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Pagesoft (missing company)[URL="http://www.worldofspectrum.org/infoseekpub.cgi?regexp=^Martin+Page$&loadpics=3"]Martin Page[/URL] had a company entity (whether real or not) c…
... .worldofspectrum.org/infoseek.cgi?regexp=^Missing+Princess%2c+The$&pub ... +Page$&loadpics=3"]The Missing Princess[/URL]:
[img ... -
The rescue of a coil.The problem at hand was a known defect transformer from the switching convertor inside a Spectrum. Both windings are not interrupted and not intercon…
... takes 3 seconds. 12V measures 11.98, minus 5V measures -4.94 ... -
Issue 2 voltage troubleDear all, I got my hands on an old issue 2 from a friend. Price was close to zero so I did not hesitate to take it. After powering it up I was sur…
... to measure the usually problematic -5V and 12V supply. So what I ... -
Repairing another Issue 2 48K Spectrum.I said at the start of the other thread that I've got another one of these and I've started investigating it. The board is more-or-less exactly the …
... lines and found:
12V - 850 Ohms. Exactly the same ... the working Issue 2.
-5V - 80K Ohms and rising. I ... on the working one.
5V - 1.5K Ohms. This seems ... the DRAMs. 5V was present, -5V wasn't and 12V was about 8V ... -
Repaired some 128K's todayI have lot's of ZX Spectrums laying aside with some more complex defects. Today I decided to try to fix some of them. I thought: why not share my ex…
... The CPU did nothing although 5V, 12V and the clock signal ... power problem: no 5V and no 12V, allthough the picture ... measured the resistance between 5V and 0V and it ... /> I started cutting the 5V cupper lines to the ram ... Problem is that the 5V that flows in the ... -
Spanish type-ins missing from the archiveThere are several ones missing, are they waiting in line to be added or just still out of control?
There are several ones missing, are they waiting in line to be added or just still out of control? -
BeginnerIm having a go at fixing a spectrum which has been in the loft for 20 years and would like some advice please.... I have downloaded the 'spectrum se…
...
+5v on pin 9 of IC6
+12v on pin ... 8 of IC6
-5v on pin ... -
The missing poly quizAnyone know whats missing out of these poly inners? [url=http://postimage.org/image/m03464fij/][img]http://s17.postimage.org/m03464fij/IMG_9413.jpg[…
Anyone know whats missing out of these poly inners?< ... -
NonTerraqueous I/II/III/IV/?? (missing third and fourth sequels)NonTerraqueous series (BTW this series does not show up in the Advanced Search, is that because it needs a name? (how about [I]NonTerraqueous series…
... "]Soul of a Robot[/URL] ( missing AKA NonTerraqueous II as per ... -
Local missing boy just been found.For the past 2 hours, my village has had a Police helicopter flying just above the rooftops, with a woman constable calling out a message over what m…
... message apparently said,"Please Help, Missing boy, 7, red shirt, please ... -
Grange Hill (missing credit)[URL="http://www.worldofspectrum.org/infoseekid.cgi?id=0002120&loadpics=3"]Grange Hill[/URL] Frodo lower right [img]http://www.worldofspectrum.org/…
... a full list of credits. Missing from the WoS listing are ... -
MASK II (missing credit)[URL="http://www.worldofspectrum.org/infoseekid.cgi?id=0003044&loadpics=3"]MASK II[/URL] As per the in-game credits (also seen in [URL="ftp://ftp.wo…
... [/URL], far right), these are missing:
J. Perkins, M. Dooley ... -
TR4 continues blowing up!The TR4 of my Speccy Issue 3 continues burning even after I changed all electrolytic capacitors and the BA157 diode. If these things serve only to h…
... things serve only to have -5V and +12V, can I remove all ... , add 4164 and use a +12V power supply instead of a ... -
48k PSU UpgradeCan anyone give the definitive word on a PSU upgrade (rather than just a replacement) for 48k machines? I'm thinking of adding at least an IDE inter…
... /ATX PSU and regulating the 12v line down to 9v or ... 's regulator and using the 5v line. I just need to ... my 7" TFT screen using 12v.
