Epson 4880 C Service Manual

							EPSON Stylus Pro 4400/4450/4800/4880/4880CRevision CDisassembly & Assembly Disassembly Procedures 261
Install Mount Assy., Plate, Motor, ASF, SP following the 
steps below.
1. Combination Gear 12, 22.4 may fall from the Mount 
Assy., Plate, Motor, ASF, SP when removing it. If this 
happens, properly install the gear as shown below.
2. Install Mount Assy., Plate, Motor, ASF, SP in a way that 
avoids interference between Combination Gear 12, 
22.4 and Spur Gear, 18.Combination Gear 12, 22.4Spur Gear, 18
Location of Interference
3. Insert shaft of frame while aligning it with installation 
hole of Mount Assy., Plate, Motor, ASF, SP.
4. Confirm that Spur Gear, 19.2 and Combination Gear 
13.6, 28.8 are engaged.
Shaft
Installation Hole
Combination Gear 13.6, 28.8
Spur Gear, 19.2
Gear Engagement 
Location 
						

							EPSON Stylus Pro 4400/4450/4800/4880/4880CRevision CDisassembly & Assembly Disassembly Procedures 262
5. Tighten screws so that there are no gaps at the locations 
listed below.
•Between frame and Heat Dissipation Plate, Motor, 
ASF.
•Between frame and Mount Assy., Plate, Motor, ASF, 
SP.





Be sure to refer to Chapter 5  “Adjustment” (p.366) and 
perform specified adjustments after replacing the Mount 
Assy., Plate, Motor, ASF, SP.
C.B.S. 3x6
Confirm close fit of 
components
Heat Dissipation 
Plate, Motor, ASF 
						

							EPSON Stylus Pro 4400/4450/4800/4880/4880CRevision CDisassembly & Assembly Disassembly Procedures 2634.2.6.4  ASF Phase Sensor1.Remove Cover, Side, Left (p216).
2. Remove the four screws securing Cover, Motor, PF and then remove 
Cover, Motor, PF in the upward direction while avoiding the Roller, PF. 
(Refer to Figure 4-72.)
„C.B.S. 3x6: 4 pcs.
3. Rotate Lever, Hopper, Release with hand and align the Wheel, Detector 
notch with the ASF Phase Sensor detection section.
(Refer to Figure 4-73.)
Figure 4-72. Cover, Motor, PF Removal
Figure 4-73. Wheel, Detector Removal Position
1
2
Cover, Motor, PF
Roller, PF
 C.B.S. 3x6
 C.B.S. 3x6
ASF Phase Sensor
Notch and 
Detection Section
Wheel, Detector
Lever, Hopper, Release 
						

							EPSON Stylus Pro 4400/4450/4800/4880/4880CRevision CDisassembly & Assembly Disassembly Procedures 264 4. Use a tool such as a precision screwdriver to press down on and release 
the hook securing the Wheel, Detector, and remove the Wheel, 
Detector. (Refer to Figure 4-74.)
5. Disconnect the connector from the ASF Phase Sensor.
(Refer to Figure 4-75.)
6. Release the two tabs securing the ASF Phase Sensor and remove the 
ASF Phase Sensor.
(Refer to Figure 4-75.)
Figure 4-74. Wheel, Detector Removal
Figure 4-75. ASF Phase Sensor Removal
Hook
1
2
2
11
Connector
Tabs 
						

							EPSON Stylus Pro 4400/4450/4800/4880/4880CRevision CDisassembly & Assembly Disassembly Procedures 2654.2.6.5  ASF Paper Sensor1. Remove PCB Unit. (Refer to 4.2.4.1 C593 MAIN Board (p226).)
2. Release ASF Paper Sensor harness from clamp.
3. Release the two tabs securing ASF Paper Sensor and then release ASF 
Paper Sensor.
4. Disconnect connector from ASF Paper Sensor.
Figure 4-76. ASF Paper Sensor Removal
ClampHarness
ASF Paper Sensor
Connector 
						

							EPSON Stylus Pro 4400/4450/4800/4880/4880CRevision CDisassembly & Assembly Disassembly Procedures 2664.2.7  Carriage Mechanism4.2.7.1  Carriage Unit1.Remove Scale, CR (p281).
2.Remove C593_SUB Board (p234).
3. Remove the two screws that secure the Ink Tube Unit. 
(Refer to Figure 4-77.)
„C.B.P. 3x12: 2 pcs.
4. Tilt the Ink Tube Unit backward to release the three tabs securing its 
bottom ( ), and then lift and remove the Ink Tube Unit( ).
(Refer to Figure 4-78.)Figure 4-77. Screws Securing Ink Tube Unit
Figure 4-78. Releasing Tabs on the Bottom of Ink Tube Unit
	


This section explains the working procedure using the CR 
SUS PLATE SUPPORT TOOL shown in the figure below.
The CR SUS PLATE SUPPORT TOOL is a tool that holds 
and fixes the SUS plate which is on the CR guide shaft to 
prevent it being deformed or damaged by the bearing 
installed in the Carriage Unit when installing/removing the 
Carriage Unit to/from the CR shaft. Use the CR SUS PLATE 
SUPPORT TOOL in any way possible.
CR SUS PLATE SUPPORT 
TOOL (1400023)
C.B.P. 3x12
Ink Tube Unit
1
2 
						

