Epson Stylus Pro 7700 Service Manual page 168

Epson Stylus Pro 7700/7710/7700M/7710M/7900/7910/9700/9710/9900/9910/WT7900/WT7910/9890/9908/7890/7908
The power switch for this printer is installed on the secondary
W A R N I N G
side of the power circuit; therefore, the power is always
supplied unless the AC Cable is unplugged. To prevent electric
shock and circuit damage during servicing, make sure to follow
the instructions below.
Before removing a circuit board, make sure to unplug the
•
AC Cable from the AC outlet and confirm the LEDs are
turned off by pressing the Power button on the Operating
Panel. This operation discharges the residual charge in the
printer.
Make sure not to place the removed circuit boards on the
•
metal and such directly.
Always wear gloves for disassembly and reassembly to avoid
injury from sharp metal edges.
Never touch the ink or wasted ink with bare hands. If ink comes
into contact with your skin, wash it off with soap and water
immediately. If irritation occurs, contact a physician.
If ink gets in your eye, flush the eye with fresh water and see a
doctor immediately.
When powering this product, high-voltage current may be
applied on the following parts/components. To prevent
ELECTRIC SHOCK, do not touch the parts/components when
the power is ON. If the shock should happen, the flowing
current is very tiny, about a few hundreds μA, therefore it will
not do any harm on the human body.
Ink System Unit (Flushing Box)
•
Power Supply Board Assy
•
AID Board
•
When replacing the Main Board, Power Supply Board, or
Power harnesses and such, make sure to check visually if any
harness is caught in between or any wrong connection exists.
DISASSEMBLY & ASSEMBLY
Make sufficient work space for servicing.
C A U T I O N
Locate the printer on a stable and flat surface.
The ink-path-related components or parts should be firmly and
securely reinstalled on the printer to prevent the ink from
leakage.
Use only recommended tools for disassembly, assembly or
adjustment of the printer.
When using compressed air products; such as air duster, for
cleaning during repair and maintenance, the use of such
products containing flammable gas is prohibited.
Apply lubricants and adhesives as specified.
Be careful not to soil the printer or the floor with the leaked ink
when removing the ink-path-related components or parts.
Spread a sheet of paper or cloth on the floor in advance.
Do not touch electrical circuit boards with bare hands as the
elements on the board are so sensitive that they can be easily
damaged by static electricity. If you have to handle the boards
with bare hands, use static electricity discharge equipment such
as anti-static wrist straps.
When reassembling the printer, make sure to connect the
connectors of the electric components or parts correctly and
securely. Use extreme care when connecting FFCs (flexible flat
cables). Improper connection of the FFCs, such as inserting
them diagonally into the connectors, could cause short-
circuiting and lead to breakdown of the electric elements on the
boards.
When reassembling the printer, make sure to route the FFCs
and other cables as specified in this chapter. Failure to do so
may cause an unexpected contact of the cables with sharp metal
edges, or lead to lower the noise immunity.
When the printer has to be operated with the covers removed,
take extra care not to get your fingers or clothes caught in
moving parts.
When you have to remove any parts or components that are
provided as after-service-parts but are not described in this
chapter, carefully observe how they are installed and make
sure to remember it before removing them.
Overview
Revision I
168
Confidential