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Sinclair PC 200 Error: Faulty SYSTEM serial portHi guys, this is my first post but not a happy one. I have bought 2 weeks ago an Sinclair PC200, when powerd up it shows the following message: "[B]E…
... the following message: "[B]Error: Faulty SYSTEM serial port[/B]". Any ... this? Could be an mc1489a faulty chip? I would love to ... -
128K Toastrack - Missing coil?Hiya! I recently acquired a fleabay 128K, and before putting power through it, I thought i'd open it up to see if anything looked obviously wrong (e…
... it was missing the massive coil that sits in the circle ... have one? Is it the coil I've read about that ... -
The Tripods C64 version / faulty Spectrum copies?I'm an occasional contributor to the website 'Games That Weren't' which researches unreleased games, particularly for the C64. One game they're looki…
... ? Or do you have a 'faulty' Spwectrum copy in your attic ... -
Faulty Issue 1Hi all, thought I'd document my efforts in getting another speccy working. I've never done this before so please bear with me... I recently took a p…
... 've not heard the typical coil buzz at any time so ... and I get a noisy coil buzz which changes pitch slightly ... .5V with a slightly quieter coil. Plug the TV in and ... and I can hear the coil buzz change pitch slightly in ... -
Faulty DRAM chips wanted!If you have any suspect or known faulty DRAM chips, I'm after some so I can conduct some testing. I only want chips that are DIL type, either 16 p…
... have any suspect or known faulty DRAM chips, I'm after ... -
ZX Spectrum 48k issuesHi all! A couple of days ago I bought my first 48k Speccy off ebay (I already own a beautiful QL expanded with QubIDE interface and 640k ram). It was…
... power on (continuity, tr4/tr5, coil, power connector) and the socketed ... happens the diagnostic software reports faulty reads from ram (removing the ... -
Issue with TV signal + Inductor Coil (16K Issue 2 Speccy)Hello guys, I just got a 16K Issue 2 Speccy from eBay. It was sold as not working so I knew there would be some work needed before it's working ag…
... to be with the inductor coil which gives me +9V on ... -
zx microdrive faulty/broken/not working/deadi'm looking for a faulty none working even dead microdrive if anyone has one they would part with
i'm looking for a faulty none working even dead microdrive if anyone has one they would part with -
OopsToday is a sad day :confused: Poor old rubber keys has gone t**s up. :( All i get is a black screen with a white border. Any body got any ideas …
... hear the internal power supply coil buzzing ?
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... -5v supply, faulty 4116 RAM (lower 16k), faulty ULA, faulty upper RAM ( ... 4532 32k) and faulty CPU.
faulty ULA.
... -
Ecstasy & AgonyWhile checking out the area around Chennai Central station on Sunday, I came across this crowded narrow road taken up entirely by roadside vendors se…
... you can here the little coil buzzing away, then it's ... is blown - but sometimes a faulty 4116 can cause this and ... there you've found the faulty IC and just need to ... -
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…
The coil is slightly warm (just slightly) ... be faulty ?(the Zener for example). I have already replaced, coil, electrolytic ... -
Poorly Spectrum + Fault diagnosis help needed!Hi, I've got a Spectrum+. Sometime in the past I broke it and sent it off to be fixed. It came back working good as new, but with an issue 2 board i…
... is working (this is the coil that makes the slight hissing ... (see signature below) - for example, faulty output stages (so the chip ... -
Faulty +2 Grey :(Hello everyone... i was trying to fix a +2 grey board the other day, i had it for some time now. It gave a black screen (paper and border) with two …
... a clue what the L2 coil (just under the modulator and ... [/url]
The similar coil L5 is for adjusting the ... .
