Chapter 3 Disassembly And Assembly; Safety Precautions - Brother HL-S7000DN Service Manual

CHAPTER 3 DISASSEMBLY AND
1.

SAFETY PRECAUTIONS

To avoid creating secondary problems by mishandling, follow the warnings and precautions
below during maintenance work.
Caution:
- Be careful not to lose screws, washers, or other parts removed.
- Be sure to apply grease to the gears and applicable positions specified in this chapter.
- When using soldering irons or other heat-generating tools, take care not to accidentally
damage parts such as wires, PCBs and covers.
- Static electricity charged in your body may damage electronic parts. When transporting
PCBs, be sure to wrap them in conductive sheets.
- When replacing the PCB and all the other related parts, put on a grounding wrist band and
perform the job on a static mat. Also take care not to touch the conductor sections on the
flat cables or on the wire harness.
- After disconnecting flat cables, check that each cable is not damaged at its end or short-
circuited.
- When connecting flat cables, do not insert them at an angle. After insertion, check that the
cables are not at an angle.
- 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.
- 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.
- After an assembly, recommend the operation of "dielectric strength voltage check" and
"continuity check".
- When replacing the heavy parts such as the carriage unit and the platen unit, perform the job
by two workers or more and by firmly fixing the replacement parts.
If they are not installed correctly in the designated position, the frame might be deformed,
resulting in an operation failure.
ASSEMBLY
3-1
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