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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…
... inside it states 'Z70833 1988 Issue 1 Amstrad', the mother board ... answer: you have a +2B PCB in a +2 case. Amstrad ... -
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 remaking of an Issue 2 needs to be transferred ... /discussion/54464/zx-spectrum-test-pcb#latest"]https://worldofspectrum.org/forums ... /discussion/54464/zx-spectrum-test-pcb#latest[/url] -
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 …
... PCB will be useful
5) The question of which Issue ... -
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 …
... />
1) A partially depopulated Issue 2 board . This needs caps ... sockets.
2) An Issue 4B board that should have ... .
I suppose the Issue 2 board is less of ... bits coming down into the PCB on the side like ships ... -
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 …
... ;906774"]I suppose the Issue 2 board is less of ... into the socket on the PCB.
Why you ... bits coming down into the PCB on the side like ... case, that go to the PCB? They are part of ... of strip board with a PCB mounting phono socket.
... -
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 …
... some of these on this PCB are in complete blocks of ... of the difficulties with the Issue 2 are all the wiring ... -
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 …
My mini PCB fitted to the issue 6 board:
[img]http://fotogalleria.info/pub/ZXSpeccy/ROM_SW/ZXROM_SW_21.jpg[/img]
Anyway, all the best with your testing board and good luck. -
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 …
... . This technique involved using a PCB stand as a kind of ... on both side of a PCB at the same time , solder ... on 2 sides using a PCB stand . Some of these stands ... late for a nice 48k Issue 2 I messed up though ... -
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 …
... there att are on an Issue 2 PCB:-
[url="https ... -
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 …
... on the actual Test Rig Issue 2 PCB . So I can remove ... -
ZX Nuvo 128..Hi There, I have built the ZX Nuvo 128 by Superfo, but it has a problem. The machine is working, but the video signal is completely bonkers. I've …
... old ones desoldered from unknown PCB found on the bottom of ... Nuvo I found a strange issue with Kempston interface yesterday ... it ... iphone that was always an issue on my real 48k machine ... -
ZX Nuvo 128..Hi There, I have built the ZX Nuvo 128 by Superfo, but it has a problem. The machine is working, but the video signal is completely bonkers. I've …
... introduced to sort out this issue using just three 1n4148 diodes ... far we already found ...this issue is constantly copied on the ... to make the next Issue of ZX Nuvo PCB faultless :) (I am ... -
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 …
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 …
... , However it is an Issue 2 PCB.It has a piece of ... this make a better TEST PCB than my current one?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 …
... to be a largely socketed Issue 2 . By moving the ... to be a Test PCB or does this provide ... an ideal Test PCB almost ready made ? Further ... found a possible candidate PCB to revive my flagging ... test PCB project . Further work ...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 …
... ][*]Be an issue 2 or later PCB, but not an issue 6A (we ... EPROM.
[*]Be a later issue PCB so has the last Sinclair ... supplies), or if an earlier issue PCB, modify the circuit to bring ...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 …
... ][*]Be an issue 2 or later PCB, but not an issue 6A (we ... EPROM.
[*]Be a later issue PCB so has the last Sinclair ... supplies), or if an earlier issue PCB, modify the circuit to bring ...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 "extra wiring" on an Issue 2 Z80 chip.
PCB connector . I have added a ... making me think that the PCB can be set up outside ... set up is different on Issue 2s so this hole may ...Opus Discovery "the big switch on" (after 20 years)I have a few of these Opus Discovery's with different Eproms in that have not been swiched for 15-20 years or so . I am in no rush to switch any on …
... my work)
4) The PCB looks like the one on ... need to confirm the Issue Type of the PCB
8) The ...
This type of PCB needs a lot less work ...Trying to repair a Speccy 48k - No PulsingI've had this machine for ages. I'd I've been putting off fixing it for some time now. So a couple of days ago I pulled it apart and started prob…
... "]here [/url]of a Samsung issue 3B PCB. Does your board look ...Trying to repair a Speccy 48k - No PulsingI've had this machine for ages. I'd I've been putting off fixing it for some time now. So a couple of days ago I pulled it apart and started prob…
... "]here [/url]of a Samsung issue 3B PCB. Does your board look ...Opus Discovery "the big switch on" (after 20 years)I have a few of these Opus Discovery's with different Eproms in that have not been swiched for 15-20 years or so . I am in no rush to switch any on …
The Issue E PCB on Opus Discovery "Big Brother"< ... the "Big Brother" PCB . It shows the Issue E designation .I will ... a similar place on the PCB. As Issue E wriing is under ...Opus Discovery "the big switch on" (after 20 years)I have a few of these Opus Discovery's with different Eproms in that have not been swiched for 15-20 years or so . I am in no rush to switch any on …
A quick revisit to the Issue E PCB (Opus "Big Brother")
Issue E Board and take some ... the metal case (unlike the Issue D PCBs which , as modded ...Opus Discovery "the big switch on" (after 20 years)I have a few of these Opus Discovery's with different Eproms in that have not been swiched for 15-20 years or so . I am in no rush to switch any on …
... one Bridge Rectifier on Issue E PCB (as modded on Opus ... routes so different between Issue D and Issue E PCBs?
... needed repair on the Issue D PCBs was difficult ... and get the Opus Issue D PCBs working again ... time the much easier Issue E is being looked ...Opus Discovery "the big switch on" (after 20 years)I have a few of these Opus Discovery's with different Eproms in that have not been swiched for 15-20 years or so . I am in no rush to switch any on …
... taken
The Issue D modifications I did needed ... at the size of the Issue E PCB power supplies
Opus No 4 "Big Brothers Brother" Issue ... E PCB
Depth ( ...Opus Discovery "the big switch on" (after 20 years)I have a few of these Opus Discovery's with different Eproms in that have not been swiched for 15-20 years or so . I am in no rush to switch any on …
... the pics from the other Issue E PCB Opus Discovery "Big Brother ... have been damaged (whereas an Issue D was). So are these ... lucky units , or was the Issue E board inherently more capable ...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 …
... 5th July)
This Issue 2 had oxidization issues as ... screen problem was cleared . The PCB keyboard sockets were a mess ... keyboard only partially works . Both PCB connectors have been replaced and ...Opus Discovery "the big switch on" (after 20 years)I have a few of these Opus Discovery's with different Eproms in that have not been swiched for 15-20 years or so . I am in no rush to switch any on …
Opus Discovery Issue E PCB (Big Brother's Brother)
< ...Opus Discovery "the big switch on" (after 20 years)I have a few of these Opus Discovery's with different Eproms in that have not been swiched for 15-20 years or so . I am in no rush to switch any on …
Issue E PCB cont.
Today I ... in half and used a PCB clamp . But never mind , it ... ceramic block so that the PCB can be taken off easily ... />
Unusual features of this PCB:-
1) The variant edge ... on the bottom of the PCB.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 …
... 48k case , and now a PCB "re-entry" back to Test ... Rig PCB status for this "now not so good" Issue 2 ...
