2 Oct
2013
2 Oct
'13
1:50 a.m.
On Tue, 1 Oct 2013, Holm Tiffe wrote:
I've repaired the PCB but the parts are still
getting hot in standby,
because standby no fan is running..
Have you thoroughly checked the electrolytics? I.e. capacitance *and* ESR?
I recently had the same phenomenon where some parts of a small SMPS were
getting very hot although the load was low. After checking the caps, I
found some that still had their full capacitance, but the ESR was about
0.9-1.2 ohms. A new cap with otherwise same values has 0.02 ohms. I
changed them, and since then, the PS is much cooler.
Christian