The machine light, silent failure can be caused by switching power supply and scanning circuit fault. Burn F801 confirmed again at the same time, the fault in the power rectifier, filter, adjust or degaussing circuit. RUSservice manual download site
 RUSservice manual download site
(1) unplug the power plug, switch tube collector to ground resistance measurements are only a few, and the pipe resistance is large, to show that the short circuit Q801 before. RUSservice manual download site
 RUSservice manual download site
 RUSservice manual download site
(2) check the rectifier filter circuit, D801, D802, C807 found. D801 a diode breakdown, only after a new half bridge, troubleshooting. RUSservice manual download site
(3) to burn 2 a insurance FSO1 can also be caused by demagnetization circuit short circuit. When check no short circuit for 280 v output, can remove the demagnetizing coil plug, electricity to see if still burn F801 to confirm, if no longer burn F801 after unplug the degaussing coil, thermistors D809 or L801 degaussing coil short circuit. RUSservice manual download site
(4) caused by burning the common faults of insurance: 2 a flow tube D801 D802, filter capacitance C807, degaussing resistance D809, 801 switch tube and other breakdown and short circuit fault.RUSservice manual download site