tattoo machines won't function properly?why?

I have some experience about maintenance tattoo machines fault and share it with you,i hope will be helpful to you. 1 .elastic rod without meeting inclined promptly contact. Solution: the elastic rod screws loosen the elastic rod rotating down, run into contact, then rotate 180 ° to 360 °, tighten the screw locking elastic rod. 2 .the power switch is not opened. Solution:Turn on 220 v alternating current (ac), after open the tattoo machines power switch, indicator light red. 3 .adjusting button (VOLTAGE) on the zero position, and V table pointer on the zero . solution: adjust the button clockwise rotate slowly, also in V table pointer rotation, V table pointer should be parked in the 10 V to 12 V. Promptly contact before. 4 .elastic rod touch, touch is too tight, don't start, is more likely to have the power supply circuit, a power switch, the indicator light is light green, no voltage . solution: the elastic rod screw loosening, the elastic rod up loose from the shrapnel contact reset elastic rod encounter on contact, rotate 180 ° to 360 ° tattoo machines power tripping circuit, indicating the light is green, the switch to open, indicating the light is red. 5 .at work, often accidentally also don't know when to pull the power cord, the position of the left joint . Solution: check the pedal switch, the power cord plug to have in place after. 6 .in the work, cleaning and disinfection of tattoo machine, the machine line ruptured the (dislocation). solution: check the thrum of the tattoo machines for dislocation (break), to find an electrician, open the line welding on . 7. power tripping indicating the light is green . Solution: check the plug on the power cord and plug on the tattoo machines foot switch to have broken, broken may touch line (short), breaking the thread, to use electric welding, with respect to OK!