EM 220
Mobile Printer Service Manual
P1007752-014
Rev. 1.04
EM 220
Table of Contents
1. Proprietary Statements ..............................................................................................................................4
1-1 Safety Precautions..................................................................................................................................5
1-2 Servicing Precaution...............................................................................................................................6
1-3 Precaution for Electrostatically Sensitive Devices (ESDs) .....................................................................7
1-4 Operational Precautions .........................................................................................................................7
2. Installation and Usage ...............................................................................................................................9
2-1 Battery Installation ..................................................................................................................................9
2-2 Battery Charging .....................................................................................................................................9
2-2-1 Battery Charging Usage...................................................................................................................9
2-2-2 Battery Holder (Optional) Usage....................................................................................................10
2-2-3 EM Series Quad Charger (Optional) Usage ..................................................................................10
2-3 Paper Installation ..................................................................................................................................12
2-4 Belt Strap Usage...................................................................................................................................13
2-5 Leather Case (Optional) Usage ............................................................................................................14
2-6 Control Panel Usage.............................................................................................................................15
2-7 MSR Usage...........................................................................................................................................16
2-8 Self-Test................................................................................................................................................16
2-8-1 Self-Test Instructions .....................................................................................................................16
2-8-2 Self-Test Printout Sample ..............................................................................................................17
2-9 Hexadecimal dumping ..........................................................................................................................18
2-10 Label Printing Function .......................................................................................................................19
2-10-1 Label Function Setting .................................................................................................................19
2-10-2 Auto Calibration Function.............................................................................................................19
2-11 Peripherals Connection ......................................................................................................................20
2-11-1 Bluetooth Connection...................................................................................................................20
2-11-2 Interface Cable Connection .........................................................................................................20
3. Product Specifications.............................................................................................................................21
3-1 General Specifications..........................................................................................................................21
3-2 Printer Specifications ............................................................................................................................22
3-2-1 Product Configurator – EM series..................................................................................................22
3-2-2 Printer Appearance ........................................................................................................................23
3-2-3 Other Component Specifications ...................................................................................................25
3-3 Service Parts List ..................................................................................................................................26
3-4 Accessories Specifications ...................................................................................................................27
3-4-1 Accessories List .............................................................................................................................27
3-4-2 Accessories Appearance ...............................................................................................................28
3-4-3 P1002513 Battery charger .............................................................................................................30
3-4-4 P1002514 Battery cradle ...............................................................................................................30
3-4-5 P1002512 Battery pack..................................................................................................................30
3-4-6 P1002527 EM Series Quad charger..............................................................................................30
3-4-7 Interface cable for PC ....................................................................................................................31
4. Hardware ...................................................................................................................................................33
4-1 Wiring diagram......................................................................................................................................33
4-2 Block Diagram.......................................................................................................................................35
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5. Disassembly and Exploded view ............................................................................................................36
5-1 Disassembly..........................................................................................................................................36
5-1-1 Remove the Battery .......................................................................................................................36
5-1-2 Remove the ASSY-cover upper.....................................................................................................37
5-1-3 Assy-cover upper ...........................................................................................................................38
5-1-4 Remove the Assy-mechanism .......................................................................................................39
5-1-5 Assy-mechanism............................................................................................................................40
5-1-6 Remove the Assy-PCB-main .........................................................................................................41
5-1-7 Remove the Assy-MSR..................................................................................................................42
5-1-8 Assy-MSR ......................................................................................................................................43
5-1-9 Remove the Assy-cover lower .......................................................................................................44
5-1-10 Assy-cover paper .........................................................................................................................45
5-2 Exploded view.......................................................................................................................................46
5-2-1 EM 220 without MSR .....................................................................................................................46
5-2-2 EM 220M with MSR .......................................................................................................................47
6. Adjustments and Maintenance................................................................................................................48
6-1 Printer Cleaning ....................................................................................................................................48
7. Troubleshooting .......................................................................................................................................49
7-1 Inadequate LED response ....................................................................................................................49
7-2 Printing trouble......................................................................................................................................50
7-3 MSR operation ......................................................................................................................................51
7-4 Diagnostic (self-test / hexa-decimal dump) ..........................................................................................52
7-5 Communication Interface......................................................................................................................53
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1. Proprietary Statements
This manual contains proprietary information of Zebra Technologies Corporation. It is intended solely for the
information and use of parties operating and maintaining the equipment described herein. Such proprietary
information may not be used, reproduced, or disclosed to any other parties for any other purpose without the
expressed written permission of Zebra Technologies Corporation.
