Precautions Which Must Be Taken When Servicing; Safety Precautions - Epson EMP-822 Service Manual

4.1.2 Precautions which must be taken when servicing

The precautions given below must be always observed whenever you disassemble/reassemble
the projector to maintain the quality. In addition, make sure to observe the WARNING and
CAUTION precautions given in each section which describe disassemble/reassemble
procedure of each unit or component in this chapter.
When the projector is disassembled, the dust in and around parts (such as the fans and air
filter) may get transferred to other parts such as the R, G and B light valves which are the
central part of the display mechanism. This may have an adverse effect on the quality of
projected images. Accordingly, be sure to check whether any of the parts are dusty or dirty,
and use a vacuum cleaner to clean them first before carrying out disassembly work.
The Optical Engine and the circuit boards are very sensitive to static electricity. Place them
inside static-proof bags once they have been removed from the projector.
When carrying out any of the following operations, check that there is no dust or dirt on the
respective components or on any
and glass surfaces before installation. If any such contamination is found, clean it off using
isopropyl alcohol.
• Optical Engine removal
• Lamp assembly removal
• Air filter removal
The speaker unit contains a permanent magnet, so keep it away from any storage media
such as floppy disks and magnetic cards.
The Optical Engine is very sensitive to vibration and shocks, so handle it with care.
Do not disassemble any components (such as the power supply unit) which do not have
express disassembly procedures described in this Service Manual.

4.1.3 Safety precautions

For safety purpose, and to protect the product from damage, the precautions given below must
always be observed.
1. Disconnect the power cable from both the projector and the electrical outlet.
2. Disconnect any interface cables from the projector.
3. Always wear gloves when disassembling and reassembling the projector.
4. Use static discharge equipment such as anti-static wrist straps when accessing internal
components to protect sensitive electronic components and circuitry.
5. Remove any metallic objects such as wristwatches, shirt cuff buttons, rings and tie pins
which may pose a danger of coming into contact with the projector.
6. Before disassembling the projector, make sure to clean any dust or dirt on the air filter,
interface section and outer case using a vacuum cleaner or other method.
SEIKO EPSON
EMP-822/EMP-83/EMP-X5/EMP-S5
4-3 Revision:A