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One more grey +2 with video problemsI guess I need your help again to hopefully be able to do some proper troubleshooting myself one day. Here I have a grey +2, which could be a bottom…
... resistance between +12V and ground (probe both legs of C41), and ... between -12V and ground (probe both legs of C22). Then ... -
One more grey +2 with video problemsI guess I need your help again to hopefully be able to do some proper troubleshooting myself one day. Here I have a grey +2, which could be a bottom…
... , press the red and black probe against its two terminals, and ... , press the red and black probe against upper left and right ... -
ZX Spectrum 48k - no CLK signalHello I'm trying to repair ZX Spectrum 48 mainboard issue 3B. When i check signal with oscilloscope on X1 or on ULA pin 39. I get stable 2V no clock…
...
Make sure your probe doesn't load down the ... -
ZX Spectrum 48k - no CLK signalHello I'm trying to repair ZX Spectrum 48 mainboard issue 3B. When i check signal with oscilloscope on X1 or on ULA pin 39. I get stable 2V no clock…
... =Zorn;735269]Make sure your probe doesn't load down the ... a correctly adjusted 10:1 probe :)
Do you get ... -
ZX Spectrum 48k - no CLK signalHello I'm trying to repair ZX Spectrum 48 mainboard issue 3B. When i check signal with oscilloscope on X1 or on ULA pin 39. I get stable 2V no clock…
... 'm using 1/10 oscilloscope probe.
X1 is ok. I ... -
Tricky ZX RepairHello guys, This time I put my hands on a very nice Issue 3 16K, upgraded to 48K. To bertter explain "nice", it is absolutely mint, not a scratch on…
... even think about them. Will probe them this evening and look ... -
using the raspberry pi for the zx spectrumI just saw where they are now using a Pi to emulate a floppy disk drive for the Amiga. So it got me wondering if this could be done for the ZX Spectr…
... Allen belts for deep-space probe links?
Or maybe how ... -
Toasted +3Oops.. I shorted one of my +3 (being clumsy with multimeter, doh) when measuring PSU connector pins :D Any immediate guesses what exactly died on thi…
... to the Z80 with a probe there. I know winston killed ... -
Toasted +3Oops.. I shorted one of my +3 (being clumsy with multimeter, doh) when measuring PSU connector pins :D Any immediate guesses what exactly died on thi…
... to the Z80 with a probe there. I know winston killed ... -
Toasted +3Oops.. I shorted one of my +3 (being clumsy with multimeter, doh) when measuring PSU connector pins :D Any immediate guesses what exactly died on thi…
... , if you shorted your DMM probe from +12V to somewhere other ... -
Toasted +3Oops.. I shorted one of my +3 (being clumsy with multimeter, doh) when measuring PSU connector pins :D Any immediate guesses what exactly died on thi…
... you put the live DMM probe, all chips are suspect to ... -
Toasted +3Oops.. I shorted one of my +3 (being clumsy with multimeter, doh) when measuring PSU connector pins :D Any immediate guesses what exactly died on thi…
... you put the live DMM probe[/QUOTE]
I read ... with the tip of a probe, in which case I can ... -
Toasted +3Oops.. I shorted one of my +3 (being clumsy with multimeter, doh) when measuring PSU connector pins :D Any immediate guesses what exactly died on thi…
... with the tip of a probe, in which case I can ... -
Toasted +3Oops.. I shorted one of my +3 (being clumsy with multimeter, doh) when measuring PSU connector pins :D Any immediate guesses what exactly died on thi…
... to be shorted by a probe I'd have thought. The ... -
Toasted +3Oops.. I shorted one of my +3 (being clumsy with multimeter, doh) when measuring PSU connector pins :D Any immediate guesses what exactly died on thi…
... />
Put your black meter probe to the metal chassis of ... end especially for a 0v probe so you can clip onto ... without having to balance a probe or try to hold two ... -
Toasted +3Oops.. I shorted one of my +3 (being clumsy with multimeter, doh) when measuring PSU connector pins :D Any immediate guesses what exactly died on thi…
... an inexperienced person put their probe on the wrong pad? No ... short caused by a single probe? I'm reading this as ... two probe tips, one on the 5V ... -
Toasted +3Oops.. I shorted one of my +3 (being clumsy with multimeter, doh) when measuring PSU connector pins :D Any immediate guesses what exactly died on thi…
... short caused by a single probe? I'm reading this as ... two probe tips, one on the 5V ... -
Toasted +3Oops.. I shorted one of my +3 (being clumsy with multimeter, doh) when measuring PSU connector pins :D Any immediate guesses what exactly died on thi…
... end especially for a 0v probe so you can clip onto ... -
Toasted +3Oops.. I shorted one of my +3 (being clumsy with multimeter, doh) when measuring PSU connector pins :D Any immediate guesses what exactly died on thi…
... contact point of the multimeter probe actually is.
2. Therefore ... -
Settings on oscilloscope to see composite video signalHello, Learning a bit more about my new Owon digital 2 chan. oscilloscope. Would like to know what settings I should use to view a composite signal…
... an oscilloscope as a logic probe. Would this be looking at ... -
Settings on oscilloscope to see composite video signalHello, Learning a bit more about my new Owon digital 2 chan. oscilloscope. Would like to know what settings I should use to view a composite signal…
... an oscilloscope as a logic probe. Would this be looking at ... -ground the input, stick the probe on the point you wish ... -
Settings on oscilloscope to see composite video signalHello, Learning a bit more about my new Owon digital 2 chan. oscilloscope. Would like to know what settings I should use to view a composite signal…
... -ground the input, stick the probe on the point you wish ... -
New CPU and Spectranet oddity.I have no reason to suspect this problem is due to a fault/poor design of the Spectranet, but understanding what it does at system initialisation may…
... the capacitance of the scope probe is enough to make it ... -
Please explain how a Kempston interface circuit works.Can someone help me understand how a Kempston joystick interface works, as I want to design and build my own as an experiment. I understand switches…
... or better) or a logic probe that has a pulse detector ... -
IF1bis StabilityI just thought I would start a different thread relating to the IF1bis, and leave the copyrighters to it elsewhere...:-P I've had mine for a few mon…
... bit of capacitance your scope probe adds promptly makes the problem ... -
New CPU and Spectranet oddity.I have no reason to suspect this problem is due to a fault/poor design of the Spectranet, but understanding what it does at system initialisation may…
... -TR3. I used a x100 probe to minimise loading and an ... -
IF1bis StabilityI just thought I would start a different thread relating to the IF1bis, and leave the copyrighters to it elsewhere...:-P I've had mine for a few mon…
... bit of capacitance your scope probe adds promptly makes the problem ... -
Joy pad controllers for spectrumI want to know if anyone knew if there was any joypad controllers out there for the spectrum +2. I am usless at using a joystick and as i used ot us…
... my Comp Pro and Cheetah Probe joysticks (yet), but gaming has ... -
Shopping on AliExpress - is it safe?Hi guys i would like to hear if any of you have made any purchases on this site: [url]http://www.aliexpress.com/[/url] ? The reason i ask is that i …
... /> The seller with the Logic Probe as a 98.2% positive ...
