Hi,
I am restoring a 5103ND11 with a 5A18N vertical amplifier. Now the device is working. I heard a "stock" and the 200V fuse was blown. After many checks I discovered that the +200 line is overloaded (but no low resistance can be measured on it). In a short: if I cut the +200V trace on the 5A18, the scope is still working, but without the lights on the panel and making the main fuse to blow.
It seems simple to fix ...but the 5A18N should not use the 200V, according the schematic. Maybe mine piece of equipment is older than the schematic. Has someone the schematic with the 200V for the lights, please?
Thanks