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User name Jack (Techs)
Log entry time 08:44:44 on May 13, 2008
Entry number 237904
keyword=Right Q1 work yesterday (05-12-08)
Scot replaced the 1k ohm current limiting resistor on the lower
output contactor solenoid. The resistor had aged and burnt out.
Scot also replaced a spade lug connector that had considerable
corrosion on it. He found the corrosion to be mostly on the surface
of the lug, likely residue from the plastic sleeving burning off.
The indication of the failure was the power supply making a loud
repetitive clunking, as the contactor was constantly cycling closed
and open. The resistor on the upper contactor had previously been
replaced and looked in good shape. Upon inspection of the Left Q1
supply we found the resistor on the lower contactor to be in good
shape. Scot had replaced that one in august 2005. The signs of
corrosion on a spade lug there seemed to be the same as Scot
remembered from before. So, we assume no further problem with it.
The resistor on the upper contactor was showing some signs of age.
The replacement resistors require a different mounting bracket, so
we decided to put the replacement of the upper resistor on the list for
the summer down; not try to replace it now. Scot found some brackets
in the spares drawer and assembled two resistors in them.