Product Improvements
Since continuous product improvement is a policy of Zebra Technologies Corporation, all specifications and
signs are subject to change without notice.
FCC Compliance Statement
NOTE: This equipment has been tested and found to comply with the limits or a Class B digital device,
pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against
harmful interference in a residential installation. This equipment generates, uses and can radiate radio
frequency energy and, if not installed and used in accordance with the instructions, may cause harmful
interference to radio communications. However, there is no guarantee that interference will not occur in a
particular installation. If this equipment does cause harmful interference to radio or television reception,
which can be determined by turning the equipment off and on, the user is encouraged to try to correct the
interference by one or more of the following measures:
• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet or circuit different from that to which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.
WARNING: Exposure to Radio Frequency radiation. To conform to FCC RF exposure requirements this
device shall be used in accordance with the operating conditions and instructions listed in this manual.
NOTE: This unit was tested with shielded cables on the peripheral devices. Shielded cables must be used
with the unit to insure compliance.
Changes or modifications to this unit not expressly approved by Zebra Technologies Corporation could void
the user’s authority to operate this equipment.
Canadian Compliance Statement
This Class B digital apparatus complies with Canadian ICES-003.
Cet appareil numérique de la classe B est conforme á la norme NMB-003 du Canada.
“IC:” before the equipment certification number signifies that the Industry Canada technical specifications
were met. It does not guarantee that the certified product will operate to the user’s satisfaction.
Liability Disclaimer
Inasmuch as every effort has been made to supply accurate information in this manual, Zebra Technologies
Corporation is not liable for any erroneous information or omissions. Zebra Technologies Corporation
reserves the right to correct any such errors and disclaims liability resulting therefrom.
No Liability for Consequential Damage
In no event shall Zebra Technologies Corporation or anyone else involved in the creation, production, or
delivery of the accompanying product (including hardware and software) be liable for any damages
whatsoever (including, without limitation, damages for loss of business profits, business interruption, loss of
business information, or other pecuniary loss) arising out of the use of or the results of use of or inability to
use such product, even if Zebra Technologies Corporation has been advised of the possibility of such
damages. Because some states do not allow the exclusion of liability for consequential or incidental
damages, the above limitation may not apply to you.
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1-1 Safety Precautions
1. Be sure that all of the built-in protective devices are replaced. Restore any missing protective shields.
2. When reinstalling the chassis and its assemblies, be sure to restore all protective devices including:
nonmetallic control knobs and compartment covers.
3. Make sure that there are no cabinet openings through which people – particularly children – might insert
fingers and contact dangerous voltages. Such openings include excessively wide cabinet ventilation slots
and improperly fitted covers and drawers.
4. Leakage Current Hot Check:
WARING: Do not use an isolation transformer during this test.
Use a leakage-current tester or a metering system that complies with American National Standards
Institute (ANSI C101.1, Leakage Current for Applications), and Underwriters Laboratories (UL Publications
UL1410, 59.7).
With the unit completely reassembled, plug the AC line cord directly into a 100VAC or 240VAC outlet of the
Adaptor.
With the unit’s AC switch first in the ON position and then OFF, measure the current between a known
Earth ground(metal water pipe, conduit, etc.) and all exposed metal part, including: metal cabinet, frame,
and screw-heads and printer. The current measure should not exceed 0.1 milliamp. Reverse the powerplug prong in the AC outlet and repeat the test.
