Hello again,
This time, i have an issue with another board, again, bought faulty, fixed a few traces, and all working again, but the calendar just wont tick when running the diagnostics.
I have replaced the crystal, as well as the D4990 chip, as both had signs of corrosion, but still nothing.
I have found that pins 3-5 on the F0 chip, all remain low for some reason.
So my question is, do the F0 chips fail, or does the F0 chip, get its signals for the RTC from somewhere else?
Weird thing is, that after i did all the repairs, the calendar worked (for about 15 minutes until power off), then all of a sudden, nothing.
Any ideas?
This time, i have an issue with another board, again, bought faulty, fixed a few traces, and all working again, but the calendar just wont tick when running the diagnostics.
I have replaced the crystal, as well as the D4990 chip, as both had signs of corrosion, but still nothing.
I have found that pins 3-5 on the F0 chip, all remain low for some reason.
So my question is, do the F0 chips fail, or does the F0 chip, get its signals for the RTC from somewhere else?
Weird thing is, that after i did all the repairs, the calendar worked (for about 15 minutes until power off), then all of a sudden, nothing.
Any ideas?