Brother FAX-931 用户手册
FAX750/FAX770/FAX870MC
FAX860/FAX880/FAX1270T
FAX-910/FAX-920/FAX-921/FAX-930/FAX-931
MFC-925/MFC970MC/MFC1970MCT
Appendix 2. Circuit Diagrams
A. Main PCB
B. Network Control Unit (NCU) PCB
C. Control Panel PCB
D. Power Supply PCB