Epson L120 Service Manual page 36

L120
Align the screw holes of Main
Frame and PF Motor Frame.
3
5 Section A
Main Frame
1
PF Motor Frame
 Before installing the Main Frame Assy, shift the Change Lever back to the rear.
 When installing the Main Frame Assy, make sure of the following.
• The Change Lever must not interfere with the Main Frame.
• The above shown ribs and grooves, positioning holes and dowels are correctly aligned.
• The section A of the Main Frame Assy is not deformed.
 Tighten the screws in the order indicated in the figure above.
PF Encoder Sensor / PF Scale
PF Scale
Do not reuse the removed PF Scale and make sure to replace it with a new one when removing it.
When installing the PF Scale, it is pressed into the PF Roller, therefore, the removed one is deformed. If it is re-installed to the printer, it does not
rotate properly and the paper feed accuracy may be reduced.
The PF Encoder Sensor cable which connects the PF Encoder Sensor and the Main Board cannot be removed solely because it is soldered on them. If
the PF Encoder Sensor should be removed, make sure to remove it together with the Main Board.
 When installing the PF Scale to the PF Roller, press the PF Scale into the PF Roller vertically.
 After installing the PF Encoder Sensor, confirm the PF Scale does not touch the PF Encoder Sensor.
Disassembly/Reassembly
Main Frame Assy
Main Frame Assy
Tighten screw while pressing Main
Frame in the direction of the arrow.
2
Change Lever must not
C.B.P-TITE SCREW 3x10 F/ZN-3C (6 ± 1 kgf·cm)
interfere with Main Frame.
C.B.S-TITE SCREW 3x6 F/ZN-3C (6 ± 1 kgf·cm)
PF Encoder Sensor
PF Encoder Sensor
PF Roller
PF Roller
Detailed Disassembly/Reassembly Procedure for each Part/Unit
4
Main Frame
CR Driven Pulley Assy
Rib and groove If the CR Timing Belt has to be replaced, it is necessary to extend the new CR Timing Belt by the tension of the Compression Spring 13.98 in
Positioning hole and dowel advance. If the CR Timing Belt is replaced without doing this extension process, misalignment of the belt or print failure may occur. Therefore, make
sure to follow the assembling procedure when installing the CR Timing Belt.
When installing the CR Driven Pulley Assy and CR Timing Belt, follow the procedure below.
1. Install the CR Driven Pulley Assy to the Main Frame.
2. Attach the Compression Spring 13.98 in the order from the dowel on the CR Driven Pulley Assy to the rib on the Main Frame.
3. Attach the CR Timing Belt to the CR Driven Pulley Assy.
4. Attach the CR Timing Belt on the pinion gear of the CR Motor while pushing the CR Driven Pulley Assy to the 0-digit side.
5. Wait five minutes for CR Timing Belt to be extended by the tension of the Compression Spring 13.98.
6. Secure the CR Driven Pulley Assy wit the screw.
Step 1-2
Hole of
Frame Base
Pump
Tube A
Route Pump Tube A through ribs of Frame
Base with their dashed line facing upward.
PF Scale
When installing the Pump Unit, follow the procedure below in order to prevent ink suction failure.
1. Route the Pump Tube A through the hole of the Frame Base.
2. Install the Pump Unit to the Frame Base, and route the Pump Tube A through the ribs of the Frame Base with their dashed line facing upward.
3. Secure the Pump Unit to the Frame Base with the screw (x1).
4. Route the Pump Tube B through the ribs of the Pump Unit and Frame Base, and insert it to the hole of the Frame Base up to the marking
(8 1 mm from tube end).
±
CR Driven Pulley Assy / CR Timing Belt
Main Frame
Rib
Dowel
Compression Spring 13.98
Pump Unit
Pump Unit
Step 3
Frame Base
Revision A
Pinion gear of CR Motor
CR Timing Belt
C.P.S-TITE (S-P1) SCREW 3x6 F/ZN-3C (7 ± 0.5 kg·fcm)
Step 4 Pump
Tube B
8 ± 1 mm
Marking
Hole of Frame Base
Insert Pump Tube B up to the marking (8 ± 1 mm
from tube end) to the hole of Frame Base.
Rib
C.B.P-TITE SCREW 3x10 F/ZN-3C (6 ± 1 kgf·cm)
36
Confidential