Dahao E620 main board,CPU board.

  Match with dahao Becs-322 computer.

More dahao embroidery computer boards here :
  (1):322 series: E620(main card),E9102(power supply card),MCB card,ms-01(stepping motor driver) head card
  (2):328 series: E600(main card),E721(power supply card),E734,E733,E9102
   (3):216,226,266 series:E879(main card),E733,E734,PW18(Power supply card),EF165(sequin DIP Card),EF168(sequin controlling card),EF190(upper thread driver card),ms21(stepping motor driver),EF119(Needle position card),E871/E874(coiling signal transfer card) etc
   (4):dahao main card/main board: E9101B,E950,E808,E850,E860,E866,E870,E901.
   (5):dahao power supply board:
E9102,6BPB,E721,E733,E734,PW07,PW07,PW09A,PW10,PW11,PW17,PW17A,EF108
   (6):Dahao needle position detecting board: ZWB
   (7): dahao needle position encode board:
  DXYMB-9,EF104B,EF119A,EF133A
   (8):Dahao thread break detecting board:
   EF110b,EF120b,EF154d,EF154a,EF170,EF176
   (9):Dahao under thread detecting board:
    EF103D,EF117A
   (10):dahao special controlling board:
    MCB(main shaft control board),EF732k(frequency conversion control board),EF148E(sequin control board),EF168D(sequin control board)
   (11)others:
   EF165(sequin signal transfer board),E903D(signal transfer   board),E806(communication board),E861a(communication   board),E722b(frequency,multiplication board).