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Microdrive fault.I guess some of you may know this... My microdrive has a problem: the motor starts running as soon as I plug the computer in, and won't stop! It is …
... is not the interface's fault, as it behaves the same ... -
Noisy display faultI've been given an Issue 3 48K Speccy PCB which is in good working order except the main display area has slight changes of shade loosely following a…
... sound from the switching PSU coil).
In my experience ... is particularly severe. The PSU coil is quite loud on this ... -
Spectrum coilFerrite bobbin, two coils wound on top of each other. Bottom coil is 15 turns, top coil is 36 turns. This is the coil found in the 48K spectrum. Ok…
... each other. Bottom coil is 15 turns, top coil is 36 turns ... . This is the coil found in the 48K spectrum ... /> Ok, I want build a coil to the same spec, using ... bobbins? The rest of the coil construction is simple, it's ... -
Black paper, white border. Ram fault?We have a speccy that wont work properly. When we power it up, we get white border around a black screen. We swapped the rom and ula with a working o…
We have a speccy that wont work properly. When we power it up, we get white border around a black screen. We swapped the rom and ula with a working one, and we got the same result.
is this a ram fault? How can we check ram chips? -
Unconventional way of diagnosing a faultHi everyone Some time ago I got a 48k Spectrum (issue 3B board) in a pretty bad condition. I believe the power supply transistor TR4 failed, causing…
... short circuit over the coil, which caused the coil and ferrite core ... -
Hardware fault - HELP!I bought a speccy 48K (rubber) on Ebay. I was delighted when it arrived. It was in PRISTINE condition, it looks brand new! However, the machine has a…
... ! However, the machine has a fault. The seller has no idea ... that the machine has a fault, so I'm reluctant to ... condition...
So, the fault? Well, SOME of the keys ... conclude the hardware is at fault. A couple of questions:
Spectrum 48k Fault - anybody seen this before?Hello, I have two 48k spectrums that exhibit the same fault. Black border, paper area is full of columns of wavey lines. I have posted a screen sho…
... spectrums that exhibit the same fault. Black border, paper area is ... anybody seen this kind of fault before that could let me ...Spectrum +3 suspected memory faultHi, I've been using my +3 for the first time in a while and found that some games have problems with the display becoming corrupted and sometimes cr…
Issue 2 Speccy faultHi Guys, I'm really hoping someone can help me with a fault that has just developed on my issue 2 speccy. After perservering for some time with usi…
... can help me with a fault that has just developed on ...Possible design fault in +2A/+3 power pack. Fix?It's the second time a +3 power pack ceases to work when I make a short while using the scope to diagnose a +2A/+3 computer. And it's the second tim…
... , and... why the 2N2222 became fault. So I peeked at the ...Spectrum+ fault - lines on boot screen, freezesThe ZX Spectrum+ I bought in the car boot has a fault. When you boot it, it's displaying the Copyright screen, but each character position has a vert…
... the car boot has a fault. When you boot it, it ... any reason to be at fault there), and the lines went ...Microdrive using simple coilWhile listening to my iPod using cassette car adapter I came to idea - why not doing the same for the microdrive? Anyone ever tried that? Do you thin…
... ? Do you think a simple coil in the cartridge could do ... 120 kb/s and the coil would produce magnetic impulses to ...The rescue of a coil.The problem at hand was a known defect transformer from the switching convertor inside a Spectrum. Both windings are not interrupted and not intercon…
... How to identify a defect coil, as nothing special is ... self inductance, a good coil showed some 50 uH for ... winding of the defect coil showed just some 5 ... the outside of the coil is cooled at the air ... real test. Removing the coil from a working Spectrum took ...Faulty rubber speccy - advice neededHello all speccy hardware gurus :) Recently I moved to a new flat and after a long time have some space (and time) to dig out my old Speccy hardware…
... one of them causing the fault. The result was the same ... buzzing comes out from the coil. When that buzzing becomes steady ...Difficult to find upper RAM fault.I've recently repaired an issue 3B 48K Spectrum that had a tricky to diagnose upper RAM fault, so I thought I'd post a report of what I found here. …
... tricky to diagnose upper RAM fault, so I thought I'd ... Spectrum. This usually indicates a fault with the upper RAM or ... was unable to find any fault by testing from BASIC.
fault from BASIC. I can only ...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 …
The purpose of the coil transformer, from what I gather ...Interesting Keyboard FaultWhy-oh-why do I keep buying half-dead Speccys off fleabay. Bought this one as a source of spares, it was listed as having a non-working keyboard due…
... due to a possible ULA fault, I had a correct (but ...Yet another glitchy graphics 48kHeyo, I'm new both to the forums (sorry if this is the wrong forum) and to Spectra I'm afraid, picked up a 48k from a steam fair sale thingy (not th…
... . Now it'll turn on, coil hum and spew out some ... it in this state! My fault for being impatient) but not ...Video fault on issue two ZX boardI've trawled the Internet and drawn a few blanks as to where to look to resolve the fault with my issue two board. I'm hoping a few of you knowledgea…
... to look to resolve the fault with my issue two board ... anything similar sounding? Perhaps a fault on the LM1889N?
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 ...Newbie with a faultHi all just joined after digging my spectrum out of the loft after 30 years, it was put up there because it had a common fault I remember from back i…
... because it had a common fault I remember from back in ... sure this is a common fault.
Many thanks. btw its ...Guess the video faultI've two dead flesh Spectrums, one a 16K issue 2 outputting white with a tinge of blue (not as extreme as photo shows) with two pink horizontal lines…
... wrong? Is either a caps fault?
16k:
[IMG ...Toastrack fault - anyone recognize it?Hi I took a chance on a toastrack on eBay lately although it had a fault. The problem can be seen on the linked picture below. The problem sta…
... lately although it had a fault. The problem can be seen ...Issue 1 schematics?I'm fault-finding an issue 1 board. So far I've found a hot memory chip and snipped it's supply legs, then swapped the burnt-out 7805 for a switched…
I'm fault-finding an issue 1 board. ... get a healthy 5V. No coil buzz though, and not sure ...help with my original issue 3b from when i was a teen. possible lower ram fault.hello, well ive tried to fix my old speccy, but haven't made much progress. could you help me out with some diagnosis. the fault occurred about…
... some diagnosis.
the fault occurred about 13years ago whilst ... the upper memory but the fault is still there.
fault? or is my rom scrambled ...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 Spectrum Issue 4S composite video fuzzy (horizontal blur)Dear people of WoS, Thank you very much for taking the time to read. I have an Issue 4S I recently acquired and planned to fix up as a gift for a…
... messy resistor mod to the coil
I observed the IC ... voltages show on the WOS fault finding page i.e. 5v ...ZX Spectrum +3 keyboard faultHi all I've powered on my zx spectrum +3 for the first time in a couple of years. It seems to have developed a fault with the cursor keys. I can'…
... seems to have developed a fault with the cursor keys. I ...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…
... />
regarding the speaker - the fault on yours could be the ... a spectrum ;) ) - or the voice coil - the coils very fine connections ... - Spydas board had this exact fault, which was also fixed :)
