Epson WF-2540 Service Manual page 43

WF-2540 / WF-2530 / WF-2520 / WF-2510 / WF-2010 series
PIS Board Assy / Star Wheel Holder Assy
Step 2
Secure PIS Shield Plate and CR
Motor together with Main Frame.
Step 6, 7
PIS Shield Plate B
Hole
PIS Shield Plate A Star Wheel Holder Assy
C.B.P-TITE SCREW 3x10 F/ZN-3C (6 ± 1 kgf·cm)
Positioning hole and dowel
C.B.P-TITE 2x8 F/ZN-3C (2.5 kgf·cm)
Hole and hook
C.P SCREW 3x4 F/ZN-3C (4 ± 1 kgf·cm)
PIS Shield Plate B and CR Motor are secured to the Main Frame together.
If the internal thread of the screw hole on the Star Wheel Holder Assy has been damaged, a fatal error may occur because the PIS Board Assy is
detached due to vibrations during transportation or the like. When securing the PIS Board Assy with the screw, first turn the screw CCW and
align the thread of the screw and the internal thread of the screw hole on the Star Wheel Holder Assy, then tighten the screw securely.
Do not touch the sensor of the PIS Board Assy.
Do not use air-blowing when cleaning the PIS Board Assy. If the board is dirty with ink or similar, wipe it off using a waste cloth.
When installing the PIS Board Assy / Star Wheel Holder Assy, follow the procedure below.
1. Insert the section A of the PIS Shield Plate B into the hole of the Frame Base.
2. Secure the PIS Shield Plate B using the screw together with the CR Motor and Main Frame.
3. Connect the PIS FFC to the connector on the PIS Board Assy, and then align the dowels (x2) of the PIS Board Assy with the positioning hole and
cutout of the Star Wheel Holder Assy.
4. Secure the PIS Board Assy with the screw while pressing it to the rear of the printer and supporting the Star Wheel Holder Assy with your hand
so as to prevent it from warping.
5. Route the PIS FFC and connect it to the Main Board.
6. Align the positioning holes (x2) on the PIS Shield Plate A with the dowels (x2) on the Star Wheel Holder Assy, and engage the hole on the PIS
Shield Plate A to the hook on the Star Wheel Holder Assy, then attach the PIS Shield Plate A to the Star Wheel Holder Assy.
7. After confirming the sensor of the PIS Board Assy is set out from the hole on the PIS Shield Plate A, secure the PIS Shield Plate A/B and Star
Wheel Holder Assy together with the screw.
Disassembly/Reassembly
Step 1
Section A
PIS Shield Plate B
Frame Base
Star Wheel Holder Assy
Step 3
Sensor
Dowel and cutout
Step 4
(p 50)
Detailed Disassembly/Reassembly Procedure for each Part/Unit
Reflector PIS Assy
Reflector PIS Assy
Hole
CR Unit
Do not remove the Reflector PIS Assy from the Reflector PIS
Holder.
When handling the Reflector PIS Assy, be careful not to
contaminate or damage the Reflector PIS.
When attaching the Reflector PIS Assy to the CR Unit, confirm the
Reflector PIS Holder cannot be seen through the hole on the
bottom of the CR Unit. Otherwise, the Reflector PIS Assy has not
been installed correctly, so make sure to install the Reflector PIS
Assy properly again.
PIS Board Assy
CR Scale Cover Frame
Turn it
CCW.
Rib
PIS FFC
Cutout
80-digit side
Inset rib.
Align cutout.
When installing the CR Scale Cover Frame, install the CR Scale Cover Frame to the Main Frame following the standard below and tighten the screw
in the procedure below.
80-digit side
• Align the protrusions of the Main Frame with the cutout of the CR Scale Cover Frame.
• Insert the rib of the CR Scale Cover Frame to the hole of the Main Frame.
0-digit side
• Insert the rib of the CR Scale Cover Frame to the hole of the Main Frame.
Reflector PIS Holder
Extension spring
Reflector PIS
Bottom
Reflector PIS
Slit of CR Encoder Sensor
Reflector
PIS Holder
CR Unit
Attach the CR Scale to the hook on the left of the Main Frame
with the black triangle mark upward.
Make sure to put the CR Scale through the slit of the CR
Encoder Sensor.
CR Scale Cover Frame
Main Frame CR Scale Cover Frame
Rib
3
2
Revision B
CR Scale
Cut Section
CR Scale
0-digit side
1
Inset rib.
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