Epson LX-800 Service manual
LX-HOO
TECHNICAL MANUAL
—
.—
EPSON
EPSON is a registered trademark of SEIKO EPSON CORPORATION.
IBM is a registered trademark of International Business Machines Corporation.
NOTICE
‘ 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 subject to change without notice.
● All efforts have been made to ensure the accuracy of the contents of this manual.
However, should 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 their consequences.
@
Copyright 1987 by SEIKO EPSON CORPORATION
Nagano, Japan
-i-
REV.-A
PRECAUTIONS
Precautionary notations throughout the text are categorized relative to: 1 ) personal injury, and 2) damage
to equipment.
DANGER
WARNING Signals a precaution which, if ignored, could result in damage to equipment.
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.
DANGER
1. ALWAYS DISCONNECT THE PRODUCT FROM BOTH THE POWER SOURCE AND THE
HOST COMPUTER BEFORE PERFORMING ANY MAINTENANCE OR REPAIR
PROCEDURE.
2. NO WORK SHOULD BE PERFORMED ON THE UNIT BY PERSONS UNFAMILIAR WITH
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 UNIT TO A POWER SOURCE UNTIL INSTRUCTED TO DO SO. WHEN
THE POWER SUPPLY CABLE MUST BE CONNECTED, USE EXTREME CAUTION IN
WORKING ON POWER SUPPLY AND OTHER ELECTRONIC COMPONENTS.
WARNING
1. REPAIRS ON EPSON PRODUCT SHOULD BE PERFORMED ONLY BY AN EPSON-CERTl-
FIED 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 THE AVAILABLE POWER
SOURCE, DO NOT CONNECT IT TO THE POWER SOURCE.
3. ALWAYS VERIFY THATTHE EPSON PRODUCT HAS BEEN DISCONNECTED FROM THE
POWER SOURCE BEFORE REMOVING OR REPLACING PRINTED CIRCUIT BOARDS
AND/OR INDIVIDUAL CHIPS.
/.LP
4. IN ORDER TO PROTECT SENSITIVE
DISCHARGE EQUIPMENT, SUCH AS ANTI-STATIC WRIST STRAPS, WHEN ACCESSING INTERNAL COMPONENTS.
5. REPLACE MALFUNCTIONING COMPONENTS ONLY WITH THOSE COMPONENTS
RECOMMENDED BY THE MANUFACTURER; INTRODUCTION OF SECOND-SOURCE
ICS OR OTHER NONAPPROVED COMPONENTS MAY DAMAGE THE PRODUCT AND
VOID ANY APPLICABLE EPSON WARRANTY.
CHIPS AND CIRCUITRY, USE STATIC
- ii -
PREFACE
This manual describes functions, theory of electrical and mechanical operations, maintenance, and repair of the LX-800.
The instructions and procedures included in this document are intended for
the experienced repair technician, who should pay attention to the precautions
on the preceding page. The chapters are organized as follows:
REV.-A
—
Chapter 1 —
Chapter 2 —
Chapter 3 —
Chapter 4 —
Chapter 5 —
Chapter 6 —
Provides a general product overview, lists specifications, and
illustrates the main components of the printer
Describes the theory of printer operation
Discusses the options
Includes a step-by-step guide for product disassembly, assembly, and adjustment
Provides Epson-approved techniques for troubleshooting
Describes preventive maintenance techniques and lists lubricants and adhesives required to service the equipment
● The contents of this manual are subject to change without notice.
-
iv -
REVISION SHEET
I
REVISION I DATE ISSUED
CHANGE DOCUMENT
1st
issue
1-1, 5, 8, 12 through 18
2-2,11, 13,28,30,38 through
42
4-1, 13, 17, 19
5-1, 2, 6
6-1
A-2, 17, 18
-v-
TABLE OF CONTENTS
REV.-A
CHAPTER
CHAPTER 2. OPERATING PRINCIPLES
CHAPTER 3. OPTIONAL EQUIPMENT
CHAPTER 4.
CHAPTER 5.
CHAPTER 6. MAINTENANCE
APPENDIX
1.
