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I killed my SpectrumMy room was a mass of leads.... and I plugged my NES transformer into my ZX Spectrum +2 accidently, frying it :cry: , am I screwed? or is there somet…
The NES PSU is a 9V AC, 1. ... equivalent of plugging the right PSU in 25 times a second ... doesnt.
The voltage regulator chip is almost certainly a ... is certainly replace the Voltage regulator chip, a very easy operations ... -
Spectrum more loved than C64It just occurred to me that the Spectrum must be more loved than the C64 these days. After all, it has been more than a year since an update was made…
... /> Read the forums. Questions about PSU's are rare but will ... and polarity required for a replacement transformer.
More common ... project is creating a CPLD replacement. This project and the ethernet ... -
True Spectrum laptop (no emulation)[url]http://user.tninet.se/~vjz762w/[/url] Hi All, I have build a speccy laptop, battery part is not ready yet.... I did it on 2 days, I will put s…
... polarity to take a Speccy PSU unmodified.[/QUOTE]
Yeahh ... show that there was no regulator at all and measuring
Is it possible to use external power supply for +-12; +-5 for ZX SpectrumRecently I acquired a damaged Sinclair ZX Spectrum, issue 3B. According to the maintenance manual I have to replace TR4 and TR5. These type of transi…
... to fix the ram or psu switching circuit first. Quite often ... , but TR4 was dead. After replacement power supply voltage still drops ...PSU queryHi all, just one quick question. Are Spectrum PSU's compatible with ZX81's? I've just bought an '81 off of Ebay, which was sold as "working, but the …
... you do stick the PSU plug into the EAR ...
As for whether the PSU will work, it depends. The ... It uses a standard 7805 regulator for this which requires a ... input side, hence a 9V PSU.
If you ... -13V (unloaded) at the PSU, which works out at about ...+2 grey PSU capacitor changeHi I opened up a +2 grey power supply (2.1A max output) unit in order to replace the aged electrolytic capacitor inside, just like I always do with …
... the plastic box of the psu since that big capacity values ... i actually encountered a grey psu that had a 4700uF cap ... be ok usind 4700uF as replacement right?4116 DRAM for 48KSomeone told me I got faulty RAM in my broken 48K. They should be 150ns, right? What would be a good place to buy them from?
... lower)
* Replace +5 regulator with switching regulator
* Document this stuff ... small PCB as plug-in replacement128k heat sink - ULA problems and a hintHello, I had two ZX Spectrum 128k with a similar behaviour. One item worked only a short time after switching on and then there were increasing RAM …
... say that heat from the regulator's heatsink is causing the ... anyway.
A 7805 regulator shuts down when it gets ... with a regulated 8.5V PSU will help, but the long ... output current from a 7805 regulator using a TIP3055 power transistor ...128k heat sink - ULA problems and a hintHello, I had two ZX Spectrum 128k with a similar behaviour. One item worked only a short time after switching on and then there were increasing RAM …
Any linear regulator is going to get hot ... heat in that little 7805 regulator) and you're only ... can put a bigger regulator in but you still have ... the route of changing the regulator, there are "simple switchers" ... board may be a good replacement for the 7805 if ...Which Clone?My first experience with a speccy was at an after-school club (I remember playing horace goes skiing and ghostbusters on it). But here's the reason …
... Interface I PCB, and the PSU (if you were brave/daft ... 'tronics was the most popular replacement keyboard.
One thing to ... keys on some of these replacement keyboards was prone to wearing ...Issue 2 Spectrum overheating keyboard membraneI think I have an issue 2 ZX Spectrum. I don't want to take it apart again as I had problems replacing the keyboard membrane. With Interface 1 conne…
... 1 connected or is my replacement membrane faulty ?[/quote]
...
a) The internal +5V regulator is a simple, robust, but ... br /> 2) Replace internal regulator with a low-drop version ... and thus bypass the internal regulator entirely. Has anyone tried that ...48k + Power supplyHi, Anyone know where I can get a replacement PSU for the 48k Plus? Nothing on Ebay at the minute. Looks like the end is Imminent for my one! Tha…
... micro atx psu strapped onto the +5 (where the regulator would of ...Dead 48K Speccy.Blow this up as a child... thought I'd get it down from the loft and see if I can repair it. Upon power up, it displays this: [IMG]http://i266.photo…
... be checked at the 7805 regulator). And the Spectrum internally generates ... - should be easy to find replacement), or an ULA with damaged ...Dead 48K Speccy.Blow this up as a child... thought I'd get it down from the loft and see if I can repair it. Upon power up, it displays this: [IMG]http://i266.photo…
... be checked at the 7805 regulator). And the Spectrum internally generates ... - should be easy to find replacement), or an ULA with damaged ...Any help appreciatedHello, I notice that people have posted their PC related hardware and software woes on this forum before and the more technically minded among you h…
... between it failing and the psu replacement :)PC Cooling recommendationsLast week I bought an uber gfx card (for me, normally I stick at least two gens back, but long story short - it was a cheaper option than what I had …
i think you can get a 450 psu for 40 quid or something. ive got one of those case fans, that just a replacement of the metal side of the pc.
i guess the fan on your graphics card is blowing the hot air out and the psu can't keep up.If I want to create a power supplywell, I'm doing a fair bit of travelling with my leads and wires and computers and speakers and stuff,so I thought of making a little device out of a…
... device requires 300mA and the PSU supplies 500mA, then thats fine ... is simple, use a 7805 regulator circuit.
