Epson Stylus Color 800 User manual

EPSON TERM NAL PRINTER
S~hs. 800+
SERVICE MANUAL
EPSON

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 subjects to change without notice.
All efforts have been made toensure theaccuracyof thecontentsof 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 the consequence thereof.
Epson and Epson ESC/P are registered trademark of Seiko Epson Corporation.
General Notice: Other product names used herein are for identication purposes only and maybe
trademarks of their respective campanies.
@Copyright 1994 by SEIKO EPSON CORPORATION Nagano, Japan
-i-

PRECAUTIONS
Precautionary notations throughout the text are categorized relative to 1) personal injury and 2)
damage to equipment.
DANGER 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.
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.
1.
2.
3.
1.
2.
3.
4.
5.
ALWAYS DISCONNECT THE PRODUCT FROM BOTH THE POWER SOURCE AND
PERIPHERAL DEVICES PERFORMING ANY MAINTENANCE OR REPAIR PROCE-
DURE.
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.
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.
REPAIRS ON EPSON PRODUCT SHOULD BE PERFORMED ONLY BY AN EPSON
CERTIFIED REPAIR TECHNICIAN.
MAKE CERTAIN THAT THE SOURCE VOLTAGE IS THE SAME AS THE RATED VOLT-
AGE, 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
THE POWER SOURCE BEFORE REMOVING OR REPLACING PRINTED CIRCUIT
BOARDS AND/OR INDIVIDUAL CHIPS.
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
BY THE MANUFACTURE; INTRODUCTION OF SECOND-SOURCE ICS OR OTHER
NONAPPROVED COMPONENTS MAY DAMAGE THE PRODUCT AND VOID ANY
APPLICABLE EPSON WARRANTY.
- ii -

PREFACE
This manual describes functions, theory of electrical and mechanical operations, maintenance, and repair
of Stylus 800+.
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. GENERAL 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. ADJUSTMENT
Includes a step-by-step guide for adjustment.
CHAPTER 5. TROUBLESHOOTING
Provides Epson-approved techniques for adjustment.
CHAPTER 6. MAINTENANCE
Describes preventive maintenance techniques and lists lubricants and adhesives required to service the equipment.
APPENDIX
“Describes connector pin assignments, circuit diagrams, circuit board component layout and exploded diagram.
The contents of this manual are subject to change without notice,
- iv -

REVISION SHEET
Revision
issue Dste
Revisbn Page
Rev. A April 20, 1994
Ist issue
c)
4. .
‘+,- -’
“v-

TABLE OF CONTENTS
CHAPTER 1. GENERAL DESCRIPTION
CHAPTER 2. OPERATING PRINCIPLES
CHAPTER 3. DISASSEMBLY AND ASSEMBLY
CHAPTER 4. ADJUSTMENT
CHAPTER 5. TROUBLESHOOTING
CHAPTER 6. MAINTENANCE
APPENDIX
- vi -

Chapter 1 General Description
Table of Contents
1.1 FEATURES
1-1
1.2 SPECIFICATIONS
1-3
1.2.1 Printing Specifications. . . . . . . . . . . . . . . . . . . .’. . . . . . . . . . . . “ s ----- 1-3
1.2.2 Paper Handling Specification. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
1.2.3 Paper Specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . “ . 1-6
1.2.4 Ink Cartridge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . “ .. ....0.. s “ 0.. 1-8
1.2.5 Environmental Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ““.... 1-9
1.2.6 Electrical Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .“.””.. 1-9
1.2.7 Reliability. . . . . . . . . . . . . . . . . . . . . . . . . . . . “ . . . s Q “ “ .0. . s .- “ - “ “ “ 1-10
1.2.8 SafetyApprovals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .O-”.””-”.= 1-10
1.2.9 Physical Specifications . . . . . . . . . . . . . . . .. .. .. .. ... ... .”. -”s”- 1-10
1.3 INTERFACE SPECIFICATIONS
1-11
1.4 PRINTER OPERATIONS
1-13
1.4.1 Control Panel.... . . . . . . . . . . . . . . . .. ... ... ..”.-OS --.oo.mS”m” 1-13
1.4.2 Panel Operation atPowerOn . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14
1.4.3 Default Setting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -” .. 0.-. “ 1-14
1.4.4 Initial InkCharge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15
1.4.5 ErrorConditions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..”...-”” 1-15
1.5 MAIN COMPONENTS
1-16
1.5.1 Main Control Board (C134 MAIN Board). . . . . . . . . . . . . . . . . . . . . . . . 1-16
1.5.2 Power Supply Unit (C106 PSB-B/PSE-B Board). . . . . . . . . . . . . . . . . . 1-17’
1.5.3 Printer Mechanism (M-4811). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-17
List of Figures
Figure 1-1. View of the Stylus 800+. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Figure l-2. Nozzle Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Figure 1-3. Printable Area - Cut Sheet (Built-in Sheet Feeder). . . . . . . . . . . . . 1-7
Figure 1-4. Printable Area - Cut Sheet /Envelope (Manual Insertion Slot) . . . . 1-7
Figure 1-5. Adjust Lever . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . “ .-. . “ . . 1-8
Figure 1-6. Temperature / Humidity Range. . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9
Figure 1-7. Data Transmission Timing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 I
Figure 1-8. Control Panel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-13
Figure 1-9. C134 MAIN Board Component Layout . . . . . . . . . . . . . . . . . . . . . 1-16
Figure 1-10. C106 PSB-B/PSE-B Board Component Layout . . . . . . . . . . . . . 1-17
Figure 1-11. Printer Mechanism (M-4811). . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-17
Rev. A
l-i