5. Design Alteration Warning:
Never alter or add to the mechanical or electrical design of the ECR. Unauthorized alterations might create
a safety hazard. Also any design changes or additions will void the manufacture’s warranty.
6. Components, parts and wiring that appear to have overhead or that are otherwise damaged should be
replaced with parts that meet the original specifications. Always determine the cause of damaged or
overheating and correct any potential hazards.
7. 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.
8. 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.
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1-2 Servicing Precaution
WARNING 1: First read the Safety Precaution section of this manual. If some unforeseen
circumstance creates a conflict between the servicing and safety precautions, always
follow the safety precaution.
WARNING 2: An electrolytic capacitor installed with the wrong polarity might explode.
1. Always unplug the unit’s AC power cord from the AC power source or the Power Switch off 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.
2. Some components are raised above the printed circuit board for safety.
An insulation tube or tape is sometime used.
The internal wiring is sometimes clamped to prevent contact with thermally hot components.
Reinstall all such elements to their original position.
3. After servicing, always check that the screws, components and wiring have been correctly reinstalled.
Make sure that the portion around the serviced part has not been damaged.
4. Check the insulation between the blades of the AC plug and accessible conductive parts
(example: metal panels and input terminals).
5. 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 the AC plug.
The insulation resistance between each blade of the AC plug and accessible conductive parts (see above)
should be greater than 1 mega-ohm.
6. Never defeat any of the B+ voltage interlock. Do not apply AC power to the unit (or any of its assemblies)
unless all solid-state heat sinks are correctly installed.
7. 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.
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1-3 Precaution for Electrostatically Sensitive Devices (ESDs)
1. Some semiconductor (solid state) devices are easily damaged by static electricity. Such components are
called Electrostatically Sensitive Devices (ESDs); examples include integrated circuits and some fieldeffect transistors. The following techniques will reduce the occurrence of component damaged caused by
static electricity.
2. Immediately before handling any semiconductor components or assemblies, drain the electrostatic 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.)
3. After removing an ESD-equipped assembly, place it on a conductive surface such as aluminum foil to
prevent accumulation of electrostatic charge.
4. Do not use freon-propelled chemical. These can generate electrical charges that damage ESDs.
5. Use only a grounded-tip soldering iron when soldering or unsoldering ESDs.
6. Use only an anti-static solder removal device. Many solder removal devices are not rated as anti-static;
these can accumulate sufficient electrical charge to damage ESDs.
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.
8. Immediately before removing the protective material from the leads of a replacement ESD, touch the
protective material to the device will be installed.
9. Minimize body motions when handling unpacked replacement ESDs. Motions such as brushing clothes
together, or lifting a foot from a carpeted floor can generate enough static electricity to damaged an ESD.
1-4 Operational Precautions
1. The heating element of the printer mechanism’s thermal head and the driver IC are easily damaged.
Never allow these components to come into contact with metal or other hard objects.
2. Never touch the printer mechanism’s heating element with your hand. Doing so can damage the heating
element and affect proper operation.
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.
4. Do not use any paper other than these specified in this manual otherwise print head reliability and print
quality are affected adversely.
5. Thermal paper starts to color at around 70ºC. Take care to protect unused and printed thermal paper
against the affects of heat, light and characters on the paper to feed.
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.
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Copyrights
The copyrights in this manual and the label print engine described therein are owned by Zebra Technologies
Corporation. Unauthorized reproduction of this manual or the software in the label print engine may result in
imprisonment of up to one year and fines of up to $10,000 (17 U.S.C.506). Copyright violators may be
subject to civil liability.
This product may contain ZPL®, ZPL II®, and ZebraLinktm programs; Element Energy Equalizer® Circuit;
E3®; and AGFA fonts. Software © ZIH Corp. All rights reserved worldwide.
ZebraLink and all product names and numbers are trademarks, and Zebra, the Zebra logo, ZPL, ZPL II,
Element Energy Equalizer Circuit, and E3 Circuit are registered trademarks of ZIH Corp. All rights reserved
worldwide.