GENERAL DESCRIPTION
DISASSEMBLY, ASSEMBLY, AND ADJUSTMENT
TROUBLESHOOTING
-
vi -
CHAPTER 1
GENERAL DESCRIPTION
REV.-A
—. —
FEATURES
1.1
1.2
INTERFACE
SPECIFICATIONS
1.3
OPERATING CONTROLS
1.4
1.4.1
1.4.2
1.4.3
1.4.4
1.4.5
1.4.6
MAIN COMPONENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.5
1.5.1
1.5.2
1.5.3
1.5.4
1.5.5
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Dip Switch and Jumper Settings
Control Panel (and Auto Sheet Load Function) . . . . . . . . . . . . . . . . 1-14
Self Test and Hexadecimal Dump Functions . . . . . . . . . . . . . . . . . . . . 1-15
SeiecType
Buzzer and Error Functions
Printer Initialization and Default Values
Printer Mechanism
ROC Filter Unit
ROCX Board Unit
LCPNL Board Unit
Housing
Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Model-3A10
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
—.
. . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-1
1-3
1-6
1-12
1-12
. 1-16
1-17
1-17
. 1-18
1-18
1-19
1-20
1-20
1-21
Fig. 1-1.
Fig. 1-2.
Fig. 1-3.
Fig. 1-4.
Fig. 1-5.
Fig. 1-6.
Fig. 1-7.
Fig. 1-8.
Fig. 1-9.
Fig. 1-10.
Fig. 1-11.
LIST OF FIGURES
Exterior View of
Exterior View of
Data Transmission Timing of 8-Bit Parallel Interface.... 1-3
57-30360 36-Pin Connector
Printhead Pin Configuration
Printable Area for Cut Sheet Paper
Printable Area for Roll Paper
Printable Area for Fan Fold Paper
Control Panel
SelecType Flow Chart
Mode13Al O Printer Mechanism
LX-800
LX-800 with Tractor Unit. . . . . . . . . . . . . . . . . . . . . . . 1-2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
l-i
1-1
1-3
1-6
1-9
1-9
1-1o
1-14
1-16
1-18
REV.-A
Fig. 1-12. ROC Filter Unit
Fig. 1-13.
Fig. 1-14. ROCX Board Unit
Fig. 1-15.
Fig. 1-16. Housing
ROC Filter Unit
LCPNL Board Unit
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
(120V
(220V/240V
LIST OF TABLES
Version)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Versions)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-19
1-20
1-20
1-20
1-21
Table 1-1. LX-800 Options
Table 1-2. Connector Pin Assignments and Signal Functions . . . . . . . . 1-4
Table 1-3. Printer Select/Deselect
Table 1-4. Printer Speed, Character Size, and Column Width . . . . . . . . 1-7
Table 1-5. Type of Paper
Table 1-6. DIP Switch Settings
Table 1-7. International Character Set
Table 1-8. DIP Switches Factory Settings
Table 1-9. Jumper Setting
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
(DC1/DC3)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Control . . . . . . . . . . . . . . . . . . . . . 1-5
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-2
1-8
1-12
1-13
1-13
1-13
Iii
REV.-B
1.1 FEATURES
The LX-800 is a multifunctional and high speed serial dot impact printer with a compact body and the
low price.
Features include:
●
180
cps
maximum speed (draft-elite), 150
●
Upward compatibility with the LX-86
NLQ
●
Built in two
●
Direct selection of
●
Built in IBM graphics characters
●
Super/Subscript, Italics, and Elite modes can be supported in
Automatic sheet loading function
●
3K-byte
A
●
●
Pull tractor feeding
●
Optional interface for the EPSON #81 XX series
input buffer for improved throughput from the host computer
fonts (Roman and Saris-serif)
NLQ/Draft modes, and easy selection of 4
cps
(draft-pica)
typestyle
NLQ
modes with
SelecType
controls
Tw=models
of the LX-800 are manufactured. The model for
t~e U.S
and Australia uses printer cover
A and the model for all countries except the U.S. and Australia uses printer cover B.
Figures 1-1 and 1-2 show the external view of the LX-800. Table 1-1 lists the options.
(Printer cover A)
(Printer cover B)
Fig. 1-1. Exterior
View of LX-800
1-1
REV.-A
(Printer Cover A)
Fig. 1-2. Exterior View
I
Option No.
