Main
EPSON TERMINAL PRINTER
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As
SERVICE MANUAL
EPSON
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Nagano,
C
PRECAUTIONS
DANGER
- ii -
WARNING
PREFACE
The contents of this manual are subject to change without notice.
iv -
REVISION SHEET
Revision Issue Date
Page /Contents
TABLE OF CONTENTS
vi -
Chapter 1
Product Description
Table of Contents
1-9
-.,
1.1 FEATURES
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Figure 1-1. Exterior View of the
\(A~i.,et)
Page
Table 1-3. Character Tables
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1.2.2
Paper Handling Specifications
1.2.3
Paper Specifications Table 1-4. Cut Sheet Paper Specifications
Table 1-5. Envelope Specifications
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&
-P
Figure 1-3. Printable Area for Cut Sheet
c
Figure 1-4. Printable Area for
Table 1-6. Adjust Lever Setting
Figure 1-5. Adjust Lever 1.2.4 Ink Cartridge Specifications
-
Black
1.2.5 Electrical Specifications Table 1-7. Rated Electrical Ranges
1.2.6 Environmental Conditions Table 1-8. Acceptable Environmental Conditions
Range
Temperature/l=lumidity
Figure 1-6.
\
1.3 INTERFACE SPECIFICATIONS
L.&
1.3.1 Serial interface Specifications
L_-
Figure 1-7. Data Transmission Timing
Table 1-9. Signal and Connector Pin Assignments
c
for
.
Parallel Interface
1.3.2 Parallel Interface Specifications
X-OIVX-OFF
and
DTR
Table 1-10.
Un
1.4.1 Control Panel
~.
Buttons
I
1.4.2 Panel Operation at Power On
1.4.3 Default Settings
1.4.3.1 Default Setting Items
ESC
Printing Direction and
1-14.
1.4.3.2 Changing the Default Settings
Table 1-15. Language Selection
10
Table 1-16. Feature Selection
Table 1-17. Character Table Selection
c.
,
.
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1.4.4 Error Conditions
Table 1-18. Error Indications
1.4.5 Printer Initialization
Initialization
1.4.5.2
.,
1---1
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Figure 1-13. Housing
Chapter 2 Operating Principles
Table of Contents
2-i
Head). . . . . . .
2.4
List of Figures
List of Tables
2.1 OVERVIEW
2.2 OPERATING PRINCIPLES OF THE PRINTER MECHANISM
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:
Figure 2-1. Printer Mechanism
Manual 2.2.1 Printer Mechanism
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Figure
2-2.
Structure of
Normal state
Injectir state
Figure 2-3. Principles of the Printing Operation
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Figure
2-4.
Microwave Mode Operation
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Carriage Drive Mechanism
Table 2-1. Carriage Drive Motor Specifications
Table 2-2. Drive Terms
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Table 2-5. Drive Terms
Figure 2-7. Paper Feed Mechanism
2.2.4 Ink System This
fbllowing
A
1 [
a)br/blackhead) . . . . . -
Clatch -,
Figure
h-+
Page
Table 2-6. Pump Mechanism Operation
0:
u
0:
Figure 2-13. Pump Operation
Opemting
1-
(i
Wiper(Cleaning
Hook
2.3 OPERATING PRINCIPLES OF THE ELECTRICAL CIRCUITS
Elecrical
Figure 2-16. Block Diagram of the
Circuit 2.3.1 Operating Principles of the Power Supply Circuit
d
is fed back to the primary switching circuit through a
return
Biock
2-17. Power Supply Circuit
=ery
Figure 2-18. Main Control Circuit Block Diagram
2.3.2.1 Reset Circuits
contains
Figure 220.
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Figure 2-19. Reset 2.3.2.2 Sensor Circuits
mechanism to determine whether there is paper in the printer or not. A LOW level
the signal
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w
Carriage Motor Drive Circuit
and speed
v-+-l
a
Figure 2-22. Serial Data Transfer Procedure
2.3.2.4
Paper Feed Motor Drive Circuit
Table 2-9. Paper Feed Motor Drive Modes
Figure 2-23. Paper Feed Motor Drive Circuit Diagram
c)
I--d
2S.2.5
64-bit parallel
CLAT
DMA
Controller
Figure 2-26.
DMA
Controller Operation
D-RAM Refreshment Controller
(CPU-2CAS
Figure 2-27. D-RAM Cycle Timings
CPU H8 (ICI) D-RAM (IC5) 79 28
14F
HWR 80
OCAS LWR,
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Figure 2-29. Relation of Ink System & Carriage Operation
2.4.1 Ink Operations
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2.4.1.1 Power On Operation
:::::;::;::;;;;rmd
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Cleaning Selection Mode
CL I (Normal Cleaning):
CL3
CL2
(Power Cleaning):
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2.4.1.5 Print Start
62
2.4.1.4 Power Off Operation
Sets the
2.4.1.6 Refresh Operation
2.4.1.7
the ink
Standby Operation
2.4.1.8 Fail Absorbing Operation
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4.
than
(
button
Wiping Operation
2.4.1.10
2.
4.
