ASEM SR 85 User manual

SERVICE MANUAL
POS PRINTER
SR 85
All specifications are subject to change without notice.

PREFACE
This service manual provides the technical information for many individual component systems, circuits and
gives an analysis of the operations performed by the circuits. If you need more technical information, please
contact Technical Support. Schematics and specifications provide the needed information for the accurate
troubleshooting.
All information in this manual is subject to change without prior notice. Therefore, you mu st check the
correspondence of your manual with your machine. No part of this manual may be copied or reproduced in any
form.
SR85 Service Manual
Version: A01
Code: 88060042
Date: 15.02.2016
SR 85 - Service Manual

ALERT MESSAGE & SYMBOL
This manual uses the following conventions to show the alert messages. An alert message consists of an alert
signal and alert statements. The alert signal consists of an alert symbol and a signal word or just a signal word.
The following are the alert signals and their meanings:
This indicates a hazardous situation likely to result in serious personal injury if the user does not perform the
procedure correctly.
This indicates a h azardous situation could result in personal injury if the user does not perform the p rocedure
correctly.
This indicates a h azardous situation could result in minor or moderate personal injury if th e user does not
perform the procedure correctly. This alert signal also indicates that damages to the product or other property,
may occur if the user does not perform the procedure correctly.
This indicates information that could help the user use the product more efficiently.
SR 85 - Service Manual

CONTENTS
CHAPTER 1 PRECAUTION STATEMENT .............................................................................................1-1
1.1 Safety Precaution................................................................................................................................1-2
1.2 Servicing Precaution ...........................................................................................................................1-3
1.3 Precaution for Electrostatic Sensitive Device .....................................................................................1-4
1.4 Operational Precaution .......................................................................................................................1-4
CHAPTER 2 PRODUCT SPECIFICATION .............................................................................................2-1
2.1 General Specification..........................................................................................................................2-2
2.2 Appearance.........................................................................................................................................2-3
2.2.1 Printer Dimension.........................................................................................................................2-3
2.2.2 AC Adapter Dimension.................................................................................................................2-4
2.2.3 Feature Location ..........................................................................................................................2-4
2.3 Thermal Printer Specification..............................................................................................................2-5
2.3.1 Printer Specification .....................................................................................................................2-4
2.3.2 Character Specification ................................................................................................................2-5
2.3.3 Paper Specification ......................................................................................................................2-6
2.3.4 Reliability and Environment Specification ....................................................................................2-6
2.3.5 Printable Area...............................................................................................................................2-7
2.3.6 TPH Specification.........................................................................................................................2-8
2.3.7 TPH Maximum Condition .............................................................................................................2-8
2.3.8 Other Component Specification ...................................................................................................2-8
2.4 SMPS Specification ............................................................................................................................2-9
2.4.1 SMPS Specification......................................................................................................................2-9
2.4.2 SMPS Output Connector..............................................................................................................2-9
2.5 Interface Specification.........................................................................................................................2-10
2.5.1 RS-232C Serial Interface .............................................................................................................2-10
2.5.1.1 RS-232C Specification...........................................................................................................2-10
2.5.1.2 RS-232C(DSUB25) Signal Description .................................................................................2-10
2.5.1.3 RS-232C(DSUB25) Interface Cable ......................................................................................2-11
2.5.1.4 RS-232C(DSUB9&RJ45 COMBO) Signal Description..........................................................2-12
2.5.1.5 RS-232C(DSUB9&RJ45 COMBO) Interface Cable ..............................................................2-12
2.5.2 IEEE-1284 Parallel Interface........................................................................................................2-14
2.5.2.1 Parallel Interface Cable Pin Connection................................................................................2-14
SR 85 - Service Manual

