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What is the rarest sinclair item u have ?For me, its a Sinclair PC200 boxed working and complete, has anyone any idea what its worth ? I am going to be selling it along with the rest of my …
... either of :
- An issue 3 of original Sinclair ZX ... is on a single board with an actual ULA on it. Never ... -
48k one dead, one dodgyhello everyone. I have 2 48k spectrum +'s (the one with the QL case). Both boards have issue 3B on them near the speaker. The first will power up …
... ).
Both boards have issue 3B on them near the ... connector has snapped off the board. This one will not even ... ) or the pair near the ULA (BC184). Equivalents of these transistors ... -
48k one dead, one dodgyhello everyone. I have 2 48k spectrum +'s (the one with the QL case). Both boards have issue 3B on them near the speaker. The first will power up …
well the socket board is the totally dead one ... . Its LM1889N
The ULA is on a socket
board.
The one that works (apart from the screen issue ... )
Only has the ULA on a ... -
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…
... and +12, IIRC). Anyway, my issue 6A clone has more modern ... you have another working issue 6A board, try a ULA swap next.
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…
... br />
I insert ula from not working to working ... -6 ? 6 coming from issue 3b
if i ... good one in the bad board, not vice-versa, in ... chip sitting between the real ULA and the CPU (IC27). ... between the CPU and the ULA, intercepting address lines and ...Blowtorch method of Speccy repairsI just did my first Spectrum repair (and successful at that). It was the Issue 2 spectrum I wrote about a while ago, I just hadn't got around to doin…
... that you have fixed the board entirely, you should load the ... performs tests on keyboard, sound, ULA, RAM chips, and ROM mostly ... />
btw, i repaired an issue two myself lately. Had multiple ...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 removed from an issue 3b board that i have for ... speakers used on later board issues were slightly more ... signal that the ULA alone provides. Issue 3+ has a ... ZTX450 to amplify the ULA output ... gets a signal from the ULA).
Mr ...Issue two picture qualityDoes anyone know if issue two and earlier spectrums have worse picture quality (in general, beside colours) compared to issue 3 and later? I mean on…
... Does anyone know if issue two and earlier spectrums ... beside colours) compared to issue 3 and later?
... /> I mean on both issue two speccys that i have ... normal for this early issue. Also i want to ... the ULA, try a ULA chip from a higher issue board - the ULA' ...Did I killed my Speccy ???Hi guys, 1 minute ago I was working on my 128 +2A... But I made a mistake : I cut the gound on the PSU plug of the computer, and I forgot to resolde…
... you've taken out the ULA chip too, in which case ... a replacement part for that ULA and you certainly won't ... to the PCB, and the Issue 2 board survived unmarked.
ULA off there's the problem ...Audio input on a +2would it be possible to connect an external tape recorder to the socket at the back,or would something bad happen?
... to the tape deck circuit board itself.
But in ... circuit") as to why the ULA in the Spectrum got destroyed ... you have a ground loop issue caused by your tape deck ... ) onto a pin on the ULA that was NOT supposed to ...Whats up wi mi speccy ? M RAMTOP no good 0:3I bought a speccy on ebay tried to load Mission Impossible but about 30 secs into loading it stopped and i got the error message ... M RAMTOP no good…
... get 32600 but its an issue 4a !!!!! guess i'll have ... /> No such thing as an issue 4a 16K machine - unless it ... chip is completely shagged, bad ULA - the list goes on, but ... you want to swop the board for a working one?Dead +2B, help required...It was bought defective on ebay. It came with two faults: a "dead" power supply (it was the fuse) and a faulty main unit. The power supply is now re…
... than the others, and the ULA get noticeably hotter (although I ... +2B, made in taiwan, board Z70833 issue 1. I'm trying to ... possible failure before getting the "ULA dead" death sentence.Dead +2B, help required...It was bought defective on ebay. It came with two faults: a "dead" power supply (it was the fuse) and a faulty main unit. The power supply is now re…
... +2B, made in taiwan, board Z70833 issue 1. I'm trying to ... possible failure before getting the "ULA dead" death sentence.[/QUOTE]
ISSUE 1 AMSTRAD is all over ...On a 48K issue 6A......how can i isolate the 32K block? I want to test if there is any fault on the 4116's , leaving the 4532's out of the equation. Will removing the …
... entire bus back to the ULA and CPU and supporting logic ... doing the same on an issue 4 board lying around waiting to ...GrrrThere's nothing more annoying than finding out that you've managed to bridge /RAS and A3 on the bank of 4116s while putting in sockets. Naturally, th…
... desoldering fan. I put the board in something to hold it ... ULA - that's been consistently in a socket at least to Issue ...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…
... all electrolytic capacitors on the board. This is the first thing ... I try to repair a board. Unfortunately I do not have ... (disc caps are used on issue 4S boards), is cracked, a ... screwdriver trying to remove the ULA chip. Could it be it ...128k dead, no TV signalI got 128k spectrum (heatsink model) from a friend of mine. He told me that speccy is dead, and he doesn't know what's wrong with it. When I plugged…
... enugh to put a +2 ULA into their toast
> ... in 1985) has a AMSTRAD ULA. I remember it broke when ... issue 9G) that have this ULA.