							EPSON Stylus Pro 4400/4450/4800/4880/4880CRevision CDisassembly & Assembly Disassembly Procedures 267
When installing the Ink Tube Unit, be sure to check the 
followings.
„Release the Belt, CR tension (Refer to 4.2.7.2 Motor 
Assy., CR (p270).), and sandwich the Belt, CR with the 
Carriage Unit and the Ink Tube at between the two 
red lines marked on the reverse side of the belt. If the 
belt is sandwiched at the right position, a bending will 
appear between the two red lines.  
„Do not get harnesses sandwiched between the Ink Tube 
Unit and the Carriage Unit.
„Securely hitch the three tabs of the Ink Tube Unit to the 
installation holes of the Carriage Unit.
Red lines
„Match the two positioning holes and the two dowels of 
the Ink Tube Unit and Carriage Unit.
„The Ink Tube Unit should be installed with its 
mounting plate facing forward.
Ground Plate 
						

							EPSON Stylus Pro 4400/4450/4800/4880/4880CRevision CDisassembly & Assembly Disassembly Procedures 268 5. Remove the Tension Spring, 3.81 from the hooks of both the Head Unit 
and the Lever, Inclination. (Refer to Figure 4-79.)
6. Remove the three screws and the washer that secure the Lever, 
Inclination to the Carriage Unit to remove the Lever, Inclination. 
(Refer to Figure 4-79.)
„C.B.P. (P2) 3x12: 2 pcs.
„C.B.P. 3x8 (+washer 3.0x0.5x8):1 pc.
7. Remove the screw securing the Head Unit to the Carriage Unit.
(Refer to Figure 4-80.)
„C.B.P. (P2) 3x12: 1 pc.
8. Release the harness from the tab shown in Figure 4-80, and move the 
Carriage Unit toward you.
9. Lift the Head Unit together with the Ink Tube Unit to remove from 
theCarriageUnit. (Refer to Figure 4-81.)
Figure 4-79. Lever, Inclination RemovalFigure 4-80. Removal of Screw Securing Head Unit
Figure 4-81. Head Unit Removal
C.B.P. (P2) 3x12
Extension  Spring, 3.81
C.B.P. 3x8 
+washer 3.0x0.5x8
A
B
C
Lever, Inclination
When installing the Lever, Inclination, follow the steps 
below.
1. Tighten the Screw A.
2. Attach the Extension  Spring, 3.81.
3. Tighten the Screw C first and then the Screw B.
C.B.P. (P2) 3x12
Tab
Head Unit 
						

							EPSON Stylus Pro 4400/4450/4800/4880/4880CRevision CDisassembly & Assembly Disassembly Procedures 269 10. Set the CR SUS PLATE SUPPORT TOOL on the both sides of the 
Carriage Unit as shown in Figure 4-82.
Place the CR SUS PLATE SUPPORT TOOL with the left end of its front 
tab set on the Shaft, Front and the right end of its rear hook set on the 
Shaft, Rear, and then install them in a twisting motion as shown in Figure 
4-82. 
11. Remove the Carriage Unit by following steps below.
11-1. Pull the Carriage Unit toward you and compress it to the Shaft, 
Front ( ) to make the bearings that are attached on the rear of 
the Carrigage Unit apart from the Shaft, Rear.
11-2. Lift the rear of the Carriage Unit upward to release it from the 
Shaft, Front ( ),  lift the front of the Carriage Unit so that it is 
released from the Shaft, Front, and then remove the Carriage 
Unit.
Figure 4-82. Carriage Unit Removal
Be sure to install the CR SUS plate as shown in Figure 4-82 
or its tab may get bent.





Be sure to refer to Chapter 5 “Adjustment” (p.366) and 
perform specified adjustments after replacing or removing 
the Carriage Unit.
1
2
Carriage Unit
Shaft, Front
Shaft, RearShaft, Rear
CR SUS PLATE SUPPORT TOOL 
						

							EPSON Stylus Pro 4400/4450/4800/4880/4880CRevision CDisassembly & Assembly Disassembly Procedures 2704.2.7.2  Motor Assy., CR1.Remove Cover, Side, Left (p216).
2.Remove Cover, Side, Right (p217).
3. Disconnect the connector from the Motor Assy., CR.
4. Slide carriage to the center of the printer. 
(Refer to 4.2.4.3 C593_SUB Board (p234).)
5. While pushing up Lever, Lock, PG, loosen the CR Tension Installation 
screw and release the tension of Belt, CR.
6. Release Belt, CR from the pinion gear of Motor Assy., CR.Figure 4-83. Disconnecting the CR Motor Connector
Figure 4-84. Releasing Tension of Belt, CR
	


When performing the following steps, note the position set 
on the scale of Holder, Pulley. Returning to this same 
position when installing the Belt, CR will reduce the time 
needed for belt adjustment.

When performing the following step, be careful not to 
scratch the Motor Assy., CR pinion gear.
Connector
Belt, CR
Screw
Lever, Lock, PG