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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…
I am hoping to replace the 7805 regulator in my issue 3 ... exactly what to buy to replace it with (my father in ... to a supplier for a 7805 that requires no heatsink, but ... -
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…
... to replace the electrolytic caps as well as the 7805 regulator and ... ZX machines used the same 7805 voltage regulator but totally by ... -
Spectrum Emulator for Win XP to replace ZX32After years of non-updates, I've decided to finally replace ZX32 as my Speccy emulator of choice for a new one.. What can people recommend thats fre…
... , I've decided to finally replace ZX32 as my Speccy emulator ... -
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…
... would be doing. I might replace components, just to get the ... details: I have measured the 7805 regulator, its upper pin is ... you recommend me to do: replace the entire PCB (at the ... -
how to replace the drive belt on a +3hello all i'm so annoyed with myself, I found an excellent web page which led you through step by step on how to replace the drive belt on a +3. I …
... by step on how to replace the drive belt on a ... -
Second Hand SpectrumHi just joined the Forum. I have picked up a Spectrum at a s/h shop and would like some advice please. I have had two ZX81's packed away for severa…
... easy is it to repair/replace the ribbon?
When ... case was hot (by the 7805 reg) and also the power ... -
7805 cooler replacement?I have been looking into finding some replacement for the 7805, since that single component generate a lot of heat. Been looking at switching alterna…
... finding some replacement for the 7805, since that single component generate ... -
7805 on PlusD needed?I am planning a batch of PlusD interfaces. As I do not have a board design file (for e.g. Eagle), I am redesiging the PlusD schematic in Eagle myself…
... wondering: is the voltage regulator (7805) on the PlusD really necessary ... -
7805 Regulator to RECOM modI really need to get shot of some of the 7805 regulators in some of my Spectrums. Latent heat is affecting keyboard membranes etc. As I am not a ha…
... shot of some of the 7805 regulators in some of my ... " the same way as the 7805 does
[*]Do I require ... -
BC307C to replace ZTX213Can BC307C be used to replace ZTX213? I only found some vague confirmation.
Can BC307C be used to replace ZTX213? I only found some vague confirmation. -
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/…
... &Ntk=gensearch&Ntt=7805+regulator&Ntx=mode+matchallpartial ... &Ntk=gensearch&Ntt=7805+regulator&Ntx=mode+matchallpartial ... -
48k - Why Won't it Buzzzz?Hi WOS ;) I bought a load of Spectrum games off eBay and thrown in for good measure was a 48k 1984 Issue 6a circuit board that I was told was for sp…
... took some voltages around the 7805 regulator and the positive end ... for what to test or replace. Any suggestions?
Thanks ... -
How to replace broken images on Infoseek ?Would it be possible searching infoseek from a search box within the forums just as in the old WoS ? This way you may have the user navigate within …
... /questions/92720/jquery-javascript-to-replace-broken-images
http://stackoverflow ... -
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 ... other device that uses a 7805 (well, one other device with ... /> So, more than likely the 7805 is dead right? I haven ... -
Faulty Issue 1Hi all, thought I'd document my efforts in getting another speccy working. I've never done this before so please bear with me... I recently took a p…
... - initial power on reveals duff 7805 and the left-most lower ... 's supply legs, and replace the 7805 with a Traco Power DC ... my -5V is missing. I replace TR4 and TR5 with their ... -
Acer Aspire 5920G Graphics card - Replace or have fixed?Wondered if you fellow Spec-chums might be able to help me with getting the most cost-effective fix for a Acer Aspire 5920G laptop I've got my mucky …
... repair service(re-balled and replace chip-set) on these cards ... -
48k Issue 6a Very sick indeed.Hi Guys. I have a 48k Issue 6a board that shows a white screen with grey border. The white screen has three black squares spaced equally on the le…
