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issue 4s for reapirHi All, This time I have issue 4s for repair :) Here is few screen shots and small movie after boot. [url]http://forest.no-ip.org/issue4s/[/url] I kn…
... ,
This time I have issue 4s for repair :)
Here is ... /[/url]
I know only ula working fine and have good ... .
And what is this issue 4s ? what schematics to look ?
ZX Spectrum Issue 4S composite video fuzzy (horizontal blur)Dear people of WoS, Thank you very much for taking the time to read. I have an Issue 4S I recently acquired and planned to fix up as a gift for a…
... to read. I have an Issue 4S I recently acquired and planned ... a friend.
The issue:
Composite video out on ... .67v (4)
Reseated the ULA (6C001E-7 I don’t ...Spectrum issue 4S ??? What is that?I recieved a spectrum 48k today that i bought from Ebay (rubber). I opened it up and to my surprise it was an Issue 4S, yes 4S!!! I didn't know there…
... my surprise it was an Issue 4S, yes 4S!!!
I didn't ... anyone know how can an issue 4S exist?Spectrum Issue 4SI bought a speccy 48k off of eBay. Looking inside it has an Issue 4S board. But I cannot find evidence that the 4S was ever issued inside the rubber …
... . Looking inside it has an Issue 4S board. But I cannot find ... evidence that the 4S was ever issued inside the ... speccy but mine definitely says 4S.
I have only ... seen the Spectrum+ with the 4S inside. Is this a frankenstien ...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 had been ... be blown as well?
- Issue 4S? In WOS docs there are ... for Issue 4a and 4b, but I've never head about Issue 4S.Issue 4S users... I need your help!Short story: Issue 4S spectrum don't work. TR4 seems to have pins at different places from other speccys (BCE versus EBC), and usual replacement part…
Short story: Issue 4S spectrum don't work. TR4 ...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.ZX 48 issue 4S no s-video possible?No s-video on ZX 48 issue 4S possible? I have had this mod on my issue 4A. But this did not work with my 4S. On C65 is no chrominance signal. Here …
... s-video on ZX 48 issue 4S possible? I have had this ... mod on my issue 4A. But this did not ... work with my 4S. On C65 is no chrominance ...For sale: ZX Spectrum 48K Issue 4SI have a fully restored (and with all chips socketed) ZX 48K Issue 4S, that I am told is a bit of a rarity, that I am willing to sell. Dont know what…
... all chips socketed) ZX 48K Issue 4S, that I am told is ...Issue 4S display improvementsHi all, I'd noticed that the display (via modded composite out) of the Issue 4S I repaired a while back (details [URL="http://www.worldofspectrum.or…
... modded composite out) of the Issue 4S I repaired a while back ... /> So if you have a 4S, this looks like a worthwhile ...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…
I decided to buy an Issue 4S PCB after reading much about ... about the Issue 4S. Is it closest to Issue 4A or Issue 4B? As ... problem is with using the Issue 4S with Divide. So far it ... isn't implemented properly on Issue 4S. Is this likely to be ...Issue 4s - Not 'Jailbars' but lines alloverIt's not another 'Jailbars' question!, but I've got this Issue 4S that aside from the 'Jailbars' on the Paper area of the screen which I can live wit…
... !, but I've got this Issue 4S that aside from the 'Jailbars ... is something specific to the 4S or if anyone else has ...Spectrum issue 4SI have an almost completely depopulated issue 4s board. Wondering what to do, repairs or spares? I hooked it up and the voltages are off, 5v is fi…
... have an almost completely depopulated issue 4s board. Wondering what to do ...Spectrum Serial Numbers Wanted!![b]This post updated Sept. 26, 2013[/b] As far as I know, the serial numbering system for the Spectrum has never been fully worked out. For the p…
... a second tape??)
48k Issue 4S
ULA: 6C001E-7
CPU ... -352855 (in red) Suspected memory issue, ULA working, orig PSU.
48k ... Issue 4A
ULA: 6C001E-7 8502
Can anyone test my Issue 2 ULA?Hi guys, Could anyone with a Issue 2 Speccy try whether my ULA works in theirs? I will obviously cover postage etc. Just want to know whether I have…
Hi guys,
Could anyone with a Issue 2 Speccy try whether my ULA works in theirs? I will obviously cover postage etc. Just want to know whether I have a faulty ULA or not before trying to source one from somewhere.Intermittent reset on 48K (issue 4S)I'be been fighting an intermittent selfreset the whole day. Changed ULA - did not help. Tested TR6 as i could and compared the reading with another…
... whole day.
