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'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…
... took out TR4.
Voltages are likely to be out ... />
Replace TR4 (again), test voltages to ensure you've got ... -
'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…
... the 5v, -5v and 12v voltages are present.
Either ... -
'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…
... , where do I test the voltages... would this be on the ... -
'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…
Not a problem :)
1024MAK provided a useful guide to where the voltages are measured lately, to be found [URL="http://www.worldofspectrum.org/forums/showthread.php?t=48725"]here[/URL]. Have a look and let us know what you find.
B -
48K Ram Check Command not workingI am trying to repair my Spectrum 48k. It is having issues loading games, sometimes they load all the way to launch and then the speccy resets. Oth…
... /> Could you also check the voltages on one of the lower ... you can verify that all voltages are correct.
B -
48K Ram Check Command not workingI am trying to repair my Spectrum 48k. It is having issues loading games, sometimes they load all the way to launch and then the speccy resets. Oth…
Ok, voltages on the lower ram all seem to check out fine.
Are the lower ram chips that flakey that I have killed one in the process of changing an upper ram chip? -
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…
... including changing out TR8 & TR9 for some faster transistors (2N4401 ... -
Poorly Issue One 16k spectrum diagnosis?Hello, everyone. :smile: I was lucky enough to buy an Issue One 16k rubber key the other week; I didn't know it was an Issue One till I opened it up…
While testing voltages for the 4116s I managed to short something and have blown the RAM and TR4. Gah! Back to square one! Just as well I have spares... -
Were +2A tape decks badly made?I remember as a kid in the early 90s(must of been as I started Secondary School in 1994 and this was before that) maybe even 88 or 89 I used to play …
... supply to supply several different voltages needed for those models, hence ... -
'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…
... IC's, replace TR4, check voltages, replace TR5 if necessary. Change ... -
Giving up on SpectrumsHi all... Bit of a downer post here... I'm really close to giving up on Spectrums.. My 48k has given me nothing but head aches since day one... and …
... - rule #1 - Thou shall check voltages
Is the PSU ... -
Were +2A tape decks badly made?I remember as a kid in the early 90s(must of been as I started Secondary School in 1994 and this was before that) maybe even 88 or 89 I used to play …
... supply to supply several different voltages needed for those models, hence ... -
'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…
... IC's, replace TR4, check voltages, replace TR5 if necessary. Change ... -
Spectrum sometimes boots with graphic issuesA while ago, my Spectrum 48K (issue 3B) broke down after fiddling with a brand new joystick interface in combination with DivIDE. Today I tested the …
Check the voltages of the lower memory, +5v, -5v, +12v. -
'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…
Help with 128k greyHello friends, need some help here on try fixing a +2 grey spectrum128. To keep it short, opened the case and the voltage regulator was missing, the …
... the machine running to check voltages, touching lightly the pin revealed ...Modern PSUHello everyone, I'm looking for a modern PSU for my Spectrums and my dual set of 3.5'' floppy drive+HxC floppy emulator. The one for Spectrum should …
... it to select between different voltages?
[/QUOTE]
Switch ...Modern PSUHello everyone, I'm looking for a modern PSU for my Spectrums and my dual set of 3.5'' floppy drive+HxC floppy emulator. The one for Spectrum should …
... Spectrum as all the supply voltages are there (+12, +5, -5Vetc ...How important is the 9V line?I'm in the middle of resurrecting an Opus Discovery. The transformer is gone so Im using a small switched mode PSU from a PC. My plan is to bypass …
... feed the board with two voltages, 12 & 5V. Then I ...Pics of your Speccy set-up?Had a look and can't seem to find a thread on this. - Be interesting to see pic(s) of everyone's "go-to" Speccy, the one that they use regulary. I'…
... differences in TVs and power voltages here in the States make ...Short Circuit Damage?Hey Spectrum fans, Currently trying to diagnose what is wrong with my 48K Issue 4B ZX Spectrum. The initial problem was the fact it would not boot -…
... multimeter on Pin 16, the voltages were:
Pin 1 ...Short Circuit Damage?Hey Spectrum fans, Currently trying to diagnose what is wrong with my 48K Issue 4B ZX Spectrum. The initial problem was the fact it would not boot -…
... /> After renewing TR4, measure the voltages on one of the 4116 ...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…
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…
... = TR1, TR2, TR3, TR6, TR8, TR9
ZTX 653 = TR4, TR7 ...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…
... to say "Thou shall test voltages", but you now what? I ...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…
... with a picture of the voltages (Marks?) but I still always ...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…
... diodes (etc)
Test voltages taken at various points from ... information on "Thou shall test voltages" - it's one thing to ...Pics of your Speccy set-up?Had a look and can't seem to find a thread on this. - Be interesting to see pic(s) of everyone's "go-to" Speccy, the one that they use regulary. I'…
... differences in TVs and power voltages here in the States make ...Weird symptom number 2...I got a new keyboard membrane for my Spectrum+ plugged it in and low and behold the weird left to right printing of the copyright message disappeared…
... />
Also are the supply voltages okay during the "wild" times ...Weird symptom number 2...I got a new keyboard membrane for my Spectrum+ plugged it in and low and behold the weird left to right printing of the copyright message disappeared…
... by side and measure the voltages of each pin on the ...