... I have fitted a new 7805 regulator, socketed lower and upper ... coil I will remove and replace making good any issues I ... -
uMIA / Replace TAP Fireflash - Abacus[b]Title:[/b] Fireflash (Variation 1) [b]Year:[/b] 1983 [b]Company:[/b] Abacus [b]Author(s):[/b] Kevin Flynn [b]Type:[/b] Game [b]Message Langua…
... ]Reason for Upload:[/b] To replace TAP file on WOS with ... -
Fixing a poorly Issue 3 - Odd faults.Here's one for you Spectrum fixers, I warn you it's a long one. I've spent a couple hours this evening doing several repairs on a rubber keyed Speccy…
... for voltages I discovered the 7805 had the 5v missing on ... plan of action was to replace the 7805, all electrolytic capacitors with ... -
LM317T modern replacementQuick question to everyone, I am back to modding my opus discovery 1 and looking at the LM371T regulators and wondering if there is a modern equival…
... there is for the 7805 that i could replace both on board ... -
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…
... we are planning to replace this with a Traco ... confirm what variant of 7805/78S05 regulators are in ... Power TSR 2-2450 to replace its legacy regulator, or ... entire heatsink assembly and replace it with the same ... would be needed to replace TR8 on the +2 ... -
Modifying a speccy to +5v only operation.Just a thought experiment so far. Let's say i wanted to make a more resilient spectrum by getting rid of the DC-DC converter circuit. This would remo…
... is easy to get around. Replace the 4116s with 4164s or ... would fit a Traco 5v 7805 switch mode replacement, i guess ... -
Using a thermal camera to fix speccy's.Hi All, Thought I'd share another repair... Got a board that collapsed the bench supply straight away ( I run a bench supply and give it just enou…
... a 5V test on the 7805, and it's at nearly ... previous replacement. Remove it, and replace with a small regulator PCB ... can't find any spare 7805's, set for 4.95v ... -
Whats wrong with my 128k?The little power converter (the thing with three legs) that sits on the cooling fin was broken, so I bought a new power converter and replaced it. Bu…
... Voltage Regulator you bough (7805), was it a 1A type ... more expansions. I can replace it with a 10A ( ... correctly. Generally I say, 7805 with 1Amp or more is ... 't try it with 7805 that have plastic heat ... chance that the damaged 7805 damaged other components in ... -
Want a Speccy Repaired?Maybe it's time to put my 'skills' to use.... Now that I've sourced some of the nastier transistors, I've fixed about 6 rubber keyed Speccys in the …
... power supply failure or the 7805 regulator has gone kaplowie or ... "]iang@stnet.org[/email] except replace the "st" with "amiga" :) "Amiganet ... -
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…
... 's that go wrong, the 7805 being a very reliable device ... I've ever had to replace more than 5 of them ... -
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…
... the 7805 which will be easy enough to desolder and replace (and ... on screen is because the 7805 is no longer supplying enough ... 're getting 5v off the 7805 voltage regulator.
You ... /datasheets_pdf/7/8/0/5/7805.shtml[/url]
Then ... -
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…
... doesn't look like a 7805 reg. Are you sure it ... [/url]
I always replace them with the ZTX650 regardless ... escape.
Replace TIPP31 with ZTX650, and replace ZTX213 with ZTX750 ... br />
Easy to just replace with a 650/750 combination ... -
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…
... that runs entirely off the 7805 regulator. All the other digital ... single 5v supply off the 7805 too. (I've not looked ... probably quick and easy to replace them (check the schematics for ... your board). Replace any electrolytics that are in ... -
48K Speccy not workingHey, A few months ago (hope it´s not to late) I was loading a game into my speccy and from one moment to another it stopped working! I unplugge…
... .tkk.fi/Misc/Electronics/circuits/7805.gif[/url]
We need ... following:
1. 7805 is dead => replace it.
2. One ... only pin 3 of the 7805, powering it up (connecting the ... +5V appears on it, then 7805 is good and one of ...
