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ZX Spectrum 48K,issue two - can't get it repairedI have an issue 2, which has some weird very small PCB hanging over the Z80. Some wire go to various places on the big PCB, two go to connections 36 …
I have an issue 2, which has some weird very ... /> Test 1 = ok
Test 2 = ok
Test 3: LEDS ... 2, 4, 6 and 8 start ... LEDs flashing (4 times LEDs 2, 4, 6, 8, then 4 ... -
ZX Spectrum 48k issue 3b power problem?Hi :) I was lucky enough to find a couple of ZX Spectrums at a car boot sale yesterday. I spent the evening fiddling about with one (issue 2) and t…
... evening fiddling about with one (issue 2) and thats now upstairs entertaining ... />
The second is an issue 3b. I am willing to ... colour could be a tuning issue but its tuned in fine ... if this is a power issue? Its like it is deliberately ... -
Requesting a little help to identify the purpose of this 'add-on' to my Issue 2Hi everyone First of all it's my first post here so please go easy on me! I'm grateful to be accepted into your fine little club :smile: I probabl…
... chip is a SN74LS00N Quad 2-input NAND and here's ... .
Pins 1 and 2 (both inputs to first NAND ... -
First issue is outI have brought the first issue forward for people to see how the format is going to be if they want to write for the magazine. have a look and let m…
I have brought the first issue forward for people to see ... me know what you think Issue 2 is in the works as ... -
spectrum fever issue 2 is outreleased a little bit early due to the mental life i have at the moment. Hope you all enjoy it. Dont know when i will finished issue 3 due to new bab…
released a little bit early due to the mental life i have at the moment. Hope you all enjoy it. Dont know when i will finished issue 3 due to new baby but it will be finished. -
Strange edition of ZX Spectrum 48K?Hi Everyone! A couple of years ago I bought a ZX Spectrum 48K and there is one very particular thing about it: The lettering "ZX Spectrum" that is s…
... replace the keyboard foil and the motherboard says Issue #2. I had an Issue #2 ... -
4116 SRAM replacement (and ULA timings).As mentioned in another thread, I have spent quite a lot of time experimenting with different circuits and components for using a static RAM IC to re…
... a static RAM IC to replace the lower RAM 4116s in ... testing a prototype with an Issue 2 Spectrum and different ULAs. It ... are problems with a 5C112E-2 or 5C112E-3. It also ... in the Spectrums later than Issue 2 that I've tried along ... -
48K Issue 3, noisy display.Has anyone here experienced and been able to resolve a problem that looks like this: [URL="http://drizzle.zigg.net/ZX/ZX106-display.jpg"]Photogra…
... . The same measurement on an issue 2 Spectrum that gives a good ... -
Looking to buy ZX Spectrum 48k issue 3+, Spectrum + or 128KI am looking to buy Spectrum 48ks, issue 3 and onwards if possible, but even issue 2 is ok. I am also looking for a spectrum + and a spectrum 128k. T…
I am looking to buy Spectrum 48ks, issue 3 and onwards if possible, but even issue 2 is ok. I am also looking for a spectrum + and a spectrum 128k. The caveat is that it needs to be shipped to sweden, if you are willing to do this?
/Johan -
Replacing coil with other component?The purpose of the coil transformer, from what I gather in the schematics of the issue 2 spectrum, is to create 5V from about 9-10V. Would it not be …
... in the schematics of the issue 2 spectrum, is to create 5V ... it not be possible to replace the transformer with a suitable ... -
Issue 1 ram connectors....Hi Does anyone have the pinout of the Issue 1 internal RAM connectors, for the 16K-> 48K upgrade board, as I'd like to try and make myself a board, a…
... have the pinout of the Issue 1 internal RAM connectors, for ... fitted into sockets on the issue 2 and later ?
Cheers ... -
Spectrum 128k +2 grey RAMhi all, the manual say that ram ic's should be KM4164B-15P but when i open my spectrum (not repaired by anyone) the ram chips was KM4164B-12 is thi…
... else, i have a 48k issue 2 zx with RAM chips IC ... -
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 powers ... -
CapacitorsSorry, another question... I've done a bit of looking around, although after a couple of beers this may not have been as systematic as usual, but I …
... am dealing with an Issue 2 and and Issue 3 board, if that ... posts have said I should replace them all if possible, and ... -
Replacing Axial Caps with Radial CapsMany of the WOS members have complained of how difficult is it to get hold of Axial Capacitors when they want to replace the electrolytic capacitors …
... Capacitors when they want to replace the electrolytic capacitors on a ... easy it would be to replace the caps with radial caps ... done the demo with an Issue 2 board, but the same principle ... be used with the other Issue boards.
C25 ... -
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 the ... ]
Also the keys 2, w, s, z, symbol shift ... -
Some problems with 2 ZX Specturm board'sHi, last week i got some ZX Spectrum stuff. Also 2 ZX Spectrum 48K's, one in the orginal case the anoter one in a DK'tronixs case. Both have problem'…
... ZX Spectrum stuff.