2. Sets
e)
7
2.4.1.16 Carriage Lock Set
(Performed when
start:
=
Ink Level Counter R (On the RAM) (Monochrome= Rb,
start:
(Blaclq
Timer
Fail
Flushing Counter (Black,
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m,
4
CMY=
4. CL
Chapter3 Disassembly and Assembly
MAIN
3.1 OVERVIEW
3.1.1 Precautions for Disassembling the Printer
Disassembly and Assemb/y Stylus Color Service
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3.2 DISASSEMBLY AND ASSEMBLY
Mi3nual
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C137
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:.[[[[[[[
from
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Figure 3-6. Main Controller Removal
3.2.4 Printer Mechanism
(M-4AIO)
Removal
CBN(M4X13)
Figure 3-7. Printer Mechanism
3.2.5 Printer Mechanism Disassembly
Printhead
Wc:
3.2.5.1
Unit Removal
Page
3.2.5.2 Carriage Unit Removal
CBN(0)(
Hgure
Figure 3-10. Front Frame Removal
{
3-10
Pump Unit Removal
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Figure 3-12. Pump Unit Removal
CBN(M3X5)
Cleaner Head Replacement
f- .
CR Motor Removal
Figure 3-14. CR Motor Removal
PF Motor Removal
Figure
3-15.
PF Motor Removal
k.
Figure 3-16. Carriage Home Position Sensor Removal
3.2.5.8 PE Sensor Removal
Bottom Frame
Figure 3-17. PE Sensor Removal
II
Figure 3-19. Paper Feed Roller Assembly Removal
Paper
Assembly Removal
Tension Roller Assembly
!
CBN(M3X5)
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Chapter 4
Adjustments
I
head) . . . . . . . . . . . . . . . . . . . . .
Table of Contents 4.1 OVERVIEW
4.1 OVERVIEW
Table 4-1. Required Adjustments
Head gap
4.1.1 Destination Data Writing Operation
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.
Bi-D
4.1.2
(Bidirectional Printing) Alignment Adjustment
4.1.3 Head Gap Adjustment
I
1
d
Figure 4-1. Head Gap Adjustment Sample
Stylus Color Service
o
Rev. A4-5
c1
E 0.25
BK;
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J
Figure 4-5. Spacer Selection
Figure 4-6. Removing the Rubber Cap
II
o
Figure 4-7. Spacer
(Spacer Angular
I
Angular Replacement Position) Replacement Method
! %-
Figure 4-8. Black-Color Head Vertical Adjust
Confirmation Pattern PMting
Conception
black- color head vertical adjustment is based upon the black head angle.
Figure 4-10. Removing the Rubber Cap
CMY: 1020627).
1020626
o
(Linear Spacer Replacement Position)
4.1.6 Color Head Angle Adjustment
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Figure 4-13. Color Head
m-
L
+*~
*T
/ /
a
Angular Spacer (For Color Head)
D,
angular spacer YMC
angular spacer YMC-B
I
10.
t
41?E5iirTu~J~@
Figure 4-17. Spacer Angular Replacement Method(YMC)
4.1.7 Platen Gap Adjustment
Table 4-2. Gap and Adjustment Direction
Cw
Ccw
Cw
Figure 4-18. Adjusting the Paper Gap
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Figure 4-19. Confirming the Gap 4.1.8 Internal Timer Reset Operation
Chapter 5 Troubleshooting
5.1 OVERVIEW
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Figure 5-1. Troubleshooting Process Table 5-1. Motor Resistance
Flowchart
Table 5-2. Sensor Status
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. . . :
5.2
UNIT LEVEL TROUBLESHOOTING
Table 5-4. Symptom and Problem
5.2.1 Printer does not operate at power on
c1
START / Mthea)rlect W**
+ .: ----- f
Stylus Co/or service Manual Troubleshooting
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AS-5
YES
v
(See
the
5.2.2 Error is detected
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END
Stylus Color Service
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5.2.4
4
Twbleshootina
Printer does not feed the paper correctly m
START
END
Page
UNIT REPAIR -
C137
5.4
MAIN BOARD
table
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1
Amtud
5.5 UNIT REPAIR -PRINTER MECHANISM (M-4A1O)
Any problems related to W printer
Foreign Mmually
PrhMer
Repair of the
Table 5-7. Repair of the Printer Mechanism (Cont.)
Tbubkshodng
(-J
Table
Chapter 6 Maintenance
6.1 PREVENTIVE MAINTENANCE
AND ADHESIVE
LUBRICATION
6-1 6.2 SERVICE MAINTENANCE
6.1 PREVENTIVE MAINTENANCE
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6.2.1
mnuai
6.2 SERVICE MAINTENANCE
6.3 LUBRICATION
AND ADHESIVE
(lo)
Table 6-1. Recommended Lubricants
Table 6-2. Lubrication and Adhesive Points
Page
Page
Appendix
A.1
EXPLODED DIAGRAM
A.4
A-16
q-cl-tor
Components
Table A-1. Connector Summary
Pin
Pin Assignments -
Table A-2. Connector
Locatfon
Table A-3. Connector Pin Assignments - CN2
Table A-4. Connector Pin Assignments -
Table A-5. Connector Pin Assignments -
CN3
CN4
Connector
Table
Table A-9. Connector
A-10. Connector Pin Assignments -
Table A-8. Connector Pin Assignments -
I/o
CN12
I/o
StY/us
Color Service Manual Amendix
A-15
II
Figure A-3. C137 MAIN
A-9
Service Manual
Board Circuit
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tl
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T
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h-
-n-=
(
7)7
SW6
ax
4
1 .+
-w-
!5
!4
R
Figure A-8. C137 PSB/PSE Board Component Layout
EPSON OVERSEAS MARKETING LOCATIONS
Stylus Color service