You can see some issue board ...Spectrum ULAHi new to forum ,and have been a speccy owner/fan since the begining{like most 30 somthins on this forum !) Anyway what i want to know is the ULA th…
... to know is the ULA the same from issue 3 to 3B ... ?[/B]
Yes! All the ULA ... that 16k speccys were only issue 1 [/B]
... a lot of the second issue were 16K machines also. ... /> [B]I have an issue 2 board for spares the memory is ...Spectrum ULAHi new to forum ,and have been a speccy owner/fan since the begining{like most 30 somthins on this forum !) Anyway what i want to know is the ULA th…
... the memory chips off the issue 2 and solder it back ... correct memory chips for the issue 2 anywhere?
I ... a ULA as well as i have used it on another board ...Does anyone have any working Ferranti's?Does anyone know where I might get hold of a Ferranti ULA5C112E-3?? I think this is the problem with one of my rubber key 48K's as it otherwise wor…
... ULA fitted it Type 6C001"
I assume its an issue ... 2 you have, it must be.
The ULA ... describe sounds like an issue 2 speccy with a ... ..... if on an issue2 board, the screen colour is ... and the ULA checked out fine on another board, could it ...Does anyone have any working Ferranti's?Does anyone know where I might get hold of a Ferranti ULA5C112E-3?? I think this is the problem with one of my rubber key 48K's as it otherwise wor…
... describe sounds like an issue 2 speccy with a ... board (funnily enough, an issue 2) was cured by replacing the ULA ... ..... if on an issue2 board, the screen colour is ... and the ULA checked out fine on another board, could ... />
If your board is in a + case, you ...Does anyone have any working Ferranti's?Does anyone know where I might get hold of a Ferranti ULA5C112E-3?? I think this is the problem with one of my rubber key 48K's as it otherwise wor…
... before - what happens is, the ULA get very hot and the ... own board (funnily enough, an issue 2) was cured by replacing the ULA ... what is happening with my issue two anyway. The sinclair research ... pretty sure its this Ferranti ULA chip.
SimonDoes anyone have any working Ferranti's?Does anyone know where I might get hold of a Ferranti ULA5C112E-3?? I think this is the problem with one of my rubber key 48K's as it otherwise wor…
... DO know I do a board swop thingy dont you? You ... send a duff board and I send you back ... working one of the same issue (if available)? It's free ... help and for the Ferranti ULA.
Regards,
Does anyone have any working Ferranti's?Does anyone know where I might get hold of a Ferranti ULA5C112E-3?? I think this is the problem with one of my rubber key 48K's as it otherwise wor…
... nose here and see what issue board I can offer as a ... right hand side of the ULA Chip. So maybe theres no ...ULA RAS, CAS cycles, refresh and "snow effect"Hello everyone. I have a question, does anyone observed timings of RAS and CAS generated from ULA? I think there may be answer to where the "snow ef…
... least 7.68ms by the ULA! If you sit in a ... the Z80, so neither the ULA or Z80 will be refreshing ... that? What version of a board are you investigating?
Issue 3 board.ULA RAS, CAS cycles, refresh and "snow effect"Hello everyone. I have a question, does anyone observed timings of RAS and CAS generated from ULA? I think there may be answer to where the "snow ef…
... since Issue 3 board.[/QUOTE]
Interestingly the Issue 4b board has ... R57 was maintained through until issue 4, even if never ... /> See 1.3 Modifications - Issue 1 Board, sections (b) and (c ...
have the 6C ULA, 6C001e-6 datacode 8344 and ...Composite Video output problemHi everyone, I?ve got a problem that?s really bugging me. I have one Spectrum 48K and one Spectrum +3, both with Composite Video output modification…
... revision 3 board. I was thinking there might be an issue with ... this revision or the ULA perhaps ?
Issue 1 ZX Spectrum for SaleBefore I go down the route of shoving this on ebay, I would like to offer fellow WoSsers the opportunity to express their interest in this item. It …
Pictures of the my Issue 1 Spectrum now appear at:< ... spider for the ULA (as a chip rather than a circuit board).
