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First time capacitor replacementHi, I have an Issue 2 board, that i wish to start with recapping as advised on here, as they look to be all original. (Same with V3 board, but going…
... of the size as a replacement.
- 22uf 16V (C25, C28 ... -
Question about QL composite modI am servicing my two QL machines (capacitor replacement, pcb and plastics cleaning, microdrives head cleaning, 7805 replacement etc). I already fin…
... servicing my two QL machines (capacitor replacement, pcb and plastics cleaning, microdrives ... head cleaning, 7805 replacement etc).
I ... RF modulator board replacement, with the known transistor-resistors-capacitor cirquit.
Spectrum +2 little help pleaseHi all, Firstly let me say, what an amazing site this is! So much incredible detail and information, created by what looks to be a very dedicated an…
... i'll be buying a replacement when i figure out where ... an issue on my ZX. Capacitor replacement solved.
By the ... ? Although i saw an ingenious replacement module [URL="http://zx.zigg ...Screen corruption with devices on edge connector (grey +2)Hi, I've recently done a full capacitor replacement and replaced all 16x DRAM chips on my grey +2. Prior to this I would get a corrupted screen…
... 've recently done a full capacitor replacement and replaced all 16x DRAM ...The Disciple clone... doable?Hi. As a spectrum user in the 80's this was the dream interface all-in-one for me. I have a 48k+ and planning on get a 128K toast-rack later. Anyway…
... short, the 128K needs a capacitor replacement and a new membrane, but ...The Disciple clone... doable?Hi. As a spectrum user in the 80's this was the dream interface all-in-one for me. I have a 48k+ and planning on get a 128K toast-rack later. Anyway…
... short, the 128K needs a capacitor replacement and a new membrane, but ...Composite mod display problemI'm fairly ham-fisted with a soldering iron but I thought I'd have a crack at the composite mod on two of my 48K rubber keys, as I'd already opened o…
... a crack at the C25 capacitor replacement to begin with and have ...First time capacitor replacementHi, I have an Issue 2 board, that i wish to start with recapping as advised on here, as they look to be all original. (Same with V3 board, but going…
... be safely powered.
Capacitor replacement is a fairly safe operation ...Spectrum Missing -5vMy Spectrum is "almost" booting, just when you expect the (C) 1982 Sinclair Research to appear it just displays flashing squares on the screen :( I …
... 't do it, it's capacitor replacement time! Always transistors first, though ...Spectrum+ Issue 3b customization and repairHi everybody, I've got a Spectrum+ that shows exausted electrolytics capacitors issues such as poor colors on the screen and speaker noises. I was go…
... be safe to proceed with capacitor replacement.
Your screenshot shows ... involved in this fix during capacitor replacement, that they are replaced in ...TR4 or TR5?My issue two gives horizontal bars on bootup. Flicking reset takes it to copyright screen though. I measured voltages and got 4,9V, 11,99V and -4,3V.…
I'll second Mark's suggestion - I've seen boards producing out of tolerance -5V, capacitor replacement will sort this out.
In my experience TR4/TR5 are either 100% alive or 100% dead :)
BNew user with a dead 48k issue 2Hello all I've found my way here from watching some excellent youtube videos by Joulesper Coulomb in an attempt to fix a issue 2 rubber key 48k I bo…
Thanks :)
Yeah I think a capacitor replacement is probably inevitable. The chap I bought it off of said it had been in the loft unused for 20 years so they are probably in a bad state.ZX Spectrum 48K Issue 3, loss of -5V rail.Hi all, I've googled this problem and poured over the electrical diagrams for the circuitry concerning the power supplies and I believe I know what …
... /> Edit: nice job on the capacitor replacement above, very neat work :)
ZX Spectrum 48K Issue 3, loss of -5V rail.Hi all, I've googled this problem and poured over the electrical diagrams for the circuitry concerning the power supplies and I believe I know what …
... /> Edit: nice job on the capacitor replacement above, very neat work :)
capacitor, while not touching the can ... , but the seating of the capacitor on the board is way ...Can someone help me...Hey all Well after my second complete cock up off ebay I'm feeling pretty deflated now regarding spectrums... First one I ordered was a +2A which h…
... had some preventative maintenance (membrane replacement, electrolytic capacitor replacement etc.) is going to ...I have returned! This time with no tape problems!Hello all. Some of you may remember me from about a month or so ago with this little spawn of satan... :lol: [IMG]http://www.ridgedpixel.co.uk/proj…
... same time.
Alternatively, capacitor replacement kits are available on [URL ... ://www.ebay.co.uk/itm/Replacement-axial-capacitors-for-ZX-Spectrum ...48K Upper memory issues?Having more issues with the 48K spectrum I just fixed that had the black screen in this thread [URL="http://www.worldofspectrum.org/forums/showthread…
... ; TR5. Also the standard Electrolytic capacitor replacement.
Now powers on but ... the tracks from a replaced capacitor had lifted and was shorting ...Spectrum CapacitorsLooking for some opinions here, if I may? In the 80's and 90's I used to repair Spectrums and other machines for a living so I'm reasonably famili…
... who thinks that unnecessary replacement is to be avoided.[/ ... +), which should do fine as replacement for electrolytic capacitors.
... tend to shy away from capacitor replacement as well, if it ... Preferably by a ceramic capacitor of same value if available ...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 …
Back to capacitor replacement.
Maybe last time ... , smaller diameter , capacitor as a new replacement? A radial capacitor of the same ...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 the same time for capacitor replacement
The other thing ...Using a thermal camera to fix speccy's.Hi All, Thought I'd share another repair... Got a board that collapsed the bench supply straight away ( I run a bench supply and give it just enou…
... really difficult to manually measure capacitor temperature alongside ambient, as sometimes ... image.
The whole capacitor replacement concept is actually quite contentious ...Replacement power suppliesIs it possible to get a replacement power supply for the old speccys? The high Amperage is a problem: 1.4A for the rubber-keyed 48K. Know where you c…
Is it possible to get a replacement power supply for the old speccys? The high Amperage is a problem: 1.4A for the rubber-keyed 48K. Know where you could get one that would handle it? It wouldn't need to be an original.Replacement chipsAfter much digging around on here, it seems to be the general consensus that the ULA could be causing the problems im having (spectrum is deaf to 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…
... . It looks like a simple replacement job that someone ham-fisted ...replacement +3 psuok, who would be kind enough to help an idiot build a replacement PSU for the +3 / +2a , from a PC power supply? Guesser has already helped out a gr…
... help an idiot build a replacement PSU for the +3 / +2a ...Best replacement for ZTX650?What is the best replacement transistor for the obsolete ZTX650? I've read that TIP31 will do the trick. Is there a decent equivalent from the BC or …
What is the best replacement transistor for the obsolete ZTX650?
I've read that TIP31 will do the trick.
Is there a decent equivalent from the BC or others transistors?Spectrum ULA replacement!Hi gang.. The Speccy 48 ULA Replacement is *almost* here ;) There has been lots of activity in building the CPLD board, sorting out some irritating…
... ..
The Speccy 48 ULA Replacement is *almost* here ;)
Anyway, the machine with ULA replacement doesn't quite boot up ...Replacement loudspeaker for rubber key 48kI'm fixing one of my rubber key 48k. Just ordered a membrane for it but I also need to find a replacement loudspeaker for it. The original some how q…
... also need to find a replacement loudspeaker for it.
The ...ULA Replacement WORKS !Hi chaps. Lots of activity over the last couple of weeks, and _finally_ we have [B]a working ULA replacement[/B] !! The analogue components such …
... have [B]a working ULA replacement[/B] !!
The analogue ...
