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eBay 128K Spectrum RGB cables overheat the Spectrum!?Hi everybody, For a long time I've wondered why Spectrum 128K Toastracks were overheating when using my Retro Computer Shack RGB SCART cable. Today …
... an external 12V power supply may be connected. If the power supply is not ... input. If a 12V supply is connected then it will ... br />
Using an external power supply is the approach I recommend ... be buffered through an external circuit and then all issues of ... -
Some problems with 2 ZX Specturm board'sHi, last week i got some ZX Spectrum stuff. Also 2 ZX Spectrum 48K's, one in the orginal case the anoter one in a DK'tronixs case. Both have problem'…
... Pin 7 is not a power supply pin.
Do you ... 1, then the internal power circuitry in the Spectrum ... If you press reset for 2 seconds and then let ... />
Check the power lead, plug and the Spectrum ... 's power socket (including looking for ... -
Spectrum Missing -5vMy Spectrum is "almost" booting, just when you expect the (C) 1982 Sinclair Research to appear it just displays flashing squares on the screen :( I …
... problem with the internal power supply circuitry in the Spectrum. ... without the important -5V supply. If they are not ... sure that the +12V supply is okay?
What ... issue 3B) is short circuit, or one of the ... 4116 RAM chips is short circuit.
EDIT: ... -
Clashbasher a new interface to reduce colour clashI've been working on this for a while now. [IMG]http://markamy.uwclub.net/cauldron.JPG[/IMG] Basicly its an add on for a 48k spectrum, which reinte…
... any ground bounce issues or power supply issues not being able to ... have solid ground/power planes everywhere around that chip ... of thing. I've used 2 layer home made boards with ... -
Toasted +3Oops.. I shorted one of my +3 (being clumsy with multimeter, doh) when measuring PSU connector pins :D Any immediate guesses what exactly died on thi…
... *anything* with *anything* on the power supply lines, actually means that you ... 3 (or any other digital circuit) working and feeding it +12V ... also take it, the short-circuit was brief, perhaps even momentary ... works, then it's the power supply that got killed, so ... -
Toasted +3Oops.. I shorted one of my +3 (being clumsy with multimeter, doh) when measuring PSU connector pins :D Any immediate guesses what exactly died on thi…
... *anything* with *anything* on the power supply lines, actually means that you ... +3 (or any other digital circuit) working and feeding it +12V ... across them if the 5v supply remained at 5 volts above ... certainly can't produce enough power to do that by shorting ... -
Toasted +3Oops.. I shorted one of my +3 (being clumsy with multimeter, doh) when measuring PSU connector pins :D Any immediate guesses what exactly died on thi…
... between the power supply and the short circuit) for any given circuit.
power supply. All the power supply voltages on a ... not possible with that power supply to do this. In ... internal resistance of the power supply (transformer windings and voltage ... -
Toasted +3Oops.. I shorted one of my +3 (being clumsy with multimeter, doh) when measuring PSU connector pins :D Any immediate guesses what exactly died on thi…
... know what kind of power supply Spiv was using. He ... other. However, in a circuit being "fed" 5V through ... , 12V from the same power supply that provides the 5V, ... br /> If you short-circuit the computer's ground ... point of the short-circuit. The only thing that ... -
Toasted +3Oops.. I shorted one of my +3 (being clumsy with multimeter, doh) when measuring PSU connector pins :D Any immediate guesses what exactly died on thi…
... ;740307]
If you short-circuit the computer's ground plane ... the design of the +3 power supply and +3 PCB. It's ... with the design of that power supply (and any "ground bounce" you ... -
Toasted +3Oops.. I shorted one of my +3 (being clumsy with multimeter, doh) when measuring PSU connector pins :D Any immediate guesses what exactly died on thi…
... equate to zero potential. The power supply voltages of +5 and ... basically creating a brief short circuit. Additionally, they must overcome ...
Similarly, a short circuit can briefly pull ground "up ... area around the short circuit (especially given its slow ... -
Spectrum +2A PSUI picked up a black +2A without a power supply. Looking on eBay the PSUs seem quite rare. The schematics for the PSU show +/-12 and 5v, would it be …
... (sticker or manual).
2. I would suggest a DPST ... permanently grounded. All modern ATX power supplies are still on, ... grounded and they're providing power through the +5VSB line ... course, an old-style AT power supply would be even better.
Spectrum +2A PSUI picked up a black +2A without a power supply. Looking on eBay the PSUs seem quite rare. The schematics for the PSU show +/-12 and 5v, would it be …
... br /> [QUOTE=skagon;740681]
2. I would suggest a DPST ... grounded. All modern ATX power supplies are still on, ... and they're providing power through the +5VSB line ... an old-style AT power supply would be even better.< ... to build a bench supply at some point and ...Toasted +3Oops.. I shorted one of my +3 (being clumsy with multimeter, doh) when measuring PSU connector pins :D Any immediate guesses what exactly died on thi…
... advice of "do not short circuit anything" is good. No ... be damaging depending on the circuit.
