I've found my way here from watching some excellent youtube videos by Joulesper Coulomb in an attempt to fix a issue 2 rubber key 48k I bo…
... an attempt to fix a issue 2 rubber key 48k I ... [/URL]
If you power it on and off sometimes ...Seriously weird Issue 2 issue... (RAM-related)Hi guys; I have been trying to fix up my Issue 2 and have run across a bizarre issue that I haven't seen elsewhere in the forums. Hopefully one of …
... to fix up my Issue 2 and have run ... across a bizarre issue that I haven't ... narrative:
Spectrum: Issue 2, 48k
Initial problem ... VR1,2 fixed the colour issue.
2. MEMCHK returned ... happens:
On power on, the Spectrum has black ...Great to be back....and with fun to comeHi all, 1982: I bought a new 16k issue 2 in 1982, eventually got microdrives and a dktronics keyboard (version 1). Built a home made eprom programme…
... /> I bought a new 16k issue 2 in 1982, eventually got ... an Arduino controlled digital bench power supply, and on it I ... I'm taking the schematic for the Issue 3 and reproducing it ...Issue 3 expansion connector problemI am having problems with an issue 3 Spectrum, that otherwise works fine, but does not recognize either the Interface 1 or DivMMC/Enjoy (which are bo…
... am having problems with an issue 3 Spectrum, that otherwise works ... />
This is not a power supply problem either, the +5 ...Video fault on issue two ZX boardI've trawled the Internet and drawn a few blanks as to where to look to resolve the fault with my issue two board. I'm hoping a few of you knowledgea…
... resolve the fault with my issue two board. I'm hoping ... working Spectrum 48k with a 3B board I've checked the ...Issue 3 ULA ProblemsI've been given an Issue 3 48k to fix. It was producing no video and no picture on the TV. The coil was buzzing so it was getting power and all the v…
I've been given an Issue 3 48k to fix. ... buzzing so it was getting power and all the voltages tested ... a spare ULA from an Issue 4(6C001E-7) which ... working keyboard and the same issue with none functioning keys was ... out of a known working Issue 4 and this time ...I broke my 48k Speccy!!!!Hey guys, I am looking for some advice, I hope you can point me in the right direction. So, I went about replacing all the capacitors on my issue 4…
... all the capacitors on my issue 4b board. This is something ... several time before without any issue on other 48k's.
power supply.
The display ... /> Why does the 4b 48k schematic only show micro farad specs ...Zx Spectrum 3b schematicHi,<br><br>I'm trying to get the above schematic from the 'Documentation' but it keeps asking for a login/password. It does not accept my login…
... trying to get the above schematic from the 'Documentation' but it ...ZX81 Composite Mod<p>I've done a simple composite mod to my Issue 3 ZX81 following a basic schematic I found on one of the ZX81 forums. Mod consists of a BC547, 1…
... mod to my Issue 3 ZX81 following a basic schematic I found ... . I've disconnected the modulator power and signal input and attached ...
