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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…
... caps as well as the 7805 regulator and some times the ztx650 ... ZX machines used the same 7805 voltage regulator but totally by accident I ... uses an 78S05 regulator which is a 2A regulator. That got ... guide...
"78S05 2A regulator can be used, but hardly ... -
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…
... of 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 …
... odd reason ripped off the Voltage Regulator and heatsink. Is there anything ... -
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…
... to me with the voltage regulator hanging around,
... the three pins from the voltage regulator tear off.
voltage regulator was soldered.
The voltage regulator has printed "F M0247 MC7805C ... -
New to Spectrum -- Is my 7805 bad?So I just got my first ZX Spectrum (I have TS-1000 and a ZX81). Anyway, first thing I did was watch this video from JoulesperCoulomb on first tes…
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Well, it seems my 7805 voltage regulator is only showing 1.2 ... other device that uses a 7805 (well, one other device with ... /> So, more than likely the 7805 is dead right? I haven ... -
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…
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It acts as a voltage regulator undoubtedly but I am wondering ... -
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…
... ? I should imagine that the 7805 voltage regulator and [drink spill induced] keyboard ... -
Repairing a Disciple disk interface - info for othersJust posted this [URL="www.benophetinternet.nl/hobby"]on my weblog[/URL], but I think it's also interesting to put here. This week I did some work o…
... seemed fine, except for the 7805 voltage regulator on the Disciple, which is ... .
I replaced the 7805, but it still get's ... replacing the cpacitor at the 7805.
Hope that will solve ... -
Spectrum+ refurbished by a noob!Sorry if I'm slightly spamming the forum with threads about my Spectrum+, but this is the last one (for now!) as it is all fixed up and I just wanted…
... [/url]].
5. Replaced the 7805 Voltage Regulator with a better one (followed ... .uk/2014/11/zx-spectrum-voltage-regulator.html"]here[/url]).
6 ... -
128K Toastrack (Noisy video output)Hello there guys! Need all of yours guides and advices. Some time ago I bought a nice looking 128K from eBay (motherboard v6K) and put it aside for…
... capacitors with a new ones, 7805 voltage regulator, TR4 and TR5 transistors.
Will Spectrum run @ 60Hz?Sorry to overlap w/ my other recent post, but want to know, if I grab a Spectrum and use it in America with a voltage converter or a different power …
... more power dissipation in the voltage regulator then...
[/quote]
voltage delivered to the regulator on the ... />
The 7805 voltage regulator used inside the Spectrum to ... minor ripple, mains voltage variation things matter little ...New member, dead SpeccyHallo everyone, I was directed here from a Commodore (boo, hiss) forum after pleas of aid with my newly acquired, quite dead 128k Speccy. I sincerely…
... and found out that the 7805 voltage regulator on the cooling fringe was ...PC CPU heatsink and fans to cool down Speccy!Ah ha! I've just had an idea! taking apart some scrap PCs I decided to take the CPU heatsink and fan units off and see if I can attach them to the …
... generator inside it is the 7805 voltage regulator; so I think that by ... lowering the voltage from 9V to 7,2V ...Dead Spectrum +Hi all, I've recently dug out my old Spectrum + with the idea of repairing it. When I last looked at it, when I was much younger, I was soldering a …
... 're getting 5v off the 7805 voltage regulator.
You can find ... /datasheets_pdf/7/8/0/5/7805.shtml[/url]
Then ...toasted soeccysHello, ive jsut bought a pair of speccys on ebay (one 16k issue 2 & a prob 48k issue 3) unfortunaly the genius who sold them tried to see if the wor…
... previous owner only fried the 7805 which will be easy enough ... on screen is because the 7805 is no longer supplying enough ... 1v over the nominal supply voltage).
Anyway, on ... 're getting 5v off the 7805 voltage regulator.