#83 10
#81 33
#8 143
#8 145
#81 48
#8 165
(Printer Cover B)
LX-800 with Tractor Unit
of
Table 1-1. LX-800 Options
I
Description
Roll Paper Holder
APPLE II Intelligent Interface
New Serial Interface
RS-232C/Current Loop Type 2 InterFace
Intelligent Serial Interface
Intelligent IEEE-488 Interface
1-2
REV.-A
1.2 INTERFACE
The LX-800 has a 8-bit parallel interface as a standard. The specifications for the 8-bit parallel interface
are as follows:
Data Format:
Synchronization:
Hand Shaking:
Logic Level:
Data transmission
Connector:
timing:
8-bit parallel
By STROBE pulse
By both
ITL
ACKNLG
(LS type) compatible
See Figure 1-3.
57-30360 (AMPHENOL) or equivalent (See Figure 1-4.)
BUSY
ACKNLG
OATA
STROBE
0.5JAS
min.
0.5JAS
1=
min. min.
O..sus
NOTE: Transmission time (rising and falling time)
Fig. 1-3. Data Transmission Timing
and BUSY, or either of them
“w
of every input signal must be less than
for 8-Bit Parallel Interface
0.2Ks.
1. 19.
20.
2.
3.
4.
5.
6. 24.
7.
e.
9. 27.
10
11
12
13 31.
14 32.
15 33. GNO
16
17
18
GNO
Z
1.
GNO
22. GNO
23.
GNO
GNO
25.
GNO
26. GNO (
GNO ( Pair
2S.
GNO (
29. GND ( Pair
30. GNO ( Pair
m
m
34. NC
35.
+5V
m
36.
Fig.1-4. 57-30360 36-Pin Connector
GNO
( Pair with 1.)
( Pair w;tn2.)
( Pair w;th3.)
( Pair wnh4.)
( Pair
( Pair w;th6.)
( Pair witn7.)
Pair w;th
Pair w:th
w;tn5.)
w;tn9.)
with
witn
S.)
10.)
11. )
12.)
1-3
REV.-A
Table 1-2 shows the connector pin assignments and signal functions of the 8-bit parallel interface.
Table 1-2. Connector Pin Assignments and Signal Functions
~in
No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
9 to 30
Signal Name
STROBE
DATA 1
DATA2
DATA3
DATA4
DATA5
DATA6
DATA7
DATA8
ACKNLG
BUSY
PE
SLCT
AUTOFEED-XT
—
GND
Chassis
GND
—
GND
Return Pin No.
19
20
21
22
23
24
25
26
27
28
29
30
—
—
— —
—
— —
— —
— —
DIR
In
In
In
In
In
In
In
In
In
out
out
out
out
In
—
Functional Description
Strobe pulse to read the input data. Pulse width
be more than
must
falling edge of this signal.
Parallel input data to the printer.
“HIGH” level means data “ 1“.
“LOW” level means data “O”.
This pulse indicates data are received and the
printer is ready to accept next data.
Pulse width is approx. 12
HIGH indicates printer can not accept next data.
0.51Js.
Input data is latched after
KS.
HIGH indicates paper-out. This signal is effective
only when
Always
3.3 K ohms register.)
If the signal is “LOW” when the printer is initialized,
a line feed is automatically performed by input of
“CR” code. (Auto LF)
Not used.
Ground for twisted-pair grounding.
Chassis ground level of printer
Not used.
Ground for twisted-pair grounding.
ERROR
signal is
“LOW”.
“HIGH” output. (Pulled up to
+5V
through
31
32
33
34
35
36
I NIT
ERROR
GND
—
—
SLCT-IN
16
—
—
—
—
—
In
out
.
—
out
In
1-4
Pulse (width:
printer initialization.
LOW indicates that some error has occurred in the
printer.
Ground for twisted-pair grounding
Not used.
Always “HIGH”. (Pulled up to
3.3k-ohm register.)
If the signal is “LOW” when printer is initialized, the
DC l/DC3 control is disabled.