Monotype®, Intellifont® and UFST® are trademarks of Monotype Imaging, Inc. registered in the United
States Patent and Trademark Office and may be registered in certain jurisdictions.
AndyTM , CG PalacioTM, CG Century SchoolbookTM, CG TriumvirateTM, CG TimesTM, Monotype KaiTM,
Monotype MinchoTM and Monotype SungTM are trademarks of Monotype Imaging, Inc. and may be
registered in some jurisdictions.
HY Gothic HangulTM is a trademark of Hanyang Systems, Inc.
AngsanaTM is a trademark of Unity Progress Company (UPC) Limited.
Andale®, Arial®, Book Antiqua®, Corsiva®, Gill Sans®, Sorts® and Times New Roman® are trademarks of
The Monotype Corporation registered in the United States Patent and Trademark Office and may be
registered in certain jurisdictions.
Century Gothic™, Bookman Old StyleTM and Century SchoolbookTM are trademarks of The Monotype
Corporation and may be registered in certain jurisdictions.
HGPGothicB is a trademark of the Ricoh company, Ltd. and may be registered in some jurisdictions.
UniversTM is a trademark of Heidelberger Druckmaschinen AG, which may be registered in certain
jurisdictions, exclusively licensed through Linotype Library GmbH, a wholly owned subsidiary of Heidelberger
Druckmaschinen AG.
Futura® is a trademark of Bauer Types SA registered in the United States Patent and Trademark Office and
may be registered in some jurisdictions.
TrueType® is a trademark of Apple Computer, Inc. registered in the United States Patent and Trademark
Office and may be registered in certain jurisdictions.
All other product names are the property of their respective owners.
All other brand names, product names, or trademarks belong to their respective holders.
©2006 ZIH Corp.
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2. Installation and Usage
2-1 Battery Installation
1) Insert the battery on the rear side of the printer,
aligning the battery hook properly.
2) Push the battery into the slot until a snapping
sound is heard.
NOTE
As the battery is not charged at the time of purchase,
charge the battery prior to product use.
(Use the battery charger and/or the optional battery
holder.)
2-2 Battery Charging
2-2-1 Battery Charging Usage
1) Turn off the printer power.
2) Connect the power cord ② to the battery charger ①.
③
3) Open the Interface Cap ③.
4) Connect the battery charger ① to the power
connector of the printer.
①
5) Plug the power cord ② into an electrical outlet.
②
CAUTION
The printer may incur serious damage if the battery
charger provided by Zebra is not used. Zebra is
not legally liable for any such damages. (The voltage
and electrical current specifications of the printer
and battery charger must match.)
WARNING
Turn off the power before charging the battery for
the printer.
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2-2-2 Battery Holder (Optional) Usage
1) Connect the power cord ② to the battery charger ①.
④
2) Connect the battery charger ① to the power
connector of the battery holder ③.
③
3) Plug the power cord ② into an electrical outlet.
4) Insert the battery ④ into the battery holder ③ until
a snapping sound is heard.
①
②
2-2-3 EM Series Quad Charger (Optional) Usage
2-2-3-1 Connecting the cables
1) Connect the power cord to the adaptor, and
Connect the adaptor to the power connector of the
Quad Charger.
2) Plug the power cord into a power Outlet. Input
power is 100 ~ 240VAC, 50/60Hz, 1.4A.
NOTE
When power is supplied, the amber and green LED
turn on for two seconds.
WARNING
Use only designated AC/DC adaptor (12VDC, 5A)
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2-2-3-2 Battery Charging
1) Fasten batteries via the battery
hooks into the Quad Charger as
shown above.
2) Push the battery in until a snapping
sound is emitted.
3) Charging begins as soon as the
battery is completely inserted.
Batteries are charged to 8.4VDC, 0.8A.
4) Push the hook and pull up to extract
the battery.
