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ZX Spectrum issue 6a - yellow border problem<p>Hello!</p><p>I have problem with my Sinclair ZX Spectrum issue 6A, 48K. </p><p>I have changed low memory (all 4116 IC's) and coil, all electrolyti…
... ) and coil, all electrolytics capacitors, TR4 and TR5, ULA - checked, Z80 ... -
Toastrack PCB verisonsA quick question - what are the main differences between the issue 6k and issue 6u motherboards in the toast-rack? Is one considered to be more relia…
A quick question - what are the main differences between the issue 6k and issue 6u motherboards in the toast-rack? Is one considered to be more reliable, etc than the other? -
not working issue 3Hi all, I received this mobo from ebay, after start i have this on screen [img]http://forest.no-ip.org/wos/issue3_01/20150728_135908.jpg[/img] …
... change ztx650 and ztx 213 tr4 and tr5 usually after this ... -
+2 Grey versionsThis thread is an attempt to pin down the various hardware revisions of the +2 Grey. If anybody can provide further images from their machines or fur…
... %20and%20video%20cables.pdf"]Requires TR4 mod for misplaced transistor.[/url ... -
I recapped my 128K toastrack, installed stereo kit and detached audio from video, but...Hello fellow forumers! I'm seeking for help: I've finally decided to change all electrolytic capacitors of my 6U (with all Panasonics 105oC)... Af…
... all electrolytic capacitors of my 6U (with all Panasonics 105oC)... ... exactly mods to my other 6U, just to see what ... />
Well, my 2nd 6U works perfect! This means it ... multimeter) with my 1st 6U or ask in the ... (just like my 2nd 6U)... Also, I may heated ... -
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…
... the RAM with sockets, replaced TR4 and TR5 (C2236 and A733 ... -
Faulty Issue 1Hi all, thought I'd document my efforts in getting another speccy working. I've never done this before so please bear with me... I recently took a p…
... -5V is missing. I replace TR4 and TR5 with their modern ... -
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…
... bottom 16K ram and replaced TR4 and TR5 to no avail ... wrong too.
[b]TR4 Test:[/b]
This seems ... -
Unresponsive Spectrum with Magenta border.This Spectrum is taking an age for me to repair, thank for all the help thus far! So after I switch on the ZX Spectrum+ I get the familiar white…
... .zigg.net/LRR/ along with TR4 & TR5 and for good ... -
Issue 3B turning offI'm trying to save a Spectrum Issue 3B. I restored the power supply section, changing the 7805, TR4, and TR5, besides all electrolytic capacitors. No…
... supply section, changing the 7805, TR4, and TR5, besides all electrolytic ... -
A ZX Printer returns to actionAfter quite some messing about, I've got my second printer working. There were 2 reasons it sat idle (apart from the obvious being it's a sh*tty 30 y…
... :
- Blew a speccy TR4 just by being plugged in ... -
+2 Grey - bluey about to blowI've been turning the TR4 bits around inside my Spectrun +2 Grey issue 3 and noticed that it looks like the blue guy is about to burst.... (I had ph…
I've been turning the TR4 bits around inside my Spectrun + ... -
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…
... . When doing this I found tr4 and tr5 missing so put ... -
Issue 4A, tests complete fine but get odd crashing problemHi all, I've got an issue 4A which has had all of its lower RAM replaced, TR4, TR5 as well as its CPU. It originally had quite high voltages (20-3…
... of its lower RAM replaced, TR4, TR5 as well as its ... and some very questionable RAM. TR4 and TR5 were replaced and ... -
What are the chances?Hi all, I've picked up an issue 3B, fairly clean board, no mods, wasn't starting correctly so I tried Brendan's diagnostic ROM and got this: [i…
... it made no difference. Checked TR4/TR5 and they appear OK ... -
Spectrum issue 4SI have an almost completely depopulated issue 4s board. Wondering what to do, repairs or spares? I hooked it up and the voltages are off, 5v is fi…
... to find these?
TR4 and TR5 are fine and ... -
Composite video ghost image on ZX Spectrum 128K +2Hi, I have a ghost image on the composite video out on my ZX Spectrum 128K +2 and have run out of ideas of what could be wrong. Does anybody have a…
... of ebay and have switched TR4 and TR8 to be the ... is not shorted
- both TR4 and TR8 seem okay. I ... -
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…
... Ω resistor;
2. U-turned TR4 (composite signal is not distorted ... -
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…
... in the correct polarity.
TR4 TR5 removed, checked tested good ... -
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…
... in the correct polarity.
TR4 TR5 removed, checked tested good ... -
ZX Spectrum 48k issuesHi all! A couple of days ago I bought my first 48k Speccy off ebay (I already own a beautiful QL expanded with QubIDE interface and 640k ram). It was…
... checks before power on (continuity, tr4/tr5, coil, power connector) and ... -
Toastrack - faint monochrome displayHi all, I've got a Toastrack with a video issue on both RGB and RF. I get a faint monochrome screen: on one LCD display it is predominately white,…
... TR3, 4, 5 & 6. TR4 (swapped for a TXR651) has ... -
128K Toastrack (Noisy video output)Hello there guys! Need all of yours guides and advices. Some time ago I bought a nice looking 128K from eBay (motherboard v6K) and put it aside for…
... new ones, 7805 voltage regulator, TR4 and TR5 transistors.
So ... -
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…
... off and found out that TR4 was not working. Today I ... not find anything obviously wrong. TR4 and composite mod were the ... -
48k Issue 6a Very sick indeed.Hi Guys. I have a 48k Issue 6a board that shows a white screen with grey border. The white screen has three black squares spaced equally on the le…
... change in symptom, recapped, checked TR4 and TR5 which seem ok ... the voltage regulator, capacitors, and TR4 and TR5 are ok, whats ... -
Character wobbleHello, I have an Issue 2 board which shows vertical character wobble. This happens for a few minutes followed by a few minutes of character sta…
... had the effect of destroying TR4 and causing the
-5V ... to rise to 20V once TR4 was replaced.
All ... -
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…
... component swapping:
- TR1, TR2, TR4, TR8, TR9
- IC 14 ... -
Got Myself a 128K “Toast Rack”! (Plus a simple audio fix guide.)I got myself a 128K Spectrum off of eBay the other day. It’s in pretty good nick, but the membrane went the way of the dodo sometime during shipping …
... Rack is of the ubiquitous 6U persuasion; nothing particularly remarkable about ... -
Spectrum 48K / composite mod / LCD TV: voltages out of the ULAHello Spectrum World I have juste bought again my first computer on ebay... a Speccy 48k issue 2 with a 5C112E-2 ULA. Just had to replace TR4 and …
... ULA. Just had to replace TR4 and it worked. Did the ...
