Epson 4880 C Service Manual

							EPSON Stylus Pro 4400/4450/4800/4880/4880CRevision COperating Principles Printer Mechanism Components 1512.2.8  OthersP-COVER OPEN SENSOR
This sensor is mounted at the Printer Cover right side open/close components 
to detect the open or closed condition of the Printer Cover.
Dtecting open/closed status of the cover causes the CR Motor and PF Motor 
circuits to stop/operate the motors.REAR COVER SENSOR
This sensor is mounted at the printer right rear side to detect the removed/
installed condition of the Paper Guide Unit.
Detecting installed/uninstalled status of the unit causes the CR Motor and PF 
Motor circuits to stop/operate the motors.CIRCUIT BOARD LAYOUT
A Panel Unit is mounted to the printer front right surface, and an AC Inlet, 
Power Supply Circuit Board and MAIN Circuit Board are mounted in a rear 
surface compartment.Figure 2-60. Cover Sensor/Panel Unit
Figure 2-61. Circuit Board Layout
Panel Unit P-Cover Open Sensor Rear Cover Sensor
AC Inlet
MAIN Circuit 
Board Power Supply 
Circuit Board 
						

							EPSON Stylus Pro 4400/4450/4800/4880/4880CRevision COperating Principles Outline of Control Circuit Board 1522.3  Outline of Control Circuit BoardThis section describes the operation of BOARD ASSY., MAIN, which controls 
and drives the Printer Mechanism of Stylus Pro 4400/4450/4800/4880/4880C.
†C593 MAIN Board: Stylus Pro 4400/4800
†CA00 MAIN Board: Stylus Pro 4450/4880/4880C
NOTE:For circuit board details, refer to Chapter 7:Appendix (p.457) 
at the end of this volume.
†Explanation of major elements
Figure 2-62. C593 MAIN Board – Circuit Block Diagram Table 2-14. Major Elements
Model No.
Location
Function
SDRAM IC2/23 System memory 64MB (256Mbit x 2)
Flash ROM IC12 Flash Memory 2MB (1Mbit x 16bit)
• For storage of control program 
(firmware)
• Saving of various setting parameters 
and control information
SH-3
SH-7709SIC15 32bit RISC-CPU
• Operational frequency: Internal 96MHz
External 48MHz
E09A54RA IC17/18 Custom ASIC
• Head drive voltage waveform generation 
control
RTC9824SA IC16 Real-Time Clock
• Sets year/month/day by F/W
• MAIN PCB reset signal formation
E05C25BB IC19 Custom ASIC
1. Print data processing
• Rasterizer
• Head drive control
2. Mechanism control 
(motors and solenoids)
3. Sensor control
TSB43AA82A IC4 ASIC
• IEEE1394-I/F control
A3958SLBTR-T IC5 CR Motor driver
• PWM current control method
A3958SLBTR IC6 PF Motor driver
• PWM current control method
AA6628SEDTR-T IC7 • ASF/Pump Motor driver
• PG/PO Motor driver
Table 2-14. Major Elements
Model No.
Location
Function
PF motor driver
ASF/pump motor 
PG/PO motor 
driver
Real-Time Clock
Custom ASICASIC Custom ASICCR motor
PF motor
ASF/pump 
motor
PG/PO moto
r
Custom
ASIC
Head FFC Lithium batteryBAT1
RTC9824SA
(IC16)E05C25BB
(IC19)A3958SLBTR-T
(IC5)
A3958SLBTR
(IC6)
A6628SEDTR-T
(IC7)
TSB43AA82A
(IC4) (IC12)(IC15)
(IC2) (IC23)
E09A54RA
(IC17)
E09A54RA
(IC18)
CR motor driver 
						

							EPSON Stylus Pro 4400/4450/4800/4880/4880CRevision COperating Principles Outline of Control Circuit Board 153
E
Figure 2-63. CA00 MAIN Board - Circuit Block Diagram
PF motor driver
ASF/pump motor
PG/PO motor
driver
Real-Time Clock
Custom ASIC Custom ASICCR motor
PF motor
ASF/pump
motor
PG/PO motor Custom
ASIC
Head FFC Lithium batteryBAT1
RTC9824SA
(IC16)E05C25BB
(IC19)A3958SLBTR-T
(IC5)
A3958SLBTR
(IC6)
A6628SEDTR-T
(IC7) (IC12)(IC15)
(IC2) (IC23)
E09A54RA
(IC17)
E09A54RA
(IC18)
CR motor driver 
						

