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Issue 3b boarddiode ID5 and cap C47 are missing from my board will these have any effect on system powering up. I have checked the voltages on the 7508 and its …
I will take one today at some point, I desoldered one leg and measured it and yes the multimeter is a crap one but definitely a 330 on the meter -
Harlequin Rev GI have just got all the bits to build an Harlequin Rev G system and I went for a red solder mask board. I have fitted the 3 surface mount components…
... [/quote]If you have a multimeter, testing on the resistance range ... -
Harlequin Rev GI have just got all the bits to build an Harlequin Rev G system and I went for a red solder mask board. I have fitted the 3 surface mount components…
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that's what the multimeter shows for each in on ... -
12V ripple with lower ram installedI repaired a speccy this week. Before doing anything I replaced all caps and measured the transistors in the power section. When doing this I found t…
C50 should never get warm. How good is the external power supply? Test using either an ossillscope or a multimeter (test both DC voltage AND AC voltage) while connected to the Spectrum.
[b][i]Mark[/i][/b] -
Opus Discovery "the big switch on" (after 20 years)I have a few of these Opus Discovery's with different Eproms in that have not been swiched for 15-20 years or so . I am in no rush to switch any on …
... ' edgeconnector. By means of a multimeter. Measure 'in both directions' by ... -
Recommend Cassette PlayerI've not needed to buy one for about 30 years so can anyone recommend a new cassette recorder and source please? Do they even make them anymore?
... open circuit fault with a multimeter on the resistance range. You ... -
Opus Discovery "the big switch on" (after 20 years)I have a few of these Opus Discovery's with different Eproms in that have not been swiched for 15-20 years or so . I am in no rush to switch any on …
... wire being the same . A multimeter continuity test appears to show ... -
Faulty M1 or no?Hi all, OK, so I've got an issue 4B which was pretty much untouched and appears to work fine (starts up OK, loads games, 23732 and 23733 both retu…
... scope but do have a multimeter.
Thanks in advance ... -
What's the best solution for audio loading on a 48k?I have three 48k Speccies. All have been recapped and AV modded, but only one (an issue 4A) is currently loading via Teezix. (the other two (issue 3…
The[url="http://www.maplin.co.uk/p/35mm-mono-plug-to-35mm-stereo-socket-adapter-fk14q"] Mono adaptor I mentioned[/url] seems to short left and right together, according to my multimeter. -
What's the best solution for audio loading on a 48k?I have three 48k Speccies. All have been recapped and AV modded, but only one (an issue 4A) is currently loading via Teezix. (the other two (issue 3…
... right together, according to my multimeter.[/quote]Which is fine when ... -
Not bored with the Boards.Going through some old tapes stored rather badly I came across an unlikely item that that I must have stored away quickly with other low grade items …
... signs of life on a multimeter. 4) And one , the last ... -
Not bored with the Boards.Going through some old tapes stored rather badly I came across an unlikely item that that I must have stored away quickly with other low grade items …
Re above pic of No 4 Power Supply
This one has 2 16v 2200uf capacitors . It gave a voltage reading of 13.53 volts with a multimeter and powers up a 48k Spectrum OK -
Not bored with the Boards.Going through some old tapes stored rather badly I came across an unlikely item that that I must have stored away quickly with other low grade items …
... ? And it DOES give a multimeter reading as well as an ... -
Opus Discovery "the big switch on" (after 20 years)I have a few of these Opus Discovery's with different Eproms in that have not been swiched for 15-20 years or so . I am in no rush to switch any on …
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Have you got a multimeter with continuity test function? If ... -
Black screen on 48k+Hello peeps Just bought a 48k+ was working fine then after leaving it off over night I turned back on to get a total black screen, no border etc. …
... the supply voltages with a multimeter, preferably a good digital one ... you are using a digital multimeter, connect the negative lead (black ... -
ZX-Uno moddingStarting with ZX-Uno case modding I have not yet received my ZX-Uno yet (it is in the post) but I know that I will have to do at least one mod …
... range(s) (ohms) on a multimeter.
Pin 21 on ... -
ZX-Uno moddingStarting with ZX-Uno case modding I have not yet received my ZX-Uno yet (it is in the post) but I know that I will have to do at least one mod …
... and a half digit digital multimeter to check. The actual results ... -
Spectrum +2 Grey internal cassette connectorIs it possible to buy the internal white cassette connector (the bit with pins on the motherboard and the bit that dangles from the leads) from Mapli…
... sell it.
A multimeter on continuity or a low ... -
ZX-Uno moddingStarting with ZX-Uno case modding I have not yet received my ZX-Uno yet (it is in the post) but I know that I will have to do at least one mod …
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If you have a multimeter around, you can easily test ... -
ZX-Uno moddingStarting with ZX-Uno case modding I have not yet received my ZX-Uno yet (it is in the post) but I know that I will have to do at least one mod …
... the two ends of the multimeter . Sounds a great idea if ... -
ZX-Uno moddingStarting with ZX-Uno case modding I have not yet received my ZX-Uno yet (it is in the post) but I know that I will have to do at least one mod …
... .
As for the multimeter, it's not so hard ... -
Need some help repairing an issue 3 spectrumI am looking for some help repairing an issue 3 speccy, here's what I tried so far. The speccy is not booting up correctly, when using the diagnos…
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Have you used a multimeter on the 200 ohm range ... -
48K Issue 2 Spectrum showing exactly 16KI've acquired an issue 2 and it quickly became clear that only 16K of memory is available. I've read that some early 48K Spectrums with malfunctionin…
... 's best to use a multimeter on the 200 ohms range ... -
Upper memory issueZX Spectrum 48K, issue 2, boots fine. Lower RAM OK. When tested with the new test ROM in the Diagboard, for all upper RAM tests "FAIL" is shown. I…
... pins testing good on a multimeter (using continuity range) to adjacent ... -
Composite video ghost image on ZX Spectrum 128K +2Hi, I have a ghost image on the composite video out on my ZX Spectrum 128K +2 and have run out of ideas of what could be wrong. Does anybody have a…
... continuity test mode on the multimeter and thought the RGB pins ... -
+2A PSU ResurrectionHi all. I have a couple of +2A machines and a +3 with PSUs for each but I'm having a problem with one of them. I've replaced the internal glass…
It might be a blown voltage regulator or diodes. Do you know a little about electronics and have a multimeter with continuity test function? -
+2A PSU ResurrectionHi all. I have a couple of +2A machines and a +3 with PSUs for each but I'm having a problem with one of them. I've replaced the internal glass…
I'm a bit sketchy if I'm honest; I know the basics and I do have a multimeter though. What should I be prodding? ;-) -
+2A PSU ResurrectionHi all. I have a couple of +2A machines and a +3 with PSUs for each but I'm having a problem with one of them. I've replaced the internal glass…
... and I do have a multimeter though. What should I be ... -
+2A PSU ResurrectionHi all. I have a couple of +2A machines and a +3 with PSUs for each but I'm having a problem with one of them. I've replaced the internal glass…
... measure this by poking your multimeter probes into the end of ... -
+2A PSU ResurrectionHi all. I have a couple of +2A machines and a +3 with PSUs for each but I'm having a problem with one of them. I've replaced the internal glass…
... measure this by poking your multimeter probes into the end of ...