Also 2 ZX Spectrum 48K's, one ... case:
It is a ISSUE 2 board, with composite mod i ... stuff.
It is a ISSUE 3 board, and modded with ... 48k works great, so those 2 board are broken :sad: -
Spectrum Not Responding to Keyboard InputHello, sorry if this thread is not in the correct place, This is my first post and I'm not sure where to post this type of thread. :lol: Anyway, I r…
... /> Anyway, I recently purchased an Issue 2 Sinclair ZX Spectrum 48K, Upon ... the event I have to replace it where is the best ... -
Tape loading problem with Issue 3BI have an Issue 3B 48k that doesn't seem to want to load any tapes. I have an MP3 player connected to the EAR socket. When I type LOAD "" and start p…
I have an Issue 3B 48k that doesn't ... same setup working with my Issue 2, where the stripes appear to ... -
Spectrum Show Magazine #2The Spectrum Show Magazine issue 2 is now available to download from my blog. Been a bit of a slog, but finally finished :smile: All the issues coul…
The Spectrum Show Magazine issue 2 is now available to download ... -
5v reg replacementHi all, Have been playing with one of my Issue 2 Spectrums and decided to replace the 5v regulator & heatsink with this wee switching reg I had lyin…
... one of my Issue 2 Spectrums and decided to replace the 5v regulator ... -
+3 edge conn issueHi all, Long time 48k user, but recently bought a +3 off Ebay for fun. I made the composite video mod and have her up & running but, Have tried my …
... ), and also tried my Spectranet (issue 2) in it (yes I set ... inside says it's an Issue 1 +3.....but like I ... -
48k - Why Won't it Buzzzz?Hi WOS ;) I bought a load of Spectrum games off eBay and thrown in for good measure was a 48k 1984 Issue 6a circuit board that I was told was for sp…
... measure was a 48k 1984 Issue 6a circuit board that I ... wrong however. Pin1 = 0v, Pin8 = 2 to 3v but Pin9 does ... and donated to my poorly Issue 2 which now works as a ... for what to test or replace. Any suggestions?
Thanks ... -
Spare diodes... what are they for!?Hi all I've got a load of spare diodes here and an issue 2 board I want to bring back to life. I forget which of these diodes replace what... I've …
... spare diodes here and an issue 2 board I want to bring ... forget which of these diodes replace what...
I've ...
What do these replace, please? :D
Thanks -
ZX Spectrum issue 2 has only blue tintsRecently I've bought a 16k speccy and ran into some issues with it. Faulty keyboard, broken caps, no stable frequency, faulty lower RAM chip, it bein…
... have the blue tint issue and loading issue. From the research I ... could be because of another issue (or that I'm just ... luck)
The not loading issue might be because of a ... -
Upper memory issueZX Spectrum 48K, issue 2, boots fine. Lower RAM OK. When tested with the new test ROM in the Diagboard, for all upper RAM tests "FAIL" is shown. I…
ZX Spectrum 48K, issue 2, boots fine.
Lower RAM ... 's (5C112E) with another, working, issue 2 PCB.
Replaced an ... IC has been removed. The 2 wires to the ULA are ... -
Spectrum +2 (grey): Mod- and operation- related advices needed.Dear Sirs and Ladies, Please welcome a newbie to the “World of Spectrum” (both to the forum and, well, metaphorically). I’ve recently purchased a…
... an attic-slumbering ZX Spectrum +2 (grey – the one with ... cable with 15 Ω resistor;
2. U-turned TR4 (composite signal ... no idea how genuine Grey +2 should work, I kindly ask ... ? (May be related to issue 2 below).
2. Datacorder (and, perhaps, ... -
Spectrum 48K / composite mod / LCD TV: voltages out of the ULAHello Spectrum World I have juste bought again my first computer on ebay... a Speccy 48k issue 2 with a 5C112E-2 ULA. Just had to replace TR4 and …
... Speccy 48k issue 2 with a 5C112E-2 ULA. Just had to replace TR4 ... at 3.3V, black at 2.2V and white at 1 ... -
Replacing voltage regulators - need to sanity check a few things pleaseHi Everyone I'm in the process (with a lot of help from some friends at Greenford Computer Club), of giving my three Speccys some much needed prev…
...
Spectrum +2 Grey (Issue 3 board)
Spectrum 48+ (Issue 2 board, was ... a Traco Power TSR 2-2450 to replace its legacy regulator, or ... the entire heatsink assembly and replace it with the same type ... would be needed to replace TR8 on the +2 board? My TR8 ... -
Another Spectrum is brought back to life.Hi Spec-chums. I have been having bit of busy afternoon with repairs today. I've brought back to life a Panasonic Super-VHS recorder, and more intere…
... more interesting an issue 2 16k ZX Spectrum board. The issue 2 board was ... set about checking continuity, finding 2 pins without continuity. It's ... jobs I could do like replace the caps, although I really ...
