Oki OKIPOS 80 Plus III User manual

Rev A Copyright Oki Europe Limited 1999
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MAINTENANCE
MANUAL

WARNING: To prevent fire or shock hazard, do not expose this
printer to rain or moisture.

Disclaimer
Information in this publication is subject to change without notice. However, as product
improvements become available, Oki Europe will make every effort to provide updated
information for the products described in this publication.
Oki Europe cannot guarantee that changes in software and equipment made by other
manufacturers, and referred to in this publication, do not affect the applicability of the
information in this publication.
Copyright
© 1999 Oki Europe Limited. All rights reserved.
Revision A, April 1999
No part of this publication may be reproduced, stored in a retrieval system, or transmitted, in any
form or by any means, mechanical, photocopying, recording, or otherwise, without the prior
written permission of Oki Europe Limited.
Trademarks
OKI is a registered trademark of Oki Electric Limited. Epson and ESC/POS are registered
trademarks of Seiko Epson Corporation. Axiohm is a registered trademark of Dardell
Technologies. IBM is a registered trademark of the International Business Machines Corporation.

Federal Communications Commission Radio Frequency Interference
Statement
The OKIPOS 80 Plus III Printer complies with the limits for a Class A computing device in
accordance with the specifications in Part 15 of FCC rules which are designed to minimise radio
frequency interference during installation; however, there is no guarantee that radio or television
interference will not occur in any particular installation. If this equipment does cause interference
to radio or television reception, which can be determined by turning the equipment off and on
while the radio or television is on, the user is encouraged to try to correct the interference by one
or more of the following measures:
i Reorient the radio or television receiving antenna;
i Relocate the printer with respect to the receiver; and/or
i Plug the printer and receiver into different circuits.
If necessary, the user should consult their dealer or an experienced radio/television technician for
additional suggestions. The user may find the following booklet prepared by the Federal
Communications Commission helpful: How to Identify and Resolve Radio/TV Interference
Problems.
This booklet is available from the US Government Printing Office, Washington, DC 20402. Ask
for stock number 004-000-00345-4.
UL, CSA, VDE, CE Statement
Oki Europe POS printers are UL and CSA Listed, VDE Certified, and carry the CE Mark.

Table of Contents
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What is in this book?................................................................................................................1
Who should read this book? .......................................................................................1
What does it cover?.....................................................................................................1
Where can you find more information?......................................................................1
Contacting OKI...........................................................................................................1
Warranty Information...............................................................................................................2
Options........................................................................................................................2
Service Information ....................................................................................................2
Ordering Supplies ....................................................................................................................3
Paper............................................................................................................................3
Cables..........................................................................................................................3
Description of the OKIPOS 80 Plus III Printer.......................................................................4
OKIPOS 80 Plus III Thermal Receipt Printer............................................................4
Standard Features........................................................................................................5
Optional Features........................................................................................................5
Technical Specifications..........................................................................................................6
Printing Specifications................................................................................................6
Print Characteristics....................................................................................................6
Reliability....................................................................................................................8
Dimensions .................................................................................................................8
Weight.........................................................................................................................8
Power Requirements...................................................................................................8
Environmental Conditions..........................................................................................8
Communication Interfaces and Cash Drawer Connectors.....................................................9
Serial Cable.................................................................................................................9
Parallel Cable............................................................................................................11
Cash Drawer Pin Assignments.................................................................................12
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Cleaning the Printer ...............................................................................................................13
Cleaning the Thermal Print Head ..........................................................................................13
Making Adjustments..............................................................................................................13

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Operating the Keypad ............................................................................................................15
Status LED................................................................................................................16
Buttons ......................................................................................................................16
Testing the Printer..................................................................................................................17
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Precautions for Disassembly..................................................................................................21
Necessary Tools........................................................................................................21
Disconnecting the Power Cord..............................................................................................22
Disconnecting the Communication Cable................................................................24
Disconnecting the Cash Drawer Cables...................................................................25
Removing the Cover Assembly.............................................................................................26
Removing the Outer Housing ................................................................................................27
Disassemble the Platen ..........................................................................................................29
Disassemble the Cover...........................................................................................................30
Replacing the Print Head.......................................................................................................32
Replacing the Cutter ..............................................................................................................35
Removing the Controller Board Assembly............................................................................36
Replacing the Stepper Motors................................................................................................38
Replacing the Sensors and Keyboard Assembly...................................................................39
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Unpacking the Printer............................................................................................................44
Printer Assembly....................................................................................................................46
Cover and Platen....................................................................................................................48
Print Head...............................................................................................................................49
Cutter......................................................................................................................................50
Controller Board.....................................................................................................................51
Motors and Switches..............................................................................................................53
Switch Wiring Detail..............................................................................................................55
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Product Information
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This book is intended for trained, service technicians.
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This book only covers the OKIPOS 80 Plus III Printer, not the entire point-of-sale
system, but it will tell you all you need to know about properly maintaining and servicing
the printer. You will learn how to clean, test, and disassemble the printer.
This book also provides some general and technical information about the printer, so you
will know what the features are, how reliable it is, and what its printing capabilities are.
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A Programmer’s Guide is available if you need to know how to program a point-of-sale
terminal or a personal computer to work with the printer. It describes all the commands
the printer recognises to perform its functions.
An Operator’s Guide is also available and is written for new and experienced operators.
It covers setting up and using the OKIPOS 80 Plus III Printer with any point-of-sale
system.
For information about ordering these books, refer to the next section.
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Contact your dealer first for general information about the OKIPOS 80 Plus III Printer
and how it works with your system. If you need more specific information about the
printer, you may contact Oki directly.
The Sales and Technical Support Departments will be able to help you with most of your
questions. Contact the Technical Support Department to receive technical support, order
documentation, receive additional information about the OKIPOS 80 Plus III Printer,
learn more about your warranty, or if you need to send a printer in for service. To order
supplies, or to receive information about other products by Oki, contact the Sales
Department.
You can reach both the Sales and Technical Support Departments of your local office by
accessing the Oki Europe Web site for the most up-to-date contact details.