50MS
min., active “LOW”) input for
+5V
through a
REV.-B
NOTES 1. “Return” denotes a twisted pair return line connected to
2. All interface conditions are based on TTL levels. Both the rise and fall times of all signals
3. Refer to the Parallel Interface Timing Chart for the timing of the signals.
4. Data transfer protocol must not ignore the
5. The AUTO FEED XT and
6. Printing tests, including those of the interface circuits, can be performed without using
7. The PE signal is valid when the ERROR signal is LOW.
—
SLCT
IN Signal State
at Initialization
HIGH
the printer to the host, use twisted pairs for each signal.
the shield to GND in order to reduce interface.
must be less than
either after recognizing the
the DIP switch or jumper.
external equipment: set interface connector data lines 1-8 to the desired code (a floating
signal will be a logical 1, and a grounded signal will be a O) connect the
to the STROBE signal.
Table 1-3. Printer Select/Deselect
I
0.2Ks.
Dcl/Dc3
DC 1
DC3
ACKNLG
ACKNLG
SLCT
IN signals are valid when they are not fixed to LOW level by
I
signal or when the BUSY signal is LOW.)
(DC—1/DC3)
Printer
Select/Deselect
Select
Deselect
Shield
or BUSY signal. (Data can be transferred
I
Enable
Enable (Waits for a DC1. Input data is ig-
nored until a DC 1 code is received.)
signal
ground. When interfacing
the twisted pairs, and connect
ACKNLG
Control
Data entry
signal
LOW
DC1
DC3 Select
Select
Enable
Enable
1-5
REV.-A
1.3 SPECIFICATIONS
This chapter describes the specifications of the LX-800 printer.
●
General Specifications
Printing method:
Pin configuration:
Pin diameter:
Dot Pinch:
Serial impact dot matrix
9 wires (see Figure 1-5)
0.29 mm
0.35 mm (1/72 inch)
#1
(
)
#2
(
)
#3
#4
<
>
#5
#6
( )
i
0.29mm
t
0.35mm (1 /72”)
t
Printing direction:
Text mode:
Bit-image mode:
Dot matrix:
Character sets:
Fonts:
Printing speed:
Character size:
Column width:
#7
#8
#9
Fig. 1-5. Printhead Pin Configuration
Bi-directional with logic seeking
Uni-directional (left to right)
9 X 9 (Draft)
11 X 18
6 X 8 (Graphics)
96 ASCII characters
96 Italic characters
32 International characters
32 International Italic characters
32 Graphics characters
96 IBM Graphics characters
Draft,
See Table 1-4
See Table 1-4
See Table 1-4
480 dots/line at 60 dots/inch (Bit-image)
(NQL)
NLQ-Roman,
Saris-serif
—.—
1-6
Font
Draft
(Pica)
Draft
(Elite)
NLQ
Super-
sub-
script
...—
Type Style
Normal
0 —
— .
— —
o —
—
—
o —
0 —
Table 1-4. Printing Speed, Character Size, and Column Width
Double
Width
o
0
0
o
—
Empha-
sized densed
Con-
— —
— —
0 —
0 —
—
—
— —
— —
—
—
—
— —
o
o 64
o
Printing Speed (CPS)
150
75
75
37
128
180
90
150
25
Charecter
Width
Size (mm)
Height
2.1
4.2
2.1
4.2 3.1 40
1.05
2.1
2.1
4.2 3.1 48
1.05
3.1 80 10
3.1
3.1
3.1
3.1 66
3.1
3.1
1.6
Column Width
(maximum
cters/LinsCPL)
40
80
132
96
160
Chara-
Pitch
(meximum
Characters
/inch-CPl)
5
10
5
17
8.5
12
6
20
REV.-A
Line spacing: 1/6” or Programmable (n/2 16“)
Line feed speed:
(1 line = 1/6”)
Approx. 95ms/line
Approx. 75ms/line
(Line feed)
(Form feed)
Paper feed method: Friction feed or Tractor feed
Paper path: From rear of printer
● Paper Specifications
Type of paper:
See Table 1-5
1-7
REV.-B
Table 1-5. Type of Paper
Size
Thickness
Copies
Weight
Cut sheet
(Width)
182 mm to 216 mm
7. 15“ to 8.5”
Fan-fold paper
(Width)
101 mm to 254 mm
4“ to 10”
(Length)
Max. 305 mm
Max. 12“
0.06 mm to 0.1 mm
Max. 0.25 mm
1 original +2
52g/m2 to 82g/m2 (1 sheet)
52g/m2 to 82g/m2
(2 sheets)
35g/m2 to 58g/m2
(3 sheets)
35g/m2 to 58g/m2
for 2 sheets
+
35g/m2 to 47g/m2
for 1 sheet
Roll paper
(Width)
& 3 mm
216
8.5” & 0.12“
(Diameter of roll)
Max. 127 mm
Max. 5“
0.07 mm to 0.09 mm
52g/m2 to 64g/m
2
Feeding method Friction feed
Precautions
1. Do not use continuous
form or copy paper.
