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ZX81 Ram pack problemI got recently Sinclair 16k memory expansion for my ZX81, but for some reason it will not work. The computer itself is operating normally without hi…
... that the issue 1 and 2 have a dual PCB, while later ... -
Any one know what this mod isOk +2b with a mod anyone know what it is and why its there and if its worth removing cheers [img]http://i.imgur.com/p5IG6Ec.jpg[/img]
This is indeed a factory modification common on the Z70833 ISSUE 1 motherboard to solve the DRAM timing issue. The ISSUE 2 and ISSUE 4 boards have the circuit change incorporated into the PCB. -
Send in the ClonesPlease name all the Spectrum clones out there ( I would say I need it back on my desk in 5 minutes , but I will be a bit more generous in this case!…
... Sinclair Spectrum 16k/48k issue 1 and issue 2 boards would not ... work in issue 3 and later machines. Again ... PCBs. And because the +2A PCB has all the same sound ... -
Send in the ClonesPlease name all the Spectrum clones out there ( I would say I need it back on my desk in 5 minutes , but I will be a bit more generous in this case!…
... Sinclair Spectrum 16k/48k issue 1 and issue 2 boards would not ... work in issue 3 and later machines. Again ... enough, that's a different issue.
[quote="1024MAK ... PCBs. And because the +2A PCB has all the same sound ... -
Not bored with the Boards.Going through some old tapes stored rather badly I came across an unlikely item that that I must have stored away quickly with other low grade items …
... I use for all the PCB and board related stuff (provided ... PCB only that seemed to be slightly broken . It was an Issue ... 2 and it went to £22 for a PCB only ... -
Disabling the ROM without removing the whole thingHi! I've got my hands on a non-working issue 6a. I suspect the ROM may be bad, but other things may be faulty as well. I've read that in an otherwis…
... lower RAM PCB modules work well in another issue 6a board. What ... -
Spectrum stuff online "buying skills". Are real skills needed for low cost Speccy items? Firstly , there are some pretty fundamental requirements that are probably too basic to mention , like buying the right software at the right pri…
... "challenged" by a nice Issue II Speccy PCB which was starting at ... to £22 (just for a PCB!)
Well that is ... minor fault . This included the PCB , membrane , the case , the rubber ... -
Not bored with the Boards.Going through some old tapes stored rather badly I came across an unlikely item that that I must have stored away quickly with other low grade items …
... the component side of the PCB with soldering iron on the ... old capacitors out of this Issue 3b board . The keyboard connectors ... memory chips . I decided this PCB is a useful reference for ... -
Another 48k Speccy acting as a 16K model.Hi all, I originally was going to post asking for help to fix the new addition to my family a very nice condition Issue 2 sold on ebay as a 16K model…
... is not supported by the Issue 2 PCB without mods, which is ... chip will work in an Issue 2 without mods, but if ... -
Another 48k Speccy acting as a 16K model.Hi all, I originally was going to post asking for help to fix the new addition to my family a very nice condition Issue 2 sold on ebay as a 16K model…
... is not supported by the Issue 2 PCB without mods, which is ... chip will work in an Issue 2 without mods, but if ... -
Not bored with the Boards.Going through some old tapes stored rather badly I came across an unlikely item that that I must have stored away quickly with other low grade items …
... apart Ok . It was an Issue 6A from 1984 .I have ... and I am surprised that Issue 6A can be a rubber ... keyed version . Nothing on the PCB was socketed except the ULA ... -
Not bored with the Boards.Going through some old tapes stored rather badly I came across an unlikely item that that I must have stored away quickly with other low grade items …
... between the heatsink and the PCB for two reasons:
Prevent ... on, but then, they were issue 1 and 2 boards...
Not bored with the Boards.Going through some old tapes stored rather badly I came across an unlikely item that that I must have stored away quickly with other low grade items …
... or external (to the PCB)heatsink: for instance I ... not directly mounted on the PCB itself . So these new ... spot needed on the PCB of the switching regulator ... or to fit on the PCB
2) ... !
