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+12v/-12v/9v and peripherals?Do any peripherals use the +12v, -12v or 9v lines exposed at the edge connector? Firstly, if they use +9v they won't work on a +3, since the +3 does…
Do any peripherals use the +12v, -12v or 9v lines exposed at ... traces down to pass the +12v/-12v through, so I'm looking ... -
12V -> 9VI found this simple dc-dc converter: [url]http://www.mcrent.com/workbench/dcdc1216/[/url] it converts 12V to 16V, can it be used to produce 9V by mod…
I found this simple dc-dc converter:
[url]http://www.mcrent.com/workbench/dcdc1216/[/url]
it converts 12V to 16V, can it be used to produce 9V by modifying R1 and R2?
is there some better solution? -
Spectrum +2 grey 12v railHello everyone, I have this grey +2 with no video from tv. After much reading and testing i realized it was the internal power supply. At the 12v ra…
... internal power supply. At the 12v rail to tea2000 and serial ... -
12v in a Spectrum +2My Speccy 128 +2 requires a 9v 2.1a PSU, all my 9v PSU's are much below 2.1 amps :( I do however have a 12v 2amp PSU, if I reverse the polarity so t…
... /> I do however have a 12v 2amp PSU, if I reverse ... -
12V Rail - Spectrum 48kOkay - I may just be having a senior moment here, but I'm running out of ideas. I'm working on a Spectrum Issue 4S board,and have had to remove al…
... -5V are fine, but the 12V rail is at almost 25V ... , and the rail there was 12V as expected.
Has ... -
12V ripple with lower ram installedI repaired a speccy this week. Before doing anything I replaced all caps and measured the transistors in the power section. When doing this I found t…
... on and measured the voltages, 12v was giving me an extreme ... on with the ram removed. 12V line was fine with a ... the picture. Looked at the 12v line and there is a ... lower ram ic's the 12v line is ok but when ... causing the instability in the 12v line, it's ruining the ... -
ZX Spectrum Issue 2 - 12V badHey there, I'm currently attempting to fix a ZX Spectrum issue 2 that I recieved. Overall the machine was generally working when I recieved it, bu…
... vertical lines. Turned out the 12V line is bad (along with ... (eliminating the need for -5V/-12V) according to this http://www ... cathode of D15 and feed 12V with a second PSU. However ... D15 soldered in place, the 12V line gets ~8.4V-8 ... -
12V missing on an issue 3I’ve been working on an issue 3 Spectrum +. It shows thin distorted vertical stripes on bootup. +5 and -5V are all right but the 12V line measures ro…
... are all right but the 12V line measures roughly two volts ... the other place that uses 12V is the LM1889, which is ... -
zx spectrum +2A power supply missing -12v voltshey.. i'm looing at a zx spectrum +2A power supply that the -12v rail seems to be missing .. it has the 12 volts and 5 volts .. it is the version wit…
... +2A power supply that the -12v rail seems to be missing ... ok, i have changed the -12v regulator (79L12) no change then ... to the 5 volt and -12v rail ,,, confused.com
i ... realize that the -12v is not strictly required for ... -
Opus Discovery PSU[IMG]http://www.scotek.net/zx spectrum/opus.jpg[/IMG] This is a photo of my Opus Discovery transformer. Can anyone tell me what the connections are …
... .
Yellow must result in +12V DC at the end, so ... the windings will be 15-22V.
White must result in ... -
Opus Discovery PSU[IMG]http://www.scotek.net/zx spectrum/opus.jpg[/IMG] This is a photo of my Opus Discovery transformer. Can anyone tell me what the connections are …
... .
Yellow must result in +12V DC at the end, so ... the windings will be 15-22V.
White must result in ... -
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.…
I 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.
Thank you.
