Estun drive maintenance
Model: EDB-10A
Failure phenomenon: no display
Fault analysis: Estun AC servo driver is running in the customer said suddenly no display, the motor does not turn. Open the cover to check the key circuit board, power driver board power supply and fan. Ming found no traces of burned out. But the circuit board copper corrosion. Some estimation of the servo used in harsh environment, power on detection of 5V output is only 0.6V, no problem. Check the feedback circuit rectifier tube, the switch is also no problem. But found the switch damaged. Change boot failure persists, continue to find the reasons. Because of the power supply for the multi output. Other groups have suspected load short circuit. Then disconnect all load. The fault still. Finally concluded as the switch transformer. The transformer coil welding under the open, found the innermost layer, the primary windings are short-circuit. Due to a primary short circuit, destroyed the oscillation conditions so 5V output voltage is very low, there is a re wound transformer for display. Client installed to run all normal.
Common faults of Hong Jia Wei Estun server: no display, lack of phase, overcurrent, overvoltage, undervoltage, overheating, overload, grounding, parameter error, display no output can be repaired.
Jia Hong Wei repair service hotline: 0755-28916839, 13640994287 Shaw