You can find ...toasted soeccysHello, ive jsut bought a pair of speccys on ebay (one 16k issue 2 & a prob 48k issue 3) unfortunaly the genius who sold them tried to see if the wor…
... here - such as the input voltage will always beDead +2B, help required...It was bought defective on ebay. It came with two faults: a "dead" power supply (it was the fuse) and a faulty main unit. The power supply is now re…
... Spectrum (well, apart from the 7805 voltage regulator) that gets measurably above ambient ...On a 48K issue 6A......how can i isolate the 32K block? I want to test if there is any fault on the 4116's , leaving the 4532's out of the equation. Will removing the …
... +5v is supplied by the 7805 voltage regulator, the rest by a small ...On a 48K issue 6A......how can i isolate the 32K block? I want to test if there is any fault on the 4116's , leaving the 4532's out of the equation. Will removing the …
... +5v is supplied by the 7805 voltage regulator, the rest by a small ... 9: 4.98v
7805:
Input: 12.20v ...Of soldering and whatnot.So. It looks like if I'm going to have any sort of active retrogaming habit in the future, I need to learn a bit more about the nuts and bolts. Emula…
... 555 timer ICs.
- A 7805 voltage regulator, and simple wall wart power ... around the house already). The 7805 will give you the 5 ...BETA-DISC (TR-DOS) support in ZX emulatorsBETADISC 128 is original device designed for external use with ZX Spectrum 128/+2(grey). Russians ZX clones (Pentagon, Scorpion, ZX profi, Quorum, ZX…
... BUS. Betadisk interfaces have own 7805 voltage regulator and some versions needs +12V ...Issue 2 voltage troubleDear all, I got my hands on an old issue 2 from a friend. Price was close to zero so I did not hesitate to take it. After powering it up I was sur…
I would start by replacing the 7805 voltage regulator.Another cause for DivIDE problems on 48K'sThe last months some topics were opened to discuss problems with 48K ZX Spectrums and DivIDE. Sofar we found: - Bad Z80's because of poor fanout (si…
... interface has it's own 7805, and consumes about the same ... disk drive interfaces use a 7805 voltage regulator, I have a non-original ...PlusD mini - production startedI'm developing a PlusD clone, with some features stripped to make it very affordable. The real PlusD and German clone have an 7805 regulator, but I …
Spot the 7805 voltage regulator...
[URL="http://www. ...PlusD mini - production startedI'm developing a PlusD clone, with some features stripped to make it very affordable. The real PlusD and German clone have an 7805 regulator, but I …
[QUOTE=1024MAK;671145]Spot the 7805 voltage regulator...
[URL="http://www. ...The Disciple clone... doable?Hi. As a spectrum user in the 80's this was the dream interface all-in-one for me. I have a 48k+ and planning on get a 128K toast-rack later. Anyway…
... and puts it through a 7805 voltage regulator. This is (or at least ...The Disciple clone... doable?Hi. As a spectrum user in the 80's this was the dream interface all-in-one for me. I have a 48k+ and planning on get a 128K toast-rack later. Anyway…
... and puts it through a 7805 voltage regulator. This is (or at least ...48k + Spectrum Issue 4S Display IssueHi all! Brand new user here. Growing up I had a zx spectrum for a little bit, and recently I have bought a working 48k + Spectrum (Issue 4). I was…
... have only tested the regulator and that spits out ... + and -5.[/QUOTE]The 7805 voltage regulator only produces the +5V supply ... attached to the 7805 regulator) as the regulator metal tab is ... connected to ground / 0V.
The voltage ...48k + Spectrum Issue 4S Display IssueHi all! Brand new user here. Growing up I had a zx spectrum for a little bit, and recently I have bought a working 48k + Spectrum (Issue 4). I was…
... 5V rail directly from the 7805 voltage regulator. If it's low or ... a faulty 7805, but for it to have a negative voltage is ...48k + Spectrum Issue 4S Display IssueHi all! Brand new user here. Growing up I had a zx spectrum for a little bit, and recently I have bought a working 48k + Spectrum (Issue 4). I was…
... 5V rail directly from the 7805 voltage regulator. If it's low or ... a faulty 7805, but for it to have a negative voltage is ...
