S
Stefan Huebner
- Jan 1, 1970
- 0
Dear community,
my HP 54200A has just left me. I need to use a analog Hameg scope now
for designing a vector network analyzer, just to give an idea of my
situation
What has happened? U33, one of the seven EPROMs gets quite hot and my
universal programmer says the chip is defective, address lines shorted
to ground and so on. As there are probably different version of the
firmware, I'd like to replace the whole set.
My cry: If anyone out there has a 54200A (model 2511A) sitting around
and dares to pull the CPU board to read the 27128 chips, I would be
very thankful I know that there may be another problem, probably
the calibration data was corrupted or something. But I'd like to give
it a try first and then eventually go deeper into its guts. I've
already traced the schematics of the CPU board because the service
manual I've ordered only contains the power supply schematics (don't
tell me you have a manual with complete schematics
regards
Stefan Huebner
my HP 54200A has just left me. I need to use a analog Hameg scope now
for designing a vector network analyzer, just to give an idea of my
situation
What has happened? U33, one of the seven EPROMs gets quite hot and my
universal programmer says the chip is defective, address lines shorted
to ground and so on. As there are probably different version of the
firmware, I'd like to replace the whole set.
My cry: If anyone out there has a 54200A (model 2511A) sitting around
and dares to pull the CPU board to read the 27128 chips, I would be
very thankful
I know that there may be another problem, probablythe calibration data was corrupted or something. But I'd like to give
it a try first and then eventually go deeper into its guts. I've
already traced the schematics of the CPU board because the service
manual I've ordered only contains the power supply schematics (don't
tell me you have a manual with complete schematics
regards
Stefan Huebner
