All rights reserved. Reproduction of any part of this manual in any form whatsoever without
SEIKO EPSON’s express written permission is forbidden.
The contents of this manual are subjects to change without notice.
c’
-. -
All efforts have been made
any errors be detected, SEIKO EPSON would greatly appreciate being informed of them.
The above notwithstanding SEIKO EPSON can assume no responsibility for any errors in this
manual or the consequence thereof.
Epson and Epson
General Notice: Other product names used herein are for
trademarks of their respective
EsC/l?
@Copyright 7994 by SEIKO EPSON CORPORATION
toensurethe
are registered trademark of Seiko Epson Corporation.
campanies.
accuracy of the contents of this manual. However, should
identication
-i-
purposes only and may be
Nagano,
Japan
. .
“1
C
3
PRECAUTIONS
Precautionary notations throughout the text are categorized relative to 1) personal injury and 2)
damage to equipment.
DANGER
WARNING
The precautionary measures itemized below should always be observed when performing repair/
maintenance procedures.
Signals a precaution which, if ignored, could result in serious or fatal personal injury.
Great caution should be exercised in performing procedures preceded by DANGER
Headings.
Signals a precaution which, if ignored, could result in damage to equipment.
DANGER
1.
ALWAYS DISCONNECT THE PRODUCT FROM BOTH THE POWER SOURCE AND
PERIPHERAL DEVICES PERFORMING ANY MAINTENANCE OR REPAIR PROCEDURE.
NO WORK SHOULD BE PERFORMED ON THE UNIT BY PERSONS UNFAMILIAR WITH
2.
BASIC SAFETY MEASURES AS DICTATED FOR ALL ELECTRONICS TECHNICIANS IN
THEIR LINE OF WORK.
3.
WHEN PERFORMING TESTING AS DICTATED WITHIN THIS MANUAL, DO NOT
CONNECT THE
THE POWER SUPPLY CABLE MUST BE CONNECTED, USE EXTREME CAUTION IN
WORKING ON POWER SUPPLY AND OTHER ELECTRONIC COMPONENTS.
UNITTOA
POWER SOURCE UNTIL INSTRUCTED TO DO SO. WHEN
WARNING
1.
REPAIRS ON EPSON PRODUCT SHOULD BE
CERTIFIED REPAIR TECHNICIAN.
2.
MAKE CERTAIN THAT THE SOURCE VOLTAGE IS THE SAME AS THE RATED VOLTAGE, LISTED ON THE SERIAL NUMBER/RATING PLATE. IF THE EPSON PRODUCT
HAS A PRIMARY AC RATING DIFFERENT FROM AVAILABLE POWER SOURCE, DO
NOT CONNECT IT TO THE POWER SOURCE.
ALWAYS VERIFY THAT THE EPSON PRODUCT HAS BEEN DISCONNECTED FROM
3.
THE POWER SOURCE BEFORE REMOVING OR REPLACING PRINTED CIRCUIT
BOARDS AND/OR INDIVIDUAL
4.
IN ORDER TO PROTECT SENSITIVE MICROPROCESSORS AND CIRCUITRY, USE
STATIC DISCHARGE EQUIPMENT, SUCH AS ANTI-STATIC WRIST STRAPS, WHEN
ACCESSING INTERNAL COMPONENTS.
REPLACE MALFUNCTIONING COMPONENTS ONLY WITH THOSE COMPONENTS
5.
BY THE MANUFACTURE; INTRODUCTION OF SECOND-SOURCE
NONAPPROVED COMPONENTS MAY DAMAGE THE PRODUCT AND VOID ANY
APPLICABLE EPSON WARRANTY.
CHIPS.
PERFORMED ONLY BY AN EPSON
ICS
OR OTHER
- ii -
PREFACE
This manual describes functions, theory of electrical and mechanical operations, maintenance, and repair
of Stylus Color.
The instructions and procedures included herein are intended for the experience repair technician, and
attention should be given to the precautions on the preceding page. The chapters are organized as
follows:
CHAPTER 1. PRODUCT DESCRIPTION
Provides a general product overview, lists specifications, and illustrates the main components of the printer.