2. Dismount the Tractor
unit.
Tractor feed Friction feed
1. Release the friction 1. Use the Roll paper
mechanism using the
holder.
release lever. 2. Dismount the Tractor
2. Use the pressure
sen-
unit.
sitive paper for copying. Be sure that per-
forations have a smooth
finsh.
1-8
REV.-A
Printable area:
—
See Figures 1-6 through 1-8
7.1 5“ - 8.50/182 mm -
0.1 2“, 3
or more
0.87”, :
T
or
1
2“”,
305 mm
1
or
7
.2’.
g
n
1
,3(
mor
I-
I
mm
m
lm
ABC
T
ABC
L
F
r
i
n
t
a
b
t
e
a
r
e
a
L
216 mm
Printable area
.—
T
J
XYZ
XYZ
I
I
0.1 2“, 3 mm
=more
0.1
2“/3 mm–
or more
0.98”/25 mm
or more
Fig. 1-6. Printable Area for Cut Sheet Paper
8.5”, 216 mm
Printable area
!
ABC
XYZ
●
‘or
0.1
more
2“/3
mm
Fig. 1-7. Printable Area for Roll Paper
1-9
REV.-A
4“ -
10 ”/101 mm - 254 mm
Printable
area
0.35 ”/9 mm
or more
0.35 ”/9
or more
/
mm
Printabh
area
L
Printable area
7
o
0
0
0
0
0
0
0 ABC
1-
o
0
0
-----------
4
0
0
0
------
------
o ABC
o
T
0
i
0
0
0
0
0
L:
0.75”/19
1.02”)26 mm
0.75”/19
R:
0.94”/24 mm (Paper width is more than 9.5 ”/241 mm)
mm
[PaDer
width is less than 9.5”/241 mm)
~Paper
width is more than 9.5 ”/241 mm)
mm (Paper width is less than 9.5 ”/241 mm)
XYZ
1
----
XYZ :
7
R
0
0
0
0
0
0
:
o
0
0
0
0
0
0
0
0
0
0
0
Ribbon Cartridge
Cartridge number:
Color:
Life:
Electrical Specifications
Power Voltage:
Frequency range:
Power consumption:
Insulating resistance:
Dielectric strength:
Fig. 1-8. Printable Area for Fan Fold Paper
#8750
Black
3 million characters (14 dots/character)
+
120VAC
220/240VAC *
59.5Hz
49.5Hz to
Max.
70VA
10%
10%
to 60.5Hz (120VAC)
60.5Hz
(220/240VAC)
More than 10M ohms
(between the AC line and chassis)
KVAC
1
rms/minute or 1.2KVAC rms/second
between AC line and chassis (120V)
kVAC
1.25
rms/minute or 1.5
between AC line and chassis
kVAC
rms/second
(220/240V)
1-1o
● Environmental Specifications
Temperature:
Humidity:
Resistance to shock:
Resistance to vibration:
● Reliability
MCBF:
MTBF:
Life of
● Safety Approvals
. safety Standards:
RFI:
printhead:
–30”C
5°C to
5% to 85%RH, no condensation (Storage)
10% to
2G, 1 ms (Storage)
IG, 1 ms (Operating)
0.50G,
0.25G, max
3 million lines (Printer mechanism except the
4000 hours
200 million strokes/needle
UL 478 (U. S.A.)
CSA 22.2 No. 0.154 (Canada)
VDE
FCC class B (U. S.A.)
VDE 0871 (West Germany)
to 60 ”C/–22°F to 149°F (Storage)
35”C/4
max. 55Hz (Storage)
0806 (West Germany)
1“F to 95°F (Operating)
80%RH, no condensation (Operating)
55Hz (Operating)
—
REV.-A
printhead)
● Physical
Dimensions:
(Refer to Figure A-19)
Weight:
91 mm (height)
377 mm (width)
399 mm (width including paper feed knob)
308 mm (depth)
5.1 kg
1-11
REV.-B
1.4 OPERATING CONTROLS
This section describes the operating controls of LX-800 printer.