							EPSON Stylus Pro 4400/4450/4800/4880/4880CRevision COperating Principles Outline of Power Supply Circuit Board 1542.4  Outline of Power Supply Circuit Board100VAC from electric outlet is supplied to Power Supply Circuit Board through 
a Power Cable and AC Inlet.
The power switch constitutes a secondary power switch system. 
The secondary power switch system operates as follows: even with the power 
switch turned off, the Power Supply Circuit Board is operating by a slight power 
as long as the Power Cable is connected.There are three control signals between the BOARD ASSY., MAIN and the 
Power Supply Circuit Board. Table below describes details of the control 
signals:
Even after the power switch is turned off, the Power Supply 
Circuit Board does not stop operating immediately, but 
power is kept on until the ink system ending sequence is 
completed. 
Do not disconnect the Power Cable or do not shut off power 
by turning off any power switch other than that on the 
printer.
Table 2-15. Operational Descriptions
Signal Name
Function
REM_ON
(MAIN → Power 
Supply)Operating Turned ON/OFF by BOARD ASSY., MAIN.
• When these terminals are shorted, the drive 
system power supplies 28 VDC and 42 VDC 
are active.
OFF • When these terminals are open (= L), the 
drive system power supplies 28 VDC and 42 
VDC are 0 VDC.
• The 5 VDC power is not controlled with these 
terminals.
AC_OFF
(MAIN ← Power 
Supply)Operating
(=H)When each output from the Power Supply 
Circuit Board has become inactive because of 
turning off of the power switch or when the input 
voltage has dropped below the rated voltage 
value, H signal is sent to the BOARD ASSY., 
MAIN.
OFF
(=L)The power switch is turned on and the Power 
Supply Circuit Board Unit starts operating so 
that each output becomes active.
L signal is sent to the BOARD ASSY., MAIN.
POWER_SW
(Panel/MAIN → 
Power Supply)Operating Connected to the power switch on the Panel 
Unit.
• These terminals are shorted when the switch 
is ON. The Power Supply Circuit Board 
becomes active.
Not 
operatingThese terminals are open when the switch is 
OFF. The Power Supply Unit keeps operating 
for about ten and several seconds to a few 
minutes and then turns off. 
						

							EPSON Stylus Pro 4400/4450/4800/4880/4880CRevision COperating Principles Colorimetric Calibration (Color ID) Overview 1552.5  Colorimetric Calibration (Color ID) OverviewThis printer employs Colorimetric Calibration (Color ID) to correct unit-to-unit 
variations in color.
Colorimetric Calibration (Color ID) corrects not only the weight of ink droplets 
which differs according to the characteristic of individual printhead but variable 
factors such as drive circuit and voltage, which provides a higher-accuracy 
calibration.OVERVIEW
1. Printing/ Mesuring the color of a correction pattern.
The calibration is performed by printing a correction pattern with a 
completed product and mesuring the color of the pattern using a calibrator.
2. Writing the correction value.
Write the correction value that was calculated from the value obtained by 
color  mesurement to the NVRAM on the main board.
3. Reflecting the correction value.
The printer driver reads the correction value stored in the NVRAM during 
printing, and correct the dot generation amount for each dot size in the 
print data.
Figure 2-64. Colorimetric Calibration (Color ID) Image
Prinhead
Main Board Supply Board Main Unit
Variation of elements 
in the drive control 
circuit for printheadVariation of 
reference 
voltage for 
individual 
printhead Characteristic of 
individual printhead
Colorimetric Calibration 
(Color ID)
Correction of dot generation amount
Drive Control 
Circuit for 
Printhead
Correction of weight of 
ink droplets
Printing 
Result 
						

