Brother MFC-9420CN Service Manual page 12

APPENDIX 5 WIRING DIAGRAM
APPENDIX 6 CIRCUIT DIAGRAMS
NCU PCB (U.S.A. model)
NCU PCB (Europe, Oceania, Asia model)
NCU PCB (Japanese model)
POWER SUPPLY PCB 100V, 127V
POWER SUPPLY PCB 240V
APPENDIX 7 VIEWING THE EVENT LOG FILE
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