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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 …
... at one end of the coil will be the same as ... the other end of the coil should be an AC voltage ... a bad electrolytic capacitor, a faulty Zener diode (short circuit) or ... -
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 …
... my coil does indeed a hissing noise, could it be faulty?
coil, diode) is in good working ... -
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 …
... or more 4116's are faulty, dragging down the -5v rail ... :)
Noise from the coil is normal, especially on issue ... -
Help put this back to 16kSo this issue 2 arrived today and ive opened it up just to nosey and confirm that infact it is an issue 2. Now from the help offered in an earlier po…
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 …
[QUOTE=Renegade;784026]Coil? TR4 or TR5?[/QUOTE]
< ... ; TR5 are almost certainly not faulty. A shorted winding or two ...Faulty 48+ Help NeededHi, This is what I get when I plug in the spectrum, this is tuned in. Vid shows a reset. Any ideas, or pointers on the first thing to check. Keyboa…
... have no buzz from the coil (sick Spectrums with bad voltage ... they don't make the coil resonate - a Spectrum should have ... joy:
3) Change the Coil and Tr4/Tr5 again.
faulty RAM chip.. usually by taking ...Faulty 48+ Help NeededHi, This is what I get when I plug in the spectrum, this is tuned in. Vid shows a reset. Any ideas, or pointers on the first thing to check. Keyboa…
... have no buzz from the coil (sick Spectrums with bad voltage ... they don't make the coil resonate - a Spectrum should have ... joy:
3) Change the Coil and Tr4/Tr5 again.
faulty RAM chip.. usually by taking ...'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…
... circuit (TR4, TR5 and the coil etc.).
Also with ... TR4, TR5 or the coil is faulty, the -5V supply will be ...Help with Spectrum 128k reparationHi! I have the following symptoms with a 128k unit version 6U - On power on, black and white bars (one char width each), white background - Once po…
Ok, this may help: I hear no buzz from the coil... Does that mean that it may be faulty? 5, 12 and -5 V supply lines have proper values... How can I test if the coil has died?Help with Spectrum 128k reparationHi! I have the following symptoms with a 128k unit version 6U - On power on, black and white bars (one char width each), white background - Once po…
... from the coil... Does that mean that it may be faulty? 5 ... can I test if the coil has died?[/quote]
The ...12V ripple with lower ram installedI repaired a speccy this week. Before doing anything I replaced all caps and measured the transistors in the power section. When doing this I found t…
... decided to change the regulator coil, as it was getting hot ... problem of c50 and the coil getting hot. Now I had ... really hard to find the faulty one, since I got ram ...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…
The first test on any faulty board, is always the supply ... , is current leaking through the coil of the DC/DC converter ...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…
If TR4 is faulty and not switching on and ... the secondary winding of the "coil" (actually a transformer) from the ...help with issue 3 48k speccy after recap and new tr4 and tr5I have a 48K speccy that was not working. After recapping and replacing TR4 and TR5 it came back to life However after a short while running weird …
... .
TR4, TR5, the coil (actually a transformer) and associated ... very likely caused by a faulty RAM chip.
The ...Faulty Keyboard membraneHello, My keyboard membrane of the 48K doesn'nt work anymore, Does anybody know how to get a new one ? Thanks, Eelko.
Hello,
My keyboard membrane of the 48K doesn'nt work anymore,
Does anybody know how to get a new one ?
Thanks,
Eelko.The name gameHere's one I remembered, seeing that post about hostages... Please help me find out what it is. I checked out, and it is not hostages. First of all …
... memory, but that has proven faulty, recently. :)
Can anyone ...Lords of Midnight - TZX problemHas anyone got a TZX of Lords of Midnight Side 2. The versions on WOS & TZX Vault are both faulty as Side 2 is actually the game Psytron and not LoM.…
Has anyone got a TZX of Lords of Midnight Side 2.
The versions on WOS & TZX Vault are both faulty as Side 2 is actually the game Psytron and not LoM.
