This machine by lightning fault, 3 without boot Q901 examination revealed the power main vibration tube and power supply IC have been damaged, change new boot found after 110 v mains voltage cannot be established, the multimeter measuring ac voltage of 320 v or so after the rectification, shut down after the voltage drops slowly, the power of the this kind of phenomenon shows that this machine can't start up, has nothing to do with the load. Coarse power part of the resistance capacitance and diode are not found the problem, after careful analysis of circuit, suspect that there might be some different capacitance C905 or C911, pursuit of the capacitor will be removed by capacitance table testing, found C905 capacity of only 2.9 UF, the original capacity should be 4.7 UF, the capacitance change new, commissioning, troubleshooting. CZwservice manual download site
 CZwservice manual download site
 CZwservice manual download site
This machine power supply for tandem switching power supply, mainly is the main purpose of C905 vibration tube Q901 provide instant on base flow, when the capacitance decrease, because cannot provide enough the eight current circuit can not start up normally.CZwservice manual download site