Epson 4880 C Service Manual

							EPSON Stylus Pro 4400/4450/4800/4880/4880CRevision CDisassembly & Assembly Disassembly Procedures 231 11. Release the four hooks securing the Guide Rail and remove the Guide 
Rail. (Refer to Figure 4-36.)
12. Remove the two screws securing the Bracket and remove the 
Bracket.(Refer to Figure 4-37.)
„C.B.S. 3x8: 2 pcs.Figure 4-36. Guide Rail Removal
Figure 4-37. Bracket Removal
Secure the two Guide Rail hooks to the two C593 MAIN 
Board installation holes.Install while aligning the two Bracket dowels with the two 
C593 MAIN Board positioning holes.
Hooks
Installation Holes
Dowels
Positioning Holes
1
2
3
Guide Rail
C.B.S 3x8
Bracket 
						

							EPSON Stylus Pro 4400/4450/4800/4880/4880CRevision CDisassembly & Assembly Disassembly Procedures 232 13. Remove the seven screws securing C593 MAIN Board.
„C.B.S. 3x8: 8 pcs.
14. Slide C593 MAIN Board forward and remove the C593 MAIN Board as 
keeping IEEE1394 connector clear of the plate.
Figure 4-38. C593 MAIN Board Removal
„Do not place the circuit board (solder side) directly on a 
conductive surface. 
„Circuit boards supplied as service parts have been 
equipped with lithium battery. Do not place the circuit 
board (solder side) directly on a conductive surface or 
let conductive material come in contact with the circuit. 
To do so may cause short out.





Be sure to refer to Chapter 5 “Adjustment” (p.366) and 
perform specified adjustments after replacing the C593 
MAIN Board.
C.B.S. 3x8
C.B.S. 3x8
IEEE1394 Connector 
						

							EPSON Stylus Pro 4400/4450/4800/4880/4880CRevision CDisassembly & Assembly Disassembly Procedures 2334.2.4.2  Power Supply Board / Power Supply Cooling Fan1. Remove the PCB Unit.(Refer to 4.2.4.1 C593 MAIN Board (p226).)
2. Disconnect the following connectors/harnesses from the Power Supply 
Board.
3. Disconnect the connectors of the “Power Supply Cooling Fan” from the 
“C593 MAIN Board”. (Refer to 4.2.4.1 C593 MAIN Board (p226).)
4. Remove the two screws that secure the Power Supply Cooling Fan, and 
remove the Power Supply Cooling Fan.
„C.B.S. 3x18: 2 pcs.
5. Remove the five screws securing the Power Supply Board and remove 
the Power Supply Board.
„C.B.S. 3x8: 5 pcs.Figure 4-39. Power Supply Cooling Fan Removal
Figure 4-40. Power Supply Board Removal

When removing the Power Supply Board, wait 5 minutes 
after unplugging the AC power cord before starting work to 
allow discharge of residual charge in the electrolytic 
capacitors.     
For your safety, never touch the primary smoothing 
capacitor (C6). Do not place the Power Supply Board 
(solder side) directly on a conductive surface.
Table 4-5. Connectors Connected to Power Supply Board
Connector 
No.
Color
Number 
of Pins
Connection Socket
CN1 White 2 AC Inlet
CN2 White 14 C593 MAIN Board (CN1)
C.B.S. 3x18
C.B.S. 3x8
C.B.S. 3x8
Connectors 
						

							EPSON Stylus Pro 4400/4450/4800/4880/4880CRevision CDisassembly & Assembly Disassembly Procedures 2344.2.4.3  C593_SUB Board1. Open Cover, Printer.
2. Release the carriage lock and move the Carriage Unit to the position 
shown in Figure 4-41.
(Refer to 4.2.1.2 Carriage Unit Lock Release/Lock Set Method (p208).)
3. Remove the three screws securing the Carriage Cover and remove the 
Carriage Cover upward. (Refer to Figure 4-42.)
„C.B.P. 3x8: 3 pc.Figure 4-41. Moving the Carriage Unit
Figure 4-42. Carriage Cover Removal
When performing the following steps, remove protective 
equipment if it is installed and make sure to release the 
Carridge Unit lock with the Transport Retaining Lever.
Refer to 4.2.1.1 Release of the Transport Retaining Lever 
(p207).
Slot
Carriage Unit
C.B.P. 3x8
C.B.P. 3x8Carriage Cover 
						