Table 1-1. Consumable forthe Stylus 800+. . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Table l-2. Feature Comparison . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Table l-3. Print SpeedandPrintable Columns . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Table 1-4. Character Tables. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Table 1-5. Adjust Lever Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
Table l-6. Requirements for Operation andStorage . . . . . . . . . . . . . . . . . . . . . 1-9
Table l-7. Electrical Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9
Table l-8. Signal andConnector PinAssignments . . . . . . . . . . . . . . . . . . . . . 1-11
Table l-9. Default Setting Item. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14
Table 1-10. Error Codes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15
@
-.
.:
;:. ,
@
‘ l-ii
Rev. A

Stylus tUW+ service Manual
General Description
1.1 FEATURES
The Stylus 800+ is a serial inkjet printer that uses a newly developed inkjet technology to produce
superb quality output with high-speed printing. The major features of this printer are:
~ High print quality from a MACH (Multi-Layer ACtuator Head) inkjet technology.
D Fast printing of LQcharacters at 165 cps and draft characters at 250 cps.
D Compact design saves precious work space.
D Built-in auto sheet feeder with a capacity for a
maximum of 100 cut sheets (either A4 or letter).
D Equipped with4 scalable fonts, 5 bitmap LQ fonts, and 1 draft font, standard.
Cl 9 character tables for the standard version
15 character tables for the NLSP (National Langauage Support) version.
The figure below shows a view of the printer.
Printer cover
parallel
Paper separator Paper feeder cover
int
let
Figure 1-1. View of the Stylus 800+
Table 1-1. Consumable for the Stylus 800+
control panel
I
Part No.
I
Description
I
Type
I
S020025
Ink cartridge I Black ink cartridge
I
Rev.A
1-1

Gomrd oescf@knl
wh18ao&
Su’v&ohhud
Table 1-2 shows the differences
in features for the Stylus 800 and Stylus W+.
Table 1-2. Feature Comparison
Function/SpecWation stylus
Soo
stylus SO&
LQ Fonts (10 cpi)
Printing Spaed
150CPS
165 Cps
Draft Fonts (10 cpi)
Printing Speed
cannot printing
250 Cpe
Roman ‘
Draft
sane serif
Roman
Resident Bitrnsp Fonts
Courier
Ssns Serif
Prest”*
Courier
script Prestige
script
Roman T
Rasident Scalable Fonts ~=
Roman T
Saris serif
Saris Serif H sane
Serif H
n
..,,’,
<,,.
c’
..1
1-2
Rev. A

Stylus 800+ service Manual
GenwW Description
1.2 SPECIFICATIONS
This section provides detailed statistics for this printer.
1.2.1 Printing Specifications
Print system: Ondernand inkjet system
Nozzle configuration: 48 nozzles (12 nozzles
x 4 staggered columns)
17/360
II
60/360
1,
12/3
,,
I
,
A
#1 ~
I
‘d
‘O=a
#2y
,+
i ~$
60 0
I #3 i’Paper feed
‘o
%
i #4 i
direction
i i
i’
i i’
i i i i
ii
i
ii
I
ii
hi 9
#45 ‘
#’$6Y#47~
i
i,48d) I
Figure 1-2. Nozzle Configuration
Print direction: Bidirectional printing with logical seeking control
Print speed and printable columns:
See table below.
Tabie 1-3. Print Speed and Printabie Coiumns
Character Pitch Printable Columns Print Speed (LQ) Print Speed (Draft)
10 cpi
80
165 CPS
250 Cps
12 cpi
96 198 C@
300 Cps
15 cpi
120
246 @s
375 Cps
17 cpi
(10 cpi/ condensed)
137 283 Cpe 429 Cps
20 cpi
(12 cpi/ condensed)
160 330cps 500 Cps
Rev. A
14

