Brother Facsimile Equipment MFC7420 - Manual (Page 120)

Confidential 5 -4 9
5.1.19 Main PCB
< DCP7010/7020/7025, MFC7420 >
(1) Disconnect the thirteen connectors from the main PCB.
(2) Remove the five cup S M3x6 taptite screws and FG harness ASSY 6.
(3) Remove the two flat S M3x8 taptite screws.
(4) Remove the main PCB from main frame L.
NOTE: When replacing the main PCB, refer to ‘ADJUSTMENTS AND UPDATING OF
SETTINGS, REQUIRED AFTER PARTS REPLACEMENT’ in Chapter 6 .
Main PCB
Taptite flat S M3x8
Taptite cup S M3x6
Taptite cup S M3x6
FG harness ASSY 6
Main frame L
1
2
HVPS connector
(It has been taken back.)
Polygon motor connector
(LV harness ASSY)
New toner sensor connector
LD harness 5P
connector
Main PCB
Speaker connector
NCU connector
Cover sensor connector
LVPS connector
Fan motor 60 unit connector
Thermistor relay harness
Main motor connector
Battery connector
Control panel connector