Hi,
I've been trying to debug the digital display section of my HP 853A (with an 8559A plugin). The analogue display seems to be OK.? I've been through signature analysis and it looks like either the U34 ROM chip is faulty of else the image is corrupted since the signatures are wrong on this particular chip (although I'm not entirely sure the ROM image numbers match between my hardware and the manual I have downloaded).
I can't seem to find an image on the web. Does anybody have/know of/send me a ROM image for the 853A?
many thanks
Tony