Character sets: Legal and
14 international character sets.
Character tables:
See the table below.
Fonts:
Table 1-4. Character Tables
Chamcter Table
standard
NLSP
Veraion Vewaion
Italic
I
o0
1
PC437 {lJ.S./Standard Eumtw)
1010
PC850 (Multilingual)
o0
1
I
PC880 (Portuguese)
o
I
x
PC883 (Canadian-French)
o
x
PC885 (Nordic) o
x
PC881 (Iceland)
ox
PC437 Greek
Ixlo
PC851 (Greek) xo
PC852 (East Eurme)
x
o
PC853 (Turkish)
Ixlo
PC855 (Cyrillic) xo
PC857 (Turkish) x
o
PC888 (Russian)
xo
PC889 (Greek) xo
Abicornp
Iolx
BRASCII
o
x
MAZOWIA (Poland) xo
I
Code MJK (Czecho/Sbvakia)
xo
ISO 8859-7 (Greek) x
o
ISO Latin IT (Turkish)
Ixlo
Bulgaria (Bulgaria) xo
I
o supported
x Not supported
Bitmap fonts —
- ii50N Draft
- EPSON Roman
- EPSON %llS %if
- EPSON Courier
- EPSON Prestige
- EPSON Script
Scdiablefmts —
- EPSON Roman
- EPSON %s Serif
- EPSON Roman T
- EPSON Saris
SerifH
(lOcpi/12 cpi/15cpi)
(10/12/15/proportional)
(10/12/15/proportional)
(10/12/15)
(10/12/15)
(10/12/15)
8-32 points (units= 2 points)
8-32 points (units= 2 points)
8-32
points (units= 2 points)
8-32 points (units= 2 points)
*
14
Rev. A

Stylus S00+ Servke A4snusl
General Description
Print mode:
For bitrnapfonts —
Selection and mixture of the following modes are allowed.
- Print quality (LQ)
- Character pitch (10/12/15 cpi or proportional)
- Condensed (not available with 15 cpi character pitch)
- Double width - Double height
- Emphasized - Double strike
- Italic
- Underline
- Double underline
- OverScore
- Strike through
- Shadow / outline
For scalable fonts —
- Emphasized - Double strike
- Italic
- Underline
- Double underline
- OverScore
- Strike through
- Shadow / outline
Control codes:
Esc/P2
Input buffer
32KB or 8KB (selected using the default setting labeled “Mixed text/
graphics mode”)
1.2.2 Paper Handling Specification
Feeding system: Friction feed from the built-in sheet feeder or manual insertion slot.
Note: The following operations are nota//owed.
1. Reverse feeding w“thin 3mm (O. 12inches) ftvm the top edge
or 16 mm (0.63 inches) from the Mtom edge of the paper.
2. Reverse feeding beyond 7.9mm (0.3inches).
Feeding pitch:
1,6 or l&in& feed or Prow
ammable in 1A60-inch minimum increments.
Paper path: Built-in sheet feeder (front entry)
Manual insertion slot (top-rear entry)
Feeding speed:
87 rns (at 1/6-inch feed pitch)
Rev. A
1-5

General Deecriptbn
Slykls m
~Mmud
1.2.3 Paper Specifications
Usable paper:
cut sheet
With the built-in skt feeder —
size:
For European/Paafic version:
A4(WXL :210 mm(83”)x 297mm(11.T’))
For U.S. version:
Letter (W x L: 216 mm (85”) x279 mm (11.0”))
‘IhiClmess:
0.065- o.14mrn(o.oo26 - 0.0055”)
weight 64- 90g/m2 (18 -
241b. / 55- 78 kg)
Quality:
Bond paper, Ph&Ompier paper
With manual insertion —
Width:
182-216 mm (7.2 - 8.5”)
Length:
257- 297mm(lo.1 - 11.7”)
Thickness: O.(M5-
0.11 rnm(O.0026- 0.0043”)
weight 52-
90g/m2 (14 - 241b / 45- 78kg)
Quality: Bond paper, Photocopier paper
Size:
#6 (w X L : 166 mm (6%”) X %? mm (354”))
#lI)(wx L :240 mm(9k”) X 104mm(41Z$”))
Thickness:
0.16-052 mm(O.0063 - 0.020”)
Envelope
Note: Variatbnsrnpaperthkkness W”thi. theprintaMearea mustbe
0.25mm (0.CMW~ orless.
weight:
45- 90g/m2 (12- 241b.)
Quality: Bond paper, Air mail
Notes 1. Envekpesare usable only Mthmanualinsertion feed.
2.
Ptintingon envelcpeskguamnte edonlyatmxmal temperature
and humidity.
3. lnsertenve@esinto themanualinsertion slotsidewaya.
14
Rev. A

