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48 Issue 3b working but very hot ula and cpuSalve to everybody I bought from e*ay an Issue 3b 48k , fitted in a + case. Fixed the keyboard problem with a new keyboard membrane from good Rwap (w…
... bought from e*ay an Issue 3b 48k , fitted in a + case ... made the video comp output mod. All seems work good and ... -
Issue 3B only sees 16k (and RAMTOP NO GOOD on loading)A ZX+ with issue 3B board that i got recently, does not see anything more than 32768 (sometimes 37267..) on "PRINT PEEK 23732 + PEEK 23733 * 256 (Ent…
A ZX+ with issue 3B board that i got recently, ... note, i did the composite mod on this spectrum, and the ... -
'Interesting' Issue 2 modSo I've been lurking on this forum for a while and I've got to the point where I want to see if I can repair a speccy.. so I bought me a 'broken' one…
... the ULA chip in an Issue 3b or Issue 6a board, or would ... this? I'm guessing a mod to use a different PSU ... -
Issue 3B problemHi! I have an issue 3B board that is having a strange problem: when I got it it didn't had the -5V and +12v, as usual. After replacing TR4 and TR5 t…
... !
I have an issue 3B board that is having a ... -
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 ... />
The second is an issue 3b. I am willing to fiddle ... colour could be a tuning issue but its tuned in fine ... if this is a power issue? Its like it is deliberately ... -
Issue 3B(S)?Got an Issue 3B rubber in today, all boxed up but a sticker on it that states it was made in Korea, hmm, 4S then I think, till I opened it up. Same …
Got an Issue 3B rubber in today, all boxed up but a sticker on it that states it was made in Korea, hmm, 4S then I think, till I opened it up. Same colour board as a 4S but its a 3B, first one like this ive ever come across -
48k + Issue 3B Power SocketHi All, Trying to get a Issue 3b resurrected that had a faulty power socket. The socket has come away from the board and peeled away some of the tra…
... />
Trying to get a Issue 3b resurrected that had a faulty ... -
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 seem ... same setup working with my Issue 2, where the stripes appear ... -
Issue 3B no soundI just noticed that there's no sound in the Issue 3B Speccy that I've been fixing. Is it more likely that the speaker is bust or is it TR7 and D9? …
I just noticed that there's no sound in the Issue 3B Speccy that I've been fixing.
Is it more likely that the speaker is bust or is it TR7 and D9? Or both? -
Issue 3B woesHello there, I currently have a Issue 3B for repairs around, it used to have broken upper and lower RAM, which I replaced with 41256-120 DRAMs (hac…
... ,
I currently have a Issue 3B for repairs around,
it ... />
On power down the issue remains until I let the ... previously verified in another computer, issue persists when swapping ULA & ... -
Dead issue 3b with black and white barsHi all, I've been donated an issue 3b which has some nice black and white bars with a few flashing blocks. I've done a few RAM tests and could spo…
... /> I've been donated an issue 3b which has some nice black ... -
Issue 3B turning offI'm trying to save a Spectrum Issue 3B. I restored the power supply section, changing the 7805, TR4, and TR5, besides all electrolytic capacitors. No…
... trying to save a Spectrum Issue 3B. I restored the power supply ... -
16pf Capcitors for C72/C73 issue 3b. Can I use 18pf?Looking at the service manual it states to use a 16pf ceramic disc capacitor in positions C72 and C73 on issue 3b boards. Is this very critical in bo…
... positions C72 and C73 on issue 3b boards. Is this very critical ... -
Issue 3B suddenly goes black and whiteAnother 3B I have here had a faulty ULA, swapped that out for another and hurrah! Works! New keyboard membrane and composite mod later I load a game…
Another 3B I have here had a ... ! New keyboard membrane and composite mod later I load a game ... checked and re-checked the mod, tested the power supply, power ... -
Post Composite mod video not bright enough - FIXHiall, I have a few Spectrums and decided to modify them all with the composite video mod, i.e. redirect the feed to the modulator direct to the out…
... all with the composite video mod, i.e. redirect the feed ... couple of boards (an issue 3b and an issue 4s) are a little ... increased brightness.
My Issue 3b needed a 6k8, whilst the ... Issue 4s needed a 5k6.
< ... -
Screen artifacts/shimmer after composite modHi folks,<br><br>I've done a little work to what I hope is going to be my work-horse rubber key speccy - It's a Samsung made issue 3b.<br><br>I notic…
... made issue 3b.
