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N_Cook

On 08/11/2016 13:29, wrote:
On Tuesday, November 8, 2016 at 7:21:17 AM UTC-5, N_Cook wrote:

Much Snippage

Questions:

a) What is the actual resistance in ohms of the OEM fan and the replacement fan if measured across the contacts.
b) Have you changed the bad resistor yet? If not why not?
c) Same question of measured resistance on the lower current fan that does not trip into protection mode?

Suggestions:

a) Replace all the out-of-spec resistors with correct replacements. Think long and hard before upping the wattage if there is any chance that the resistor may also act as a fuse under extreme conditions.
b) Perhaps a small thermistor on the fan line might reduce the overload trip - meaning that what the fan pulls running may be much less than what it takes to start it.

Interesting but I don't know what it tells me, a VDR or some thyristor
cct, start-up hold-off, in the working ones?
Working .08 and OEM .14A ones higher than 10M DVM-R
0.15A 19.3K , DVM-R
and .2A 19.9K

I'll recheck but i think the fan comes on when the relay clicks over, so
not as though the fan is kept out of circuit when the SMPS first starts
up. Even then a pretty light load, even in the sense of start-up
current, or could that current be an amp or more for a mS or so