New repair article - HP 3456A DMM worklog.
Published: Oct. 29, 2015, 10:45 a.m.
Detailed article from TEKTRON is ready. Enjoy repair and modifications progress.
Repair progress update on HP 3458A
Published: Oct. 11, 2015, 1:19 p.m.
Digital domain and DC PCBA are fixed. Was working and passed selftest, but failed after a day of use.