I noticed after doing the composite mod that ... little difference. Prior to the mod, I installed one of those ... -
problem with sinclair zx 48 issue 6aHi all, I have the following problem when I turn on my sinclair without rom inserted. [url]http://217.79.64.145/sinclair/5.jpg[/url] when I turn o…
... on my other working sinclair issue 3b without rom i get this ... .jpg[/url] - not working sinclair issue 6a
[url]http://217 ... /11.jpg[/url] - working sinclair issue 3b -
Low speaker volume on a repaired issue two speccyI repaired an issue two speccy which was totally wrecked and missing many parts. I installed the missing parts (resistors, transistors) and replaced …
I repaired an issue two speccy which was totally ... according to the modification for issue two pcb (for better cirquit ... that i removed from an issue 3b board that i have for ... such)?
On another working issue two that i have, the ... -
sinclair zx spectrum issue 6a (again) - how to repairHi All, Is there someone who may explain what these jumpers can be used for. [url]http://forest.no-ip.org/repair/jumpers.gif[/url] <- this is from …
Hi All,
Is there someone who may explain what these jumpers can be used for.
[url]http://forest.no-ip.org/repair/jumpers.gif[/url] -
issue 6a faultyHi All I got issue 6a pcb from ebay with status faulty pcb had bad voltages when I power up I changed tr4 ztx650 and all voltages got back on ic6 I h…
Hi All
I got issue 6a pcb from ebay with ... chips I got from working issue 3b board
any suggestions ... -
PowerSlave's Sinclair/Timex collectionNow that I cataloged all the items I have, it's time to show them :) Between bought and offered, my collection items are: - Sinclair Spectrum 128k…
... know if it's the mod or not, but as ...
- Sinclair Spectrum 48K (Issue 3B) P 068161
Working 50 ... />
- Sinclair Spectrum 48K (Issue 3B) P 073165
Not working ... inside there is a strange mod near the speaker.
[ ... -
48K keyboard issue48K issue 3b reads keys without... keyboard. Looking at recorded keys, problems seems to be with one data line - D1. It happens after a while since p…
48K issue 3b reads keys without... keyboard.
... -
ULA 1E7 in 3B board?Hi all. Any comments on the following would be appreciated. I have an issue 4a and an issue 3b Spectrum. While having a look around inside the 3b …
... I have an issue 4a and an issue 3b Spectrum. While having ... a look around inside the 3b ... 7 ULA, whereas the 3b should have E6. So ... the 3b manufacturing before making their appearance in issue 4 ... models, and so my 3b may be worth a ... -
48K Issue 3B ROM to EPROM methodsHi folks, While fixing up a completely dead Commodore PET I needed a way of testing the 4116 RAM chips that make up its 32K, some googling found a…
... to have such a board (3B that the previous owner had ... -
ZX Spectrum Issue 2 - 12V badHey there, I'm currently attempting to fix a ZX Spectrum issue 2 that I recieved. Overall the machine was generally working when I recieved it, bu…
... to fix a ZX Spectrum issue 2 that I recieved.
Issue 3B IIRC), using a 1A PSU ... -
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…
... version. It has a 'spider mod' transistor soldered directly on the ... Issue 2 Spectrum but I am testing it now with an Issue 3B ... -
zx spectrum 48k interference during first two minutes of warm upi have a issue 3B 48k that i am looking at during the first two minutes (approx.) of warm up there is interference on the screen (tried to take a pic…
i have a issue 3B 48k that i am looking ... is currently running a composite mod (via 100 uf capacitor) as ... -
Low speaker volume on a repaired issue two speccyI repaired an issue two speccy which was totally wrecked and missing many parts. I installed the missing parts (resistors, transistors) and replaced …
... according to the modification for issue two pcb (for better cirquit ... that i removed from an issue 3b board that i have for ... the circuit diagram of an issue 3+. My normal disclaimer applies ... well enough to make the mod, you shouldn't meddle. Which ... -
sinclair zx spectrum issue 6a (again) - how to repairHi All, Is there someone who may explain what these jumpers can be used for. [url]http://forest.no-ip.org/repair/jumpers.gif[/url] <- this is from …
... speccy I used this mod and everything is fine.< ... br /> p.s. other mod with wires working too :)
mod :) i used on my working speci issue 3b. I ... there is no track on issue 3b , the one which is in ... issue 6a , the red inscription ...