CHAPTER 2. OPERATING PRINCIPLES
Describes the theory of printer operation.
CHAPTER 3. DISASSEMBLY AND ASSEMBLY
Includes a step-by-step guide for product disassembly and assembly.
CHAPTER 4. ADJUSTMENTS
Includes a step-by-step guide for adjustment.
CHAPTER 5. TROUBLESHOOTING
Provides Epson-approved techniques for
adjustmen~
CHAPTER 6. MAINTENANCE
Describes preventive maintenance techniques and lists lubricants and adhesives required to
: These conditions are acceptable when the printer is in its shipping container.
3
: Without condensation.
Humidity
(% RH)
pn”nter,
80!!0
55?40
20?40
I
. . . . . . . . . . .
. . . . . . . . . . .
. . . . . . . . . . .
10-
35° c (50 - 95° F) “
20-
80!%0
RH ● ’73
IG (within 1
rnsec.)
0.15 G
–20 - 60° C (-4 - 122° F) ● 2
5- 85% RH
2G (within 2
0.50 G
“2’3
msec.)
2
conditions must be in the range shown in the figure below.
:
Guara,nleed
range
Rev. A
Io”c
(50”F)
Figure 1-6.
27°C
35°C
(80°F) (95°F)
Temperature/l=lumidity
‘c
(“F)
Range
1-7
Product
Llsscriptkm
1.2.7 Reliability
MTBF:
Total print volume:
Printhead life:
1.2.8 Safety Approvals
4JIO0
power on hour
75,0(X) pages
1$00 million
(pOH)
(A4,
Letter)
dots/nozzIe
stylus Colar
&wvke Msnusl
Safety
Radio frequency interference
standanis:
(RFI):
1.2.9 Physical Specifications
Dimension (W x D x H):
Weight
120V
version:
22@240V
120V
version:
220-240V
470
X
525X
7.4 Kg
(163 lb)
UL1950
CSA22.2
version:
version:
192 (mm) (18.5X 20.7X 7.56 (in.))
EN 60950
NEMKO,
FCC part 15 subpart B class B
Vfg.243 (VDE0878
EN55022
with D3,
#950 with D3
~, SEMKO, DEMKO,
SETI)
(CEPR
part 3, part 30)
PUB. 22) class B
.-
\
(
1-8
Rev. A
Stylus
Color
Service Manual
Product Description
1.3 INTERFACE SPECIFICATIONS
The Stylus Color is standard-equipped with an 8-bit parallel and serial interface.
1.3.1 Serial interface Specifications
Data format:
Synchronization:
Handshaking:
Signal level:
8-bit parallel
By STROBE pulse synchronization
By BUSY and
TTL compatible
ACKNLG
level
signals
Adaptable connector:
Data transmission timing:
BUSY
ACKNLG
DATA
STROBE
Figure 1-7. Data Transmission Timing
36 pin 57-30360
See Figure 1-7.
L.&
(Amphenol)
L_-
or equivalent
0.5 ps (minimum)
0.5
IJS
(minimum)
0.5
ps
(minimum)
Note:
The Busy signal is active (HIGH) under the following conditions:
The ERROR signal is active (LOW) under the following conditions:
The PE signal is active (HIGH) under the following conditions:
Transition time (rise time and fall time) of every input signal must be less than 0.2
- During data reception (See Figure 1-7.)
- When the input buffer is full
- When the INIT input signal is active
- During initialization
- When the ERROR or PE signal is active
- During the self-test mode
- During the demonstration mode
- During the default setting mode
- When a fatal error occurs
- When a paper-out error occurs
- When a no ink cartridge error occurs
- When a fatal error occurs
- When a paper-out error occurs
- When a fatal error occurs
ps.
Rev. A
1-9
Table 1-9 shows the
Rev. A
co
nm@or
pin assignments and signal functions
of the
8-bit parallel interface.
Table 1-9. Signal and Connector Pin Assignments
Pin No.