What is ... inadvertently creating a switch mode power supply while creating the short ( ... unlikely especially given the remaining circuit isn't designed to ...IF1bis StabilityI just thought I would start a different thread relating to the IF1bis, and leave the copyrighters to it elsewhere...:-P I've had mine for a few mon…
... here, and highlight:
[QUOTE]2.4 It has been observed ... the 9V supply[/B] into/from
the Spectrum?s power socket ... to plug the Spectrum?s power supply into a
switch mains ... pressing the
button for 2.5 seconds. [/QUOTE]
My ...Amstrad FD-1 Disc DrivesA quick question: With the Amstrad FD-1 external disc drives, I've seen DDI-1 interface cards mentioned. Are the DDI-1 interfaces just for the Amstr…
... pins on the +3 - pin 2, 4, 6, and 10 (because ... short the FD-1's power supply to the +3's ground ...Any other members in Canada?Hi all, I'm from Scotland, but been in Canada a while now, and looking to see if there are other members in the Great White North, maybe to trade wi…
... , I donated all my equipment (+2, +3, suitcase full of games ... currently have a + and a +2.
also got a DivIDE ... ago.
I have a power supply I picked up locally that ...+3 upgrades?Hi this is my first post on becoming a member of this forum and I'm hopeful and excited about some of the hardware I have found. Hi I found my old …
... 're still after a power supply for a grey +2, there's one ... .uk/itm/Sinclair-ZX-spectrum-2-Power-Pack-Grey-Genuine-and-Original ...Wanted spectrum +2 or 128kLooking for a speccy 128+2 or standard 128 needs to be working, my last 2 have died at different times over the past yaer or so and i really need one…
... ]Looking for a speccy 128+2 or standard 128
needs ... to be working, my last 2 have died at different times ... plus 2 if you are interested. No rf lead or power supply but ...Wanted spectrum +2 or 128kLooking for a speccy 128+2 or standard 128 needs to be working, my last 2 have died at different times over the past yaer or so and i really need one…
... plus 2 if you are interested. No rf lead or power supply but ... one of those multi adapter power supplies or does it have ...Pentagon floating bus timingI wanted to take a little break from working on the ZXDS UI yesterday, so I added support for Pentagon timing instead, so I can finally enjoy the lik…
... very minor adjustments to the power supply).
With a little luck ... them on my Pentagon 1024SL 2.2 as well.Grey +2 DiedHi all, Thrashing my +2 playing Mugsy last night and it did this... [URL="https://m.flickr.com/photos/83515822@N05/13012551693/lightbox/"]https://m…
... of my +2 machines (one with a dodgy power supply which had to ...Shopping on AliExpress - is it safe?Hi guys i would like to hear if any of you have made any purchases on this site: [url]http://www.aliexpress.com/[/url] ? The reason i ask is that i …
... Logic Probe as a 98.2% positive feedback, so that should ... battery inside it.
- Any power supply (except those bundled with other ... . I had a 1.5A power supply, and it couldn't even ... 700mA device. Note that those power supplies bundled with other devices ...Another "untested" dead spectrum...Hi, I'm looking for some suggestions on a faulty Spectrum I have picked up. I'll need to wait until tomorrow before posting pics, but the screen is …
... ICs or failure of their power supply or both.
Check ... circuit fails because of a bad capacitor. Check none of the power supply ... lines are shorted to 0V. Power on and check all 3 supply ...Another "untested" dead spectrum...Hi, I'm looking for some suggestions on a faulty Spectrum I have picked up. I'll need to wait until tomorrow before posting pics, but the screen is …
... machine when I saw "Issue 2 board" mentioned, but yeah, could ... number 1 - check the switcher power supply based around the ZTX650 first ...Another "untested" dead spectrum...Hi, I'm looking for some suggestions on a faulty Spectrum I have picked up. I'll need to wait until tomorrow before posting pics, but the screen is …
... the lower RAM and its power supply would be an upper RAM ... problem (it's repair number 2 or 3).Spectrum Not Responding to Keyboard InputHello, sorry if this thread is not in the correct place, This is my first post and I'm not sure where to post this type of thread. :lol: Anyway, I r…
... .) The replacement Power Supply is an official Sinclair model UK1400 power supply unit which ... />
- It is an Issue 2 spectrum
- The text ...Beta Disk MicroP 3.5 Disk Drive DIN Connectors signalsHello, I own a Beta Disk with an 3,5" Disk Drive from MP (MicroP) which has two DIN Connectors. One is a DIN Connector with 5 Pins, the other a DI…
... found an Micro-P Floppy Power Supply for QL on ebay:
power-circuit may reduce this to the ...Harlequin clone...PCB manufactured!Using Chris Smith's detailed schematics and project notes from the Harlequin... a Speccy fan in the United States by the name of Don (Superfo) has de…
... unregulated power supply, which in practice tends to be higher (my +2 supply throws ...Please help identifying this Spectrum (I think) addonHello. I got this addon with bunch of ZX Spectrum stuff so I am assuming it is some kind of Spectrum (video) add on hardware. Could you please help …
... lot:
2 of this boxes, 2 universal power supply adaptors, 2 cables
my pc hardware problem needs helpYou might have heard of my PC problems by now, but I'm not a hardware person and I have no idea what the problem is. So perhaps someone here can help…
... =Black Hole;765255]A new power supply is far easier to test ... need to buy a cheap supply if I wanted to test ... this.
2) The computer is already 5 ...
