Toshiba e-Studio477s, Service Manual, Page: 4 / 482

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.
- 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.
- Do not leave plastic bags where children can get at them. This may cause an accident such as
suffocation if a child puts his/her head into a bag. Plastic bags of options or service parts must be
brought back.
- There is a risk of an electric shock or fire resulting from the damage to the harness covering or
conduction blockage. To avoid this, be sure to wire the harness in the same way as that before
disassembling when the equipment is assembled/disassembled.
3. General operations
- Check the procedures and perform as described in the Service Manual.
- Make sure you do not lose your balance.
- Avoid exposure to your skin and wear protective gloves as needed.
4. 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 explosion or burnout. Avoid short-circuiting and do not use parts not
recommended by Toshiba TEC Corporation.
Caution: Before using the antistatic wrist strap, unplug the power cable of the equipment and
make sure that there are no charged objects which are not insulated in the vicinity.