1
2-9DATA 1-8
10
11
12
13
Signal Name
STROBE
ACKNLG
BUSY
PE
SLCT
I/o’
The
STROBE pulse is used to read data from the host
computer. The pulse
I
it is
HIGH, and data is latched with the rising edge of this
signal.
DATA 1-8 are parallel data
HIGH, the data bit is 1; when LOW, the data bit is O. The most
significant bit
I
maintained
active edge.
ACKNLG
approximately 10 p.s. This signal goes LOW upon the
o
completion of data reception to indicate that the printer
ready to receive further
The BUSY signal informs the host computer of the printer’s
status. When this signal is HIGH, the printer cannot accept
o
any more data.
This signal indicates whether paper is available in the printer
o
or not. A HIGH level indicates no paper.
o
Pulled up to
(MSB)
for 0.5 ps on either side of the STROBE signal’s
is an acknowledge pulse with a width of
+5V
through a 1.0 KQ resistor in the printer.
Description
width must be 0.5 ~ or more.
bits. When one of these signals
is
DATA 8. The signal state must
data.
for
Parallel Interface
Normally,
is
be
is
14
31
32
35
17
16
19-30
33,36
15,18,34
—
*
7he //0
If this signal is set to LOW, the printer automatically performs
AFXT
m
ERROR
+5V
CHASSIS
GND
-
-
-
column indicates the direction of the
one line feed upon receipt of a CR (carriage return) code. The
I
status of this signal is checked onty at power on and
initialization.
If this signal goes LOW, the printer is initialized. The pulse
I
width of this signal must be 50
This signal goes LOW if the printer has a fatal error or runs
o
out of paper.
Pulled up to
-
Chassis ground.
-
Signal ground.
.
.
.
Not
USed.
-
+5V
signal
@ or more.
through 1.0 KQ resistor in the printer.
as viewed hm the
printe~
. .
,.
c
2
1-1o
Stvlus Color
Service
Manual
1.3.2 Parallel Interface Specifications
RS-422
Data format:
serial
Product Description
Synchronization:
Handshaking:
Table 1-10.
State
Busy
Ready
Word length
Start bit:
Data bit:8 bit
Parity bit:
Stop bit:
Bit rate:
Adaptable connector:
Recommended I/F cable:
Asynchronous
By
DTR
signal and X-ON/X-OFF protocol
DTR
and
X-OIVX-OFF
Buffer Space
Less than 512 bytes
More than 1,024 bytes
1 bit
none
1 bit
57.6K bps
8-pin mini-circular connector
Apple@
System Peripheral-8 cable
Protocol
DTR
off
On
X-OWX-OFF
X-OFF
X-ON
Table 1-11. Signal and Connector Pin Assignments for Serial Interface
Pin No.
Signal Name
I/o’
Description
1
2NC
3
4SG
5
6
7
8
* The
1/0 column
DTR
TXD
RXD
TXD
NC
RXD
indicates the data flow as viewed from the
out
out
In
In
out
In
Data terminal ready
No connection
Transmit data
Signal ground
Receive data
Balanced transmit
No connection
Balanced receive
printer.
Rev. A
1-11
Product
Rev. A
LMscriptkw
1.4 OPERATIONS
This
section describes the basic operations of the printer.
1.4.1 Control Panel
stylus COW
SerVke
Aww4d
The control panel for this printer has 1 lock type, 5
indicators for easy
operation
Un
J
3 Romau
3
Z
3
;$s’ige
of the various printer functions.
Cl
Operate
U
Data
O Pap9r
Out
No Ink Cartridge
Courier
T
(PS)
Saris Serif H
Roman
Saris Serif
Font
(PS)
m
m
Cl
ncm-lock
Pause
Figure 1-8. Control Panel Appearance
type push buttons, and 14 LED
Alt
c
I
I
IR
t
ese
Buttons
Operate
Att
Font
Economy/Condensed
Load/Eject
PauseStops printing temporarily or resumes printing if it has been
Turns the printer on or off.