Changed ULA - did not help.
ULA temp is about 48-50C ... that it had a loading issue (always gave me R tape ...Issue 4S Schematics and DC-DC circuitA while ago I bought a Spectrum 4S that had problems tuning. I removed the RF tuner as I was not going to use it and did the composite mod. It worked…
... ago I bought a Spectrum 4S that had problems tuning. I ... , I notice that the standard issue 4 schematics and layout documents ... not 100% correct for the 4S, which makes it a bit ... have specific schematics for the 4S?
I currently have ...Spectrum+ keyboard issueHi I have a spectrum+ (issue 4s board) where the 1-5 keys do not work. I have replaced the membrane and checked for continuity. I have also tested …
... />
I have a spectrum+ (issue 4s board) where the 1-5 ... /> I have also swapped the ULA for a known woking one ...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. ... it with a spare ULA from an Issue 4(6C001E-7) ... working keyboard and the same issue with none functioning keys ... the ULA again for one out of a known working Issue ... the wrong tree with the ULA because when dropping the ...Heatsink for ULAHi, My Speccy 48k issue 4s starts to get temperamental when it's been on for a while. Machine itself is fine but loading gradually becomes more unre…
... ,
My Speccy 48k issue 4s starts to get temperamental when ... chum on Twitter suggested the ULA might be getting hot.
ULA might cure it? Question is ... put a heatsink on their ULA?
Cheers ...No CLK on issue 2 ULA pin 32I'm trying to fix an issue 2. The symptoms are as follows:- Black and white bars on screen, colours near impossible to tune in, although these po…
... 'm trying to fix an issue 2.
The symptoms ... of CLK on the ULA, but the ULA's I'm using ... .
Working back from the ULA I tested and changes the ...It's fitting...... that in the very month that the 25th anniversary of the Speccy falls on, I'm just finishing up making my first ever Spectrum peripheral. It's a …
... might be suspect) or the ULA (which might also be suspect ... a continuity/short test (the Issue 4S board it's connected to ...TIPP31 transistor questionYesterday I had the time to try and repair a 4S issue 48k spectrum I had. First of all I replaced all the electrolytic capacitors. The tr4 transistor…
... to try and repair a 4S issue 48k spectrum I had.
issue (4S) was fitted without any rearrangement ... boot. I had tryied the ULA on another machine and it ...Earliest ULA datecode ??I'm on a mission to find the earliest ULA datecode. Ie, when the first batch of ULA's were manufactured. The earliest picture of the Spectrum circu…
... mission to find the earliest ULA datecode. Ie, when the first ... batch of ULA's were manufactured.
ULA - and Sinclair may have in ... .....
The earliest issue 1 ULA datecode I have is 8217 ...Stealth AllRAM SpectrumHaving just received a couple of new keyboard membranes to fix a couple of machines with, the thought crossed me that I should do a special project w…
... />
But I have an issue 4S board with no case to ... is generated by the ULA, Chris Smith's ULA book shows it ...48k + Spectrum Issue 4S Display IssueHi all! Brand new user here. Growing up I had a zx spectrum for a little bit, and recently I have bought a working 48k + Spectrum (Issue 4). I was…
... bought a working 48k + Spectrum (Issue 4). I wasnt sure if ...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…
Never 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][/url]
But it is!ZX Spectrum+ DivMMC EnJOY! Grundig 16" LCD TV and books.The Spectrum is in very good condition. Composite video mod. New mambrane (bought in November 2014 from rwap_software [url]http://www.sellmyretro.co…
... report---
"48K ZX Spectrum+. Issue 4S.
Serial: "Upgraded".
ULA pin 28 on executing command ...ULAAre ULA's (for Spectrum 48k's) interchangeable through the different issues? To give some background, to work out what was wrong with an old speccy I…
Are ULA's (for Spectrum 48k's) ... have, I tried an issue 3 ula in an issue 2 board. It ... testing was done. The issue 3 ULA was then placed back in ...
