Acer AC501 AC501 Monitor Service Guide - Page 26
about 15V/40V
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Page 26 highlights
B-3. No Vertical Defl ection ( Rester Become A Horizontal Line) No vertical deflenction Yes Check U601 Pin 2 about 15V/40V PIN 4 about -12VD C Yes Check U401 Pin 12, 13 output saw-tooth w a v e fo rm Yes Check U601,D601 Yes C heck D .Y. No Check No R601, R605 Check power supply circuit No Check U401 26