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IDEA: ZX Spectrum dock.[LIST] [/LIST]The ZX Spectrum dock Inspired by my foray into RGB/SCART cables and my XPS 12 dock: [IMG]http://i.dell.com/sites/imagecontent/product…
... reducing the work of the 7805, so heat inside the Spectrum ... -
Screen artifacts/shimmer after composite modHi folks,<br><br>I've done a little work to what I hope is going to be my work-horse rubber key speccy - It's a Samsung made issue 3b.<br><br>I notic…
... installed one of those traco 7805 replacements.
Anybody have ... -
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 ... -
Display bandsHi all, I'm busy working on an issue 3 16k Spectrum I picked up on eBay. I've upped it to 48k and put a new membrane in. I noticed the display was…
... difference. Finally I replaced the 7805, no difference.
The ... -
Issue 1 schematics?I'm fault-finding an issue 1 board. So far I've found a hot memory chip and snipped it's supply legs, then swapped the burnt-out 7805 for a switched…
... , then swapped the burnt-out 7805 for a switched regulator. Now ... -
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 ... supply legs, and replace the 7805 with a Traco Power DC ... -
Dead issue 3b with black and white barsHi all, I've been donated an issue 3b which has some nice black and white bars with a few flashing blocks. I've done a few RAM tests and could spo…
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The voltage from the 7805 seems fine. Possibly CPU or ... -
Issue 6a - no soundHi all I get from ebay one issue 6a, Burned 7805, ztx 650 After this all look fine, zx diagnostic board pass mem test but not have sound, i change…
... one issue 6a,
Burned 7805, ztx 650
After this ... -
128k toastrack helpHello everyone So. I just bought a toastrack 128k. No show when plugging into TV. The PSU is fine and tested with a multimeter. Chips are not gett…
... in. However. Seems that the 7805 is so hot I cannot ... . So is it likely the 7805 is dead? I cannot find ... -
Bizarre ZX Spectrum faults (also possibly relevant to Spectranet compatibility problems).I'm attempting to repair an issue 4A 48K ZX Spectrum and am encountering some very strange problems. For my own records I've given this computer the …
... the electrolytic capacitors and the 7805 (the original had some broken ... -
Issue 3B turning offI'm trying to save a Spectrum Issue 3B. I restored the power supply section, changing the 7805, TR4, and TR5, besides all electrolytic capacitors. No…
... power supply section, changing the 7805, TR4, and TR5, besides all ... -
Where could I buy a B1367Y transistor in the UK?I'm after a B1367Y transistor, must be T-220 package type that can be mounted to a heatsink. Anybody know where I can buy them in the UK? Tried Googl…
... owner and they have fitted 7805 5V voltage regulator in instead ... . Still I can save the 7805 as it's used in ... -
48K Issue 6a wobbly and flickering TV outputHi folks, Found an untested issue 6A Spec whilst tidying up and it had a warranty sticker on it from a past repair which seemed to be a socketed L…
... I can I swapped the 7805 for a switching regulator (Tracopower ... -
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 ... -
Frying a 48K ZX Spectrum (revision 4A) with 10 V instead of 5 VHello I got a used zx spectrum. When I opened it up, there was no 5 V positive voltage regulator at the 10 V power inlet. Instead what would be in…
... input and output of a 7805 or similar were short cut ... -
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 ... -
48k packed up after cap changeHi all, I'm relatively new to the Sinclair world, my 8-bit repairs in past was lurking in the dark sides of Acorn, Amstrad and Commodore! I've got…
... changed them, fitted a new 7805, 100µF composite mod and ... -
Restoring AY registersAfter doing (not still finished) the sna to tap converter, I'm going to try to do the same for 128k snapshots. I've got threee ideas about what to do…
... an interesting routine at address 7805: an out (c),a followed ... -
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 ... action was to replace the 7805, all electrolytic capacitors with new ... -
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…
... like there is for the 7805 that i could replace both ... -
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…
... please confirm what variant of 7805/78S05 regulators are in the ... -
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…
... would fit a Traco 5v 7805 switch mode replacement, i guess ... -
ZX Spectrum 48K Issue 4B No soundHi, I have a ZX Spectrum 48K Issue 4B without sound. I tested the ULA on another Spectrum and works fine, tested the speaker and it has the correct …
... 's connected to Input of 7805.
I don't know ... -
General PSU repair guidesNot Speccy related. I'm just looking for a guide as such as to where to begin with a power supply repair. Realise this is a bit of an odd thing to as…
... two and something like a 7805/7812 etc regulator, aside from ... -
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 ... can't find any spare 7805's, set for 4.95v ... -
Building a ZX Spectrum and I have some voltage questionsI've posted about this before looking for parts, but now I've found all the hard-to-get stuff (thank you Retrolium!). So I figured new questions, new…
... more robust version of the 7805 than was used in the ... -
blew up my 128i did it - damn. i accidentally reverted the polarity of the power power supply, so ended up with a blown 5v stabilizer, which i replaced, but there …
... the regulated 5V, and the 7805 regulator got blown first - i ... -
blew up my 128i did it - damn. i accidentally reverted the polarity of the power power supply, so ended up with a blown 5v stabilizer, which i replaced, but there …
... polarity this destroy the regulator (7805) but pobably don't cause ... -
ObituaryYesterday my spectrum died :( Over 7 years of faithful service its finally gone to Silicon heaven. Rest in peace spectrum 48k+ Born sometime in 198…
... be down - there is a 7805 regulator in there which converts ... -
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…
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(*) = 8624 LM 340 T5 7805
################ = shape of thin ... of 8624 LM 340 T5 7805
Connected above print / under ...