SSpectrum 48K with a thyristor PSU possible?Is it posssible to use a Spectrum 48K with a thyristor switched PSU? I have a PSU with a thyristor, 4 diodes, one electrolyt capacitor, some resistor…
... voltage regulator! The use of a transformer in the (switched) PSU is ...component out?I would like to connect ZX48K to plasma TV with component cable. I read somewhere that signals are on the expansion edge connector. Do I need somethi…
... switching transformer, and the 7805 regulator, so he can feed 5V ... switching 12 volt external PSU. Between the PSU and the ZX 48K ... case. The cable from the PSU goes in the case. Then ...My Spectrum has gone a bit dud since doing some Mods, HELPMy father in law and I did some modifications to my 48K rubber key Spectrum last weekend, and now it seems to be very keen to crash, especially when …
... used as a drop-in replacement. There's many ways to ... a 7805 with a switching regulator, often this involves parts ... wiki/Low_dropout_regulator"]low-dropout[/URL] regulator, and input a [I]regulated ... (around 6~7V depending on regulator type).
Does ...My Spectrum has gone a bit dud since doing some Mods, HELPMy father in law and I did some modifications to my 48K rubber key Spectrum last weekend, and now it seems to be very keen to crash, especially when …
... wiki/Low_dropout_regulator"]low-dropout[/URL] regulator, and input a [I]regulated ... (around 6~7V depending on regulator type).[/QUOTE]
... hard-pressed TR4/5 switching regulator to work a little ... on "9v" from the PSU to operate normally. Not certain ...Remove +12 Volt itemsWhich items can be removed on a ZX48K issue 4b PCB if I don't need the +12 Volt? Micky
... might like a plug-in replacement for the Speccy's lower ... possibly cause problems. The 5v regulator (7805) is then required to ...Two Odd Spectrum 128K FaultsI also have 2 Spectrum+128 machines with heatsinks. 1. Did not power up properly - I replaced the 7805 regulator and cleaned the edge connector and …
... properly - I replaced the 7805 regulator and cleaned the edge connector ... only find 1 x UK1850 PSU to try the machines with ... , so it could be the PSU.
[/QUOTE]
Do you still have the same speccie as when you were young!If so - how old is it now - and is it still working? And does it have rubber keys!?
... were transplanted again into a replacement (genuine) rubber-keyed case and ... it's original box with PSU (again, replacement but genuine) etc ... The ...How to fix dc voltage on a 48+ psuAfter dinner, after a womble video out mod on a "new" purchased 48+ , just in the remaining time I tested the voltage of its psu and, surprise surpr…
... tested the voltage of its psu and, surprise surprise, the result ... I tested a +2 grey psu too, and it gave me ... V. I opened the 48 + psu and discovered that there were ... />
the PSU is completely unregulated, the voltage regulator and other supply ...PSU differences for the n00bHi all, im the [B]n00b[/B] in question lol Sorry folks in advance for this cos its prolly been asked a million gazillion times! Im currently in po…
... 128 and is there a replacement 'generic' supply and what are ... 9v DC supply so a replacement is easy. I can't ... />
If you use another PSU DON'T JUST PLUG IT ...Who can repair a 48K Spectrum?My Spectrum is broken, please see: [url]http://www.worldofspectrum.org/forums/showthread.php?t=29351&highlight=7805+heat+sink&page=2[/url] Does anyb…
... ;462059]Is it the 7805 regulator that you are talking about ... composite video conversion as a replacement, but at some point in ...Any retail workers here with tales of idiot/time wasting customers?Having seen the tread about people smiling on supermarket adverts I could tell you that The customer is NOT always right. Where I work theres some r…
... mins they gave me a replacement.
I got that home ... all. I recently sent a PSU back after having it for ...Maximum number of Spectrum devicesHi! What is maximum number of devices i can connect to my rubber key Spectrum? Is there somekind of limit? Now i have Interface 1, Microdrive, Zx p…
... invest in a grey +2 PSU, as it apparently is compatible ... ]
The internal 7805 regulator offers only 1 Ampere (5 ... Ampere or 5 Ampere type regulator, but if you want to ...Recapping your SpeccyHas anyone ever done it? I have several vintage amps, tuners, cassette decks that have been recapped. So just wondering are there many on WOS who ha…
... the machine to do cap replacement.
As a matter of ... supply units (+3 and +2a psu has lots :( )
I ...
