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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…
... you can test with an oscilloscope.
This is either ... -
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…
... or have access to an oscilloscope, but are there any components ... -
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…
... you can test with an oscilloscope.
This is either ... -
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…
Nice one Ian :D
I'm pretty much stuck with what else to try without an oscilloscope.
Thanks
Mart -
Possibly daft Harlequin composite question... :SHi; My Harlequin Rev. F works fine apart from one aspect: there's no composite out... :( I have checked continuity and the discrete components. I.…
Do have access to an oscilloscope?
[B][I]Mark[/I][/B] -
Possibly daft Harlequin composite question... :SHi; My Harlequin Rev. F works fine apart from one aspect: there's no composite out... :( I have checked continuity and the discrete components. I.…
... go probing for the composite waveform. On the off chance I ... -
Weird 1982 Copyright message after cap change.Hello All, As mentioned before I had a busted Issue 6 48K Spectrum+, one of the capacitors had leaked, and trashed the keyboard membrane ribbon. Us…
... , then you'd need an oscilloscope to progress any further I ... -
Digitised speech using the AY chip?I remember reading somewhere that the AY chip could produce better quality digitised speech than the 48k sampling methods, is there any truth to this…
... simple as reducing an audio waveform to 4 bits as the ... -
Weird 1982 Copyright message after cap change.Hello All, As mentioned before I had a busted Issue 6 48K Spectrum+, one of the capacitors had leaked, and trashed the keyboard membrane ribbon. Us…
... ;797861]you'd need an oscilloscope to progress any further I ... /pico-technology/picoscope-2204a-d2/oscilloscope-2ch-10mhz-100msps/dp/2432914 ... -
Weird 1982 Copyright message after cap change.Hello All, As mentioned before I had a busted Issue 6 48K Spectrum+, one of the capacitors had leaked, and trashed the keyboard membrane ribbon. Us…
... /pico-technology/picoscope-2204a-d2/oscilloscope-2ch-10mhz-100msps/dp/2432914 ... -
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…
... />
Do you have an oscilloscope?
Is the ULA ... -
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…
... all there)
Unfortunately no Oscilloscope (used to have 2 at ... -
New multisystem floppy interface (spectrum 16Kb/+2A/CPC464)Dear all, I would like to show you my new extern floppy interface. Same interface can be used for both, CPC and Spectrum systems. CHARACTERISTICS …
... the logic chips with an oscilloscope, resetting the machine and cataloguing ... -
48K Not booting properlyBought another faulty spectrum from Ebay. This one, when you turn it on, it looks like it's going to boot OK, but when it gets to the point where it…
... the upper RAM with an oscilloscope often reveals which is at ... -
No display on a 128 toastrackHi All, I just bought a 128k off ebay with the usual, "it worked last time I used it", so I read into this "it does not work". True enough, it does n…
[QUOTE=jagman5994;819656]Thanks for replying.
.....
Any more ideas anyone?[/QUOTE]
Use an oscilloscope to check whether the correct sync pulses coming out of ULA. -
No display on a 128 toastrackHi All, I just bought a 128k off ebay with the usual, "it worked last time I used it", so I read into this "it does not work". True enough, it does n…
... =Boleslaw Jamroz;819657]Use an oscilloscope to check whether the correct ... -
No display on a 128 toastrackHi All, I just bought a 128k off ebay with the usual, "it worked last time I used it", so I read into this "it does not work". True enough, it does n…
You really do need an oscilloscope and basic knowledge of how ... -
No display on a 128 toastrackHi All, I just bought a 128k off ebay with the usual, "it worked last time I used it", so I read into this "it does not work". True enough, it does n…
... ) and indirectly microprocessor.
Without oscilloscope is not possible to check ... -
[NEW] Speccy for Android ReleasedHello, All! A while ago, I have released the Android version of [i]Speccy[/i], my ZX Spectrum emulator. It emulates Spectrum 16k, 48k, 128k, +2, +2A…
... used without touchscreen.
* Removed waveform interpolation for more realistic sound ... -
ZX Spectrum issue 6a - yellow border problem<p>Hello!</p><p>I have problem with my Sinclair ZX Spectrum issue 6A, 48K. </p><p>I have changed low memory (all 4116 IC's) and coil, all electrolyti…
... a logic probe or an oscilloscope test the clock input pin ... -
ZX Spectrum issue 6a - yellow border problem<p>Hello!</p><p>I have problem with my Sinclair ZX Spectrum issue 6A, 48K. </p><p>I have changed low memory (all 4116 IC's) and coil, all electrolyti…
@balfordChecked with 2 different working ROMs -> same result. Thanks.@1024MAKI will add reset and post result. I only have multimeter, but I think that I can find oscilloscope, and I will test clock on pin 6 of Z80. Thanks. -
ZX Spectrum issue 6a - yellow border problem<p>Hello!</p><p>I have problem with my Sinclair ZX Spectrum issue 6A, 48K. </p><p>I have changed low memory (all 4116 IC's) and coil, all electrolyti…
... if you could use an oscilloscope.)
My recommendation: Check ... -
ZX Spectrum issue 6a - yellow border problem<p>Hello!</p><p>I have problem with my Sinclair ZX Spectrum issue 6A, 48K. </p><p>I have changed low memory (all 4116 IC's) and coil, all electrolyti…
... you don't have an oscilloscope, try measuring the voltage at ... -
ZX Spectrum issue 6a - yellow border problem<p>Hello!</p><p>I have problem with my Sinclair ZX Spectrum issue 6A, 48K. </p><p>I have changed low memory (all 4116 IC's) and coil, all electrolyti…
... .I don't have an oscilloscope, but I will try to ... -
ZX Spectrum issue 6a - yellow border problem<p>Hello!</p><p>I have problem with my Sinclair ZX Spectrum issue 6A, 48K. </p><p>I have changed low memory (all 4116 IC's) and coil, all electrolyti…
... the diode.
With the oscilloscope you should check the quality ... -
ZX Spectrum issue 6a - yellow border problem<p>Hello!</p><p>I have problem with my Sinclair ZX Spectrum issue 6A, 48K. </p><p>I have changed low memory (all 4116 IC's) and coil, all electrolyti…
... OK.
With the oscilloscope check also the quality of ... -
ZX Spectrum issue 6a - yellow border problem<p>Hello!</p><p>I have problem with my Sinclair ZX Spectrum issue 6A, 48K. </p><p>I have changed low memory (all 4116 IC's) and coil, all electrolyti…
... mind that when using an oscilloscope, the logic levels for "TTL ... />
You should use a oscilloscope rated at 20MHz or higher ... -
ZX Spectrum issue 6a - yellow border problem<p>Hello!</p><p>I have problem with my Sinclair ZX Spectrum issue 6A, 48K. </p><p>I have changed low memory (all 4116 IC's) and coil, all electrolyti…
Thanks for your responses, HZJ and Mark!I will try to find an oscilloscope in next week, and when I do, I will post results here. -
ZX Spectrum issue 6a - yellow border problem<p>Hello!</p><p>I have problem with my Sinclair ZX Spectrum issue 6A, 48K. </p><p>I have changed low memory (all 4116 IC's) and coil, all electrolyti…
Hello!Pictures from oscilloscope (Z80):pin 06:
pin 16,17, 18, 20, 23, 24,25 ,26 (around 5V)
pin 19
pin 21
pin 22
pin 27
pin 28Oscilloscope - Hameg HM103Y (5V scale), X (1us scale).