Anyone?just got three 'faulty' speccys...off of eBay - and found they all work :) I was geared up with schematics and soldering irons as well, half hoping to have to get the 'scope and LA o…
off of eBay - and found they all work :)
I was geared up with schematics and soldering irons as well, half hoping to have to get the 'scope and LA on them - oh well, don't look a horse in the mouth I guess.
I registered awhile ...ahem!.. could I have a minute of everyones time please :)ok... here's the thing. I'm looking into sourcing some spare IC's for the whole range of Spectrums - mainly memory, as that's probably the weakest l…
Faulty Athena.tzx?I've downloaded both (48 and 128) versions of Athena in tzx format from the archive. I've tried loading them in Fuse for OS X, but after the encrypti…
I've downloaded both (48 and 128) versions of Athena in tzx format from the archive. I've tried loading them in Fuse for OS X, but after the encryption beeps the Speccy crashes. Other games with the similar Speedlock protection work fine.
Is ...Faulty Spectrum?PLease can somebody help have just bought a ZX Spectrum 48K And the Hobbit game, i cannot get this game to load it crashes right at the end of the l…
PLease can somebody help
have just bought a ZX Spectrum 48K
And the Hobbit game,
i cannot get this game to load it crashes right at the end of the loading ,i have used 4 different tape recorders still with the same result,have tried ...Four faulty 48k Rubber Keyed Spectrums for SaleOkay, I've finally dug them out and decided to offer them on here, as when I mentioned them once before some people showed an interest. The circuit …
Okay, I've finally dug them out and decided to offer them on here, as when I mentioned them once before some people showed an interest.
The circuit board issue numbers are:
6A
3B
3A
2
They all have ...Last Ninja Remix (Dodgy Duplication Process) ?Hi folks, I've now tried TZXing 3 different sources of the said title. All fail on the last level at the same point. I'm wondering if anyone has co…
... fact the whole run is faulty ?
Some other tapes ...Crasched Spectrum+ 128, HELP!Hi! I recantly bought a Sinclair Spectrum+ 128 on a seconhand store. It shows random colour squares spread over the screen, mostly the upper part a…
... screen. Is this due to faulty rams or rom OR what ...Spectrum spares / repair jobsI recently bought a few faulty Spectrum 48+'s and have built a fully functional unit from the best bits of them, however this has left me with two pa…
I recently bought a few faulty Spectrum 48+'s and have ... spectrums).
Both have faulty keyboards, one keyboard works fine ...Help, What's the gameHowdo, I've managed to recapture my youth with most of the games I had as a kid but I can't remember what two games where called; Can anyone help? Th…
... this might just be my faulty memory) You had to use ...Sound on Spectrum +2/a & 3Okay, so now I've got 2 +2's and a +3 and they all have absolutely the crappiest no existant, buzzy, sound on the planet. Surely they all cant be fau…
... /> Surely they all cant be faulty.
I just cant get ...Help with a faulty Spectrum +Just bought it on eBay ( [url="http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&category=1247&item=2792353010"]http://cgi.ebay.co.uk/ws/eBayISAPI.dll…
Just bought it on eBay ( [url="http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&category=1247&item=2792353010"]http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&category=1247&item=2792353010[/url] )
actually, it was the Atari I ...Faulty Hardware, Fixers needed ! See link ;) Also Mylites2 for Mags[url="http://cgi6.ebay.co.uk/ws/eBayISAPI.dll?ViewListedItems&userid=cornishdavey&include=0&since=-1&sort=2&rows=200&rdir=0"]http://cgi6.ebay.co.uk/w…
[url="http://cgi6.ebay.co.uk/ws/eBayISAPI.dll?ViewListedItems&userid=cornishdavey&include=0&since=-1&sort=2&rows=200&rdir=0"]http://cgi6.ebay.co.uk/ws/eBayISAPI.dll?ViewListedItems&userid=cornishdavey&include=0&since=-1& ...Shameless auction plug - Four 48k Rubber Key Spectrums[url="http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=8109893134&sspagename=STRK%3AMESE%3AIT&rd=1"]http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewIt…
... all be waiting for. Four faulty 48k Sinclair Spectrums. Don't ...