1.4.1
DIP Switch and Jumper Settings
The DIP switches that users can set are SW1 and SW2. These switches are positioned at the rear center
of the printer and have the functions shown in Tables 1-6 through
switches is read only when at power on or at input of the INIT signal).
Table 1-6. DIP Switch Settings
1-8. (Note: the status of the DIP
DIP SW
1-1
1-2
1-3
1-4 I
1-5 I Printing quality select
1-6
1-7
1-8
2-1
2-2 Cut sheet feeder mode
2-3 1“ skip over perforation Valid
2-4 AUTO FEED XT control
Typeface select
ZERO font select
Character Table select
Paper-out detection
International character set select
Page length select
Function ON OFF
Condensed
I
I
I
Fix to LOW
0
Graphic
Valid
NLQ
12“
Valid
I
I
I
See Table 1-7
Depends on ex-
ternal signal
Normal
0
Italic
invalid
Draft
1 1“
Invalid
Invalid
1-12
?-
Table 1-7. International Character Set
Country
SW 1-6 Sw 1-7
REV.-B
SW 1-8
Country
U.S.A.
FRANCE ON
GERMANY
U.K.
DENMARK
SWEDEN
ITALY
SPAIN
DIP SW No.
ON
ON
ON
OFF
OFF
I
OFF
OFF
Table 1-8. DIP Switches Factory Settings
1-1
1-2
1-3
1-4 1-5
ON
ON
OFF
OFF
ON
ON
I
OFF
OFF
1-6
I
1-7
ON
OFF
ON
OFF
ON
OFF
ON
OFF
1-8
I
2-1
2-2 2-3 2-4
U. S.A., Southeast Asia,
Middle and
Germany,
Northern Europe
U. K., Australia
France, Italy, Spain
Jumper J 1 on the ROCX board has the function and factory setting shown in Table 1-9.
Jumper
J1
Near East
Function
SLCT IN control
OFF OFF OFF OFF OFF ON
OFF OFF
OFF OFF
OFF OFF ON OFF OFF ON
Depends on external signal Fix to LOW
OFF
OFF OFF ON
OFF
OFF OFF ON
Table 1-9. Jumper Setting
Open Close Factory setting
ON ON OFF OFF
OFF ON ON OFF
OFF OFF OFF OFF OFF
ON ON OFF OFF
OFF OFF
OFF OFF
OFF
OFF OFF
Open
1-13
REV.-B
1.4.2 Control Panel (and Auto Sheet Load Function)
Figure 1-9 shows the control panel of LX-800 printer.
a
b
c
d
e
f
9
Fig. 1-9. Control Panel
The functions of the LEDs and switches are:
POWER LED (green)
a.
Lights when the power switch is turned on and AC power is applied.
READY LED (green)
b.
Lights when the printer is ready to receive data.
PAPER OUT LED (red)
c.
Lights when the printer runs out of paper.
ON LINE LED (green)
d.
Lights when the printer is ON-LINE.
ON/OFF LINE Switch (non-locking push switch)
e.
Switches between the ON-LINE and OFF-LINE modes.
The printer is automatically set ON-LINE and becomes ready when power is turned on. If the printer
is set OFF-LINE, printing is stopped and the printer enters the busy state.
NLQ/FORM FEED Switch (non-locking push switch)
f,
●
When this switch is pressed once in the OFF-LINE mode, the paper is advanced vertically to the
top of form on the next page.
●
When this switch is pressed in the ON-LINE mode, the
NLQ-Roman
or
NLQ-Sans-serif
fonts are
selected, and the buzzer sounds to inform the user which font is selected.
NLQ-Roman:
NLQ-Sans-serif:
Two beeps
Three beeps
1-14
g. DRAFT/LINE FEED and AUTO LOAD Switch (non-locking push switch)
●
When this switch is pressed once in the OFF-LINE mode, the paper is advanced vertically one line,
and the paper advanced continuously while this switch is pressed.
When this switch is pressed in the ON-LINE mode, the Draft font is selected, and beeps once a
●
buzzer to inform the Draft font is selected.