							EPSON Stylus Pro 4400/4450/4800/4880/4880CRevision CDisassembly & Assembly Disassembly Procedures 235 4. Disconnect all connectors/harnesses on the C593_SUB Board.
(Refer to Figure 4-43.)
5. Remove the screw securing C593_SUB Board and then remove 
C593_SUB Board. (Refer to Figure 4-43.)
„C.B.P. 3x8: 1 pc.
Figure 4-43. C593_SUB Board Removal Table 4-6. Connectors/Harnesses Connected to C593_SUB Board
Connector 
No.
Color
Number 
of Pins
Connection Socket
CN1 - 30 C593_SUB-D Board (CN4)
CN2 White 2 Cutter Solenoid
CN3 White 5 Multi Sensor
CN4 - 5 CR Encoder Board
Be sure to fasten both the grounding plate and the 
C593_SUB Board together with screws.
Grounding Plate
C.B.S. 3x8
C593_SUB Board
Harnesses
Connector
Connector 
						

							EPSON Stylus Pro 4400/4450/4800/4880/4880CRevision CDisassembly & Assembly Disassembly Procedures 2364.2.4.4  C511_SUB-B Board1.Remove Cover, Side, Right (p217).
2. Disconnect all connectors/harnesses on the C511_SUB-B Board.Note 1: CN100, CN101 have connector lock mechanisms that must be released to 
disconnect FFC. Refer to “Check Point“ on Release the harness lock as shown 
in the figure below. Be sure to lock it when reassembling. P.236.
2: Refer to Figure 4-44 for connector positions.
3: When connecting harnesses to the C511_SUB-B Board, connect them in the 
order shown in Table 4-7.
4: For the 4-color model, the CN39, CN42, CN43, CN45, and CN36 connectors 
are not used.
Figure 4-44. C511_SUB-B Board Connector Positions Table 4-7. Connectors/Harnesses Connected to C511_SUB-B Board
Connection 
Order
Connector 
No.
Color/
Mark
Number 
of Pins
Connection Socket
1 CN103 - 17 Panel Unit (CN1)
2 CN46 - 7 Porous Pad Assy., Ink Eject 
3 CN39 LK 7 CSIC_R1 Board (Light Black)
4 CN42 LC 7 CSIC_R2 Board (Light Cyan)
5 CN43 LM 7 CSIC_R3 Board (Light Magenta)
6 CN45 LLK 7 CSIC_R4 Board (Light Light Black)
7 CN22 Blue 2 P-Cover Open Sensor
8 CN36 White 2 I/H Lever Sensor (Right)
9 CN26 Black 2 Paper Eject Release Sensor
10 CN25 Red 2 ASF Paper Sensor
11 CN27 Yellow 2 Rear Hand Insertion Sensor
12 CN29 - 3 PE Sensor
13 CN31 Yellow 3 HP Sensor
14 CN33 White 3 P_THICK Sensor (0.3)
15 CN34 Black 3 P_THICK Sensor (0.8)
16 CN55 Blue 3 Pump Phase Sensor
17 CN102 - 17 C593 MAIN Board (CN48)
18 CN100 - 30 C593 MAIN Board (CN54)
19 CN101 - 30 C593 MAIN Board (CN51)
	


Release the harness lock as shown in the figure below. 
Be sure to lock it  when reassembling.Each Harness, CSIC (CN39, CN42, CN43, CN45) is marked 
with its corresponding ink name. Refer to Table 4-7 and 
connect the harnesses properly.
CN36CN34CN31CN29CN33CN26
CN22
CN55
CN27
CN39
CN42
CN103
CN102
CN45
CN43
CN46
CN101CN100CN25
Ink Names 
						

