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Dead Spectrum SocietySo I'm getting back into real Sinclair computers rather than emulators. During the summer months I was lucky enough to buy a working ZX81 and was giv…
... , the heat sink on the voltage regulator gets quite warm after only ... . Numbering the pins on the voltage regulator 1,2,3 (from left ... -
Repairing a faulty 48K issue 2.I am investigating one of a pair of non-working issue 2 48K Spectrums that have been sitting in a cupboard untouched for quite a few years. I haven…
... .
I found its voltage regulator not to be working so ... .
With a new regulator I can now measure +5V ... -
The Sinclair ZX Microdrive Resurrection Project (long)Dear Spectrum fans! [Management summary: Download [url]http://www.bartheld.net/temp/mdv2img.zip[/url] and tell me what you think. All help very much…
... a better power supply, separate voltage regulator, two Microdrives, IF-1 and ... -
Semi-Dead Spectrum - Help RequestedI have finally got my hands on my two old Spectrums - neither of which work, but ideally I hope to get both of them working again. Spectrum number o…
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I have replaced the Voltage Regulator and the Spectrum now "boots ... -
ZX Spectrum problemsHello Everybody, I am new here, and I need some help in my ZX repairs : - I have a ZX Spectrum 48k board (issue 2) which power up but remains stuck o…
... IC6 all are ok, and voltage regulator ok,
but I don ... present on the main 5V regulator.
Please if anyone ... -
Issue 2 video problemHello all, Need some help with an issue 2 board that I 'm trying to restore. I've replaced all the electrolytic capacitors, changed the voltage regu…
... the electrolytic capacitors, changed the voltage regulator, tr4, and a Zener and ... -
PlusD Mini: implementing the CPLDI am doing my first attempts on creating a CPLD to use as replacement for the PlusD's GAL (and other logic lateron). I use the Xilinx XC9500XL series…
... I added the 3.3V voltage regulator, wired the chip to a ... -
Flashing coloured blocks - diagnosisHiya, hope this is the right place for this... Was given an Issue 2 48K by a someone yesterday that hasn't been powered on in 20 years, which works …
... is either down to the voltage regulator, TR4 transistor, ULA, or RAM ... into the Speccy), and the voltage regulator which gets 10.88V and ... -
One more grey +2 with video problemsI guess I need your help again to hopefully be able to do some proper troubleshooting myself one day. Here I have a grey +2, which could be a bottom…
... 1 and 3 on the voltage regulator and found 5V on leg ... -
ZX Spectrum and add-on temperaturesImre Jakli from Hungary sent me some interesting pictures which I think are worth to share. These are about temperatures he measured with a modern to…
... from the outside with original voltage regulator:
[IMG]http://benophetinternet ... />
And with replaced switching regulator:
[IMG]http://benophetinternet ... 's the board with new regulator:
[IMG]http:// ... -
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…
... that the 128 has a voltage regulator that will allow me to ... -
Next step for fixing my speccy?Hi guys, I've picked up my faulty Spectrum aiming to fix it. So I followed the excellent JouledperCoulomb videos on Youtube for the basics and I am …
... the resistance on the 5V voltage regulator, which levels out on 58 ... the 5V and -5V the regulator should be OK?
Help with 128k greyHello friends, need some help here on try fixing a +2 grey spectrum128. To keep it short, opened the case and the voltage regulator was missing, the …
... , opened the case and the voltage regulator was missing, the cables where ...I broke my 48k Speccy!!!!Hey guys, I am looking for some advice, I hope you can point me in the right direction. So, I went about replacing all the capacitors on my issue 4…
...
I checked the voltage regulator, TR4 and TR5 and as ... left hand leg on the voltage regulator using the 200k meter setting ...Heatsink for ULAHi, My Speccy 48k issue 4s starts to get temperamental when it's been on for a while. Machine itself is fine but loading gradually becomes more unre…
... replaced and has a new voltage regulator. A chum on Twitter suggested ...Power issues on a 6A 48 K SpectrumHello all! I decided to take another look at my 6A Spectrum that I broke via a bad joystick adapter, I’ve removed the bottom 16K ram and replaced…
... left hand leg of the voltage regulator gives a reading of 29 ...Issue 2 48k Yellow DisplayHi guys. As the title says, I have an issue 2 that's displaying the typical yellow/green colour screen at switch on. The picture is clear and stab…
... one, no difference.
Replaced voltage regulator.
Tried to adjust VR1 ...Issue 2 48k Yellow DisplayHi guys. As the title says, I have an issue 2 that's displaying the typical yellow/green colour screen at switch on. The picture is clear and stab…
... one, no difference.
Replaced voltage regulator.
Tried to adjust VR1 ...Timex Computer 2048 restoration projectHi All, I would like to share with you my restoration project of a broken TC2048. Make the story shorty it was my first computer in late eighties …
... sockets and also replaced the voltage regulator with a DC-DC converter ...Issues with Spectrum 48K on SCART input of LCD displaysHi *! I'm new to the forums, but not new to ZX Spectrum. I have bought a ZX Spectrum 48K in 1983 and own it since. It was stored some 20+ years on…
... way than replacing capacitors or voltage regulator, I will try. But first ...+2 grey - datacorder on/off switch?Hi everyone. Building a simple on/off switch to power up/down the tape deck will eliminate the noise in sound output? Is this a safe approach or …
... the heat generated by the voltage regulator)?Spectrum in a BoxI had a Spectrum+ sitting around for quite some time collecting dust. The case wasn't much to look at, and the keyboard was already missing two keys.…
... antenna socket
- original 5V voltage regulator replaced with Traco TSR 1 ...ZX in FPGA...Hmm..seems nobody is interested in a replacement PCB with FPGA...well..heading towards next FPGA projects then...C64 and others (o; [ This Messag…
... /5V bustranslators
5V/3V3 Voltage regulator
Connectors: VGA, Power, Joystick ...ZX in FPGA...Hmm..seems nobody is interested in a replacement PCB with FPGA...well..heading towards next FPGA projects then...C64 and others (o; [ This Messag…
... /5V bustranslators
5V/3V3 Voltage regulator
Connectors: VGA, Power, Joystick ...Will Spectrum run @ 60Hz?Sorry to overlap w/ my other recent post, but want to know, if I grab a Spectrum and use it in America with a voltage converter or a different power …
... 60 Hz generates a higher voltage after the bridge rectifier than ... more power dissipation in the voltage regulator then...Investronica Inves Spectrum +Hi, Has anyone here ever heard of the Investronica Inves Spectrum +? This site [url="http://www.silicium.org/uk/sinclair/inves.htm"]http://www.sili…
... specifically for that purpose. The voltage regulator is placed elsewhere and has ... composite. It also lacks the voltage connections -5, +12 and non ...my dodgy speccys.hi people, i was wondering if i could engage some opinions / thoughts / ideas of anyone, regarding my current "fixing up" of my speccys, since you s…
... the fault back to the voltage regulator but couldn't get a ...my dodgy speccys.hi people, i was wondering if i could engage some opinions / thoughts / ideas of anyone, regarding my current "fixing up" of my speccys, since you s…
... it has an internal 5V regulator. Get the polarity right though ... starving everything of power. The voltage regulator may get very hot if ...+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 D1046 is not a regulator, it is a transistor 2SD1046. ... pass transistor of the 723 voltage regulator circuit that forms the 5V ...Introduce yourself[SIZE=3][FONT=Comic Sans MS]This is the thread to stop by & introduce yourself.[/FONT][/SIZE]
... membrane (obviously) and make some voltage regulator and skip the RF modulator ...
