A method for testing an optical disc drive control PCB using a test jig featuring a reference optical pick-up head. The method includes steps for measuring an output of the reference optical pick-up head (OPU) laser, comparison of the OPU output to the output of an optical disc drive control PCB under...http://www.google.com.tw/patents/US7107171?utm_source=gb-gplus-share專利 US7107171 - Production procedure with PCB calibration
