it's my first post on this forum but i follow eevblog since 2 years ago.
my english is not good at all, expecially grammar. i think you should understand.
so, let's speak about this meter
i thinks this is the most insanely simple throubleshooting i've ever ever made.
i've paid this meter about 150€ (200usd).
i've bought it broken with "err 621" "ac rms full scale failed" , but when i've done the auto-test this meter also wrote "err 622" "unable so sense frequency" or something like this, i don't remember.
receive 2 errors it's a great thigs! i've read the service manual and the only component used in all the two test is C301, the big white capacitor in the photos.
i've remove it and replaced it. none, now only err 621 again...
because the error are not the same, first 621, next 621-622 then 621 only again, i've thought "is a mechanical problem!"
so a bit on trouble later i've seen that the pcb trace that go to the cap has a very very very small damage. like a hair.
i've scaped the trace and placed a bit of solder.
and that's all, the most simple word repair! incredible...
now all test are "pass" yeahhhhhh
and it has 35 calibration.... so about one every 4 months, amazing...