Power Supply Insulation Sheet, Battery Cover (Rear Cover S), And Backup Battery - Brother MFC4820C Service Manual

6.1.4 Power Supply Insulation Sheet, Battery Cover (Rear Cover S), and Backup Battery

The battery cover and backup battery are for the MFC4820C, and the rear cover S for the
MFC4420C.
(1) Remove the power supply insulation sheet.
(2) While pressing the battery cover (rear cover S) in the direction of arrow
and rear in the direction of arrow
(3) MFC4820C: To replace the backup battery, plug the power cord into an outlet, disconnect the
battery harness from the main PCB, and remove the backup battery. Connect a new backup
battery to the main PCB and then unplug the power cord.
NOTE: If you disconnect the battery harness with the power cord unplugged, you will lose the
settings (e.g., calendar clock, voice messages, and received FAX data) stored in the RAM on
the main PCB.
If you need to remove the main PCB (without replacing it with a new one) in the following
disassembly jobs, take the backup battery out of the machine once and connect the battery
harness to the main PCB without routing it through the opening provided in the lower cover.
Reassembling Notes
• When connecting the battery harness to the main PCB, pass it above other harnesses so that you
may disconnect it easily by pulling it from the outside of the machine. Refer to Section 6.1.15
"Routing of the Harnesses and Flat Cables A."
.
Main PCB
Lower cover
Backup battery*
6-16
, slide it to the left
Power supply insulation sheet
Hook
* Provided on the MFC4820C
** Provided on the MFC4420C
Battery cover*
Rear cover S**