Modifies the function of other buttons. Holding down this button
for 3 seconds causes the printer to move the carriage to the ink
cartridge installation position. Pressing
to return to the home position.
Cycles through the font choices. pressing the
holding down the AH button causes the carriage to move to the gap
adjustment position. Pressing the AN button again causes the
carriage to return to the home position.
Selects either the economy printing or
Pressing the
the
Alt
button starts the color
Either loads a new sheet into the printer or ejects paper currently in
the paper path. Pressing the
the
Alt
button starts the black
stopped temporarily. Pressing
button resets the printer.
Economy/Condensed
printhead
L~d/E@t
printhead
Pause
Ait
again causes the carriage
F~t
button, while
mndensed
button while holding down
cleaning cycle.
button while holding down
cleaning cycle.
while holding down the
printing mode.
Alt
1-12
ma,.
L
~.
A
‘,
.;
Stvlus Color
Indicators
Operate
Se
fvice Manual
Product Description
On
when the printer is on. Blinks during power on and off sequence.
Data
On when print data is in the input buffer. Data and Pause lights
blink if an error occurs.
On
Paper Out
when the printer is out of paper. Blinks when a paper jam
occurs.
On
No Ink Cartridge
Economy
Condensed
Font
Pause
when the ink is exhausted.
On
when economy printing mode is selected.
On
when condensed printing mode is selected.
These
LEDs indicate the selected font.
On
when printing is paused.
1.4.2 Panel Operation at Power On
You can activate the following modes by doing the following:
Self-test mode
Hex dump mode
Demonstration mode
Default setting mode
Initialize EEPROM
Turn on the printer while holding down the
Turn on the printer while holding down the
buttons. Once this mode is selected, the printer prints all received
data in hexadecimal format.
Turn on the printer while holding down the
Turn on the printer while holding down the Economy/
Condensed
button. For more information about the mode, see
Section 1.4.3.
Turn on the printer while holding the Alt, Font, Load/Eject, and
Pause
buttons.
Load/Eject
Font
and
Alt
button.
button.
Load/Eject
Rev. A
1-13
Product
Oesct’iptkm
1.4.3 Default Settings
St’jms Cokw
SawicO
ManUd
The printer can save some printer setting parameters that define its functions at
can change these parameters by using the printer’s default setting mode.
initializatkn.
1.4.3.1 Default Setting Items
You can
default-setting mode by holding down the
printer.
use the
det%ult
setting mode to change the settings listed in the table below. Activate the
Economy/Condensed
button while turning on the
Table 1-12. Default Setting Items
Menu
Contents
Character table
Print direction
Network l/F mode
Auto line feed
Loading position
Selects the character table
Controls the print direction. (See Tables 1-12 and 1-13)
Auto
Bi-D
Uni-D
Off: For normal environments.
On: For network environments.
On: Valid
Off: Invalid
3.0/8.5
mm (0.12/0.33 in.)
Description
You
mct31111
.
.
off
.
3.0
mm
e
Interface mode
Auto l/F wait mode
Table 1-13. Characteristics of Print Direction Mode
ttem
Auto
Bi-D
Uni-D
Black and White Printing
I
Throughput and quality is
better.
Throughput is best.
Print quality may be down.
Throughput is worse.
Print quality is better.
Table
l)efaul:~~tting
Auto
I/F
mode
Parallel l/F mode
Seriil
l/F mode
Optional l/F mode
1 0/30 seconds
1-14.
Printing Direction and
Auto
ESC UO
ESC U1
.
10 sec.
Color
I
Throughput is better.
Color quality with special paper is
(Color correction depends on the printing direction.)
Throughput is better.
Color quality with special paper is worse.
(Color correction depends on the printing direction.)
Throughput is worse.
Color quality is best.
Bi-O
r
None
ESC UO
ESC UI
(CMYK)
ESC
U Command
Printing
WOW.
None ESC UO
Uni-D
ESC U1
None
Character mode
(for
MS-DOS?