							CHAPTER
3
TROUBLESHOOTING 
						

							EPSON Stylus Pro 4400/4450/4800/4880/4880CRevision CTroubleshooting Outline1573.1  OutlineThis section explains procedures for rapid and efficient troubleshooting if 
trouble occurs in the printer.3.1.1  Check Before TroubleshootingFirst of all, when performing troubleshooting, the following basic parts should 
be checked.
1. Look in the printer for any foreign matter and make sure there is nothing 
there to hinder normal operation.
2. With the printer in READY condition, press the [Menu] key one time, and 
then press the [Paper Feed (
∧ / ∨)] keys to select TEST PRINT. Press the 
[Menu] key again one time, press the [Paper Feed (
∧ / ∨)] keys to select 
STATUS CHECK. After these have been selected, press the [Menu] key 
two times to print.
From the status sheet, you can check to see if the cause of the trouble is 
that the printer (either the printer unit itself or some major unit) is at the end 
of its service life, and check the user inherent panel settings, etc.
(Refer to Step 9 when in properties panel settings.)
3. There should be no market soiling of the outside or the inside of the printer. 
If it is extremely soiled, carry out cleaning.
4. Each of the units and parts in the printer should not be missing or 
damaged, and should have the normal shape and configuration.
5. Each of the harnesses should be undamaged, and should be correctly 
connected to the relevant connector (perpendicularly and in the correct 
direction).
6. Each cam and gear in the printer mechanism should have no uneven wear 
or be overly worn, and the combinations should be correct.
7.  Each type of rubber roller in the printer mechanism should be cleaned and 
it should be ascertained whether the cause of the trouble is because of dirt 
or due to some other cause.
8. Each type of rubber roller in the printer mechanism should not be unevenly 
worn or excessively worn, and their combinations should be correct.9. As necessary, initialize the NVRAM on the BOARD ASSY., MAIN (return 
the individual settings and panel settings to the factory settings).
Carry out initialization by executing Panel Initialization in Maintenance 
Mode 1.
3.1.2  Narrow Down the TroubleTo increase the troubleshooting efficiency, follow the flow chart below and 
narrow down the trouble.

Be sure to refer to 4.1.1 Cautions (p.201) for the detailed 
description when handling a lithium battery that is installed 
for RTC backup on the MAIN Board.

„
When disassembling/assembling, turn the printer power 
switch OFF. After confirming that panel display 
disappears, unplug the power cable from the electric 
outlet and then continue operations.
„
Only the specified printer tools should be used so as to 
maintain the printers quality.
„
Only the specified lubricants and adhesives should be 
used.
„
The specified adjustments should definitely be carried 
out.
Trouble Occurs
Troubleshooting Based on Panel 
Messages (p.158) 
Corrective Actions for 
Displayed Warnings 
(p.162) 
Corrective Actions for 
Error Display (p.165) 
Troubleshooting Based on Your Printout 
(p.196) 
Corrective Actions for 
Service Request Display 
(p.175)  
						

							EPSON Stylus Pro 4400/4450/4800/4880/4880CRevision CTroubleshooting Troubleshooting Based on Panel Messages 1583.2  Troubleshooting Based on Panel MessagesThis printer conducts self testing based on output conditions of each sensor. Any error detected by self testing is displayed by an LCD message and LED indicators. 
This section explains corrective actions for errors and error messages.3.2.1  Message TableMessages displayed by the printer and message priorities are shown below.
NOTE:
Warnings are shown with blue shading and Service Requests are shown with yellow shading
Table 3-1. Displayed Error Messages
Priority
LCD Panel Message
Displayed Error
LED
Reference Page
Paper Check
Pause
Ink Check
Low MNT TK NEAR FULL Maintenance tank near – – Blinkp.162
INK LOW Ink low
*1
––Blinkp.162
MNT REQ nnnn Maintenance request *2 – –p.162
PAPER LOW Paper near end
*3
Blink – –p.164
REMOVE PAPER Cleaning unavailable ON – –p.165
NOZZLES STILL
                 CLOGGEDCleaning failure
Blink ON Blinkp.165
CHANGE
             PAPER TYPEMulti Sensor SN gain error Blink – –p.165
Multi Sensor paper recognition error Blink – –p.165
WRONG PAPER SIZE Cut sheet size error Blink ON –p.165
REMOVE PAPER Paper eject error/ Front manual feed unavailable error Blink ON –p.166
PAPER OUT Paper end/ roll paper end ON – –p.166
RELOAD PAPER Borderless printing unavailable error
*4
Blink – –p.166
NO BORDERLESS
        WITH THIS SIZE
RELOAD PAPER Paper recognition error Blink – –p.167
RELOAD PAPER
       INSERT DEEPLYManual cut paper set error
Blink ON –p.167
NOT STRAIGHT
                    RELOADCut sheet loading error
*6
Blink ON –p.167
PAPER NOT
                 STRAIGHTPaper skew error
Blink – –p.167
PAPER NOT CUT Paper cut error Blink – –p.168
COMMAND ERROR Command error
Blink Blink Blinkp.168 
						

