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Faulty 48+ Help NeededHi, This is what I get when I plug in the spectrum, this is tuned in. Vid shows a reset. Any ideas, or pointers on the first thing to check. Keyboa…
No colour would suggest that TR4/TR5 have failed. A supply rail ... -
Faulty 48+ Help NeededHi, This is what I get when I plug in the spectrum, this is tuned in. Vid shows a reset. Any ideas, or pointers on the first thing to check. Keyboa…
... =lesoleil70;789908]I'll check TR4 and TR5 ASAP.
I have ... a shroud over the legs on tr4 ... indicate any faults. If TR4 & TR5 test OK in circuit, power ... -
'Interesting' Issue 2 modSo I've been lurking on this forum for a while and I've got to the point where I want to see if I can repair a speccy.. so I bought me a 'broken' one…
... like the 7805 regulator, replacement TR4/TR5 transistors, capacitors etc are peanuts ... -
Faulty 48+ Help NeededHi, This is what I get when I plug in the spectrum, this is tuned in. Vid shows a reset. Any ideas, or pointers on the first thing to check. Keyboa…
Ah don't sweat it just they are pennies to get on amazon or ebay.
I'll come back on this when I've changed TR4/TR5.
Could be a few weeks, got a few crazy weekends ahead. -
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…
Just tried replacing TR4 & TR5 with no luck and swapping ... -
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…
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…
... this up before however as TR4 looked to have been replaced ... point. I've since changed TR4/TR5 with new components. Looks like ...Dodgey R62 / D16 on Issue 2?Hello all, I am still beavering away trying to work out why my Issue 2 fails and after a much closer visual inspection I noticed what looks like som…
... first, then check and replace TR4/TR5 if required. If all voltage ...Smokin... more 48k woesHi, it looks like I've converted another Spectrum 48K+ into a smoke machine. I'd been rebuilding an Opus Discovery unit and everything looked good. …
... . )If there is that voltage, TR4/Tr5 are o.k., if not ... , then Tr5 (and Tr4) might be dead.
Smokin... more 48k woesHi, it looks like I've converted another Spectrum 48K+ into a smoke machine. I'd been rebuilding an Opus Discovery unit and everything looked good. …
... . )If there is that voltage, TR4/Tr5 are o.k., if not ... , then Tr5 (and Tr4) might be dead.
TR4/5 and replace these tomorrow ...Smokin... more 48k woesHi, it looks like I've converted another Spectrum 48K+ into a smoke machine. I'd been rebuilding an Opus Discovery unit and everything looked good. …
... replace a burned TR4 in seconds :)
TR4/TR5 will have to ...Smokin... more 48k woesHi, it looks like I've converted another Spectrum 48K+ into a smoke machine. I'd been rebuilding an Opus Discovery unit and everything looked good. …
... replace a burned TR4 in seconds :)
TR4/TR5 will have to ...48K Upper memory issues?Having more issues with the 48K spectrum I just fixed that had the black screen in this thread [URL="http://www.worldofspectrum.org/forums/showthread…
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Replaced 5V Regulator, TR4 & TR5. Also the standard Electrolytic capacitor ...I broke my 48k Speccy!!!!Hey guys, I am looking for some advice, I hope you can point me in the right direction. So, I went about replacing all the capacitors on my issue 4…
... .
Have you removed TR4/TR5 from the board and tested ...I broke my 48k Speccy!!!!Hey guys, I am looking for some advice, I hope you can point me in the right direction. So, I went about replacing all the capacitors on my issue 4…
... .
Have you removed TR4/TR5 from the board and tested ...Cooking toastrack... the dreaded smellI powered up my Spectrum 128 (heatsink model) yesterday only to see what looked like an out-of-tune picture on the television. I'm using a scart adap…
... a Ram Turbo took out TR4/TR5 on one of mine recently ...Switched voltage regulatorIn the past a replacement voor the (hot!) 7805 has popped up a couple of times in various threads. As far as I know, Recom Power Inc. was always ment…
... much less current!), but the TR4/TR5 circuit stops oscillating for voltages ...Spectrum 48K Ferranti ULAIs there anywhere to get hold of the ICs in the subject? Martin
... -DC conversion circuitry (primarily the TR4/TR5 transistors).
Check voltages ... PCB).
Then replace TR4/TR5, see if all voltages are ...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've now removed my TR4 from the inner set of ... a ZTX751 ready to replace TR4/TR5.
I've also ... . I am tempted to replace TR4, TR5 and IC8 and then power ...another non working issue 3 48kHi all, next! :) I don't have good filings about this speccy :) https://youtu.be/D9qpCR18-kI here is short video what this speccy do. we hav…
No -5v would indicate a D16 (5v1 Zener) failure (D19 if it's an issue 3B board), all other things being ok (TR4/TR5/recap).
5v measuring 4.95v would indicate no shorts on the board.
BFaulty 48+ Help NeededHi, This is what I get when I plug in the spectrum, this is tuned in. Vid shows a reset. Any ideas, or pointers on the first thing to check. Keyboa…
... the fixes/replacements.
TR4 / TR5 replaced
Lower Ram NOS ...+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…
... this +2 have been swapping TR4, TR5, removing C31 to resolder to ...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…
... was after the RAM and TR4/TR5 was replaced or not. My ...48k Speccy died, resistors getting too hot to touchHi folks, With 2 days to go till an exhibition my trusty dual-boot 48K issue 3b that I made last year has given up the ghost and I'm not sure I ha…
Check voltages on the lower RAM - I'd wager that -5v and +12v are missing, caused by a shot TR4/TR5.
BMeddling with the RGB signal - any experts out there?A few questions, if anyone knows - is it OK to split the A/V signal and feed it to two TVs? I'm assuming that it's not OK to do this with the RGB …
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…
... board has all three transistors - TR4, TR5 and TR7 - fitted the correct ...Trying to repair a Speccy 48k - No PulsingI've had this machine for ages. I'd I've been putting off fixing it for some time now. So a couple of days ago I pulled it apart and started prob…
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Compare the circuit around TR4/TR5 with a later (issue 6A ... there are two positions for TR4 and TR5, each for transistors with ...Trying to repair a Speccy 48k - No PulsingI've had this machine for ages. I'd I've been putting off fixing it for some time now. So a couple of days ago I pulled it apart and started prob…
... in on the area around TR4 & TR5, TR5 appears to be a ...Trying to repair a Speccy 48k - No PulsingI've had this machine for ages. I'd I've been putting off fixing it for some time now. So a couple of days ago I pulled it apart and started prob…
... in on the area around TR4 & TR5, TR5 appears to be a ... in on the area around TR4 & TR5, TR5 appears to be a ...Trying to repair a Speccy 48k - No PulsingI've had this machine for ages. I'd I've been putting off fixing it for some time now. So a couple of days ago I pulled it apart and started prob…
... are dealing with the original TR4 & TR5 as the machine left ... sure that the ordering for TR5 on your PCB is EBC ...
