Epson DREAMIO EH-TW2900, Service Manual

Page: 47 / 107

EH-TW3500/4500/5500 Disassembly and Assembly CONFIDENTIAL
SEIKO EPSON 47 Revision A
3.1 Precautions
This section describes cautions before starting disassembling and assembling this
product. Make sure to read the precautions below before starting.
3.1.1 General Cautions in operation
General cautions for disassembling and assembling this product are provided below.
Cautions for each procedure are provided in its corresponding section. Make sure to
refer to them before starting.
In this chapter, the models are categorized into two group
according to the mechanical differences, and named generally as
shown in
“ 1.1 About Model Names (p10)” .
Do not touch the lamp assy. or the parts around it. They are extremely hot even
after completed the cooling down operation, and may cause a burn injury.
Therefore, leave the unit until it becomes cool enough before performing
maintenance work.
„
Do not disassemble any components (such as the power supply unit) which
do not have express disassembly procedures described in this Service
Manual.
„
The Optical Engine, the circuit boards and the Loader Assy. are very
sensitive to static electricity. Be sure to place them inside static-proof bags
once they have been removed from the projector.
„
The Optical Engine is very sensitive to vibration and shocks, so handle it
with care.
„
The speaker unit contains a permanent magnet, so keep it away from any
storage media such as floppy disks and magnetic cards.
„
Be careful not to drop a metal part such as a screw, a washer, or a clip into
the inside of the product. If such cases should occur accidentally, never
turn on the power supply until all the dropped parts are found and
removed.
„
When carrying out any of the following operations, check that there is no
dust or dirt on the respective components or on any glass surfaces before
installation. If any contamination is found, clean it off using isopropyl
alcohol.
• Optical Engine removal
• Lamp assembly removal
• Air filter removal
„
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.
„
After reassembling the product, check the followings before turning the
power on.
• All the parts and screws are installed and secured to the proper positions.
• No cables are caught in the metal frames.
„
When replacing or disassembling, do not re-use old heat-resistant tape that
secures cables inside the projector, but make sure to use new one.