HP 4951A Repair - trips the mains

hp4951arepairtripsthemains5.jpg

A pic of the CRT connections. This instrument was built at a time when HP still built the CRT HT and related circuits, unlike later instruments which used CRTs and boards from various manufacturers e.g. Sony. Tough luck if one of those OEM boards quit, as HP does not have the schematics!

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