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Spectrum +2 / +3 PSU.Hi everyone, Does anyone happen to have the circuit for the power brick as supplied with the black +2 and +3 computers? Before anyone suggests …
... have the circuit for the power brick as supplied with the ... black +2 and +3 computers?
Spectrum +2 (grey): Mod- and operation- related advices needed.Dear Sirs and Ladies, Please welcome a newbie to the “World of Spectrum” (both to the forum and, well, metaphorically). I’ve recently purchased a…
... an attic-slumbering ZX Spectrum +2 (grey – the one with ... I’ve done some soldering (schematic pictures attached):
1. ... with 15 Ω resistor;
2. U-turned TR4 (composite signal ... be related to issue 2 below).
2. Datacorder (and, perhaps, ...My re-creacton of the Z80 8-bit Universal IDEI looked into my draw with various bits & bobs for PC and I found there a CF-IDE adapter, HDD ribbons and two CF cards. So, I was thinking to myself,…
... based on this well know schematic:
[img]http ... ://www.worldofspectrum.org/zxplus3e/images/schematic.gif[/img]
... .png[/img]
2. SMD type
[img]http ... activity LED just above the power indicator and changed my mind ...Issue 2 problem.Hi all, I'm trying to repair / upgrade an Issue 2 Spectrum for a friend, but have come accros the following problem. When I power the machine …
... to repair / upgrade an Issue 2 Spectrum for a friend, but ... problem.
When I power the machine on I get ... the odd thing, if I power up with the Sinclair test ... cartridge in my Interface 2 (or RAM turbo), the menu ...Repair Zx Spectrum +2 Blackhello there, just found a Zx Spectrum +2 Black edition Issue 1 board that doesnt appear anything on the screen, even led dont power on,i have tes…
... /> just found a Zx Spectrum +2 Black edition Issue 1 board ... the screen, even led dont power on,i have test the ... appears
should be power problem among others because the ... , how i can test the power componets of the board?
ZX Spectrum 48k Model 2 won't workHi, I started this discussion a while back on another forum and so I thought I start it here. I can't tune in to my 2 ZX Spectrum which are both Mode…
... 't tune in to my 2 ZX Spectrum which are both ... Model 2 in my Technika LCD TV ... the mod which you snap 2 wires and link another one ... which doesn't work. The power supply is OK, It is ... .S I have done the power tests on the 2nd one ...No CLK on issue 2 ULA pin 32I'm trying to fix an issue 2. The symptoms are as follows:- Black and white bars on screen, colours near impossible to tune in, although these po…
... trying to fix an issue 2.
The symptoms are ... /> I'm looking at the schematic and starting to suspect the ...Spectrum 128k +2 video issueHi Guys, I just got a Spectrum 128k +2 from ebay. It came with its power supply and the scart video cable. The machine is working pretty good but …
... Spectrum 128k +2 from ebay. It came with its power supply and ...Repair ZX Spectrum +2 black issue 1Hi all, after a long time i will try to repair a ZX Spectrum +2 black i found the last days i know for sure that CPU is damaged (already repla…
... to repair a ZX Spectrum +2 black i found the last ... working 48k, 128k and 128 +2 grey,can i put one ... check the status?
2)do you know transistors replacements ... ? i have to check that power is ok on the board ...Issue with TV signal + Inductor Coil (16K Issue 2 Speccy)Hello guys, I just got a 16K Issue 2 Speccy from eBay. It was sold as not working so I knew there would be some work needed before it's working ag…
... just got a 16K Issue 2 Speccy from eBay. It was ... basic measurements (this time with power on) and the only result ... - https://youtu.be/pQz6yP0PuIA
2) Measurements - https://youtu.be/vwgwX_Um73kSpectrum 128k +2 Grey and DivMMC reader problemHi guys, I am trying to figure out why the DivMMC reader do not work on a Spectrum 128k +2 grey I grabbed recently over the net. What is for sure…
... work on a Spectrum 128k +2 grey I grabbed recently over ... Spectrum 128k +2 is working apparently normally. It will power up and ... ok.
- the Spectrum 128k +2 will also load a program ... Divmmc will boot on first power up and then crash again ...Troubleshooting my +2To put this in context: a while back (i.e. late last year and earlier this year) I was looking to put together a compilation of modern Spectrum games…
... 30th birthday present for my +2, so I'm trying ... set to 128K+ or +2, whether I'm using fast ... It may be that my +2 has a problem with one ... +2 has also had since the early 90s is its power connection ... I know the old +/128K+/+2 power plug is nowhere near as ...Grey ZX Spectrum+2 128k Display problemHello, I have a grey ZX Spectrum+2 128k. I have the original power supply and I have recently tried to connect it up to a TV. The system appears…
... grey ZX Spectrum+2 128k. I have the original power supply and ... TV. The system appears to power on ok with the tape ...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…
... fix a ZX Spectrum issue 2 that I recieved.
Overall ... @ 500mA (which was enough to power a different Spectrum - Issue 3B ...ZX Spectrum Issue 4S composite video fuzzy (horizontal blur)Dear people of WoS, Thank you very much for taking the time to read. I have an Issue 4S I recently acquired and planned to fix up as a gift for a…
... of the text smeared ~1/2 character block width to right ... connector power voltages (noted discrepancy for 23 12vac shown on schematic?) : -5 ... )
Checked under side connector power voltages 4.92v (3), 8 ...+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 …
... referring here to the black +2's :)
Now, a ... shows the differences between the power supplies for these really is ... a +3 PSU with a +2 as its got higher output ... not meant to use the +2 PSU with the +3.