NOTE
Battery charging status descriptions are as follows.
LED
Charging Status
Red LED On
Charging
Green LED Blinking
Over 80% Charged
Green LED On
Fully Charged
Error
Red LED Blinking
Replace or Reinstall Battery
Charge Time
2.5 hours
CAUTION
If the red LED is blinking, try removing and then reinserting the battery.
If the red LED continues to blink, please consult the reseller.
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2-3 Paper Installation
1) Press the Open button to open the paper cover.
2) Insert the paper as shown in the image.
(Remove any remaining core of a fully used paper roll.)
3) Ensure that you to align the paper correctly.
4) Pull the paper out as shown in the image and
close the paper cover.
5) Tear off any excess paper in the direction of the
side of the printer.
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2-4 Belt Strap Usage
Belt Strap
1) Insert the belt strap screw into the belt strap hole.
2) Use a coin to tighten the belt strap screw as
shown in the image.
Coin
Belt
3) Undo the belt strap Velcro.
4) Fasten the belt strap to a belt.
5) Close the Velcro as shown in the image.
Belt
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2-5 Leather Case (Optional) Usage
1) Undo the Velcro.
2) Place the printer into the leather case following
the direction shown in the image.
3) Close the Velcro.
4) Affix to a belt using the clip at the rear of the case.
Belt
NOTE
The clip on the leather case can be rotated two
stages by 30° per stage(maximum 60°).
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2-6 Control Panel Usage
• Power Button
This button is used to turn the printer on and off.
When the printer is off, pressing this button for approximately 2 seconds will turn
the power on. When the printer is on, pressing this button for approximately 2
seconds will turn the power off.
• Paper Feed Button
Paper output can be done manually by pressing this button.
In addition, self-testing and Hexadecimal Dumping can be done.
1) Refer to “2-10 Self-Test” for self-test information.
2) Refer to the service manual regarding Hexadecimal Dumping.
• Battery Status LED (Blue or Red)
1) If three blue LEDs are lit, the battery is fully charged.
2) If two blue LEDs are lit, the battery is half charged.
3) If one blue LED is lit, the battery is at the lowest charge level.
4) If the red LED is lit, the battery must be charged or replaced.
• Error LED (Red)
1) If the red LED is lit, the paper cover is open.
2) If the red LED is blinking, either the paper has been fully used or the print head
is overheated. (Fill with paper or turn the printer off for at least 10 minutes.)
3) If the red LED continues to blink, it may indicate a more serious problem with
the product, and thus an authorized service dealer should be consulted.
• Bluetooth LED (Green)
1) If the green LED turns on in unison with the battery status LED, the printer can
be used with Bluetooth wireless communication.
2) If only the green LED is lit, the printer has entered the power saving mode.
NOTE
The power saving mode is activated after the first communication, with the default
time interval being 10 seconds.
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2-7 MSR Usage
1) Press the MSR cover to open.
2) Insert the card as shown in the image and swipe
in the direction of the arrow.
(can be done in both directions)
3) When finished using, press the MSR cover to
close it.
NOTE
If the card does not register, first check to see if it is
properly aligned. When swiping the card, the
recommended swiping speed is 100 ~ 1500 mm/sec.
2-8 Self-Test
Run the self-test when first setting the printer or when encountering a problem, and check the following:
- Control Circuit, Mechanisms, Print Quality, ROM Version, and Memory Switch Settings
If no issue is found with the printer after running the self-test, examine the other devices or peripherals and
software. This function is independent of such other devices and software.
2-8-1 Self-Test Instructions
1) Turn the printer power off and close the printer paper cover.
2) Pressing the paper feed button and power button simultaneously turns the printer on.
3) The printout is produced after releasing the two buttons.
4) To add a printout of the ASCII pattern, press the paper feed button once more.
5) After the ASCII pattern is printed out, the self-test is automatically terminated.
