HMV 902. Replace EHT transformer.

[Geordie McBoyne]

Starting to make sense of the video fault. 'Scope connected to the grid of the CRT. After adjustment a perfect positive going video waveform. Probe transferred to the CRT grid, a sawtooth waveform of 20volts P - P. Where's that coming from? The timebase shows the frame blanking capacitor C5 is connected via R14 to the slider of the brightness control but no line blanking. The timebase chassis will have to come out so that more tests can be carried out.

Geordie McBoyne.