48K Issue 2 RAM issuesI have 48K issue 2 board (I've checked, the upper memory is present!). It's not very well. I've not attempted to diagnose one before, so please bear …
I have 48K issue 2 board (I've checked, ... br />
If I power it up, I get colourful ... pattern corruption. If I power it up with a DivMMC ... with
bit 2 = IC16 (IC7)
bit ... 174 = 10101110
bit 2 = IC16 (IC7) (from 166 result ...zx spectrum +2 cpu questionanother +2 mystery ... so just testing a +2 Z70700 issue 1.. although my power set up was a bit delboy .. PS2 power brick with modified end for the …
... testing a +2 Z70700 issue 1.. although my power set up was ... a bit delboy .. PS2 power brick with modified end for ... by voltage.. so tested the +2 with games,mainly 48k but ...Screen corruption with devices on edge connector (grey +2)Hi, I've recently done a full capacitor replacement and replaced all 16x DRAM chips on my grey +2. Prior to this I would get a corrupted screen…
... it sitting at the +2 menu screen for several ...
However, if I power the Speccy on with something ... up with screen corruption. Power it off, remove the ... device and power-on again and its ... I'm using the standard +2 power brick (barrel jack) and ...Spectrum +2 noobie questionsHi! A few days ago I ordered a Spectrum +2 from ebay thanks to a friend and before it arrives, I wanna be sure I'm ready to use it, so I got a few qu…
... ago I ordered a Spectrum +2 from ebay thanks to a ... about the reversed transistor in +2's that makes the composite ... are the specs of the power adapter exactly? I found a ...Audio input on a +2would it be possible to connect an external tape recorder to the socket at the back,or would something bad happen?
... a 128K either flavor (128, +2, +2A, +3, younameit).
schematic to convert speaker-level signal ... fit, then the internal motor power could be cut off to ...toasted soeccysHello, ive jsut bought a pair of speccys on ebay (one 16k issue 2 & a prob 48k issue 3) unfortunaly the genius who sold them tried to see if the wor…
... schematics for an Issue 2 suggests that the power supply that generates ... (+12v) is a switch mode power supply, which gets regulated by ...Hard drive crash - any help?My HD has crashed, the OS is Windows 2000 Server. Right at the start of the boot process it says "Error loading operating system". Running the reco…
... Windows Update up until about 2 months ago. But I never ... your hand, and try applying power.
(This tap is ... .tzx files made by myself, Schematic's + PCB layouts/cad project ...Testing RAM Chips After RemovalHi I am going to use Winstons Hot Air Gun method of removing the RAM chips from a 4S circuit board. I wish to check the RAM chips, I have a Logic Pr…
... re making the interface's schematic and the ROM's code ... I/O port decoding
- 2 x 74HC272 - one for the ... br /> - 1 x 74HC32 - quad 2-input OR gate, for the ... flash to be paged on power up and reset)
- ... ROM is paged in on power up or whether the Spectrum ...RGB cable problemI bought an RGB cable from a Polish dealer on Ebay for my Spectrum 128+, but I can only get an AV signal from it. I sent it back to him and he gave m…
... to +12V line (like Spectrum +2) or with a 220 Ohms ... ?t have the schematic to see if those power lines are present ... to AV channel when you power on the ZX_spectrum is that ...Trying to create NMI, whats this switch?Hi, I have been reading a book Z80 Applications, and I am trying to create a simple device for creating a NMI. Here is a schematic: [url]http://www…
... multiple NMI's. Now, this schematic is out of a "Z80 ... a 2 input Quad NAND gate. Do I need to power this ... ? I just wondered whether the power was just for some kind ...ZX Spectrum +2 RGB to CGA (RGBI) MonitorI just picked up a spanking brand new Goldstar 1410-CGA with RGBI. It has a 9 pin "D" type connector. 1 Ground 2 Ground 3 Red 4 Green 5 Blue 6 Inte…
... />
I corrected the schematic - only 1 resistor is neccessary ... level is also devided by 2 because of 75 ohm ... in +2 and 75 ohm in monitor. ... High level is 0.6V/2 lower and low level is ... ago because of a bad power regulator (most ICs got to ...I/O on the Speccy - ideas/help wanted!I'd like an interface for the Spectrum that can control and monitor other items. I have a task in mind that would require: A: 4xbinary inputs (as in…
... build your own with power MOSFETs.
2. A chip for ... />
3. Look up the schematic for the Kempston, you can ... how you drive your outputs. Schematic here:
[url]http:// ... gets capacitatively coupled via the power MOSFET doesn't do something ...Sinclair PC 200 - RF questionIs there any compatibility regarding the RF output of the sinclair pc 200? This week i got my 2nd unit and in both of them, when connected through R…
... is an error on the schematic, pin 2 is output, pin 3 ... .[/B] -> This reads 6.2 Volts (with the positive tip ... /> [B]so make sure the power supply does not produce 50 ...Sinclair PC 200 - RF questionIs there any compatibility regarding the RF output of the sinclair pc 200? This week i got my 2nd unit and in both of them, when connected through R…
... /> [B]so make sure the power supply does not produce 50 ... caused by 50/100 Hz power supply.
You did ... mentioned before with the +2 like schematic) to avoid additional effects caused ...
