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CHAPTER 4

SAFETY PRECAUTIONS

To avoid creating secondary problems by mishandling, follow the warnings and precautions below

during maintenance work.

(1) Always turn off the power switch and unplug the power cord from the power outlet

(2) Some parts inside the printer are extremely hot immediately after the printer is

(1) Be careful not to lose screws, washers, or other parts removed.

(2) Be sure to apply grease to the gears and applicable positions specified in this chapter.

(3) When using soldering irons or other heat-generating tools, take care not to accidentally

(4) Before handling any PCBs, touch a metal portion of the equipment to discharge any static

(5) When transporting PCBs, be sure to wrap them in the correct protective packaging.

(6) Be sure to replace self-tapping screws correctly, if removed. Unless otherwise specified,

(7) When connecting or disconnecting cable connectors, hold the connector body, not the

(8) After a repair, check not only the repaired portion but also all connectors. Also check that

fineline6

DISASSEMBLY AND RE-ASSEMBLY

before accessing any parts inside the printer.

used. When opening the front cover or rear cover to access any parts inside the

printer, never touch the red colored parts shown in the following figures.

CAUTION:

damage parts such as wires, PCBs and covers.

electricity charge on your body, or the electronic parts or components may be damaged.

tighten screws to the following torque values.

TAPTITE, BIND or CUP B

M3: 0.7N m

M4: 0.8N m

TAPTITE, CUP S

M3: 0.8N m

SCREW

M3: 0.7N m

M4: 0.8N m

cables. If the connector has a lock, release the connector lock first to release it.

other related portions are functioning properly before operational checks.

MFC-8440/8840D/8840DN, DCP-8040/8045D/8045DN

WARNING

SERVICE MANUAL