H HSter New Member Apr 21, 2009 #1 First, Happy Earth day to every1! Can you help me with what functions the preset (variable) resistors do on the circuit board for an APC Back-UPS 600? Last edited: Apr 21, 2009
First, Happy Earth day to every1! Can you help me with what functions the preset (variable) resistors do on the circuit board for an APC Back-UPS 600?