Cut sheets are automatically loaded when the paper is placed at the sheet guide, printer is paper
●
out, OFF-LINE state and the this switch is pressed.
1.4.3 Self Test and Hexadecimal Dump Functions
The conditions of LX-800 may be checked via the self test functions. The self test checked:
● Circuit
● Printer mechanism
● Printing quality
● ROM (firmware) code number
The code number of ROM is printed on the first line of the self test.
start
To
DRAFT/LINE FEED or
the self test in either the Draft mode or
NLQ/FORM FEED switch, respectively. In the
and Saris-serif font are printed every other line. When the DIP switch 1-5 set to on
NLQ
mode self test is performed, no related switches. To stop the self test, turn the power off by power
NLQ
mode,+urn the power on while pressing the
NLQ
self test mode, both Roman font
(NLQ
mode), only
switch.
REV.-B
The conditions of data transmission between LX-800 and the host computer may be
checkedvia
hexadecimal dump functions. To set the hexadecimal dump mode, turn the power while pressing
the
the
both LINE FEED and FORM FEED switches. Then the message “Data Dump Mode” is printed.
The printer prints 16 hexadecimal values, followed by the corresponding ASCII characters. If there is
no corresponding printable characters for a value (e.g. a control code), a period (.) is printed. One line
is printed for each set of 16 values received, and any remaining data (less than 16 values) can be printed
by pushing the ON/OFF LINE switch.
To cancel the hexadecimal dump mode, turn the power off by power switch.
1-15
REV.-B
1.4.4
SelecType is a feature of the LX-800 which permits type style programming via the control panel
switches without software assistance.
In the
Figure 1-10 shows the operation flow chart of
SelecType
SelecType mode,
● Emphasized
● Double-strike
● Condensed
● Elite
Function
following 4 type styles can be selected:
SelecType function:
< ENTER >
Hold down ON/OFF LINE SW, and
press
NLQ/FORM
er beeps once and ON-LINE LED
starts blinking.)
FEED SW. (Print-
<
I
Press ON\OFF LINE SW the number of times indicated below for the mode. (Pay attention to the number
of beeps the printer makes when the buzzer sounds.)
1
Emphasized 3 Condensed
I
2 I Double-striked
Select the type style >
<
Set type style >
Press FORM FEED SW.
N
< EXIT >
I
Press LINE FEED SW.
I
4 I Elite
I
]Y
I
I
I
OFF-LINE
I
I
I
Fig. 1-10. SelecType Flow Chart
1-16
1.4.5 Buzzer and Error Functions
The buzzer rings under the following circumstances:
●
When a BEL code is sent to the printer, the buzzer
rings once (for 0.1 sec.).
●
When the
rings twice (for 0.1 sec. each, with 0.1 sec. pause between rings).
When the
●
rings three times (for O. 1 sec. each, with O. 1 sec. pause between rings).
●
When the Draft font is set using the DRAFT/LINE FEED switch, the buzzer
rings once (for O. 1 sec.).
●
When the printer enters the
rings once (for O.
When paper out is detected, the buzzer
●
rings eight times (for 0.5 sec. each, with 0.5 sec. pause between rings).
When abnormal carriage operation is detected (hardware error), the buzzer
●
rings five times (for 0.5 sec. each, with 0.5 sec. pause between rings).
●
✍
-W—hen abnormal voltage is detected (hardware error), the buzzer
rings five times (for 0.5 sec. each, with 0.5 sec. pause between rings).
NLQ
Roman font is set using the FORM FEED switch, the buzzer
NLQ
Saris serif font is set using the NLQ/FORM FEED switch, the buzzer
SelecType mode, the buzzer
1
sec.).
.—
REV.-B
When the paper end sensor detects paper out, the state of the interface changes as follows:
~
ERROR signal
BUSY signal
signal+
PE
The printer enters an error state when any of the following occurs:
a. Home position is not detected after the printer mechanism has been initialized (home
seek).
b. The
When the printer enters an error state, the printer stops the printing, and the state of the interface
changes as follows:
1.4.6 Printer Initialization and Default Values
The LX-800 initialized when any of the following occurs.
●
●
When
a.
b.
c.
d.
e.
f.
9“
i.
+24V
ERROR signal
BUSY signal
The power switch is turned on.
