Alright, back on topic.
Yey, it's alive...Well, it powers on with donor A5. However, it would be too easy to repair, don't get happy too fast. See that ERR?
I guess we lucky again, dreaded ERR 114 haunting us in this box too. Last time that eaten over 200 hours... Not expecting this to be any easier, while still there is a hope that issue somewhere not in U180. But chances are slim.
It's a
balanced rundown convergence, not the multislope rundown convergence one, which I had most issues with.
Any measurement with slow slope speeds fail faster than a second. NPLC 0.001 works, so we know what to do.
ST fails ofcourse, instantly after 10V test. Can't read 10VDC gain/timeouts.
For further tests another donor A3 was used, so we can check other boards first. With that board we can get some readings on input signals, such as 5VDC and 5VAC.
But on 100VAC and 1kVAC ranges it reads junk:
Resistance checks:
Current checks:
Somebody still believed in miracles and was thinking it would be easy 2-evenings fix?
Can't be so naive.