Stylus &MO+ Service Manual General Description
Printable area: Cut sheet (with built-in sheet feeder)
B
(Left margin) ,
—
c
t--
(Right margin) ,
Printable area
—
-4
A
(Top margin)
-1
D
(Bottom margin)
-+
Figure 1-3. Printable Area — Cut Sheet
(Built-in Sheet Feeder)
Cut Sheet / envelopes (with the manual insertion slot)
B
(Left margin)
D
c
~Right margin)
s
Printable area
—
t-
J
A
(Top margin)
D
(Bottom margin)
Figure 1-4. Printable Area — Cut Sheet/ EnveIoW
(Manual Insertion Slot)
Notes: A: The minimum top margin= 3 mm (O. 12”)
B: The minimum Ieflmargin = 3 mm (0.12”)
C: The minimum right margin is
A4 size= 3.0 mm (O. 12”)
Letter size = 9.0 mm (0.38~
Manual insertion =3 mm (O. 127 (Paper widths A4 (210 mm))
Manual insertion = ‘Paper
w“dth” 207 mm (8.3”) (Paper width 2 A4 (210 mm))
D: The minimum bottom
matgin = 13 mm (0.51”)
Rev. A
1-7

-nerd Description
stylus 8m+
~ Mstnd
Adjust lever settings:
The adjust lever, attadwd to the carriage unit must be set to proper
position for the paper thickness, as shown below.
Table 1-5. Adjust Lever Settings
Lever Position Paper Type Papsr
Thkknsss
Left
Cut Sheets
0.065-0.11 nun
(0.0026- 0.0056”)
Right
Envelopes
0.16- 0.52 mm
(0.0063- 0.020”)
4
Plain paper, bond paper
\
Envelopes
/
\
(Ox
: :
.
,
, ,
, ,
,,
,,
In
. . . . . . ------ 0
Figure 1-5. Adjust Imer
1.2.4 Ink Cartridge
Type:
Exclusive cartridge (SOXXX25)
Ink color: Black
Print capacity:
0.7 million characters (LQ)
Ink capacity:
29.0 +o.5/-l.occ
Life:
The effective life from the rndicated production date is:
2years (total time inpackageandafterunpacking)
6 months(afterunpacking)
Temperature conditions: Storage —
-30- m c (-22 - 104° F)
(Up to 1 month at W C (14W P))
Transport —
-30- WC (-22 - 140” F)
(Up to 1 month at 40° C (104° P) or 120 hours at 6(T’ C
(140’ P’))
Note: Ink freezes in the rnk cartridge if kept below-C (26.6° 9.
If requires sewal hours to unfreeze at mom temperature
(2P C(77 9).
Width 28.5mm(l.12”)
Depth 54.5 mm (215”)
Height 38.5 mm(l.52”)
Dimensions:
c
‘:”. \

Stylus 800+ service Manual Ganwd
Description
1.2.5 Environmental Conditions
Table 1-6. Requirements for Operation and Storage
Description Operating
Storage
Temperature 10- 35° C (50 - 95° F)*l-20- 50° c (-4 - 122° F) ● 2
Humidity
20- 80% RH “1’”35- 85% RH ‘2”3
Resistance to shock 1 G, within 1 ms
2 G, within 2 ms ● 2
Resistance to vibration
0.15 G, 10-55 Hz 0.50 G, 10-55 Hz ● 2
Note: *7 = Operating conditions must be h this range shown h the figure Mow.
*2= When the pnnteris in the shipping container.
*3= Without condensation.
Humidity
(%RH)
Print assured range
80%
ss~o
*o’Y.
10” c
27” C
35” c “c
(5o” F) (80” F) (95” F) (“F)
Figure 1-6. Temperature/ Humidity Range
1.2.6 Electrical Specifications
Table 1-7. Electrical Specifications
Item 120 V Version
220-240 V Version
Rated voltage
120 VAC 220-240 VAC
Input voltage range
103.5- 132 V 198-264 V
Rated frequency range
50-60 Hz 50-60 Hz
Input frequency range 49.5 -60.5 Hz 49.5 -60.5 Hz
Rated current
0.5 A 0.3 A
Approx. 13 W
Approx. 13 W
Power consumption
(self-test with 10 cpi LQ (self-test with 10 cpi LQ
characters)
characters)
10 MQ, minimum 10 MQ, minimum
Insulation resistance (applying 500 VDC between AC (applying 500
VDC between AC
line and chassis)
line and chassis)
1000 VAC rms -1 minute or
Dielectric strength
1200 VAC rms -1 second 1500
VAC rms -1 minute
(between AC line and chassis)
(beween ‘c ‘ine and Chasis)
Rev.
A
14