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2-8-2 Self-Test Printout Sample
Boot loader version :
VER v2.01 20071005
Firmware version :
B01.00 STD 071108
Bluetooth Firmware version :
3.0.0
Bluetooth BD address :
001901223194
Auth. & Encry. are enable
Connection Mode = 2
================================
Butter Capacity : 128K Bytes
Print Density : 100%
Bluetooth Interface
- Baud rate : 115200 bps
Serial Interface
- Baud rate : 115200 bps
Data bits : 8 bits
Parity
: None
Stop bit
: 1 bit or more
Handshaking : DTR/DSR
Default Codepage : PC437
Print Speed : 80mm/s
Double byte character mode:Off
Busy printer buffer full
Font : 12 x 24
Paper out Bell : Off
Low Battery Buzzer : On
Power off time : 15 Min
Idle mode time : 10 Sec
Two Dimension Symbol :
- Selected PDF417 symbol
- Selected DATAMATRIX symbol
- Selected MAXI code symbol
- Selected QR code symbol
MSR read mode : Auto TRACK1/2/3
If you want to continue
SELF-TEST printing,
please press FEED button.
ASCII
!" #$%& '()* +,-./ 0123 4567 89:;< =>? @
"# $%&' ()*+ ,-./0 1234 5678 9:;<= >?@ A
#$ %&'( )*+, -./01 2345 6789 :;<=> ?@A B
$% &'() *+,- ./012 3456 789: ;<=>? @AB C
%& '()* +,-. /0123 4567 89:; <=>?@ ABC D
&' ()*+ ,-./ 01234 5678 9:;< =>?@A BCD E
'( )*+, -./0 12345 6789 :;<= >?@AB CDE F
() *+,- ./01 23456 789: ;<=> ?@ABC DEF G
)* +,-. /012 34567 89:; <=>? @ABCD EFG H
*+ ,-./ 0123 45678 9:;< =>?@ ABCDE FGH I
+, -./0 1234 56789 :;<= >?@A BCDEF GHI J
,- ./01 2345 6789: ;<=> ?@AB CDEFG HIJ K
-. /012 3456 789:; <=>? @ABC DEFGH IJK L
./ 0123 4567 89:;< =>?@ ABCD EFGHI JKL M
/0 1234 5678 9:;<= >?@A BCDE FGHIJ KLM N
01 2345 6789 :;<=> ?@AB CDEF GHIJK LMN O
12 3456 789: ;<=>? @ABC DEFG HIJKL MNO P
23 4567 89:; <=>?@ ABCD EFGH IJKLM NOP Q
34 5678 9:;< =>?@A BCDE FGHI JKLMN OPQ R
45 6789 :;<= >?@AB CDEF GHIJ KLMNO PQR S
56 789: ;<=> ?@ABC DEFG HIJK LMNOP QRS T
67 89:; <=>? @ABCD EFGH IJKL MNOPQ RST U
78 9:;< =>?@ ABCDE FGHI JKLM NOPQR STU V
89 :;<= >?@A BCDEF GHIJ KLMN OPQRS TUV W
9: ;<=> ?@AB CDEFG HIJK LMNO PQRST UVW X
Memory switch setup status
Memory S/W1
12345678
ON
██ █
OFF
██
█ ██
Memory S/W2
12345678
ON
OFF
████████
PC437
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Memory S/W3
12345678
ON
OFF
████████
Memory S/W5 (Power off time)
12345678
ON
████
OFF
████
Memory S/W6 (Idle time)
12345678
ON
█ █
OFF
█ █ ████
Memory S/W7
12345678
ON
███
OFF
█████
Memory S/W8
12345678
ON
OFF
████████
Memory S/W Serial condition
12345678
ON
OFF
████████
Rev. 1.04
- 17 -
Mobile Printer Service Manual
EM 220
2-9 Hexadecimal dumping
This feature allows experienced users to see exactly what data is coming to the printer.
This can be useful in finding software problems. When you turn on the hexadecimal dump function, the
printer prints all commands and other data in hexadecimal format along with a guide section to help you find
specific commands.
