-
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 ... -
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 ... -
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 ... -
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 ... -
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.
... -
'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 ... -
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 ... -
Composite picture qualityI have read many many discussions here about the composite video modification of the Spectrum 16/48K models. I have choosen one of the simplest comp…
... . Also the ID of C78/C80 changed between issues/boards ... space permitting)
Issue 3B schematic
C5 1uF ceramic ... )
C78 22uF 16V Low ESR
Issue 4A schematic ... )
C78 22uF 16V Low ESR
Issue 4B schematic ... -
Spectrum+ keyboard problemHello all! I was wondering if someone here could give me some hints with my Speccy+. The problem is that I replaced the motherboard of my Spectrum+ …
... Spectrum+ (the new one is issue 3B) and now the "STOP"-key ... -
Spectrum 48k with no serial number ?I've recently aquired a curiosity - a rubberkey case that has no embossed serial number (usually red or green) under the edge connector. despite the…
... the blue keypad, and an issue 3B mobo - the case appears to ... be an issue 1, as it has the ... -
Voltage regulator replacement?I have an 48K issue 3B that has (for unknown reasons) had one of the legs on the voltage regulator broken off. It looks like a simple replacement job…
I have an 48K issue 3B that has (for unknown reasons) ... -
48K Rubber Keyboard Membrane WantedHi i opened my spectrum up for the first time since i bought it because i was trying to find out which issue board i have (issue 3B) and shock horror…
... to find out which issue board i have (issue 3B) and shock horror ... -
Component Equivalents/substitutionsA while ago, I mentioned to somebody in a thread that we should have a list of component equivalents and substitutions so that it's easier to fix our…
... of ZTX650 in TR4 position issue 2+
BC184 ... in TR8 - TR9 position issue 3+
ZTX750 will ... , BC548 and BC549 in Issue 2+ Usually improve picture ... 2, 3 and 6 on issue 3B and
BC 549B ... , TR3 and TR6 on an issue 3B board.[/QUOTE]
... -
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 speaker ...
