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Remove +12 Volt itemsWhich items can be removed on a ZX48K issue 4b PCB if I don't need the +12 Volt? Micky
[QUOTE=Valentin;439521]Speccy needs +12v for LM 1889 which is ... YPbPr converter.
Then, +12v are used by the first ... -
Remove +12 Volt itemsWhich items can be removed on a ZX48K issue 4b PCB if I don't need the +12 Volt? Micky
... negate the need for the 12v supply circuitry can possibly cause ... -
Remove +12 Volt itemsWhich items can be removed on a ZX48K issue 4b PCB if I don't need the +12 Volt? Micky
... negate the need for the 12v supply circuitry can possibly cause ... input is already around 11~12V if you're using the ... -
Remove +12 Volt itemsWhich items can be removed on a ZX48K issue 4b PCB if I don't need the +12 Volt? Micky
Alternative speccy power supplysI know all us would have our speccys with the original power supply,but often i would see a distress call from people who got speccy from ebay but on…
... three voltages (+12, +5 and -12v), and you'll have enough ...Electronics Help!I've brought a little universal amplifier from Maplins which is to go into the arcade machine I have, so power its speaker from the computers line ou…
... using regulated?. If unregulated, a 12V supply could easily have exceeded ...Electronics Help!I've brought a little universal amplifier from Maplins which is to go into the arcade machine I have, so power its speaker from the computers line ou…
... have tried it with the 12v psu in the photo, and ...Electronics Help!I've brought a little universal amplifier from Maplins which is to go into the arcade machine I have, so power its speaker from the computers line ou…
... have tried it with the 12v psu in the photo, and ...ZX 48K loudspeaker with 8 Ohm possible?Is it possible to change the loudspeaker from the ZX 48K with a model which has only 8 Ohm? Micky
... speaker on.
The coil resistance of a speaker, aka ...+3 ProblemsI have been having a few problems with my +3 and I am wondering if anyone can help or give me some advice: 1. I have 2 blank disks which I have save…
... your problem. You could feed 12v through the scart connector, as ...+3 ProblemsI have been having a few problems with my +3 and I am wondering if anyone can help or give me some advice: 1. I have 2 blank disks which I have save…
... says the problem is that +12V on +3 RGB connector are ...+3 ProblemsI have been having a few problems with my +3 and I am wondering if anyone can help or give me some advice: 1. I have 2 blank disks which I have save…
... switch signal, when you put +12V on it, it tells your ... +3 has 2 pins with +12V on it, both connected through ... , make cable that connects original +12V to SCART pin 8 (function ... 's suggestion, and check if +12V pin on the +3's ...damaged spectrum+ (blinking squares)Hi, Sorry for my poor english, but I couldn't find on family forums any remedy for my hardware problem with my first speccy in my life :) I've bought…
... 23A is not delivering -12V as the manual says, ... but +12V.
Quoting Dickens' hardware ... is therefore an unsmoothed +12V supply".
Dickens mentions ... real life somewhere around 12V,
B22,B23 ... is the generated +12V which often is a ...Some ROM/EPROM questions...I've got a ZX Spectrum +, a +2A and +3 computers, and I've been using +3e project ROMS for a while in my +3. I was thinking about using an EEPROM or…
... mentions 14V for erase, and 12V for programming - maybe there's ...Some ROM/EPROM questions...I've got a ZX Spectrum +, a +2A and +3 computers, and I've been using +3e project ROMS for a while in my +3. I was thinking about using an EEPROM or…
... Spectrum, so using +14v or +12v wouldn't be a problem ...+3 needs putting out of its misery[URL="http://cgi.ebay.co.uk/SINCLAIR-ZX-SPECTRUM-3-128K-FDD-GAMES-CLASSIC-VINTAGE-/270590074074?cmd=ViewItem&pt=UK_VintageComputing_RL&hash=item3f006…
... system but fails on the 12V the drive needs, and that ...+3 needs putting out of its misery[URL="http://cgi.ebay.co.uk/SINCLAIR-ZX-SPECTRUM-3-128K-FDD-GAMES-CLASSIC-VINTAGE-/270590074074?cmd=ViewItem&pt=UK_VintageComputing_RL&hash=item3f006…
... system but fails on the 12V the drive needs, and that ...grey +2 psu on an original 128?I have a 128 and both +2's.. a / b.. I notice one PSU is the same as the 128 , just grey and the 128 PSU I have is, well I will get it looked at .. i…
... , +12V 700mA, -12V 50mA
ZX+2A/B: 5V 2A, +12V 200mA, -12V 50mA ...+3 needs putting out of its misery[URL="http://cgi.ebay.co.uk/SINCLAIR-ZX-SPECTRUM-3-128K-FDD-GAMES-CLASSIC-VINTAGE-/270590074074?cmd=ViewItem&pt=UK_VintageComputing_RL&hash=item3f006…
... system but fails on the 12V the drive needs, and that ...testing if speccy is fully functionalHi, There is so much mention of T states but still confused. Does this mean if an instructin is out by a T-state or more then the speccy is faulty?…
... to check the +5V/-5V/+12V lines though.
Between ...Amstrad MP3 TunerNot Spectrum related but may be of use to someone. Seems like the MP3 Tuner for CPC computers is pinned the same as the output of CPC's: 6 pin DIN,…
... You will need an additional 12V power source.
[QUOTE ...+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. …
... it's more likely a 12V zener diode.
A ...+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. …
... . Your are completely right with -12v signal. The 4x1n4001 and C8 ...+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 -12V supply is correct, no need to change, negative pin of C2, C8 have to connect -12V signal.
For R6, middle pin (pin3) have to connect either pin 1 or pin 2.7805 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…
... supply). The rather easily damaged +12v / -5v circuit on the Spectrum ...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…
... (at a minimum: a suitable coil). Even if it's a ...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…
... (at a minimum: a suitable coil). Even if it's a ...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…
... supply). The rather easily damaged +12v / -5v circuit on the Spectrum ...Rest in Peace, Jonathan Smith (was: Frobush Absence)You may or may not have noticed the absence of the honourable Frobush aka Jofa Smifff from your forums... The explanation is a little sad but does ha…
... of spiralling off this mortal coil just yet. If I do ...
