Chapter Iii Disassembly And Reassembly; Safety Precautions - Brother HL-820 Service Manual

CHAPTER III DISASSEMBLY AND REASSEMBLY

1.

SAFETY PRECAUTIONS

To avoid creating secondary problems by mishandling, be careful to follow the following
precautions during maintenance work.
(1) Always turn off the power switch and unplug the power cord from the power outlet
before accessing any parts inside the printer.
(2) Be careful not to lose screws, washers, or other parts removed.
(3) Be sure to apply grease to the gears and applicable positions specified in this
chapter.
(4) When using soldering irons or other heat-generating tools, take care not to
accidentally damage parts such as wires, PCBs, and covers.
(5) Before handling any PCBs, touch a metal portion of the equipment to discharge
any static electricity charge on your body, or the electronic parts or components
may be damaged.
(6) When transporting PCBs, be sure to wrap them in the correct protective packaging.
(7) Be sure to replace self-tapping screws correctly, if removed. Unless otherwise
specified, tighten screws to the following torque values.
(8) When connecting or disconnecting cable connectors, hold the connector body, not
the cables. If the connector has a lock, release the connector lock first to release
it.
(9) After a repair, check not only the repaired portion but also all connectors. Also
check that other related portions are functioning properly before operational
checks.
TAPTITE, BIND or CUP B
M3 : 7kgf • cm
M4 : 10kgf • cm
TAPTITE, CUP S
M3 : 8kgf • cm
SCREW
M3 : 7kgf • cm
M4 : 8kgf • cm
III-1