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ULA 6C001EX-7Last night I visited a friend of mine and had a look at the ULAs in his Spectrums. He has a 5C102E 8220 in a 16K issue one, a 5C112E 8237 in a 16K is…
What's the D-Sub9 by the modulator for? Joystick? RGB? Serial communication?
And is that a big grey wire next to the coil? What's that for? -
ULA 6C001EX-7Last night I visited a friend of mine and had a look at the ULAs in his Spectrums. He has a 5C102E 8220 in a 16K issue one, a 5C112E 8237 in a 16K is…
[QUOTE=Rorschak;761949]What's the D-Sub9 by the modulator for? Joystick? RGB? Serial communication?
And is that a big grey wire next to the coil? What's that for?[/QUOTE]
Seems like a DK'Tronics keyboard with Interface 1 under the ZX Spectrum. -
ULA 6C001EX-7Last night I visited a friend of mine and had a look at the ULAs in his Spectrums. He has a 5C102E 8220 in a 16K issue one, a 5C112E 8237 in a 16K is…
[QUOTE=Rorschak;761949]...And is that a big grey wire next to the coil? What's that for?[/QUOTE]
That looks like a white tie wrap? -
Harlequin clone...PCB manufactured!Using Chris Smith's detailed schematics and project notes from the Harlequin... a Speccy fan in the United States by the name of Don (Superfo) has de…
... (BC548), pin 2 is LS coil, pin 3 is 0V/ground ... and the
other LS coil.[/CODE][I][B]Mark[/B ... -
Why didnt 48k ingame music work?There were very few games that had ingame 48k music, a couple I can think of were Kung Fu Master and Manic Miner but it always sounded drained and no…
TEA2000 mod for better CVBS quality?Has anyone tried this before? :confused: [URL=http://s1063.photobucket.com/user/JRT480/media/Evenmoreperfect_zpse2505ab9.jpg.html][IMG]http://i1063…
... with various values for the coil and the ceramic capacitor and ... * that a 15~18 uH coil and a 47pF ceramic capacitor ...TEA2000 mod for better CVBS quality?Has anyone tried this before? :confused: [URL=http://s1063.photobucket.com/user/JRT480/media/Evenmoreperfect_zpse2505ab9.jpg.html][IMG]http://i1063…
... did in these 2 photos: coil and capacitor are soldered together ...TEA2000 mod for better CVBS quality?Has anyone tried this before? :confused: [URL=http://s1063.photobucket.com/user/JRT480/media/Evenmoreperfect_zpse2505ab9.jpg.html][IMG]http://i1063…
... from using a 68 uH coil followed by a trimmer capacitor ...Using VAC PSU in DC deviceHaving fixed the dead Issue 3B, I began to wonder about the PSU that came with it. It was pretty obvious what had killed the poor Spectrum as the PSU…
... to one side of the coil, for which I'll leave ...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.…
Thanks!
I think it might be also worth mentioning that there is a buzzing sound, when the Spectrum is powered. Is it the coil?Fixing my old ZX Spectrum 48K issue 4AHi Guys, I trying to fix my old Spectrum 48K. Looks like my dad used a wrong power supply as the ULA had a bit missing and so did the 7805. So I rep…
... oscillation circuit formed by the coil/TR4/TR5.
BFixing my old ZX Spectrum 48K issue 4AHi Guys, I trying to fix my old Spectrum 48K. Looks like my dad used a wrong power supply as the ULA had a bit missing and so did the 7805. So I rep…
... oscillation circuit formed by the coil/TR4/TR5.
B ...AAAARRRRR DIV-MMC ENJOY againIve recently been posting trying to get to the bottom of problems with my +48 not working with this rechid addon.Now ive finaly worked out theres not…
... being just left of the coil and TR9 just above and ... to the left of the coil.
Markings on the ...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 …
... rail it could be the coil... is it whistling?
coil to answer your original question ... re coil voltages, but there's several ...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 …
... good, then it's the coil or a RAM chip. Change ... the coil next - it's easier than ... the electrolytics first, then the coil, though.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 ...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 …
... to change the capacitors and coil. I believe the Zener diode ... work, we all believe the coil should be first thing to ...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 …
Just try changing C46 (1uf, 50v) first, if you're sure about the Zener. I've seen this take out a -5v rail also.
I've not known a coil failure to take out -5v without also losing +12v, although stranger things have happened.
BZX 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 …
... ?
I noticed my coil does indeed a hissing noise ... all the above (TR4, TR5, 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 …
... :)
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…
... poking around i noticed the coil was slightly melted:x ,i ... maybe 2 transisters and a coil but when alls said and ...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…
... correct.
The inductor coil rarely fails, but if it ...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…
ive just noticed i dont know if it makes a difference but in one of the pictures i posted a above there is a break in the solder on the leg of one of the caps next to the coil,picture also shows the state of the coil.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…
... & TR5 and the inductor coil. Replace any components found to ...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 …
... seeing either side of the coil for comparison, but after reading ...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 …
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]
< ...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…
I inserted a 220 uH coil in the +12VA line going ... of R62 and put the coil between R62 and board). That ...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…
... ]I inserted a 220 uH coil in the +12VA line going ... of R62 and put the coil between R62 and board). That ...Spectrum 48k ProblemsHi all Got my 48k today but it's playing up abit... First time i turn it on it was like this: [IMG]http://s26.postimg.org/hlg9d3f3d/IMG_20140830_…
... .
Is it the coil? DC socket? I'm leaving ...
