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Old 20th Aug 2021, 10:09 pm   #8
SiriusHardware
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Join Date: Aug 2011
Location: Newcastle, Tyne and Wear, UK.
Posts: 11,482
Default Re: ZX Spectrum Issue 2 / new TVs

Evening Colin, nice to have you back. As we recall, you have a scope. Power the Spectrum on and try scoping the wires which rise up from the PCB and pass through the side of the modulator can. One of those should have a video waveform on it.

You need to be sure that video waveform is present before you set about trying to do the composite mod, otherwise you may have a fault somewhere further back.
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