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The OKIPOS 80 Plus III printer does not have any fittable options. The printer is
available in either Serial or Parallel form in light or dark grey cabinets. The printer can be
ordered with or without power supply.
Please contact you dealer or local country Oki Office to enquire about customisation of
the standard product.
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If you need a printer serviced, whether it is under warranty or not, call your dealer. You
may have several options for service depending on your contract. Your dealer may
service the printer directly or have a service agreement with a local service contractor.
If your dealer instructs you to send the printer to Oki for service or if you bought the
printer directly from Oki, contact your local country technical support department, and
ask for a return authorisation. Please have the printer’s model and serial numbers
available. The numbers are on a decal located on the bottom of the printer.
You will need to repack the printer and ship it directly to your Oki dealer or distributer.
Be sure to keep the original packing materials and box. Please refer to “Unpacking the
Printer” in the Operator’s Guide.

Product Information
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You may order supplies by calling your Oki dealer
You may order paper and/or cables.
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Paper Type Dimensions
Receipt paper Thermal 80 mm (3.15 inches) wide
100 mm (4.00 inches) diameter
128 mm (420 feet) length
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Cables
110V Power cable
240V Power cable
230V Power cable
Parallel Communication Cable
25-pin male to 25-pin male
Serial communication cable
PC, 9-pin female to 9-pin female
PC, 9-pin female to 25-pin female

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The OKIPOS 80 Plus III Printer is a stand-alone, 40-column, thermal printer. The OKIPOS
80 Plus III Printer performs high-speed receipt printing in a point-of-sale environment.
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The OKIPOS 80 Plus III is a thermal receipt printer used for applications requiring high-
speed extensive graphics printing.
i 31.8 lines per second of text at 6 lines per inch
i 42.5 lines per second of text at 8 lines per inch
i 5.3 inches per second of graphics
i 48 watt power supply

Product Information
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The following features and items are standard on the OKIPOS 80 Plus III Printer:
i 44-column printing at 15.6 characters per inch
i 4.0 inch diameter thermal paper roll 128 m (420 feet) per roll
i Automatic cutter (partial cut)
i Easy paper load
i High resolution graphics capability (8 dots per mm)
i RS-232C serial interface with 8K buffer
i Configurable receive and image buffer areas
i Paper out sensor
i Operator controlled self-test
i Dual cash drawer connectors (RJ11) and drivers (24V, 1.2 amp pulse for
approximately 150 ms; drawer open/closed status reporting)
i Characters and graphics
Print speed - 135 mm (5.3 inches) per second - text
Paper slew speed - 135 mm (5.3 inches) per second
Wide print zone - 72 mm (2.83 inches)
8 dots per mm (203 dpi) horizontal and vertical
i Reverse video and rotated on the same line
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The optional features either replace a standard feature or enhance the operation of the
printer. All optional features are installed at the factory and must be selected when the
printer is ordered.
i IEEE 1284 bidirectional parallel
i Custom colors and logo
i Internal buzzer (for kitchen applications)

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i Printing method: Direct thermal
i Print zone:72 mm (2.83 in.) wide
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The OKIPOS 80 Plus III Printer prints characters in a variety of pitches as shown in the
following table and print samples. All pitches are scaleable up to 64 times as large as the
standard size.
For information about programming the printer to print a particular pitch or style, please
refer to the Programmer’s Guide. You may obtain the guide free of charge in electronic
format from your Oki Dealer.
Pitch (characters per inch) Maximum Characters per Line
15.6 44
20.3 57

