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Almost no picture on a toastrack Issue 6UI?d need some help with a toastrack, that hardly shows any picture on both the RF and RGB. It?s totally distorted. I had this before and I remembered…
... and I remembered that replacing TR4/TR5 did help. However, this ... need to replace on a 6U? -
Spectrum +2's and TR4...?Hi people, I saw mentioned in another thread (+2 composite mods) that TR4 is the wrong way round on grey +2's. Can someone give me more info on this…
... thread (+2 composite mods) that TR4 is the wrong way round ... -
TR4 is goneMy TR4 transistor is burned. Can I replace this transistor with a TIP31B or C ? My 4116 RAM ic?s are showing +0.05V, +5V and +8.49V... :) My Spectru…
My TR4 transistor is burned.
Can ... ?
Could be the TR4 the problem of colour, too ... -
Help changing TR4 and TR5Hi all! Please, help me! :) I think I'm not understanding the correct pins of TR4/TR5 and the transistors. So, if anyone know the correct pins, help …
... understanding the correct pins of TR4/TR5 and the transistors.
TR4/TR5.
And I found ... original pins that?
TR4 TR5 TR4 TR5
E ... -
TR4 or TR5?My issue two gives horizontal bars on bootup. Flicking reset takes it to copyright screen though. I measured voltages and got 4,9V, 11,99V and -4,3V.…
... of threshold but was it TR4 or TR5 that needs changing ... -
TR4/TR5 replacementHi guys, I've got another Spectrum I'm working on now - an Issue 4S this time. When I originally got it, I powered it up and did the basic tests a…
... I need to replace TR4 and TR5 in order ... I had some confusion with TR4. Looking at all the ... board. Photos show that TR4 should be installed in the ...
I've since replaced TR4 (marked ZTX650) with a new ... ideas about what happened to TR4? It looks like it ... -
Tr5 tr4I need to replace tr4 and tr5... What arr the fine replacement equivalent? I see the sinclair logo copyright but is distorted and in two line... Ca…
I need to replace tr4 and tr5... What arr the fine replacement equivalent?
I see the sinclair logo copyright but is distorted and in two line... Can everyone help me? Is a zx spectrum+ iussue 4b
Thaks -
Finally got myself a 128k toastrack too ! :)Hi all, I recently bought a vintage computers lot on eBay, just because there was a toastrack inside (and a better looking CPC 6128 with edge conne…
... v instead of 12... Changing TR4 and 5 resolved the problem ... !!!
It's an issue 6U with an Amstrad ULA.
help with issue 3 48k speccy after recap and new tr4 and tr5I have a 48K speccy that was not working. After recapping and replacing TR4 and TR5 it came back to life However after a short while running weird …
... .
After recapping and replacing TR4 and TR5 it came back ...upper ram tacks / TR4 socket...[url="https://photos.app.goo.gl/MkqzRCuNCV3EPr9E7"]https://photos.app.goo.gl/MkqzRCuNCV3EPr9E7[/url] you can only replace that pesky TR4 so many t…
... can only replace that pesky TR4 so many times .... surprises me ... that with TR4 not in place or when ...Replacement for ZTX213 I`ve had a power problem with a speccy standard 48K the +5,-5,+12 volts power on the board has gone , so I need to replace the TR5,TR4 which are ZT…
... need to replace the TR5,TR4 which are ZTX213 & ZTX651 ...128k dead, no TV signalI got 128k spectrum (heatsink model) from a friend of mine. He told me that speccy is dead, and he doesn't know what's wrong with it. When I plugged…
... brand new. Motherboard is VERSION 6U.
I used multimeter ...Component Equivalents/substitutionsA while ago, I mentioned to somebody in a thread that we should have a list of component equivalents and substitutions so that it's easier to fix our…
... in place of ZTX650 in TR4 position issue 2+
BC184 ... person has experienced problems substituting TR4 ZTX650 with a BC487. Transistor ... instead of ZTX650 as a tr4 (in 3 boards). When replaced ...Spectrum 48k SeettingGot an issue 2 speccy on the bench that had a poorly ula, changed that, also changed tr4 and tr5 (had no oscillator) now it just resets over and over…
... ula, changed that, also changed tr4 and tr5 (had no oscillator ...TIPP31 transistor questionYesterday I had the time to try and repair a 4S issue 48k spectrum I had. First of all I replaced all the electrolytic capacitors. The tr4 transistor…
... the electrolytic capacitors.
