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How much power can I pull from a +3?Hi guys (and gals), Does anyone know how much of a load I can draw from the 5 volt line (lower pin 3of the expansion port)? I'm needing between 500…
... reference, this PSU uses a 723 regulator for the +5V, an LM340T12 ... -
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& ... -
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 ... -
+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. …
The D1046 is not a regulator, it is a transistor 2SD1046. ... the pass transistor of the 723 voltage regulator circuit that forms the ... also have to replace the 723 IC.
[url]http://www ... -
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, ... -
PC power source and Spectrums.I'm planning to use a basic PC ATX power source (300W) for all my sinclair equipment, but I have two questions: - I've read about some nasty things …
... 7805 or use another voltage regulator to get +9v? A 7809 ... be enough, so what other regulator?
- And (not related ... -
Mb02+ideAs I wrote in the hardware forum there will be a small number of a redesigned MB02+IDE (nearly the original MB02+ including IDE interface also for CF…
... /> optional: implementing of a 5V regulator to use eventually the same ... -
Spectrum 48K colour problemI obtained Spectrum 48K issue 2 in verry good condition. Machine work very good, but picture on my Samsung TV (72cm diagonal flat 100 Hz) is little s…
... cant remember if there some regulator on it, who can bring ... -
+3 PSU PoorlyI have a +3 that just stopped working. Its the psu thats gone and opening it up discovered a blown fuse. After replacing the fuse it still doesnt wor…
... it. Looks like a voltage regulator. Has anyone got one of ... -
R.I.P. spectrum 48kRecently one of my 48k rubber key (issue 4) machine bit the dust the other day when I tried to power it on. When powering it on, it gave a weird 'bee…
... check of voltages, new voltage regulator, new membrane... Also added a ... /website on a better voltage regulator that can be used instead ... to add an additional voltage regulator in case one fails (have ... -
Problem SpeccyNot sure anyone can help without a photo but I'll describe it anyway (and maybe post a photo later). I have a problem speccy. The display shows a bo…
Faulty 128 toastrackHello, I hope someone of the hardware gurus can point me in the right direction for fault finding. My speccy crashes often (sometimes after a short,…
... (apart from changing keymat, voltage regulator, applying the video fix or ...What's this hardware?[URL="http://www2.snapfish.com/slideshow/AlbumID=1351742020/PictureID=39192676020/a=1759991020_1759991020/otsc=SHR/otsi=SPIClink/COBRAND_NAME=snapfis…
... 7805 and a 7812 voltage regulator, so the power will be ...Repair options for my own dear old Spectrum 48k?Hello all, This is my first post to this wonderful forum, which is part of a truly great website! My name is Arnold, and I live in Utrecht, The Nethe…
... : I have measured the 7805 regulator, its upper pin is 4 ...