Product Information
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i Mean time between failure: 94,000 hours at 12.5% ratio
i Mean cycles between failure: 16,000,000 print lines
i Mean time to repair: 15 minutes
i Cutter: 1,000,000 cut life
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i Width: 152 mm (6.0 in.)
i Length:216 mm (8.5 in.)
i Height: 142 mm (5.6 in.)
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i Approximate weight: 4 pounds
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The OKIPOS 80 Plus III is designed to be AC powered in domestic and international
markets. The printer is equipped with an external universal input power supply that is
designed to operate world-wide without modification.
Supply
Voltage
Rating (VAC)
Supply
Voltage
Range (VAC)
Frequency
(Hz) Rated Power
(watts)
Current Idle
(amps) Current Printing (amps)
100 - 240 90 - 264 47 - 63 48
(min.) 0.09 @ 120VAC 0.045 @ 240VAC 0.5 @ 120VAC 0.25 @ 240VAC
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The printer will run at its best when stored and operated in an environment that meets the
following temperature and humidity conditions:
i
Operating temperature: 0° to 40°C (32° to 104°F)
i
Storage temperature: -10° to +60°C (-14° to +140°F)
i
Operating relative humidity: 10% to 90% (non-condensing)
i
Storage relative humidity: 5% to 90%

Product Information
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Cable Requirements
The OKIPOS 80 Plus III Printer standard configuration requires an RS-232C
shielded cable, no more than 50 feet long. The cable must be UL and CSA approved.
RS-232C Communication
The RS-232C interface uses the following protocol and communication
characteristics:
i Up to 19.2K baud
i Up to 8K buffer
i Ready/Busy or XON/XOFF protocol
i Communications diagnostic mode
Pin Assignments for 9-pin Printer Connector
Pin Name Description
1 DCD Data carrier detect
2 RX Receive data
3 TX Transmit data
4 DTR Data terminal ready
5 GND Signal ground
6 DSR Data set ready
7 RTS Request to send
8 CTS Clear to send
9 SSD Secondary data

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Serial Cable Configurations
The following cable configurations are for different host requirements.
Serial PC to OKIPOS 80 Plus III (Null Modem)
This Cable should be used to connect OKIPOS 80 Plus III printers to PC’s or
PS/2’s with 9-pin serial ports.
DTR
DSR
DCD
TXD
RXD
GND
RTS
CTS
4
6
1
3
2
5
7
8
DTR
DSR
DCD
TXD
RXD
GND
RTS
CTS
4
6
1
3
2
5
7
8
Nine-pin
Female
PC
Nine-pin
Female
Printer
PN 10-2020
Serial AT to OKIPOS 80 Plus III (Null Modem)
This cable should be used to connect OKIPOS 80 Plus III printers to PC’s or
PS/2’s with 25-pin serial ports.
DTR
DSR
DCD
TXD
RXD
GND
RTS
CTS
20
6
8
2
3
7
4
5
DTR
DSR
DCD
TXD
RXD
GND
RTS
CTS
4
6
1
3
2
5
7
8
Twenty-five-pin
Female
PC
Nine-pin
Female
Printer
PN 10-2021

Product Information
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Cable Requirements
The OKIPOS 80 Plus III Printer parallel option requires a 25-pin male D-shell
connector at the printer.
Pin Assignments
Pin(s) Signal Description Direction
1 STROBE Clock data to printer Host to Printer
2-9 D0 - D7 Data Host to Printer
10 ACK\ Printer accepted data Printer to Host
11 BUSY Printer busy Printer to Host
12 PE Paper out/status Printer to Host
13 SLCT Printer selected Printer to Host
14 AUTOFD Autofeed paper Host to Printer
15 ERR\ Printer error Printer to Host
16 INIT\ Initialize the printer Host to Printer
17 SLIN Select printer Host to Printer
18-25 GND Ground

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Adapters are available for connecting cash drawers equipped with BNC style connectors
(the standard is a modular, telephone style connector). Cash drawer connections to
emulate Axiohm or Epson are standard. Adapters to emulate Ithaca must be ordered with
the printer.
Epson/Axiohm
Cash Drawer J7 3-4* Pin # J7 1-2* Pin # Epson/Axiohm
1 1 Frame Ground
2 2 Drawer Drive - (Ground)
3 3 Status Switch +
4 4 Drawer Drive + (24V Switched)
5 Ground
5 No Connect
1
6 6 Status Switch - (Ground)
1 1 Frame Ground
2 No Connect
2 Ground
3 3 Status Switch +
4 4 Drawer Drive + (24V Switched)
5 5 Drawer Drive - (Ground)
2
6 6 Status Switch - (Ground)
*This jumper is for compatibility with earlier Epson printers. Pins 3-4 are the default
configuration for these jumpers.
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Caution: Do not connect a telephone line to the cash drawer connector,
otherwise the printer and telephone line may be damaged.

Cleaning and Adjustments
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Cleaning the printer occasionally and keeping it well maintained will help it to last longer
and run better. Remove paper dust periodically by using a vacuum cleaner or air compressor.
Caution: Do not use rubbing alcohol or petroleum-based chemicals to clean the
printer as these will damage the plastic parts. Take special care not to
get any cleaner on the electronic components.
None of the internal parts of the printer require lubrication or routine
maintenance. Apply a common cleaner such as fantastik®or Formula
409®to a damp cloth and gently wipe the surface of the printer.
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Under normal conditions the thermal print head does not need cleaning. However, if the print
characters are not printing correctly, wipe the thermal print head with alcohol and a lint free
cloth.
Caution: Do not get any alcohol on any of the other parts of the printer
mechanism or cabinetry.
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The OKIPOS 80 Plus III Printer does not require any adjustments for normal operation.

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