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Another broken SpeccyHi all I have been given another ZX Spectrum, this time it has a really odd problem as you can see in the video: [URL="http://youtu.be/ZOSiBEYQD7w"…
Another broken SpeccyHi all I have been given another ZX Spectrum, this time it has a really odd problem as you can see in the video: [URL="http://youtu.be/ZOSiBEYQD7w"…
... be damaged if the -5V supply is missing.
Second, are you ...New hardware for Spectrum from ShaosI have some ideas for new ZX-peripherals and quickly designed a prototyping board for experiments: [URL=http://nedocon.com/store/speccy/][IMG]http:/…
... assume that on that fixer +12V (max 200mA on +2A/B ... voltage regulator that creates independent +5V on the +D board, right ... - full scale "fixer" does have +12V connected to +9V line: [url ...Toastrack trouble[IMG]http://i44.tinypic.com/11lq7id.jpg[/IMG] Sorry about the picture size, cant figure out how to make it smaller! Anyway, the pic says it all, th…
... at the TEA then the +12v generation circuitry isn't working ... 's only kicking out 4.5v - replace that too.
Toastrack trouble[IMG]http://i44.tinypic.com/11lq7id.jpg[/IMG] Sorry about the picture size, cant figure out how to make it smaller! Anyway, the pic says it all, th…
ULA (IC1), the +5V pins are pin 13 and ... /> Internal Power supply - Check for +12V across C44
Check ... for +12V on pin 11 on the ...Video problem on grey +2I have a bad video problem on grey +2. The computer is in a poor shape, but the major problem is with the video. With a (known good) SCART cable I ca…
... /> The TEA basically is fed 12V on pin 11, ground is ... socket and use a 1.5V AA battery to ensure that ... , LK3 closed: RGB pin 5 = 12V
LK2 closed, LK4 ... open: RGB pin 1 = 12V
LK2 open, LK4 closed ...Issue 3 board with strange piggy-back boardIn case you are interested. I?ve never seen something like this before. I have an Issue 3 board here. When I opened the case and found a strange pig…
... links carry 1 (Vcc or 5V) to the same lines -- left ... '157 chips, the only thing missing to implement paging through OUT ...zx spectrum without TR6 (ZTX313)Hi is it possible that a zx spectrum 48 issue 2 works without TR6 (ZTX313)? Should be very interesting.
... base would have been and +12V[/QUOTE]
I know the ... connected to +12V, but I would have thought that +5V would have ... service manual :p so saying +12V here could be another...
Issue 3 board with strange piggy-back boardIn case you are interested. I?ve never seen something like this before. I have an Issue 3 board here. When I opened the case and found a strange pig…
... 16kb chips also have +12V and -5V supplies and if you short ...Issue 3 board with strange piggy-back boardIn case you are interested. I?ve never seen something like this before. I have an Issue 3 board here. When I opened the case and found a strange pig…
... chips and may be also -5V and 12v. You never know whats ...Issue 3 board with strange piggy-back boardIn case you are interested. I?ve never seen something like this before. I have an Issue 3 board here. When I opened the case and found a strange pig…
... of 16kb lower RAM -5v and 12v must be applied before or ... even in same time as 5v ...Issue 3 board with strange piggy-back boardIn case you are interested. I?ve never seen something like this before. I have an Issue 3 board here. When I opened the case and found a strange pig…
... of 16kb lower RAM -5v and 12v must be applied before ... or even in same time as 5v ... power supply feed is the +12V.
So ... okay if the +5V and / or +12V supplies are lost, as ... long as the -5V is ...The Spectrum Resuscitation ThreadKicking off this thread as a place where people who are fixing/restoring Spectrums (or indeed any other piece of related hardware) can show off their…
... , apart from a slightly low -5v (measured -4.65v).
5v/12v generation.
A swift ...First time capacitor replacementHi, I have an Issue 2 board, that i wish to start with recapping as advised on here, as they look to be all original. (Same with V3 board, but going…
... ? I did notice that the +12v to the lower chips is ... ) flowing through a diode. Measure -5V, on pin 8 (the lower ...Issue 3 board with strange piggy-back boardIn case you are interested. I?ve never seen something like this before. I have an Issue 3 board here. When I opened the case and found a strange pig…
... all fine. Means we have -5V, 12V and +5v available there. (I did ...Didaktik Gama and M manualsI?m looking for manuals for the Czech Spectrum clones Didaktik Gama and M. Thought this would be an easy task, but I couldn?t find any user or servic…
By "off the shelf" I mean, buy a ready made PSU with both +5V @ 1A and +12V @ 200mA.
