Brother 431B Sewing Machine User Manual


 
8. ELECTRIC MECHANISM
-. Connectors
Most of the machine trouble is due to connector problems including improper connection or sufficient contact.
Therefore, be sure to check if each connector is correctly inserted and that there is no contact failure between
pins and wires before starting troubleshooting procedures.
--. Connector positions
Outside of the control box
For foot switch
3588Q
Main ci
rcuit board
3589Q
KE-430B, 430C series
140