2.5.2.2 Parallel Signal Description.....................................................................................................2-14
2.5.3 USB Interface ...............................................................................................................................2-16
2.5.3.1 USB Specification ..................................................................................................................2-16
2.5.3.2 USB Signal Description .........................................................................................................2-16
2.5.3.3 USB Interface Cable ..............................................................................................................2-16
2.5.4 Ethernet Interface .......................................................................................................................2-17
2.5.4.1 Ethernet Specification ..........................................................................................................2-17
2.5.4.2 Ethernet Interface Cable ......................................................................................................2-17
2.5.5 Wireless LAN Interface ...............................................................................................................2-18
2.5.5.1 Wireless LAN Interface Specification ...................................................................................2-18
2.5.5.2 Wireless LAN Interface Block diagram ................................................................................2-18
2.6 Drawer Kick-Out Specification ............................................................................................................2-19
2.6.1 Drawer Signal Description............................................................................................................2-19
2.6.2 Drawer Interface Cable ................................................................................................................2-19
CHAPTER 3 INSTALL ATION AND OPERATION ..................................................................................3-1
3.1 Installation ...........................................................................................................................................3-2
3.1.1 AC Adapter, Interface and Drawer Cable Installation ..................................................................3-2
3.1.2 Paper Roll Installation ..................................................................................................................3-4
3.1.3 Partition Installation ......................................................................................................................3-5
3.1.4 Wall Mount Installation .................................................................................................................3-6
3.2 Operation ............................................................................................................................................3-7
3.2.1 Setting the DIP Switch..................................................................................................................3-7
3.2.1.1 DIP Switch Setting 1 Function ...............................................................................................3-7
3.2.1.2 Baud Rate Selection..............................................................................................................3-8
3.2.1.3 DIP Switch Setting 2 Function ...............................................................................................3-8
3.2.1.4 Printing Density Selection......................................................................................................3-8
3.2.2 Hexadecimal Dumping .................................................................................................................3-9
3.2.3 The Self Test Mode ......................................................................................................................3-10
3.2.4 Control Command ........................................................................................................................3-12
CHAPTER 4 DISASSE MBLY AND ASSEMBLY....................................................................................4-1
4.1 Case-Assy Block.................................................................................................................................4-2
4.2 Cover-LED, LCD Block .......................................................................................................................4-4
4.3 Cover-Open Block…………………………………………………………………………………………....4-5
4.4 Paper Supply Block…………………………………………………………………………………………..4-5
4.5 Main Board Case Block……………………………………………………………………………………...4-7
SR 85 - Service Manual

4.6 Roller Assy Block ………………………………………………………………………………………….…4-8
4.7 Printer Block........................................................................................................................................4-8
SR 85 - Service Manual

Chapter
Precaution Statement
1.1 Safety Precaution
1.2 Servicing Precaution
1.3 Precaution for Electrostatic Sensitive Device
1.4 Operational Precaution
Follow these safety, servicing and ESD precautions to prevent damage and to protect against potential hazards
such as electrical shock
SR 85 - Service Manual

1.1 Safety Precaution
1-1-1 Be sure that all built-in protective devices are replaced. Restore any missing protective shields.
1-1-2 When reinstalling the chassis and its assemblies, be sure to restore all protective devices, including nonmetallic control knobs and
compartment covers.
1-1-3 Make sure there are no cabinet openings through which people - particularly children - m ight insert fingers and contact dangerous
voltages. Such openings include excessively wide cabinet ventilation slots and improperly fitted covers and drawers.
1-1-4 Design Alteration Warning:
Never alter or add to the mechanical or electrical design of the Printer. Unauthorized alterations might create a safety hazard. Also,
any design changes or additions will void the manufacturer’s warranty.
1-1-5 Components, parts and wiring that appear to have overheated or that are othe rwise damaged should be replaced with pa rts that
meet the original specifications. Always determine the cause of damage or over heating, and correct any potential hazards.
1-1-6 Observe the original lead dress, especially near the following areas; sharp edges, and especially the AC and high voltage supplies.
Always inspect for pinched, out-of-place, or frayed wiring. Do not change the spacing between components and the printed circuit
board. Check the AC power cord for damage. Make sure that leads and components do not touch thermally hot parts.
1-1-7 Product Safety Notice:
Some electrical and mechanical parts have special safety-related characteristics which might not be obvious from visual inspection.
These safety features and the protection they give might be lost if the replacement component differs from the original - even if the
replacement is rated for higher voltage, wattage, etc.
Components that are critical for safety are indicated in the circuit diagram by shading, ( ) or ( ). Use replacement components
that have the same ratings, especially for flame resistance and dielectric strength specifications. A replacement part that does not
have the same safety characteristics as the original might create shock, fire or other hazards.
Danger of explosion if battery is incorrectly replaced. Replace only with the same or equiv alent type recommended by the manufacturer.
Dispose used batteries according to the manufacturer’s instructions.
SR 85 - Service Manual

