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Issue 3B problemHi! I have an issue 3B board that is having a strange problem: when I got it it didn't had the -5V and +12v, as usual. After replacing TR4 and TR5 t…
... capacitors and transistors and change TR1,TR2, C65 and C25. According ... -
issue 4s for reapirHi All, This time I have issue 4s for repair :) Here is few screen shots and small movie after boot. [url]http://forest.no-ip.org/issue4s/[/url] I kn…
... /> tr7 = d471a (y-3d6)
tr1 = C945 (y-3d5)
tr2 ... -
ZXPROJECT update: a replacement for TEA2000Just go to [url]http://www.zxprojects.com[/url]
... have to bypass TR2 and TR1 and connect directly from the ... -
Spectrum dead: 8 vertical bars in alternating colorsI have been soldering on this basterd for a long time now. All IC's now have sockets (except the LM1889). I swapped all 4116's by types that are 100%…
... far I have not replaced TR1, TR2, TR8 and TR9 (but ... -
I bought my first ZX Spectrum 48k, now what ?Hi guys ! I recently go to Brussel in Belgium and found a ZX Spectrum at a "flea market" (sorry, I don't the correct word for that, let's call it a …
... 's composite output is via TR1/2 which form an [URL ... -
OptimisationI've participated in several thread hijacks about this, so perhaps I should open a new thread. Et VIOLA! Here it is! Knuth, who was earlier reporte…
... a hash_map.[/quote]
TR1 is available on all the ... -
Broken or upgraded ZX Spectrum 48kHello First i want to say hello to everybody. I have a new ZX Spectrum 48k in my collection. Seller said that it is broken (no picture). I have this…
... is wrong with video circuit? TR1 or TR2?
Can you ... -
Broken or upgraded ZX Spectrum 48kHello First i want to say hello to everybody. I have a new ZX Spectrum 48k in my collection. Seller said that it is broken (no picture). I have this…
... is wrong with video circuit? TR1 or TR2?[/QUOTE]
Possibly ... -
Broken or upgraded ZX Spectrum 48kHello First i want to say hello to everybody. I have a new ZX Spectrum 48k in my collection. Seller said that it is broken (no picture). I have this…
... I plan to replace LM1889N, TR1 and TR2 (I will get ... -
Challenging the orthodoxy - Composite modWell, what's brought this on is two things: firstly I composite-modded an Issue 4S board this weekend in preparation for the Vintage Computing Festiv…
... 's composite output is via TR1/2 which form an [URL ... -
I am currently playing......Don't know if there's been a thread like this, but I can't find one.... Having seen all the different threads asking people if they've played such a…
... . The story ties in with TR1 (also anniversary) and TR:L ... -
How to make a comp video cable for +2 greySorry to bog, maybe the clue is just laiden on another thread but.... I have just obtained a 128 +2 grey, fully working BUT the aerial signal is bad…
... it instead to emitter of TR1 (BC239 - that transistor direct before ... -
Worst gaming decisions ever?In a different thread, I mention what, to me, is probably the single greatest mistake in the history of computer/console games design ever. Here are …
... and I hated it. In TR1 there were strategically positioned crystals ... -
Worst gaming decisions ever?In a different thread, I mention what, to me, is probably the single greatest mistake in the history of computer/console games design ever. Here are …
... and I hated it. In TR1 there were strategically positioned crystals ... -
Worst gaming decisions ever?In a different thread, I mention what, to me, is probably the single greatest mistake in the history of computer/console games design ever. Here are …
... and I hated it. In TR1 there were strategically positioned crystals ... -
Strange device, TR1?Browsing through ebay I came across someone selling a [URL="http://cgi.ebay.co.uk/1982-ZX-spectrum-tape-machine-docking-station-games-/280599485408?p…
There's a photo of the TR1 over at [URL="http://home.freeuk.com/joro/zx80/zx80.html"]another ZX80 archive[/URL] -
Strange device, TR1?Browsing through ebay I came across someone selling a [URL="http://cgi.ebay.co.uk/1982-ZX-spectrum-tape-machine-docking-station-games-/280599485408?p…
... could be a simple transformer (TR1) transforming the low output impedance ... -
Rubber Key ZX Spectrum - White ScreenA customer has just telephoned me about a rubber key 48K ZX Spectrum which he has purchased second hand. It produces just a white screen on the tele…
... part near there being shorted. (TR1 and TR2 on the issue ... -
Opus composite video and joystick portIve had it apart and had a good look around and cant for the life of me see whats wrong, if the joystick is selected in a game(kempston) the characte…
... first. This is done with TR1 and TR2 in the video ... -
Grey +2 video output and oddities.I've been experimenting with one of the above that I acquired years ago, but had just been buried at the back of a cupboard. I've connected it up to…
... . The same for TR5 and TR1. I have now re-installed ... TR1 correctly too and it doesn' ... -
At the Carboot sale today.Today at the carboot sale I picked up An Acorn Electron -I see these all the time, An Official Branded BBC Micro Datacassete Recorder - I'v…
... . The atmosphere is more like TR1 and not as disjointed as ... -
48K and wavy lines.It seems all Spectrum related things are breaking here at casa de Don Pedro. After the problem with my old ZX81, I went over to my issue 2 ZX Spectru…
... thread about it. :-)
TR1 and TR2, I would say ... -
Best platformers?What do you guys think are the best platformers for the Spectrum?
... . ;)
But, we talking about TR1 from Core Design (especcially PS1 ... -
Best platformers?What do you guys think are the best platformers for the Spectrum?
... fact, it is TR2, but TR1 comes second, I think). I ... -
Best platformers?What do you guys think are the best platformers for the Spectrum?
... revolutionary. In Order I prefer TR1,Last Revelation,Legend,TR2 -
Best platformers?What do you guys think are the best platformers for the Spectrum?
Yup, the first screen in TR1 is so damn well designed! that snowy cave entrance got you before you could blink! -
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…
... and replaced at first the Tr1 and 2 with Bc172 but ... -
+2 grey rf out problemI got a kind of broken +2. it basically works, but with a annoying rf out problem. When screen goes black (eg. after border 0: paper 0 command) it l…
Hi ZetrO,
you are rigth, that Amstrad did this mistake with TR4. But TR4 does not process the signal that goes to the RF unit. TR1...TR3 processing that signal and there is no such error around that transistors.
Greets Ingo. -
Black and white composite displayJust pulled out an old CRT display and tried my trusty rubber key on it (comp modded), im using one of those scart adapters for an xbox to accept the…
... of the video stage (transistors TR1 and TR2) being out of ... -
ZTX313 vs 2N2369 pinoutJust for info: [IMG]http://benophetinternet.nl/hobby/vanmezelf/2N2369 vs ZTX313 pinout.jpg[/IMG]
Great links, Mark! Cheers!
Replacing TR1/TR2 on an Issue 2 sounds interesting. I just wonder whether the letter at the end makes a difference (BC548B/C resp. B549B/C)?
