so today i spended an other day again at the 54845A project.
i decided to have a look at the display to see if there is the reson from my flickering LCD and yes ...1 very small connector was not connected on the LCD side. So pulled apart the front and see if it is fixable...ah reconnect and see if the LCD is working. Yes strange but ok.. fixed.
Time to build the mule back together.. and see what happens with the selftest and when that shows many "PASSED" i can go on to the Calibration part and see what is happening there.
i decided to put all Hybrids back in and then bring it to life…
so after a while when the mule looked a bit like a scope again...it is time for power on and selftest. I long while ago i already decided to disconnect the Original harddrive because i don t want to damage or delete usefull history data.
So already on het start of this project i took a 20GB maxtor drive and restored the 4.3 software version using a extra CDROM drive connected to the second IDE port from the VA-503A which i needed to load bios defaults to get the second IDE back to life again. Ater that i restored like the procedure explained howto reinstall the scope. with the #VIN033 first restore was software version 4.3 and then upgrade to version 4.5. so i ended up with a new installed drive leaving the Original in tact.
after booting i got the calibration needed message .. and as i told 2 posts back my error was definitely gone. i connected a keyboard and mouse and now it is time for the selftest… with all hybrids reinstalled again…
after powering on first thing i saw was i got 3 good triggered signals ch2/ch3/ch4 and my channel 1 trigger signal was gone..
next step "the selftest"...
A to D convertor and FISO error. all errors were in the first few tests and somewhere a warning that the Attentuators contacts were totally out limited…Attentuators needs to be replaced...
of course why should the mule would work already in one time. of course not...