• To use the hexadecimal dump feature, follow these steps:
1) Turn off the printer, remove the paper roll from the paper housing, and open the paper cover.
2) Hold down the FEED button while you turn on the printer.
3) Put the paper roll in the printer and close the paper cover.
4) Run any software program that sends data to the printer. The printer prints "Hexadecimal dump" and
then all the codes are received in a two column format. The first column contains the hexadecimal codes
and the second column gives the ASCII characters that correspond to the codes.
Hexadecimal Dump
To terminate hexadecimal dump
Press FEED button three times
1B 21 00 1B 26 02 40 40 . ! . . & . @ @
1B 25 01 1B 63 34 00 1B . % . . c 4 . .
41 42 43 44 45 46 47 48 A B C D E F G H
<Online Hex Dump Completed>
(A period(.) is printed for each code that has no ASCII equivalent.)
5) If the feed button is pressed 3 times., the printer finishes Hexadecimal dump mode, printing the
message “Online Hex Dump Completed” on the paper.
Rev. 1.04
- 18 -
Mobile Printer Service Manual
EM 220
2-10 Label Printing Function
2-10-1 Label Function Setting
Label paper and black mark paper available at the label mode
• Setting Operations
1) Turn on the printer power.
2) Open the paper cover and press and hold down the paper feed button for longer than two seconds.
3) After the buzzer tone is emitted, insert paper and close the cover.
4) Repeat the steps above to return to receipt mode.
• Setting Via Memory Switch
- Please refer to the memory switch changing section of the Commands Manual.
2-10-2 Auto Calibration Function
The label printing function requires the recognition of label paper gaps and black mark paper black bar in
order to print.
If label paper gaps are not properly recognized, use the auto calibration function.
•2-10-3 Auto Calibration Instructions
1) Turn the printer power off while in label print mode.
2) Press and hold down the paper feed button and then press the power button.
3) After the following printout is outputted, press the power button to perform auto calibration.
Select the mode
Auto Calibration: Power Button
Self Test: Feed Button
4) Three pages of label paper are outputted when performing auto calibration.
Rev. 1.04
- 19 -
Mobile Printer Service Manual
EM 220
2-11 Peripherals Connection
This product can communicate with other devices via Bluetooth communication and cable.
2-11-1 Bluetooth Connection
1) The printer can be connected to devices equipped
with Bluetooth communication capacity
(PDAs, PCs, etc.).
2) Use the Bluetooth connection function supported
by the device to connect to the printer.
NOTE
Refer to the Bluetooth Manual for more details on
connection.
You can check authentication, Encryption mode as
well as connection mode of the Bluetooth from self
test page.
CAUTION
The Bluetooth connector located on the right side of the printer is for program downloading only.
This connector is for service providers only.
2-11-2 Interface Cable Connection
1) Open the Interface Cap ①.
2) Connect the interface cable (optional) ② to the
cable connector of the printer.
NOTE
Use only cables (optional) provided by Zebra (USB,
Serial).
①
②
Rev. 1.04
3) Connect the interface cable to the USB port of the
device (PDAs, PCs, etc.).
NOTE
The interface cable that can be connected with the
printer is available in both USB and Serial type.
Refer to the service manual for detailed interface
cable specifications.
- 20 -
Mobile Printer Service Manual
EM 220
3. Product Specifications
3-1 General Specifications
NOTE
Printer specifications are subject to change without notice.
