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48K+ losing horizontal syncHello! I've got this 48K plus in perfect cosmetic condition and it works well except for when it gets a tad bit warmer the image rolls around. That w…
... years.
A bad electrolytic capacitor.
Power supply circuitry becoming ... -
48K+ losing horizontal syncHello! I've got this 48K plus in perfect cosmetic condition and it works well except for when it gets a tad bit warmer the image rolls around. That w…
... years.
A bad electrolytic capacitor.
Power supply circuitry becoming ... -
Faulty 128K toastrack keeps resettingHi. I have this toastrack which worked nicely for let's say 40 minutes and then a weird fault showed up. It keeps resetting over and over, sometimes…
Thats because they degrade with time. And the reset circuit is controlled by a electrolyte capacitor (amongst other things). Check the schematic for your ZX model. -
Faulty 128K toastrack keeps resettingHi. I have this toastrack which worked nicely for let's say 40 minutes and then a weird fault showed up. It keeps resetting over and over, sometimes…
... is controlled by a electrolyte capacitor (amongst other things). Check the ... -
Faulty 128K toastrack keeps resettingHi. I have this toastrack which worked nicely for let's say 40 minutes and then a weird fault showed up. It keeps resetting over and over, sometimes…
... from experience that the 1uF capacitor on the reset circuit in ... -
(Re) building a ZX Spectrum laserharpThe Cambridge show is nearing, and I want to bring my laserharp with me. Why? Because it's built around a ZX Spectrum +2: [IMG]http://benophetintern…
... fairly easy: using a decoupling capacitor and load resistor to pull ... the capacitor load to zero when there ... signal stable, I use another capacitor.
After that, I have ... -
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…
... the blue 0.47?F capacitor is soldered to. You can ... -
Computer repair questionAn ewgf-style post: I'm usually able to find my way around things, search online for solutions and a few other things, but this time I'm unsure of w…
... other than replace a bad capacitor or re-solder a loose ... -
Computer repair questionAn ewgf-style post: I'm usually able to find my way around things, search online for solutions and a few other things, but this time I'm unsure of w…
... say for sure that a capacitor is bad just by looking ... -
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…
... then I added an electrolytic capacitor of 150 ?F (you can ... correct this I added a capacitor of 560 pF from emitter ... -
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…
THE VOLTAGE OF THE POWER SUPPLY UNITCould anybody who has a ZX Spectrum 128k +2 count with a voltameter the voltage which the power supply unit gives to the Spectrum and tell me the [B]…
16k Issue 2 board and DivIDE load errorsI today got an Issue 2 16k board (thank you PMSR) that i added the logic and ram on to get a 48k machine. However, I am unable to load software from …
... a warm or deformed electrolytic capacitor change it.
Ingo ...Zx 48k after the ic7805 other problemHi everyone, i am Tiago from Portugal, and i am trying to repair a Zx Spectrum 48K. the machine didn't do anything, no image, no sound, nothing. The…
... -5V. If there is a capacitor with low resistance your next ...Just bought a Spectrum+. Doesn't work. Red bars on screen.Hi all, Something of a noob here. Having recently been on holiday, I came across a Spectrum+ in a box, with a collection of games in a shop, and, af…
... . It might happen that the capacitor responsbible of generating the reset ...strange solution with bad spectrum +2 t.v. sound2 weeks ago I bought a British 128 K ZX-Spectrum +2. At first it didn't have sound on the t.v. RF output. Adjusting L5 (IC 11: MC1376 audio modulato…
... myself had to add a capacitor of 33 ... 47 pF between ... the PCB I added a capacitor of 100 pF to ground ...strange solution with bad spectrum +2 t.v. sound2 weeks ago I bought a British 128 K ZX-Spectrum +2. At first it didn't have sound on the t.v. RF output. Adjusting L5 (IC 11: MC1376 audio modulato…
... 'll check what placing the capacitor between pin1 and 7 does ...strange solution with bad spectrum +2 t.v. sound2 weeks ago I bought a British 128 K ZX-Spectrum +2. At first it didn't have sound on the t.v. RF output. Adjusting L5 (IC 11: MC1376 audio modulato…
... .
I tried the capacitor that you suggested, but it ...Getting an 14Mhz crystal to oscillate?I am building a circuit with an 74LS32 and a 74LS193 to work as frequency divider. Though I have hit a snag, how to I wire up a crystal to make it os…
... /> Also the value of the capacitor can affect the frequency, as ...Faulty 128K toastrack keeps resettingHi. I have this toastrack which worked nicely for let's say 40 minutes and then a weird fault showed up. It keeps resetting over and over, sometimes…
It wasn't that one 1uF capacitor. I haven't radial caps left to replace all, so I started checking RAMs and guess what.... they were all checked ok so far. Will keep looking and update everyone as I go. Ordering some caps.Faulty 128K toastrack keeps resettingHi. I have this toastrack which worked nicely for let's say 40 minutes and then a weird fault showed up. It keeps resetting over and over, sometimes…
... .
If the suspect capacitor is electrolytic and it is ...Faulty 128K toastrack keeps resettingHi. I have this toastrack which worked nicely for let's say 40 minutes and then a weird fault showed up. It keeps resetting over and over, sometimes…
... ;648227]
If the suspect capacitor is electrolytic and it is ...Very weird +2 problem.After two days, I'm still fighting this grey +2. Symptoms: When I first got it, there were stray pixels on the screen, and stray lines and colours. …
I would check the diodes and chips along the keyboard decoding line. The problem happens when it gets warm, then I can't say the culprit would be a resistor or capacitor. Most likely a semiconductor, rough guess. People correct me if I'm wrong.128k +2 (grey) Ear mod - New ULA and still problemsBverstee kindly sold me a 128K ula since the one in my +2 seemed to have a broken ear in. But even with the new ULA, I still can not load games throu…
... should think about adding a capacitor in series to the input ...Needing new capacitors. Where to buy online?Hi. I need new axial capacitors for a whole bunch of Speccy boards I have. Problem is, it's been hard to buy some of them online. Some shops will onl…
Farnell?
[url]http://uk.farnell.com/jsp/search/browse.jsp?N=2031+202457&Ntk=gensearch&Ntt=axial+capacitor&Ntx=mode+matchallpartial[/url]
Minimum order of ?25.Needing new capacitors. Where to buy online?Hi. I need new axial capacitors for a whole bunch of Speccy boards I have. Problem is, it's been hard to buy some of them online. Some shops will onl…
... basically the worst kind of capacitor. If you measure a few ...Needing new capacitors. Where to buy online?Hi. I need new axial capacitors for a whole bunch of Speccy boards I have. Problem is, it's been hard to buy some of them online. Some shops will onl…
... yes you can use a capacitor with a higher voltage rating ... . And if the capacitor is used for power supply ... in circuits that use the capacitor for timing or in ac ... size. Make sure the replacement capacitor actually fits the board! :-D ...Some Capacitance Clarification =)I tried to get it in alliteration - sadly I failed. I am building a project at the moment based on Alessandro's ZX MMCSD and I have come across a no…
... up a 4.7uF Murata capacitor.
[url]http://uk.rs ...Replaced Z80 now a very dark screen!Today I dag out an old issue 3 that ive known for a long time has a faulty Z80 (M1 line) so I heat gunned it out, socketed it and replaced it with a …
... be a 1206 SMT chip capacitor stuck in a small glass ...