The tr4 transistor was totally burnt so ... working fine, the TIPP31 transistor (tr4) is getting hot, not instantly ...Unconventional way of diagnosing a faultHi everyone Some time ago I got a 48k Spectrum (issue 3B board) in a pretty bad condition. I believe the power supply transistor TR4 failed, causing…
... believe the power supply transistor TR4 failed, causing a short circuit ...PC Power supply for SpeccyHi all, after 13 years with out playing spectrum games I am eager to play the old games. Thus I got up to the garret checking my old stuff. Two of m…
... usual the Power Unit with TR4 and TR5. It brakes rather ...tr1-2-3-4-5hi guys, can someone tell me, what is the exact function of each of the five transistors i have on my zx+3 i mean the black transistors TR1 TR2 TR3 T…
hi guys,
can someone tell me,
what is the exact function of each of the five
transistors i have on my zx+3
i mean the black transistors TR1
TR2 TR3 TR4 TR5,
thanx,+3 sound problemHello! I've bought +3 a year ago and I wasn't really impressed with it's sound. It was really bad. Then I found this page [URL="http://www.secarica…
... C37, C40, C39? Maybe TR5, TR4? It looks like one of ...Zx Spectrum 48k,128k e +2Hi, I'm looking for Speccy 48k issue 5, a Spectrum 128K issue <>6U and ZX Spectrum +2 grey issue 2 and 4. Matteo
Hi, I'm looking for Speccy 48k issue 5, a Spectrum 128K issue 6U and ZX Spectrum +2 grey issue 2 and 4.
MatteoIs it possible to use external power supply for +-12; +-5 for ZX SpectrumRecently I acquired a damaged Sinclair ZX Spectrum, issue 3B. According to the maintenance manual I have to replace TR4 and TR5. These type of transi…
... manual I have to replace TR4 and TR5.
These type ...Speccy 48In my messing around with hardware, I have managed to nacker a Speccy 48 board. Specifically, i have managed to mess up the power inverter section. …
... (Labelled C79), a very large TR4 (Labelled C2235A), and TR5 turned ...issue 2 board c34 getting hotHi All, Can anyone help with c34 getting hot very quickly? I`ve got an issue 2 board, there is no `buzz` from coil. yet the spectrum initalises to co…
... or blue. I have replaced TR4 and C34 and removed all ...issue 6a faultyHi All I got issue 6a pcb from ebay with status faulty pcb had bad voltages when I power up I changed tr4 ztx650 and all voltages got back on ic6 I h…
... power up
I changed tr4 ztx650 and all voltages got ...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…
... +12v, as usual. After replacing TR4 and TR5 the -5V came ...Welcomes...and some technical stuffHello I`d like to welcome all ZX Fans. I`m rather ATARI 8bit geek - I got this grat machine when I was 14...20 yeras ago... There were few ZX in …
... `m right - after explosion of tr4 transistor and coil failure, wouldnt ...ZX Spectrum + Revision b Power IssueHi all, I'm trying to repair a ZXSpectrum + revision 3b and at the moment the -5v is missing from the board. I've replaced the TR4 and will be soon…
... />
I've replaced the TR4 and will be soon replacing ...Spectrum 128+ (No TV picture)I got a Spectrum 128+ which is not generating any picture. I checked the TEA2000, and it gets not 12 Volt, but only 1.4, so this is the problem, I gu…
... headphones.
What to replace? TR4? C44? I cannot read the ...Trying to fix Spectrum Issue TwoHello everybody, I bought from eBay three Spectrums - one is Issue Two and the other two are Issue 3. The Issues 3s look like they are working but t…
... Worsley and I found that TR4 ([url=http://cgi.ebay.co ...