Intetiace signal INIT goes low.
the printer is initialized, the following operations are performed:
Seek to carriage home position.
Set to ON-LINE mode.
Clear the all buffers.
Set the line spacing to 1/6 inches.
Set the page length to 11 or 12 inches, according to the DIP switch.
Clear all vertical tab positions.
Set the horizontal tab position to every 8 columns.
Set the print mode according to the DIP switches.
LOW
~
HIGH
HIGH
voltage (which is used to drive the printhead and motors) rises to
~
LOW
~
HIGH
+27V
position
or more.
1-17
REV.-B
1.5 MAIN COMPONENTS
The LX-800 consists of the following components:
● Printer Mechanism
● ROC Filter Unit
● ROCX Board Unit
LCPNL
●
● Housing
Board Unit
Model-3A10 (include the Tractor Unit)
1.5.1 Printer Mechanism
The Model-3A10 printer mechanism was developed expressly for use with LX-800 printer: the
components include a carriage motor, carriage mechanism, paper feed motor, paper feed mechanism,
ribbon feed mechanism, printhead, sensors, and the tractor unit. For the tractor unit, there are two tabs
on both side frames to allow the printer cover to float slightly when tractor feeding is performed.
Model-3A10
Fig. 1-11.
Model-3A10
1-18
Printer Mechanism
REV.-A
1.5.2
The ROC filter unit contains a power cord ( 120 V version) or AC inlet (220/240 V version), power switch,
ROC
Filter Unit
fuse, filter circuit, and power transformer.
..—
Fig. 1-12. ROC Filter Unit (120V version)
Fig. 1-13.
ROC Filter Unit (220
V/240V
versions)
1-19
REV.-A
1.5.3
The
ICS
on the
ROCX
ROCX
Board Unit
board contains the main control circuit, driver circuit, and voltage regulator circuit. The main
ROCX
boards are the pPD78 10HG CPU and the E05A03 gate array which controls everything.
\----=--/.
Y
1.5.4
LCPNL
The
buzzer.
Fig. 1-14. ROCX Board Unit
LCPNL
Board Unit
board unit is a control panel of LX-800 which contains the indicator
LEDs,
switches and
Fig. 1-15. LCPNL Board Unit
1-20
REV.-A
1.5.5 Housing
The housing is comprised of the upper and lower cases, and paper feed knob, which accommodate
the printer mechanism, ROCX board unit,
LCPNL
board unit, and ROC filter unit.
Fig. 1-16. Housing
1-21
CHAPTER 2
OPERATING PRINCIPLES
REV.-A
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.1
CABLE CON NECTIONS....... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2
POWER SUPPLY CIRCUIT
2.3
2.3.1 ROC Filter Unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.3.1.1 Fuse and Filter Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.3.1.2 Power Transformer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.3.2 Regulator Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.3.2.1 Operation Principles of Chopper
Type Switching
+24V
2.3.2.2
2.3.2.3
+5V
CONTROL
2.4
2.4.1 Functions of the CPU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.4.2 E05A03 Gate Array Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.4.3 Data Flow
CIRCUIT........
2.4.3.1 Initialization
2.4.3.2 Print Data Processing
Supply Circuit
Supply Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Regulator...............................................2.6
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.
2-1
.
2-3
2-3
.
. 2-3
.
2-4
.
2-4
.
2-5
2-7
.
2-8
.
2-9
.
2-11
.
2-14
2-18
2-19
2-20
2.4.4 Reset Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.4.5 Carriage Motor
2.4.5.1 Home Position Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.4.5.2 Carriage Motor Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.4.5.3 Home Position Seek. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.4.5.4 Carriage Motor Drive Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-27
2.4.6 Paper Feed Motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.4.6.1
2.4.6.3
2.4.6.3
2.4.6.4
2.4.7 Printhead
2.4.7.1
2.4.7.2
2.4.7.3
Paper End Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Paper Feed Motor Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Auto Loading Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Paper Feed Motor Drive Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-31
Printhead Control
Printhead Drive Pulse Width Control Circuit . . . . . . . . . 2-33
Printhead Drive Circuit
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.
2-22
2-23
.
2-23
.
2-24
.
2-26
.
2-27
.
2-29
2-29
.
2-30
2-32
2-32
2-34
Z.i
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