Hi all, my name is Norris and I live in South Wales. Just returning to destroying components after a lengthy absence and I purchased a Hameg 203-6 oscilloscope that was sold as not working because it does not focus, there is no response to the knob being turned.I have downloaded the page of the circuit diagram that shows VR402 connected to input G3 on the CRT. Before I start taking it further apart has anyone come across this problem before or have any constructive advice to offer please?