-
Character wobbleHello, I have an Issue 2 board which shows vertical character wobble. This happens for a few minutes followed by a few minutes of character sta…
... RAM) and also causing the 12V
line to rise to ... -
+3 PSU vs +2 PSUI'm referring here to the black +2's :) Now, a closer look shows the differences between the power supplies for these really is: "The 5V line is …
... rated at 2A, the +12V at 700mA (200mA for the ... +2A) and the -12V at 50mA."
... one:[i] Is this 'higher 12V capacity' simply because of the ... not need or require any 12V supply to it. The question ... d need a half decent 12V line if you were ... -
Sinclair 16k Ram pAck Issue3 schematicsHi guys, I am willing to repair a 16k ram pack for the ZX81 but I cannot find any schematic of the ISSUE 3 ram pack. I could only find a schematic…
... I am missing -5V and +12V. I would like to get ... -
DCP Interpacks - New Old Stock Still Available (Limited)!We rarely see New Old Stock of interfaces for ZX Spectrum appear - Never mind Still being on sale from the 1980's! https://dl.dropboxusercontent.c…
... wire terminals
• 3 x 12V Stepper motor outputs - screw wire ... -
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 remove the -5v and +12v rails from the speccy. The ... use upper pin 22/23 (12v DC / 12v AC).
I would ... guess i could fit a 12v version as well, and power ... -
Help request for an injured Issue 4A spectrumHi folks, I'm hoping to resurrect an issue 4A spectrum that has been in my hoard for a couple of decades since buying it for spares. Someone ha…
... and -5v are fine, the +12v is low (10.8V)
12v aside from lower ram was ... -
48k issue 4B display problem etchi,, i have a zx spectrum 48k issue 4B with a display issue it has wavy lines in both the border and paper,some colours seem worse than others ie red…
... error..checked resistors etc _5v,12v,5v all present ... anybody have ... -
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…
... its going to want a 12v supply as well as a ... -
5Ghz Video Transmitter - no more video cables.Just thought I'd mention... While waiting for my new LCD panels to arrive, I wanted to test the new Speccy that arrived, that wanting to test it, I r…
... mW, and consumes 50 mA @ 12v, so not too much load ... -
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…
... that's D15... In the 12v rail.
So I ... it in circuit. Check the 12v generating circuit... Needs a replacement ... , no problems, 5v rail stable, -12v and -5v also both present ... -
+2A PSU - power transistor substitute?I used a +2A PSU on a newly acquired Speccy for the first time in quite a while earlier, it was causing apparent issues in that starting the tape dec…
... by a brownout in the 12v line (Speccy itself was fine ... />
I saw - 12 and +12v which appeared stable unloaded, but ... was nothing - and now the 12v is off as well.
+3 RGB OutI've jus get an +3 that works fine, but i would like to use my CPC RGB monitor with it. Does anybody know something about if it's possible or not?. I…
I made a scart cable easily enough. Connect +12V to fast RGB blanking. I changed the 470ohm resistor on the composite sync line to 330 to make a certain tv work all the time. I've just completed a stereo modification on the secaria site.+3 RGB OutI've jus get an +3 that works fine, but i would like to use my CPC RGB monitor with it. Does anybody know something about if it's possible or not?. I…
Thanks for your kick response, but I don?t know where to connect the resistor and then +12V. Do you know the pin numbers to connect?+3 RGB OutI've jus get an +3 that works fine, but i would like to use my CPC RGB monitor with it. Does anybody know something about if it's possible or not?. I…
... pin 16. Connect it to +12V. Connect ground to 18 also ...Dead Speccy???I have a 48k+ speccy that boots up with rubbish! is it the z80 cpu? it still has the white boarder but the rest is a mess. any help would be nice..…
... presence of the -5V and +12V, that voltages are very important ...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 …
... blow the modulator (9 or 12V feeding) and the 5V regulator ...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 …
... case you don't have 12V AC in your speccy, so ...SPECCY+2 110V POWER SUPPLYI live in the USA and I bought a ZX Spectrum 128k +2 in eBay.com. The problem is that i don't know how to turn it on. All the major US appliances use…
... is rated at 2A, the +12V at 700mA (200mA for the ...RGB Cable for Spectrum 128K +2Anyone have one for sale? Or know where I could get one - tried the highstreet stores but no joy :?( Is it a special Sinclair version or can I use …
... pin 16. Connect it to +12V. Connect ground to 18 and ...RGB Cable for Spectrum 128K +2Anyone have one for sale? Or know where I could get one - tried the highstreet stores but no joy :?( Is it a special Sinclair version or can I use …
I discovered a further enhancement to scart cables. If you want the AV mode of the tv automatically selected when the computer is on connect +12V to 8 on the scart socket.What are the differences between the +2 and the +2A ?I only acquired a +2 for the first time in my life a few months ago. It works fine. :) I even managed to tracke down nearly all the wargames by the s…
... voltages adjusted to 5V, +12V and -12V. No other spectrum has rgb ...Can somebody help me with this?One of my "friends" shoved a piece of metal into the back of my spectrum (48k RAM) and now whenever I try to use it theres nothing but weird lines an…
... the first 16K RAM bank (+12V & -5V).
If this ...what are exact current values on +2A's PSUI like to know what is written on an original +2A PSU nearby each voltage. I mean the current for +5V, the current for +12V and the current for -12V.…
+5V 2A
+12V 200mA
-5V 50mA
The +12V and -5V probably have not got much power to spare.
Fraser.what are exact current values on +2A's PSUI like to know what is written on an original +2A PSU nearby each voltage. I mean the current for +5V, the current for +12V and the current for -12V.…
... wrote:
+5V 2A
+12V 200mA
-5V 50mA[/quote ...
+5V 2A
+12V 700mA
-12V 50 mA
As ... far as I know the -12V is required for the RS232C ...My Spectrum is buggeredThe picture on my 128 is flickering like crazy, it's not something I would be able to fix. Sometimes the signal goes completely, though the machine n…
... seen generally relate to the +12v supply to the encoder IC ...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…
... connected my 128K to a 12V wire of a PC Power ...Spectrum LpatopSo I'm sitting at work board as normal I've already played klass of 99 3 days today and have nothing left to do. So after setting up 5 laptops today…
... my IBM ThinkPad uses a 12V batter at 2.6A you ...Fitting 3.5" floppy as +3 Drive B:Anyone done this? I see the cabling differences as talked about on the same page as the sound correction schematics, but thought I'd see whether anyo…
... mentions that the +5v and +12v connections are reversed?