Best wishes,
Cristi -
TS2068 PSU?Just wondering what is the voltage and polarity that the TS2068 PSu has. My unit has no PSU, and I was expecting to either use my Spectrum 12V power …
... to either use my Spectrum 12V power brick or some multivoltage ... -
SDP: Floppy adaptors available to contributers !!!Hi folks, I've got a few more of those plus 3 adaptors that will allow you to read and write your 3" disks. The aim is to get you all motivated int…
... the cable because 5v and 12v are reversed on the +3 ... -
+3 Power Supplyg'day everybody. sorry to be asking for help in my first post (i know it's a tad rude), but how "generic" is the +3 power supply? does it supply mult…
... it just a standard 9/12V power pack? also, the connector ... -
Spectrum setY still have a ZX Spectrum (48k) (Europe) with a lot of accessories Cassettrecorder Interface 1, Microdrive Multiface 1 Kempston- Interface, Joysti…
+2A ProblemHi ! I just got a +2A and it has a powerup problem. When I turn it on it just displays 1987 1987 over the first few lines and a random attributes p…
... , two pins with +12V , one pin with -12V and the middle pin ... only has ONE pin with +12V, the other one is 0V ...3" floppy in pcI'm in need of some assistance. I have attached a 3" floppy to my pc using a cable as described at [url="http://newton.sunderland.ac.uk/~specfreak/F…
... floppy has the +5v and +12v wires switched), I have also ...Spectrum +2B on a PC PSUHello, Id like to attach my Spectrum +2B to a PC Power Supply. Im currently using an ATX power supply with my Amiga CD32. I searched on here for so…
... ) two +5V points, two +12V points, one -12V point and one Ground ... 5v line, and both +12V to the 12V line.. but, do I ... have to connect the -12V, and if so, how do ... this as there is no -12V on the molex connector?
Interface1 problem.I just bought one. Problem is, I plug the thingie in one of my argentinian clones and the machine seems not to run a single Z80 cycle. The screen is …
... a voltage inverter/doubler (for + - 12V).
Anyone knows some "IF1 ...+3 psu schematics and partsHi everyone. Does anyone have or knows where to get the +3 psu schematic? I'm trying to repair one but i cant find any info on the parts reference. …
... ).
The psu outputs 12V but not the 5V. As ...Help with a pc speaker problemI recently was given a 19" Hansol Mazellan 900p CRT Monitor which replaced my old Packard Bell smaller monitor. The speakers i have are fairly ancien…
... new monitor doesnt have a 12v output socket and i was ...Using a +3 power supply to power a CPC.Hi there, I'm going to try and power a CPC6128 using a +3 power supply. The +3 supplies 12V DC 0.2A and 5V DC 2A, the CPC6128 needs 12V DC 0.4A and …
... .
The +3 supplies 12V DC 0.2A and 5V ... DC 2A, the CPC6128 needs 12V DC 0.4A and 5V ... disk drives (which use the 12V line) are the same, aren ... connection between the 5V and 12V lines safer by adding a ...128k dead, no TV signalI got 128k spectrum (heatsink model) from a friend of mine. He told me that speccy is dead, and he doesn't know what's wrong with it. When I plugged…
... /> D19 -5V
MC1488N pin14 +12V
MC1489N pin1 0 ... (manual says it should be -12V?)
ULA is ...Problem with the plan of wiring of PSU ZX+3I found on the site the plan of wiring of the Power Supply of the ZX Spectrum+3, but I don't have the correspondence of the pins of card DIN with the…
... DIN with the tensions 12V, 5V and -12V, I am afraid to ...Cheap IPod Car Chargers.I brought an IPod in car charger from Hyper Value (Wales answer to pound stretcher) for £1.50 the other week. Well you get what you pay for, de…
... what you pay for, delivered 12v straight into the battery thus ...External power supply for SpectrumsWrong title. What I meant was 'Battery pack to use Speccy on the go'. I visited batterygeek.net, explained what I wanted to do with my spectrum, and…
... Capacity
9V~12V output
9V/12V selector switch
Tolerance ...+3 PsuHi all, Just been digging at the back of my wardrobe, and found a +3 PSU the 12V+ and the 12V- works but not the 5V+ has any one got a diagram for a …
Hi all,
Just been digging at the back of my wardrobe, and found a +3 PSU the 12V+ and the 12V- works but not the 5V+ has any one got a diagram for a +3 PSU please.
TIA+3 broken driveHi, I bought a +3 from E-bay, but the drive doesn't work :( I am not so familiar with Speccys, I know how to program them, but this is the first I'…
... is unlikely it is getting 12v.
Anyone got any ...Spectrum 128K - Needs Your HelpI have a Spectrum 128K (with the external heatsink on the RHS) it is a 1985 Version 6K mainboard, I got it out of the loft the other day and it wont …
... on anode of D19 and +12V on IC33 pin 14, nowhere ... can I find -12V (is this significant?)
The ...