1.2 Servicing Precaution
1-2-1 Servicing precautions are printed on the cabinet. Follow them
1-2-2 Always unplug the units AC power cord from the AC power source before attempting to:
(a) Remove or reinstall any component or assembly.
(b) Disconnect an electrical plug or connector.
(c) Connect a test component in parallel with an electrolytic capacitor.
1-2-3 Some components are raised abo ve the printed circuit board for safety. An insulation tube or tape is sometimes used. The internal
wiring is sometimes clamped to prevent contact with thermally hot components. Reinstall all such elements to their original position.
1-2-4 After servicing, a lways check that the screws, components and wiring have been correctly reinstalled. Make sure that the portion
around the serviced part has not been damaged.
1-2-5 Check the insulation between the blades of the AC plug and accessible conductive part.
(Example: metal panels and input terminals).
1-2-6 Insulation Checking Procedure:
Disconnect the power cord from the AC source and turn the power switch ON. Connect an insulation resistance meter (500V) to the
blades of AC plug.
The insulation resistances between each blade of the AC plug and accessible conductive parts (see above) should be greater than 1
Mega-ohm.
1-2-7 Never defeat any of the B+ voltage interlocks. Do not apply AC power to the unit (or any of its assemblies) unless all solid-state heat
sinks are correctly installed.
1-2-8 Always connect an instrument’s ground lead to the instrument chassis ground before connecting the positive lead; always remove
the instrument’s ground lead last.
An electrolytic capacitor installed with the wrong polarity might explode.
First read the- Safety Precautions-section of this manual. If some unforeseen c ircumstance creates a conflict between the servicing and
safety precautions, always follow the safety precautions.
SR 85 - Service Manual

1.3 Precaution for Electrostatic Sensitive Device
1-3-1 Some semiconductor (solid state) devices are easily damaged by static electricity. Such components are called Electrostatic
Sensitive Devices (ESDs); examples include integrated circuits and some field-effect transistors. The following techniques will reduce
the occurrence of component damage caused by static electricity.
1-3-2 Immediately before handling an y semiconductor components or assemblies, drain the electrost atic charge from your body by
touching a known earth ground. Alternatively, wear a discharging wrist-strap device. (Be sure to remove it prior to applying power -
this is an electric shock precaution)
1-3-3 After removing an ESD-equipped assembly, place it on a conducti ve surface su ch as alum inum foil to prevent accumulation of
electrostatic charge.
1-3-4 Do not use Freon-propelled chemicals. These can generate electrical charges that damage ESDs.
1-3-5 Use only a grounded-tip soldering iron when soldering or unsoldering ESDs.
1-3-6 Use only an anti-static solder removal device. Man y solder re moval devices are not rated as anti-static; these can accumulate
sufficient electrical charge to damage ESDs.
1-3-7 Do not remove a replacement ESD from its protective package until you are ready to install it. Most replacement ESDs are packaged
with leads that are electrically shorted together by conductive foam, aluminum foil or other conductive materials.
1-3-8 Immediately before removing the protective m aterial from the leads of a replacement ESD, touch the protective material to the
chassis or circuit assembly into which the device will be installed.
1-3-9 Minimize body motions when handling unpackaged replacement ESDs. Motions such as brushing clothes together or lifting a foot
from a carpeted floor can generate enough static electricity to damage an ESD.
1.4 Operational Precaution
1-4-1 The hitting element of the printer mechanism’s thermal head and the driver IC are easily damage. Never allow these components to
come into contact with metal or other hard objects.
1-4-2 Never touch the printer mechanism’s heating element with your hand. Doing so can dam age the heating element and affect proper
operation.
1-4-3 The head and motor areas are very hot during and immediately after printing. Do not touch components in these areas directly with
your hand.
1-4-4 Do not use an y paper other than these specified in this manual, otherwise print head reliability and print quality are affected
adversely.
1-4-5 Thermal paper starts to color at around 70℃. Take care to protect unused and printed thermal paper against the affects of heat, light
and humidity, which can cause the paper to color and characters on the paper to feed.
1-4-6 Take the roll paper out of the printer when you will not use the printer for a long time in a high temperature and humidity environment.
SR 85 - Service Manual