							EPSON Stylus Pro 4400/4450/4800/4880/4880CRevision CDisassembly & Assembly Disassembly Procedures 237 3. Remove the four screws securing C511_SUB-B Board and remove 
C511_SUB-B Board.
„C.B.P. 3x6: 4 pcs.
Figure 4-45. C511_SUB-B Board Removal
C.B.P. 3x6 
						

							EPSON Stylus Pro 4400/4450/4800/4880/4880CRevision CDisassembly & Assembly Disassembly Procedures 2384.2.4.5  C593_SUB-C Board1.Remove Cover, Side, Left (p216).
2. Release the FFC from the three clamps.
3. Disconnect all connectors/harnesses on the C593_SUB-C Board.Note 1: Refer to Figure 4-47 for connector positions.The CN 45 is not used.
2: When connecting harnesses to the C593_SUB-C Board, connect them in the 
order shown in Table 4-8.
Figure 4-46. Releasing FFC
Figure 4-47. C593_SUB-C Board Connector Locations Table 4-8. Connectors/Harnesses Connected to C593_SUB-C Board
Connection 
Order
Connector 
No.
Color/
Mark
Number 
of Pins
Connection Socket
1 CN38 MB 7 CSIC_L1 Board (Matte Black)
2 CN40 C 7 CSIC_L2 Board (Cyan)
3 CN41 M 7 CSIC_L3 Board (Magenta)
4 CN44 Y 7 CSIC_L4 Board (Yellow)
5 CN201 - 28 C593 MAIN Board (CN53)
6 CN200 - 15 C593 MAIN Board (CN52)
7 CN24 White 4 PF Linear Encoder Sensor
8 CN37 Black 2 I/H Lever Sensor (Left)
9 CN30 Yellow 3 ASF Phase Sensor
10 CN28 White 2 Paper Eject Phase Sensor
11 CN32 Red 3 PG Phase Sensor
Each Harness, CSIC (CN38, CN40, CN41, CN44) is marked 
with its corresponding ink name. Refer to Table 4-8 and 
connect the harnesses properly.
Ink Names
Clamps
FFC
CN45CN24CN37
CN28CN200CN201CN30CN44
CN41
CN40
CN38
CN32 
						

							EPSON Stylus Pro 4400/4450/4800/4880/4880CRevision CDisassembly & Assembly Disassembly Procedures 239 4. Remove the three screws securing C593_SUB-C Board and remove 
C593_SUB-C Board.
„C.B.S. 3x6: 3 pcs.
Figure 4-48. SUB-C Board Removal
C.B.S. 3x6 
						

							EPSON Stylus Pro 4400/4450/4800/4880/4880CRevision CDisassembly & Assembly Disassembly Procedures 2404.2.4.6  C593_SUB-D Board1.Remove Panel, Front/Panel Unit (p219).
2. Disconnect all the connectors/harnesses on the C593_SUB-D Board.Note 1: Refer to Figure 4-47 for connector positions.The CN 45 is not used.
2: When connecting harnesses to the C593_SUB-D Board, connect them in the 
order shown in Table 4-9.3. Remove the four screws securing C593_SUB-D Board and remove 
C593_SUB-D Board.
„C.B.P. 3x6: 4 pcs.Figure 4-49. C593_SUB-D Board Connector Positions
Figure 4-50. C593_SUB-D Board Removal Table 4-9. Connectors/Harnesses Connected to C593_SUB-D BoardConnection 
Order
Connector 
No.
Color/
Mark
Number 
of Pins
Connection Socket
1 CN1 - 31 C593 MAIN Board (CN7)
2 CN2 - 31 C593 MAIN Board (CN8)
3 CN3 - 30 C593 MAIN Board (CN9)
4 CN4 - 30 C593 SUB Board (CN1)
5 CN5 - 31 Print Head Board (CN1)
6 CN6 - 31 Print Head Board (CN2)
Each Harness, Head, Intermit and Harness, Head is 
marked with its connector No. Refer to Table 4-9 and 
connect the harnesses properly.
Connector Numbers
CN3
CN1
CN6
CN4CN5
CN2
C.B.S. 3x6