Initial test voltages on pg 23 of KPA100 manual test points are off, where to start troubleshooting? U1 pin15 = 5.53v should be 0, pin20=0v should be 5v, pin27=0v should be 5.8v, pin28=0v should be 5.7v, Also U4 pin11 = 0v should be 5v, U6 pin6=4.96v should be 0-.5v. All other pins test within appropriate ranges. Any help is appreciated. Ed