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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, -
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…
... devices in it was a TR1, picture was a bit blurry ... -
TR1 & TR2 replacement - now dark picture?Hi all I saw a list of diodes you could swap out for better modern equivalents. I saw TR1/2 could be replaced with BC547 which i had afew of (BC547 …
... better modern equivalents. I saw TR1/2 could be replaced with ... BC547, BC548 and BC549 in TR1/TR2 position (Usually improves picture ... -
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…
... 2+
ZTX313's in TR1/TR2 position can be replaced ... 2369 can be used in TR1, 2, 3 and 6 on ... =odious;218176]ZTX 312 at TR1, TR2, TR3 and TR6 on ... -
Spectrum Issue two problemI managed to bring back to life a issue two spectrum (at least the power supply cirquit). The screen is now crystal clear (after replacing all the el…
... the electrolytic capacitors and transistors tr1 and tr2).
The thing ... -
Shivery picture.I have two spectrums that show a shivery picture (vertical axis). The picture is crystal clear, it's just a slight vertical jitter but it is annoying…
... could be the problem. The tr1 and tr2 transistors have been ... -
Issue two picture qualityDoes anyone know if issue two and earlier spectrums have worse picture quality (in general, beside colours) compared to issue 3 and later? I mean on…
... version speccys.
Having replaced tr1 and tr2 ransistors and electrolytic ... -
TV Modulator. Can it be repaired?Is it possible, to repair tha TV modulator (after removing it) if it gives wavy picture? I replaced both transistors (tr1/2) and both electrolytic ca…
... ?
I replaced both transistors (tr1/2) and both electrolytic caps ... -
sinclair zx spectrum issue 6a (again) - how to repairHi All, Is there someone who may explain what these jumpers can be used for. [url]http://forest.no-ip.org/repair/jumpers.gif[/url] <- this is from …
Hi All,
Is there someone who may explain what these jumpers can be used for.
[url]http://forest.no-ip.org/repair/jumpers.gif[/url] -
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…
... ). The first is formed of TR1 and R51 (R52 is for ... -
Fuzzy Screen On 48k Spectrum.Hi there. I bought a Spectrum off eBay last week (another for my collection lol), and it suffers with a fuzzy screen e.g. it looks like interference …
... . While probing middle legs of tr1 & tr2 on good unit ... -
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…
... now output too.
TR1 also seems to be installed ... -
Modulator oddness - previous owner's mod?Hello, just bought a rubber key 48k Issue 3 I'm trying to fix up. I'm wanting to do a composite video out mod ( n00b at this) but the "spare" hole in…
... of the second resistor above TR1 , and the other end goes ... -
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…
... X2
3) Check/change TR1 and/or TR2
4 ... ? I checked the voltages at TR1 and TR2 and believe they ... -
strange solution with bad spectrum +2 t.v. sound2 weeks ago I bought a British 128 K ZX-Spectrum +2. At first it didn't have sound on the t.v. RF output. Adjusting L5 (IC 11: MC1376 audio modulato…
... (TEA2000) and connecting C31 to TR1 and R4 greatly reduced that ... -
Correction of +2 hardware errorsThis is a collection of various pieces of information picked up from various places, including a lot from this forum. I have edited it and reworded i…
... 4 and the emitter of TR1. This means that audio is ... -
ZX SPECTRUM 48K color problemsHello, I am asking for your help... I found a ZX spectrum in a garage of a friend. He gave it to me telling that it didn't work. To say the truth it…
... the following problems:
TR1 and TR2 transistor ( I replaced ... -
Project #1 : Speccy 128k+2 with diVide inside...Hi guys, I just have finished my Super Spectrum #1 The idea (I was thinking of that since 2007) was to fit an english grey +2 motherboard in a +2A…
... pin 4 and emitter or TR1 (to keep audio on RF ... -
TR1 and TR2 replacementCan anyone tell me the correct replacement part for these? This is for an Issue 4S btw
Can anyone tell me the correct replacement part for these? This is for an Issue 4S btw -
Pimping an Issue 4SSo theres this 4S I have, its been a pain in the backside for ages, this and that going wrong then I stupidly broke it properly by inserting a keyles…
... and heatsink, new transistors in TR1 and TR2 (may do the ... -
ZX Spectrum Pre-regulator DesignCarrying on from the "[URL="http://www.worldofspectrum.org/forums/showthread.php?t=44486"]Issue 2 crashes after about 30 mins[/URL]" thread... [QUOT…
... 5mm standard green LED
TR1 .... NPN power transistor, IC max ... 81-0710
Heatsink for TR1
R1 ....... 68 ohms 1 ... -
Issue 4S display improvementsHi all, I'd noticed that the display (via modded composite out) of the Issue 4S I repaired a while back (details [URL="http://www.worldofspectrum.or…
... a little further.
TR1 and TR2 weren't ZTX313 ... -
Issue 6A "scratchy" pictureSo I composite modded a 6A I have here, pictures ok but on some colours its not great, wavy lines in the border etc. What ive tried so far is repla…
... new caps and also replace TR1 and TR2 (ZTX313) with new ... -
Which ULA to fit in which issue SpectrumI spent a little while studying the resistor changes on page 30 of the ZX Spectrum 48K service manual. They all concern aspects of the video circuit …
... look at the resistor below TR1 and TR2 in the video ... amplifier / inverter made out of TR1. 8K2 for 5C112E, 10K for ... -
Issue 4s - Not 'Jailbars' but lines alloverIt's not another 'Jailbars' question!, but I've got this Issue 4S that aside from the 'Jailbars' on the Paper area of the screen which I can live wit…
... ceramic caps and also changed TR1/TR2 with BC547's, yet ... -
Whites are yellow - 48k Issue 2I have a 48k issue 2 that appears to be working fine. I've replaced all but 2 of the electrolytic caps (mostly because the 2 were not in stock at my…
... try replace the two trimmers (TR1/2) - ZTX 313 I believe ... -
Display bandsHi all, I'm busy working on an issue 3 16k Spectrum I picked up on eBay. I've upped it to 48k and put a new membrane in. I noticed the display was…
... the capacitors, no difference, replaced TR1 and 2, no difference. Finally ... -
48K Issue 6a wobbly and flickering TV outputHi folks, Found an untested issue 6A Spec whilst tidying up and it had a warranty sticker on it from a past repair which seemed to be a socketed L…
... usual I've checked voltages, TR1/TR2, the left-hand caps ... -
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…
... know transistors replacements for the TR1,TR2 and TR3? i have ... -
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…
... and would crash occasionally, tuning TR1/TR2 didn't affect the ...