The main issue for a new buyer is ...Spectrum +2 datacorderHi, my Spectrum +2 datacorder isn't working. Does anyone know if I can still load software through the tape/sound socket at the back of the machine i…
... LOAD and SAVE connectors to PCB of internal tape recorder in ... the bottom half containg the Issue 1 board it works like ... the internal tape recorder or pcb - the external jacks links directly ... /> Could 128k +2 grey Issue 1 and Issue 3 boards contain different ...Not bored with the Boards.Going through some old tapes stored rather badly I came across an unlikely item that that I must have stored away quickly with other low grade items …
Not bored with the Boards.Going through some old tapes stored rather badly I came across an unlikely item that that I must have stored away quickly with other low grade items …
Issue 4B with uplifted capacitors (using ... my capacitor "map" of the PCB
The idea is ... scale) "MAP"/drawing of the PCB is accurate so I can ...Not bored with the Boards.Going through some old tapes stored rather badly I came across an unlikely item that that I must have stored away quickly with other low grade items …
... "Holy" errors on the Issue 4B Spectrum PCB.(caused by having too ...ZX Spectrum Test PCB I recently read about one of these (I think it may have been the Retroleum site but I am not sure) and I thought "What a great idea" . As pictured …
... I would go for any Issue 6A PCB, add socket for RAM ...Not bored with the Boards.Going through some old tapes stored rather badly I came across an unlikely item that that I must have stored away quickly with other low grade items …
... list" is a Gold Plated Issue 3.
A new ... to do the job.This Issue 3 PCB has quite a few ...Not bored with the Boards.Going through some old tapes stored rather badly I came across an unlikely item that that I must have stored away quickly with other low grade items …
Issue 3 Recapped OK
... ( as a lot on this Issue 3 one were not visible ... capacitor details for the whole PCB : the Cap Map" is a ... on the underside of the PCB : it lifted up I think ...ZX Spectrum Test PCB I recently read about one of these (I think it may have been the Retroleum site but I am not sure) and I thought "What a great idea" . As pictured …
... the Function of a Test PCB be . (Speccy stuff or more ... the role of this TEST PCB to be . Is it merely ... a rational re. which Issue of Spectrum PCB to use . Is there ...Not bored with the Boards.Going through some old tapes stored rather badly I came across an unlikely item that that I must have stored away quickly with other low grade items …
... sucking performance! Yesterday on the Issue 3 board,I think the ... it did not clear the PCB holes quickly enough and I ... ready to recap the next PCB.Not bored with the Boards.Going through some old tapes stored rather badly I came across an unlikely item that that I must have stored away quickly with other low grade items …
The Issue 3 Capacitor Pics
... of the bolt underneath the PCB which can stop the plastic ...Dk'tronics and other similar "add on" Speccy keyboards . What can be done with them and when?. The underlying assumption I am making here is that people who have them will want to "hang on" to them and may also want to get them working . But …
... is non standard 3) The issue of which keyboard to use ... kit had a very small PCB that was meant for a ...Not bored with the Boards.Going through some old tapes stored rather badly I came across an unlikely item that that I must have stored away quickly with other low grade items …
Issue 4A done (A success): now ... on the underside of the PCB is very fine and I ...Not bored with the Boards.Going through some old tapes stored rather badly I came across an unlikely item that that I must have stored away quickly with other low grade items …
Issue 3B Mystery
This ... as I had done an Issue 3 before (now recased) So ... the top side of the PCB appeared to have disappeared under ... it up as on the Issue 4 these pads are tracked ...Spectrum 128k 2a or not 2b....Just picked up a +2 black case version and I'm in as little bit of a quagmire, The case is definitely black, has '+2A' stamped on the bottom, but in…
... Z70833 ISSUE 1 board, this was incorporated into the PCB on the ISSUE ... 2 and ISSUE 4.
Not bored with the Boards.Going through some old tapes stored rather badly I came across an unlikely item that that I must have stored away quickly with other low grade items …
... at top right of Spectrum Issue 2 PCB.
This has ...Spectrum 128k 2a or not 2b....Just picked up a +2 black case version and I'm in as little bit of a quagmire, The case is definitely black, has '+2A' stamped on the bottom, but in…
... Z70833 ISSUE 1 board, this was incorporated into the PCB on the ISSUE ... 2 and ISSUE 4.
Not bored with the Boards.Going through some old tapes stored rather badly I came across an unlikely item that that I must have stored away quickly with other low grade items …
... of the Speccy PCB . I have compared this Issue 2 with ... another bare Issue " board I ... was a pity about that Issue 2 it looked to ... the top side of the PCB is very fragile . This ... problem I had with the Issue 3 and a capacitor ...