I fixed my faulty +2 grey board (thanks Phu ... ferrite core on the L5 coil, but i don't see ... -
DivIDE+ and 128K HeatsinkI got my DivIDE+ yesterday and i tried it on a 48K+ at first, it worked marvelously on it, no problems at all. Today i desided to try it on my 128 H…
... cases are in fact a faulty M1 line. I wish my ... />
In my case a faulty M1 line is out of ... 3 different CPUs all have faulty ones (which they don't ... large ferric ring and a coil around it which in later ... -
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…
... machine seems to work, the coil buzzes but I have no ... clear whether you have a faulty/dead ULA, or some other ... -
Trying to fix Spectrum Issue TwoHello everybody, I bought from eBay three Spectrums - one is Issue Two and the other two are Issue 3. The Issues 3s look like they are working but t…
... re-soldered one of the faulty caps and instead of -4 ... got 4.38v and the coil is buzzing. The +12v is ... low? Maybe because of the coil? Should I put some Super ... Glue to fix the coil or is better to replace ... -
Broken ZX Spectrum? :(Hi! I bought a 2nd hand ZX Spectrum half a year ago. It worked perfectly fine when I first tried it. I put it back in its box which it was sent in, …
... by TR4/5 and the coil. This capacitor has to be ... the electrolytic capacitors near that faulty one because it is possible ... -
BeginnerIm having a go at fixing a spectrum which has been in the loft for 20 years and would like some advice please.... I have downloaded the 'spectrum se…
... likely TR4 nor TR5 are faulty.
If you haven ... .
Sometimes the inductor coil develops a fault, but that ... -
TR4 continues blowing up!The TR4 of my Speccy Issue 3 continues burning even after I changed all electrolytic capacitors and the BA157 diode. If these things serve only to h…
... measure across the two coil windings. You can do ... a short between the coil's windings. In that ... case, remove the coil make the measurement again. ... possible one of the coil windings has gone short ... />
If the coil is faulty, it should be possible to ... -
TR4 continues blowing up!The TR4 of my Speccy Issue 3 continues burning even after I changed all electrolytic capacitors and the BA157 diode. If these things serve only to h…
[QUOTE=Zorn;624138]If the coil is faulty, it should be possible to ... -
Spectrum +2 gray strong noise at TV sound outputWhat could be the reason of strong sound noise at TV channel on gray +2? In the beginning this speccy was dead, it had faulty 78S05 and ZTX650. Added…
... . So its not actually a faulty +2 you got there...
coil found on the lower left ... -
Spectrum +2 gray strong noise at TV sound outputWhat could be the reason of strong sound noise at TV channel on gray +2? In the beginning this speccy was dead, it had faulty 78S05 and ZTX650. Added…
... . So its not actually a faulty +2 you got there...
coil found on the lower left ... -
Replacing coil with other component?The purpose of the coil transformer, from what I gather in the schematics of the issue 2 spectrum, is to create 5V from about 9-10V. Would it not be …
... instantly. Beyond the coil, what component could be faulty? I have been ... -
Replacing coil with other component?The purpose of the coil transformer, from what I gather in the schematics of the issue 2 spectrum, is to create 5V from about 9-10V. Would it not be …
... as it should? or is faulty? I have not been able ... /> Measuring the voltages at the coil with a DMM isn't ... -
Poorly Issue One 16k spectrum diagnosis?Hello, everyone. :smile: I was lucky enough to buy an Issue One 16k rubber key the other week; I didn't know it was an Issue One till I opened it up…
... at the screen, the original faulty column appears almost to "shimmer ... occured the buzzing from the coil has changed pitch and "?" symbols ... -
ZX spectrum 128K + 2 (Grey one :)Hi all, I'm trying to revive a dead ZX 128K +2 (the grey one). The regulator was damaged and seemed to be feeding 7.8Volts onto the pcb. Yikes ! I…
... gun and start unwinding the coil, I have some questions. From ... a short circuit coil, any other short circuit or faulty component (that ... -
One more grey +2 with video problemsI guess I need your help again to hopefully be able to do some proper troubleshooting myself one day. Here I have a grey +2, which could be a bottom…
... that the original TR9 was faulty, but there's something else ... legs of C22). Then, measure coil T1, not only for continuity ... -
One more grey +2 with video problemsI guess I need your help again to hopefully be able to do some proper troubleshooting myself one day. Here I have a grey +2, which could be a bottom…
... voltage is applied to the coil that forms the primary winding ... current is induced into the coil of wire that forms the ... between different (parts of) the coil (winding) of the wire forming ... talk about here) or is faulty, you should get a very ... -
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 ... be able to see the faulty chip. A test ROM that ... the electrolytics first, then the coil, though.
