Oki MB760 Service Manual page 5

2. General Precautions at Service
- Be sure to turn the power OFF and unplug the power cable during service (except for the
service should be done with the power turned ON).
- Unplug the power cable and clean the area around the prongs of the plug and socket outlet
once a year or more. A fire may occur when dust lies on this area.
- When the parts are disassembled, reassembly is the reverse of disassembly unless
otherwise noted in this manual or other related documents. Be careful not to install small
parts such as screws, washers, pins, E-rings, star washers, harnesses in the wrong places.
- Basically, the equipment should not be operated with any parts removed or disassembled.
- The PC board must be stored in an anti-electrostatic bag and handled carefully using a
antistatic wrist strap since the ICs on it may be damaged due to static electricity.
Caution: Before using the antistatic wrist strap, unplug the power cable of the equipment
- Be sure not to touch high-temperature sections such as the fuser unit and areas around
them.
- Be sure not to touch high-voltage sections such as the chargers, transfer belt, developer,
high- voltage transformer, and power supply unit. Especially, the board of these
components should not be touched since the electric charge may remain in the capacitors,
etc. on them even after the power is turned OFF.
- Make sure that the equipment will not operate before touching potentially dangerous places
(e.g. rotating/operating sections such as gears, belts pulleys, and fans).
- Be careful when removing the covers since there might be the parts with very sharp edges
underneath.
- When servicing the equipment with the power turned ON, be sure not to touch live sections
and rotating/operating sections.
- Use designated jigs and tools.
- Use recommended measuring instruments or equivalents.
- Return the equipment to the original state and check the operation when the service is
finished.
- Be very careful to treat the touch panel gently and never hit it. Breaking the surface could
cause malfunctions.
3. Important Service Parts for Safety
- The door switch, fuse, thermostat, thermofuse, thermistor, batteries, IC-RAMs including
lithium batteries, etc. are particularly important for safety. Be sure to handle/install them
properly. If these parts are short-circuited and their functions become ineffective, they may
result in fatal accidents such as a burnout. Avoid short-circuiting and do not use parts not
recommended by OKI DATA Corporation.
45641001TH Rev.1
and make sure that there are no charged objects which are not insulated in the
vicinity.
Oki Data CONFIDENTIAL
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