							EPSON Stylus Pro 4400/4450/4800/4880/4880CRevision CTroubleshooting Troubleshooting Based on Panel Messages 159
MISMATCH ERROR Wrong ink error
*4
Blink Blink Blinkp.168
DRIVER INK SET
SETTING IS WRONG
LOAD ROLL PAPER Wrong roll paper path ON ON –p.168
LOAD SHEET PAPER
                   IN P.TRAYWrong ASF paper path
ON ON –p.168
FEED SHEET PAPER Wrong manual paper path ON ON –p.168
FORBIDDEN MEDIA 
            FROM P.TRAYASF prohibitions
*4
ON – –p.168
FEED SHEET PAPER
                   MANUARY
TIMES REMAINING Conversion cartridge life near end
*1
–ONONp.164
REPLACE CNVRSION
 CRTG
Conversion cartridge life error
*1
––ONp.164
INVALID INK CRTG Wrong PK/ MK
*1
–ONONp.169
INK OUT Ink out *
1
––ONp.162
INVALID INK CRTG Wrong Ink cartridge – ON ONp.169
INVALID INK CRTG Wrong destination
*1
––ONp.170
WRONG INK CRTG Unavailable Ink cartridge
*1
––ONp.169
INVALID INK CRTG Wrong logo error
*1
––ONp.170
SET INK CRTG Ink Cartridge failure/ CSIC contact error
*1
––ONp.170
NO INK CRTG No Ink Cartridge
*1
––ONp.170
MNT TNK FULL Maintenance Tank full – – ONp.170
LOWER INK LEVERS Releasing left and right ink lever – – –p.170
LOWER L INK LVR Releasing left ink lever – – –p.170
LOWER R INK LVR Releasing right ink lever – – –p.170
TOP COVER OPEN Printer Cover open – – –p.171
LOAD PAPER Releasing Paper Lever (Except roll paper) ON – –p.171
LOAD PAPER
              SUCTIONReleasing Paper Lever (Roll paper only)
ON – –p.171
SET PAPER LEVER Releasing Paper Lever in operation ON – –p.172
REREASE LEVER
  REMOVE PAPER JAMPaper jam (ASF)
Blink – –p.172
REREASE LEVER
 REMOVE PAPER JAMPaper jam (CR)
*7
Blink – –p.172
NO MNT TNK No Maintenance Tank – – ONp.173
Table 3-1. Displayed Error Messages
Priority
LCD Panel Message
Displayed Error
LED
Reference Page
Paper Check
Pause
Ink Check 
						

							EPSON Stylus Pro 4400/4450/4800/4880/4880CRevision CTroubleshooting Troubleshooting Based on Panel Messages 160
.
Note *1 : Blink correspond ink indicator.
*2 : Paper check LED flashes at 5-second intervals.
*3 : Occurs only when the remaining paper detection is on with roll paper or cut paper loaded.
*4 : Display by switching at 3-second intervals.
*5 : To promote that release is available by [Pause] key, display the following display by turns at 1 sec., intervals.
PRESS  PAUSE BUTTON
*6 : Received data is initialized without initializing mechanisms (including completion of forced cleaning) even if panel reset has been done.
*7 : Displalys the request below when the rear sensor detects no paper after the paper is removed.
“TURN PRINTER PWR OFF AND THEN ON”REAR COVER OPEN Rear Cover open – – –p.173
OPTION I/ F ERROR Type-B Option I/ F Card Error Blink Blink Blinkp.173
UNLOCK
               PRINT HEADCR lock unlocked error
Blink Blink Blinkp.173
High
SERVICE REQ.
                 nnnnnnnnn
Service request, CR servo error (fatal error)
Blink
Blink
Blink
Refer to Table3-2
Table 3-1. Displayed Error Messages
Priority
LCD Panel Message
Displayed Error
LED
Reference Page
Paper Check
Pause
Ink Check