Gsnsrd Dssaiption stylus 8@+
ssfwicsmm4d
1.2.7 Reliability
MTBF:
4000 power on hours (POH) at a duty cycle of 10’Yo
Printhead life:
1 billion dots per nozzle
Total print volume: 75000 pages (with A4 or letter-size paper)
1.2.8 Safety Approvais
Safety standards:
US. version:
UL1950 with D3
CSA22.2 m
European version:
EN 60950 m
IEC 950 (SEMKO, DEMKO, NEMKO, SETI)
Radio frequency interference (lWI):
US. version: FCC
part 15, subpart B, ChSS B
European version:
Vfg. 243 (VDE 0878 part 3, part 30)
EN 55022 (CISPR Pub.22) ClaSS B
1.2.9 Physicai Specifications
Size(Wx DX H): 435 X 264 X 154 mm (17.1 x 10.4x 6.1 inches)
Weight Approximately 4.8
ka excluding the ink cartridge
c)
-iii.”
1-1o
Rev. A

Stylus 800+ service Manual General
Dasoription
1.3 INTERFACE SPECIFICATIONS
The Stylus 800+ is equipped with an 8-bit parallel interface, standard.
Data format:
8 bit parallel
Synchronization: STROBE pulse synchronization
Handshaking:
By BUSY and ACKNLG signals
Signal level: TI’L-compatible
level
Adaptable connector: 36-pin 57-30364) (Amphenol) or equivalent
Data transmission timing: See Figure 1-7.
h
i
ACKNLG
[
DATA
)
Figure 1-7. Data Transmission Timing
Table 1-8 shows the comector pin assignments and signal functions of the 8-bit parallel interface.
Table 1-8. Signal and Connector Pin Assignments
Pin No. Signal Name I/o
Description
The STROBE pulse is used to read data from the host computer.
1
STROBE
1
The pulse width must be 0.5p.sor more. Normally, it is HIGH,
and data is latched with rising edge of this signal.
DATA 1-8 are parallel data bits. When one of these signals is
HIGH, the data bit is 1; when LOW, the data bit is O. The most
2-9
DATA 1-8
I
significant bit (MSB) is DATA 8. The signal state must be
maintained for 0.5
p.s on either side of STROBE signal’s active
edge.
ACKNLG is the acknowledge pulse, with a width of
10
ACKNLG
o
approximately 10 p.s. This signal goes LOW on completion of
data reception to indicate the printer is ready to receive further
data.
The BUSY signal informs the host computer of the
printet’s
11
BUSY
o
status. When this signal is HIGH, the printer cannot accept
futiher data.
12
PE
o
This signal indicates whether paper is available in the printer or
not. A HIGH level indicates no paper.
13 SLCT
o
Pulled up to +5 V through a 1.OK S2 resistor in the printer.
If this signal is set to LOW, the printer automatically performs
14
AFXT
I
one line feed upon receipt of a CR (carriage return) code. The
status of this signal is checked only at power on and initialization
15
NC
—Not
USed.
Rev. A1-11

Garleml Descdption
Styhm m Sutdc9 Msmd
Tabie 1-8. Signai and Connector Pin Assignments (Continued)
II
I
Pin No.
Signai Narno
W
Description
16
I GND
— I Signai ground.
17 CHASSIS-GND
—
Chassis ground. (i30th chassis andsignai ground are
connected in the printer.)
18
Nc
— Not used.
19-30
GND
— Twisted-pair return signai ground.
31
m i
if this signai go& LOW, the printer is initialized. The pulse
width of this signai must be 50 @ or more.
32 ERROR This
signat goes LOW if the printec
o● has a
fatai wmr.
. runs out of paper.
33
I GND —
I Signai ground.
1 1
34 I NC
!
— I Not used.
35 +5 v
— Puited up to +5V through 1.OKQ resistor in the printer.
,
36 l—
— I Not used (reserved).
Note: Z5e &ection of tie signal h as viewed tkom the printer.
c
‘,
;’
@
%,
.
1-12
Rav. A