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Voltage regulator replacement?I have an 48K issue 3B that has (for unknown reasons) had one of the legs on the voltage regulator broken off. It looks like a simple replacement job…
... the legs on the voltage regulator broken off. It looks like ... could do.
The regulator is marked:-
[code]T ... -
Missing Voltage RegulatorHello all and a very merry 2-days-after-the-speccys-25th-birthday to you all! Okay, I've just received my brand spanking new 48K keyboard membranes …
... reason ripped off the Voltage Regulator and heatsink. Is there anything ... -
7805 Regulator HelpI am hoping to replace the 7805 regulator in my issue 3 48K Spectrum soon. Unfortunately I don't know exactly what to buy to replace it with (my fat…
... hoping to replace the 7805 regulator in my issue 3 48K ... -
Question about 7805 regulatorOne of my common practices when I service a ZX machine, is to replace the electrolytic caps as well as the 7805 regulator and some times the ztx650 t…
... used the same 7805 voltage regulator but totally by accident I ... uses an 78S05 regulator which is a 2A regulator. That got me ... showing a regular GL7805 (1A) regulator, and the ones on my ... service guide...
"78S05 2A regulator can be used, but hardly ... -
Grey +2 regulatorIv just checked the regulator and its a TS2940. Could someone tell me the equivalent please?
Iv just checked the regulator and its a TS2940. Could someone tell me the equivalent please? -
RECOM pin compatible DC-DC 7805 regulator replacementsFinally got myself sorted out now. If you want to purchase chips send me an email to [email]alistair@alistairsserver.no-ip.org[/email] with your payp…
... />
I've replaced the regulator in my spectrum+ with one ... -
Plus D Voltage Regulator OrientationHi, I?ve got a Plus D Disc Interface circuit board without case from a friend. Sadly he sends it to me without care for proper packaging. So it arr…
... three pins from the voltage regulator tear off.
... about the orientation the voltage regulator was soldered.
... .
The voltage regulator has printed "F M0247 MC7805C ... install a newly buyed voltage regulator.
Is ... -
ZX Spectrum Pre-regulator DesignCarrying on from the "[URL="http://www.worldofspectrum.org/forums/showthread.php?t=44486"]Issue 2 crashes after about 30 mins[/URL]" thread... [QUOT…
... ][U][B]ZX Spectrum Pre-regulator Design[/B][/U]
regulator circuit. This is some extra ... by the 7805 internal voltage regulator and heat sink.
Instead, the pre-regulator circuit helps out with the ... -
7805 RegulatorGonna order some spares off CPC and I need a regulator for a 48k 3b. Any quick advice on which one of these is best ? [URL="http://cpc.farnell.com/…
... CPC and I need a regulator for a 48k 3b.
regulator&Ntx=mode+matchallpartial& ... ;Ntk=gensearch&Ntt=7805+regulator&Ntx=mode+matchallpartial& ... -
Character wobbleHello, I have an Issue 2 board which shows vertical character wobble. This happens for a few minutes followed by a few minutes of character sta…
... replaced with a
Murata switching regulator. All power rail voltages are ... -
Replacing voltage regulators - need to sanity check a few things pleaseHi Everyone I'm in the process (with a lot of help from some friends at Greenford Computer Club), of giving my three Speccys some much needed prev…
... a 78S05 5v 2a voltage regulator in the +2, and ... 5v 2a switch mode regulator in order to reduce ... regulator, or whether to use something lower-rated, such as a MuRata ... 2450 5v 1a switch mode regulator. Similarly, I also need ... 48K should get a MuRata, or if the 1a ... -
Power supply voltage regulator circuitRelating to [url="https://www.worldofspectrum.org/forums/discussion/56142/"]this topic[/url] I have managed to acquire this little accessory, which I…
... /> It acts as a voltage regulator undoubtedly but I am wondering ... -
Harlequin 128k??Hi peeps... I've seen that you can do a 128k version of the Harlequin board. Is it just the standard board with different chips or is it a dif…
http://www.digikey.com/product-detail/en/murata-power-solutions-inc/OKI-78SR-5-1.5-W36H-C/811-2692-ND/3438675
This is a regulator that I use for layout pcb, about $4.00 -
ZX Spectrum 48k output yellow and jumpyI have a ZX Spectrum that I modded for composite output a few years a go. Lately they output started to be a bit jumpy during the first half hour. Th…
... and taking away the voltage regulator (7805) and installing instead a ... -DC converter there (e.g. Murata OKI-78SR). Then I would ... -
Disabling the ROM without removing the whole thingHi! I've got my hands on a non-working issue 6a. I suspect the ROM may be bad, but other things may be faulty as well. I've read that in an otherwis…
... 7805 voltage regulator was changed to a MuRata switching 5V regulator, once again ... -
Not bored with the Boards.Going through some old tapes stored rather badly I came across an unlikely item that that I must have stored away quickly with other low grade items …
... guv"!) after fitting a switching regulator to a 48k Spectrum
regulator on a bit of metal ... interesting variation is the modifed MuRata ones that Retroleum sells . I ... -
Not bored with the Boards.Going through some old tapes stored rather badly I came across an unlikely item that that I must have stored away quickly with other low grade items …
...