Raster graphics
mode (fo~
Vvindows
Note:
1-14
)
Printing
Auto
Bi-D
ditection
Auto
Uni-D
is
controlkdby
Auto
Auto
dtiverin
Bi-D
Bi-D
IMndows entimnment
Uni-D
Uni-D
Bi-D
Bi-D
Uni-DUni-DUni-D
Bi-DUni-D
Uni-D
Rev.
*
A
Stylus Color Service Manual
Product Description
1.4.3.2 Changing the Default Settings
To change the printer’s default settings:
a.
Hold down the
sheet that shows the firmware version and describes how to select the language used to print
messages.
b.
Press
the
Font
which language corresponds to which font LED.
Economy/Condensed
button until the appropriate font LED is selected. The following table shows
button and turn on the printer. The printer pMts a
Table 1-15. Language Selection
Language
English
Fran~is
Deutsch
ItalianaRoman
Espafiol
c.
Press the
prints a table showing how to change the printer settings.
d.
Press
the
indicated by the Courier, Roman T
Font button, you adance to the next setting, and the three font
selection.
Alt
button. The printer prints the current settings using the selected language. It also
Font
button to advance through the setting menu. The current printer settings are
(PS)~and
Font LED
Courier
Roman T
Saris Serif H
Saris Serif
San Se;if H
(PS)
(PS)
Table 1-16. Feature Selection
Menu
Saris
Serif H
(ps)
LED
Setting
Feature/Menu
Courier
LED
Roman T
(PS)
LED
(PS) LEDs. Ead”time
LEDs
change according to the
Setting Value
I
O rate
r
ED
Ii
DataPaper
LED
you
pr&s
the
Out LED
Character table
Print direction
Vetwork
Loading position
Auto l/F
e. Change the setting value by pressing
l/F mode
Auto line feed
interface mode
wait time
for the current menu. The status
On
On
off
On
off
On
off
On
off
On
On
off
off
On
Alt
of the
On
I
I
off
I
off
off
On
I
On
I
On
button. Pressing the
LEDs
I
Auto
I
Bi-D
Uni-D
off
On
off
On
3
mm
8.5 mm
Auto
Parallel
Serial
Option
I
10
sec.
30 sec.
will be changed as the button is pressed,
See Table 1-16
On
I
off
I
On
off
On
off
On
off
On
On
off
OnOn
I
Off
off
On
Alt
button changes the setting
offoff
1
On
I
On
off
off
off
offoff
off
off
off
On
off
1
off
off
+
I
r
off
1
off
off
off
off
off
off
off
off
off
On
1
off
off
-
Rev. A
1-15
Pfvduct
Rev.
Description
Sty#Us Cokw
Table 1-17. Character Table Selection
~
Mllnuul
Version
Common
Standard
NLSP
f. Repeat d and e to change other printer settings. The setting menu selection will return to the
first menu after the
g. Turn off the printer. The setting is stored intonon-volatile memory.
Settings
Italic U.S.A.
Italic France
Italic Germany
Italic U.K.
ttalic
Denmark 1
Italic Sweden
Italic Italy
Italic Spain 1
The printer can detect the various errors and indicate them with the
LEDs.
Table 1-18. Error Indications
f
Error
Paper out
No ink cartridge
Paper jam
Maintenance request
Carriage error
Data LED
off
offoff
off
Blinks
Blinks
Pa~;rDOut
On
Blinks
Blinks
offoff
No Ink
Catiridge
LED
off
On
off
BlinksBlinks
Ecm~my
offoff
offoff
off
offoff
Con&sed
offoff
Blinks
Pfg~
off
off
Blinks
Blinks
#KG@$4 L
1.4.5 Printer Initialization
There are three initialization methods: hardware initialization, software initialization, and panel
initialization.
1.4.5.1 Hardware
Hardware initialization is performed
Turning on the printer.
-
%mdin~
the parallel interface
(If the
INIT
the
INIT
signal becomes inactive.)
Initialization
by:
INIT
signal.
signal is active when the printer is turned on, hardware initialization is started when
,,4#R
When the hardware initialization is performed:
- The printer mechanism is initialized.
Input data buffer is cleared.