Purchasing a beefy ... so I should only need 5v internally although either way I ... -
4116 replaced with 4164 - ProblemsThanks to Velesoft I have some 4164s, and I have cut the -5V line below R9 where it pass from one side of the PCB to the other. I have cut the +12V a…
... , and I have cut the -5V line below R9 where it ... other. I have cut the +12V at C44 where it goes ... ram. And I have left +5V on A7 for now. I ... have routed +5V to pin 8. However, this ... 4116s back, reattaching the -5V and -12V everything work again. So I ... -
4116 replaced with 4164 - ProblemsThanks to Velesoft I have some 4164s, and I have cut the -5V line below R9 where it pass from one side of the PCB to the other. I have cut the +12V a…
... , and I have cut the -5V line below R9 where it ... other. I have cut the +12V at C44 where it goes ... ram. And I have left +5V on A7 for now. I ... have routed +5V to pin 8. However, this ... 4116s back, reattaching the -5V and -12V everything work again. So I ... -
4116 replaced by 4164 - "Noisy" paper?After I replaced my 4116's with 4164's and hooked them up to +5V, disconnected -5V and +12V, I have what looks like vertical lines in the paper, like…
... hooked them up to +5V, disconnected -5V and +12V, I have what looks ... /> If I reattach the -5V and +12V and replace the 4164's ... -
Issue 4S Schematics and DC-DC circuitA while ago I bought a Spectrum 4S that had problems tuning. I removed the RF tuner as I was not going to use it and did the composite mod. It worked…
... /> I currently have no +12V or -5V from the DC-DC circuit ... -
Need some advice about electronicsI have wired up an ATX power supply to power my spectrums through a DC-DC converter that gives 9V from the +12V rail. It works well. However, I also …
... that gives 9V from the +12V rail. It works well. However ... pcs here. It runs on 5V, and I thought I was ... wired up a connector on +5V from the power supply.
Using an ATX power supply - Spectrum 48kOK... I have an Issue 3 48K model and the DC-DC converter does not work and I can?t make it work. :( There is a MOD to use an ATX power supply on the…
... /> The author plugged the -5V, +5V and +12V direct from the power supply ...Issue 3 power problemHi all, I have an issue 3 board with an odd power problem, I have no -5V in fact, measuring the voltage on this line leads to a surprising result : …
... problem, I have no -5V in fact, measuring the voltage ... 3 board, but still no -5V.
I have ... snipped out the -5V decoupling caps for the RAM ... must be working as +12V is fine, though comparing ... br />
Does the -5V go to anywhere other than ...Missing author in "Catastrophes"By the way, I learned today that this group, which wrote some well known games, like Impossible Mission 2 or Caesar the Cat, are Hungarian, you alway…
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?Where to send missing hardware photos?What's the preferred method for uploading missing hardware photos? I can only find a form for software.
What's the preferred method for uploading missing hardware photos?
I can only find a form for software.David Bolton Softography, missing games?There are some games missing, as per his permission email: [url]http://www.worldofspectrum.org/showwrap.cgi?permit=individuals/BoltonDavid.pmt[/url]…
There are some games missing, as per his permission email:< ...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 ...+3 Floppy drive helpHi guys, I recently found my old spectrum gear and started to see if it all still works, now i had/still have a floppy disk system - Thurnall disk d…
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…
... main memory and the +5V is missing on the pin9 of the ... is present on the main 5V regulator.
Please if ...Nightmare Parl advert missing the linkWhen checking the entry for the game: [url]http://www.worldofspectrum.org/infoseekid.cgi?id=0019371[/url] There is one of the adverts, whose link i…
When checking the entry for the game:
[url]http://www.worldofspectrum.org/infoseekid.cgi?id=0019371[/url]
There is one of the adverts, whose link is missing.+2 (Grey) and AT/ATX PSUAny ideas on the best way to power a grey +2 board from an AT or ATX PSU? Looking at the schematic, I could do this one of two ways... 1: Bypass th…
... the PL11 header) and supply +5v where 9v normally goes.
5v to pins 2 and 3 ... with connecting it straight to 12v and making the regulator get ...