Retroleum offers a MuRata switch mode regulators specified as ...
[url="http://power.murata.com/en/oki-78sr-5 ... c-1.html"]power.murata.com/en/oki-78sr ... /3x-Switch-Mode-5v-Regulator-replaces-7805-for-ZX ... 3x-Switch-Mode-5v-Regulator-replaces-7805-for-ZX ... -
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…
... decoupling caps 1-8 with - Murata 1μF Multilayer Ceramic Capacitor ... /> Also will exchange the power regulator with -TRACO Power (TSR 1 ... -
Replacing voltage regulators - need to sanity check a few things pleaseHi Everyone I'm in the process (with a lot of help from some friends at Greenford Computer Club), of giving my three Speccys some much needed prev…
... regulator, or whether to use something lower-rated, such as a MuRata ... -2450 5v 1a switch mode regulator. Similarly, I also need ... 5V DC/DC converter / switching regulator would be suitable.
regulator), the inside of the ... -
Replacing voltage regulators - need to sanity check a few things pleaseHi Everyone I'm in the process (with a lot of help from some friends at Greenford Computer Club), of giving my three Speccys some much needed prev…
... . Ended up fitting 1.5a MuRata switch mode regulators in both ... 2a Traco Power switch mode regulator.
Power wise, all ... -
What % of WOSSERS use "old school" tape loading when playing their Speccy games.My guess is .000000001% ( but I might be slightly out on this! ) Do people still enjoy doing it "the old way"?
... a 7805 three terminal voltage regulator chip. This takes the nominal ... by Recom, Traco Power, or MuRata.
[url=https://www ... been made aware of the MuRata types as well. [url=https ... .co.uk/results.php?q=MuRata]Retroleum sells them[/url].
About the Disciple heat problem.I was wondering if anyone knows how to solve the problem that Disciple interfaces have that start losing it after some time of usage. I know that the…
... a sinkcooler on the voltage regulator but I don't know ...Broken ZX 48kHey all. I have acquired a broken ZX 48k. It looks in good condition - tried the membrane and it is working with my other 48k very well. When you tu…
... is just after the +5V regulator), but nothing else was tempered ...Speccy MTBFHi, Looking at the old (issue 1-2) PCBs, they do look like someone knocked them up in an etching bath/with a soldering iron in their shed but has th…
... imagine that the 7805 voltage regulator and [drink spill induced] keyboard ...+3 psu schematics and partsHi everyone. Does anyone have or knows where to get the +3 psu schematic? I'm trying to repair one but i cant find any info on the parts reference. …
... reference. For example: A D1046 regulator (i think it is a ... regulator).
The psu outputs ...Did all Spectrum 128Ks have that large heatsink?Question as per title. I can't seem to find the answer to this. I'm sure I've seen a picture of one without it. Would this be because someone has car…
Question as per title. I can't seem to find the answer to this. I'm sure I've seen a picture of one without it. Would this be because someone has carried out a voltage regulator mod in order to do away with the need for it?My new Spectrum 128K+2A...Hi guys, As most people here, my first micro computer (1986) was a Spectrum (128+2 grey - I'm in France). I sold it near 1990 to buy my 1st atari ST…
... with it, exept the 5V regulator gone dead one time, and ...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…
... looks just like the 7805 regulator (it has a metal back ...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…
... overheat and shatter. The 7805 regulator also blew up causing quite ...how to set voltage regulator to the correct setting ?On the power supply that is broken it says AC adapter INPUT : 230v 50Hz OUTPUT ; 9v 200mA Regulated On the variable voltage adapter i have the…
On the power supply that is broken it says
AC adapter
INPUT : 230v 50Hz
OUTPUT ; 9v 200mA
Regulated
On the variable voltage adapter i have there is a sliding switch with various different voltages 3v, ...