Downloaded character definitions are cleared.
Print buffer is cleared.
Default values are set.
1.4.5.2 Software Initialization
Software initialization is performed upon receipt of the control code ESC
When the software initialization is performed:
Print buffer is cleared.
Default values are set.
1.4.5.3 Panel Initialization
This printer is initialized by pressing the
When the panel initialization is performed:
Input data buffer is cleared.
Print buffer is cleared.
Default values are set.
Load/Eject
button while pressing the
@.
Alt
button.
Rev. A
1-17
Product
Rev. A
—
Descriptkm
1.5 MAIN COMPONENTS
- . — . - . --
-
Color Setvke
hfg@g##
.
The main components of the Stylus Color
Q
Printer mechanism
Q
Main control board
Cl
Power supply unit(C137PSB/PSE Board)
Q
Control panel board
Q
Housing
1.5.1 Main Control Board
The Main Control Board
array, a program ROM
and a lithium battery for powering the
equipped with both a logic system and a power system.
NJ.5P
(National Language Support Printer) specification.
z~
,
(M-4A10)
(C137
MAIN Board)
(C137PNL
(C137
(C137
MAIN Board) consists of an
(4M),
a dynamic
. . . . . . . . .
CN2
are:
Board)
MAIN Board)
RAM (4M),
protect counters.
IC14
a mask ROM
SLA7041
H8/3003
The
reset IC
The
8M program ROM is used only
1
1
m
l~bit CPU, E05A% gate
(4M
or
8M),
an
EEP-ROM
(M51955
~ ICl!i SI A7041
.-
,“ — .,
I
f-l
and ~ 592) is
“
—
c)
z
0
-
RM12
(lK),
fix
the
#——————
Figure 1-9.
/
Q14
CN1
K
BAT 1
C137
MAIN Board Component Layout
RM11
\@
i
I
(
“
.,
1-18
Stylus Color Service Manual
Product Description
1.5.2 Power Supply Board
The
Power Supply Board
This board is equipped with a power switch
is turned off, it can continue to operate in order to eject the paper and perform the head capping
operation. The power on/off signal is always monitored by the E05A96 gate array on the
MAIN Board,
and the logic system
CN2 ,
(C137 PSB/PSE
:-
. .
; Q51
–Qo
c~
(C137 PSB/PSE
Board) consists of an
comected
recognizes the power switch status.
j-- IC51 (TL494)
n
Board)
RCC
switching regulator circuit.
to the secondary circuit. Thus, if the printer
I
J
(@r
aa
u
I
cl
1-
DB1
C3
1-
,
L1
C137
–
cl
—
Figure 1-10.
1.5.3 Control Panel
The 14
6 switches in combination with one another, the printer can operate in each protect operation (color
or black cleaning, cartridge exchanging self-test, default setting value exchanging, reset, and
EEP-ROM
LEDs
on this board indicate the error status (there is no buzzer system); by using the
clear operation).
LED8
/-
LED14
(C137 PNL
t
[It
C137 PSB/PSE
Board)
SW6
❑
q
LED1
LED4
Component Layout
t
1---1
/
LED5
0
LED6
0
I
m7
0
I
SW4 Ill
M
/
i-l
Swo
n
● 0
‘0
:0°
m
—
‘
I
Rev.
Figure 1-11.
A
C137 PNL
Board Component Layout
1-19
Product
Rev. A
D9sctiptk3n
Stylus
Color *vim Manual
1.5.4 Printer Mechanism
The
M-4A1O
printhead
The ink system has both a black pump unit and a
is made to flow into the individual caps. Power for the pump system and paper feed system is
supplied from the paper feed motor.
printer mechanism is equipped with a 64-black
on the carnage unit. Resolution of 720 dpi is possible with special (non-absorbent) paper.
(M-4A1O)
printhead
coIor
pump unit. Waste ink from each
and M-color
(CMY)
printhead
Figure 1-12. Printer Mechanism
1.5.5 Housing
The Stylus Color housing consists of the printer cover, uppercase, and the lowercase.
Attached to the housing
separator.