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Focus Diode · 24th Aug 2016, 10:47 pm

Nice set. Seeing there's a horizontal white line this clearly suggests the line timebase is functioning. Slight lack of width evident on the left which could be due to the feed resistor to the width control changing value. It's a good idea to check the boost volts as if high can seriously shorten the life of the EHT tray. If lack of width persists with the boost voltage correct suspect the scan correction capacitor.

With the frame collapse problem I agree with the comments re checking the panel close to the frame output transformer. Presumably you've tried a new PCL85/805?

What are the voltages around the PCL85/805?

Cheers,
Brian

24th Aug 2016, 10:47 pm	#5
Focus Diode Octode Join Date: Jan 2006 Location: Borough of Gateshead, UK. Posts: 1,420	Re: Ultra 6820 Nice set. Seeing there's a horizontal white line this clearly suggests the line timebase is functioning. Slight lack of width evident on the left which could be due to the feed resistor to the width control changing value. It's a good idea to check the boost volts as if high can seriously shorten the life of the EHT tray. If lack of width persists with the boost voltage correct suspect the scan correction capacitor. With the frame collapse problem I agree with the comments re checking the panel close to the frame output transformer. Presumably you've tried a new PCL85/805? What are the voltages around the PCL85/805? Cheers, Brian Last edited by Focus Diode; 24th Aug 2016 at 10:54 pm.