Service manual

Circuit and electrical block diagram
Item Function Description
1 DC EMI To prevent conduction noise out from DC cable.
2 Boost To regular DC voltage for inverter stage.
3 Full bridge Using four MOSFETs as switch to inverter DC voltage to AC
voltage.
4 Driver board Generator driver signal of full bridge for MOSFETs.
5 Spike killer
board
To kill the spike voltage of inverter diodes for protection purpose.
6 Inverter switch Using four MOSFETs as switch to adjust the polarity of AC voltage.
7 AC EMI To prevent conduction noise out from AC cable.
8 Control board To control all circuit operation under desire.
9 Junction box
(wiring box)
Including AC terminal, DC terminal, AC fuse, DC fuse, and
parameter setting button.
10 Communication
and display
board
1. As a communication bridge between control board and user
(through RJ-45 connector).
2 Display operation status and information.
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