Brother International HL-1660E Service Manual - Page 48

CHAPTER IV MECHANICAL SYSTEM Safety Precautions To prevent the creation of secondary problems by mishandling, observe the following precautions during maintenance work. (1) Always turn off the power before replacing parts or units. When having access to the power supply, be sure to unplug the power cord form the power outlet. (2) Be careful not to lose screws, washers, or other parts removed for parts replacement. (3) Be sure to apply grease to the teeth of gears. (4) When using soldering irons and other heat-generating tools, take care not to damage the resin parts such as wires, PCBs, and covers. (5) Before handling the PCBs, touch a metal portion of the equipment to discharge static electricity, or the electronic parts may be damaged due to the electricity charged in your body. (6) When transporting PCBs, be sure to wrap them in conductive sheets such as aluminum foil. (7) Be sure to reinsert self-tapping screws correctly, if removed. (8) Unless otherwise specified, tighten screws to the torque values listed below. • Tapping screws S tight M3 : 7kgf • cm B tight M3 x 6 M3 x 8 : 5kgf • cm : 7kgf • cm • Stepped screws M3 M4 : 7kgf • cm : 10kgf • cm (9) When connecting or disconnecting cable connectors, hold the connector bodies not the cables. If the connector has a lock, always slide the connector lock to unlock it. (10) After repairs, check not only the repaired portion but also that the connectors and other related portions function properly before operation checks. Notes • On the next page is a disassembly order flow which helps you access the object component. • Unless otherwise specified, the disassembled parts or components should be reassembled in the reverse order of removal. IV - 1