In my latest 7704A, I noticed the chain of nine 300K resistors (R4261 - R4277 and, possibly, R4279) in the CRT circuit have drifted significantly high (~20%) making what should be a total of 2.7M about 3.2M. It's rather obvious they've been running quite warm (discoloring on the PCB) and I'm going to replace them with some breathing room between the new resistors and the board but it got me to wondering what function those provide. I looked over the circuit description and didn't see those mentioned so it made me curious and, perhaps, someone could enlighten me. I presume they're probably a more-or-less standard part of a CRT circuit and that's why they're not called out in the circuit description but not sure.
Thanks,
Barry - N4BUQ