Building a PSU that can produce those outputs is not a problem.
[I][B]Mark[/B][/I]eBay 128K Spectrum RGB cables overheat the Spectrum!?Hi everybody, For a long time I've wondered why Spectrum 128K Toastracks were overheating when using my Retro Computer Shack RGB SCART cable. Today …
... for a TV set then +12V must be obtained from either ... ?s RGB input then +12V or +5V must be obtained from either ...eBay 128K Spectrum RGB cables overheat the Spectrum!?Hi everybody, For a long time I've wondered why Spectrum 128K Toastracks were overheating when using my Retro Computer Shack RGB SCART cable. Today …
... ;732589] I use a 1.5V AA battery for the blanking ... plug into which an external 12V power supply may be connected ... of the input. If a 12V supply is connected then it ...Faulty grey +2, or not?While I?m still fighting with two to three grey +2 computers, which doesn?t give a video signal, I received another grey +2, which acts very strangel…
... side, obviously). So, in a 5V circuit you usually get 16V ... rated caps, in a 12V you put 35V caps etc ...I've had better nights...So I got a broken issue 2 today, case in good nick but the diags board showing multiple failures in both lower/upper RAM. Never mind, good as a spare…
... on stripboard using separate -5V, +5V and +12V rails derived from a more ... powerful PSU (the +5V and +12V capable of 1A and using ...I've had better nights...So I got a broken issue 2 today, case in good nick but the diags board showing multiple failures in both lower/upper RAM. Never mind, good as a spare…
... chip actually works at +12V. The +5V supply is only for the ... one 4116 "routed" either +12V or -5V to a address or data ...I've had better nights...So I got a broken issue 2 today, case in good nick but the diags board showing multiple failures in both lower/upper RAM. Never mind, good as a spare…
... chip actually works at +12V. The +5V supply is only for the ...Some problems with 2 ZX Specturm board'sHi, last week i got some ZX Spectrum stuff. Also 2 ZX Spectrum 48K's, one in the orginal case the anoter one in a DK'tronixs case. Both have problem'…
... and should be -5V +/- 10% (so -5.5V to -4.5V)
[*]Pin ... 8 is VDD and should be +12V ... is VCC and should be +5V +/- 5% (so +4.75V to ...Some problems with 2 ZX Specturm board'sHi, last week i got some ZX Spectrum stuff. Also 2 ZX Spectrum 48K's, one in the orginal case the anoter one in a DK'tronixs case. Both have problem'…
... be seeing approx. -5v on pin 1, +12v on pin 8 and ... +5v on pin 9).
Some problems with 2 ZX Specturm board'sHi, last week i got some ZX Spectrum stuff. Also 2 ZX Spectrum 48K's, one in the orginal case the anoter one in a DK'tronixs case. Both have problem'…
... be seeing approx. -5v on pin 1, +12v on pin 8 and ... +5v on pin 9).< ... because:
1) The +5V is way down, but not ... voltage)
2) The +12V is also way down, much ... blown.
3) The -5V is almost spot-on, which ...Some problems with 2 ZX Specturm board'sHi, last week i got some ZX Spectrum stuff. Also 2 ZX Spectrum 48K's, one in the orginal case the anoter one in a DK'tronixs case. Both have problem'…
Spectrum Missing -5vMy Spectrum is "almost" booting, just when you expect the (C) 1982 Sinclair Research to appear it just displays flashing squares on the screen :( I …
... a machine with no +12V or -5V is to switch out TR4 ...Issue 3 board with strange piggy-back boardIn case you are interested. I?ve never seen something like this before. I have an Issue 3 board here. When I opened the case and found a strange pig…
... are applied to the chips (-5V, 12V and 5V). Also the Diag Board ...Black Screen Spectrum 48kWas working ok, it came to me in a Fuller FDS keyboard, I had a nose inside and found a floating power lead connected to the keyboard, I removed that…
... thing, I slipped off the +5v on the lower RAM chips ... presume put it to the +12v for like .1 of a ... /> Could this be a low +5v problem ?
Edit: tried ...Toastrack poor pictureGot a toaster in that had a blown regulator, after replacing I can "just" about tune it in but its really poor, I can barely make out the menu. Im s…
... chips that need +12V and -5V supplies. The +12V only supplies the video ...
