Panasonic FP-D250 User Manual page 75

• Using a vacuum cleaner for the cleaning of the TDC sensor could cause
electrostatic damage, therefore, use a blower brush or cotton swab for the
cleaning of these parts. Before vacuuming the developer unit remove the TDC
sensor.
• When handling the drum, the precautions listed in section
with consumables" should be followed.
• Make sure to use the correct screw sizes.
• Use toothed lock washer for the installation of ground wires to secure electrical
continuity.
• To re-assemble, reverse the sequence of disassembly, unless otherwise stated.
• Blown fuses should only be replaced with fuses of the specified rating.
4 Precautions for handling lasers
The laser optical system employed by this photocopier is completely sealed by
a protective housing and an external cover. Therefore, the laser beam will not
stray or leak during photocopier use. However, when servicing the photocopier,
take the following precautions:
1. Do not insert into the path of the laser, any screwdrivers or other tools that
have high reflectance properties.
2. Before servicing the photocopier, take off any watches, rings, or other metallic
objects that you may be wearing. (This is to avoid the danger of the laser
entering the eye by reflecting off the metallic object being worn.)
Since the laser beam cannot be seen with the naked eye, please follow the
above precautions for maximum safety.
5 The safety interlock switches
• The service technician may defeat the safety interlock switches by inserting a
interlock cheater into the opening of the switch cover.
• Be sure to remove the interlock cheater from the switch cover after completion
of service.
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1.9 "Precautions