Item
Model
Processor
Memory
Interface
Paper Supply Mode
Barcode
Emulation
Product
Driver
SDK
Sensor
Cutter Type
Dimensions
Weight
Printing
Character
Firmware &
character sets
Paper
Battery
charger
Battery
pack
Reliability
Usage
Conditions
Accessories
Method
Direction
Speed
Width
Line feed
Resolution
Font type
Character structure
Character size
Printing columns
Column interval
Line interval
Character spacing
Language type
Firmware naming
Font A, B
Language font
Common font
Paper Type
Width
Diameter
Thickness
Input
Output
Type
Output
Charging time
TPH
Battery
Drop test condition
Temperature
Humidity
Model
Basic Package
Sold Separately
Rev. 1.04
Description
EM 220 (Refer to 3-2-1 Printer Classification)
S3C2410 (ARM920T)
• 29W160 (16Mbit flash memory), • K4S641632 (64Mbit SDRAM)
• Serial/USB, • Bluetooth Class2 V2.0 +EDR
Easy paper loading
• 1 Dimension: UPC A, UPC E, CODE 39, CODE 93, Code 128,
EAN 8, EAN 13, ITF, Codabar
• 2 Dimension: PDF417, MAXI, QR, Datamatrix
BXL/POS
Windows 98 / ME / 2000 / NT 4.0 / XP / WEPOS / 2003 Server /
VISTA
Windows 98 / ME / 2000 / NT 4.0 / XP / WEPOS / 2003 Server /
VISTA / Windows CE 4.1 and later
• Paper End: Reflection type photo sensor
• Paper Cover Open: Micro switch
Tear-Bar
79.5 × 126.7 × 43.6 mm (3.13 × 4.99 × 1.72˝)
• Printer: 184g (0.41lbs.)
• Printer + Battery: 236g (0.52lbs.)
• Printer + Battery + Paper: 293g (0.65lbs.)
• Package: approx. 1000g (2.2lbs.)
Direct Thermal Line Printing
Uni-direction with friction feed
80 mm/sec (3.15 in./sec)
48 mm (1.89˝)
3.75 mm (0.15˝)
203 DPI (Total dot count of horizontal direction: 384 dots)
Font KOR,CHN,JPN
Font A
Font B
24 x 24 dots
12 x 24 dots
9 x 24 dots
3x3mm (0.12x0.12˝)
1.5x3mm (0.06x0.12˝)
1.125x3mm (0.044x0.12˝)
16 CPL (8.45 CPI)
32 CPL (16.9 CPI)
42 CPL (22.2 CPI)
3 mm (0.12˝)
1.5 mm (0.06˝)
1.125 mm (0.044˝)
3.75 mm (0.15˝, 30 dots)
0.75 mm (0.03˝, 6 dots)
Standard
Chinese
Japanese
Korean
Bxx.xx STD
Bxx.xx CHN
Bxx.xx JPN
Bxx.xx KOR
128x30pages
128x20pages
GB2312, BIG5
Shift-JIS
KS5601
Alphanumeric: 95, International: 32
Thermal paper roll
58 ± 0.5 mm (2.28 ± 0.2˝)
Max. ø40 mm (1.57˝)
0.06 ~ 0.10 mm (0.0024 ~ 0.0039˝)
• Voltage: 100 ~ 250 VAC • Current: 0.5 A
• Voltage: 8.4 VDC • Current: 0.8 A
Lithium-ion
• Voltage: 7.4 VDC (Operating Range: 8.4 ~ 6.8 VDC)
• Capacity: 1200 mAh
2.5 hours
120 km
Rechargeable up to 500 times
• Drop directions: 1 corner, 3 edges and 6 surfaces. (10 drops)
• Product drop height: 1.2m (Approx. 4ft.)
• Packing drop height: 0.76m (Approx. 2.5ft.)
• Printer: -10~50℃ (14~122℉), • Battery: 0~40℃ (32~104℉)
• Printer: 10~90% RH (No condensation)
• Battery: 20~70% RH (No condensation)
P100xxxx : Refer to 3-3-1 Accessories Classification
Battery, Battery charger, Belt strap, Cleaning pen
Battery, Battery cradle, Leather case, Interface cable, EM Series Quad
charger, Wall mount (for EM Series Quad charger)
- 21 -
Mobile Printer Service Manual
EM 220
3-2 Printer Specifications
3-2-1 Product Configurator – EM series
Rev. 1.04
- 22 -
Mobile Printer Service Manual
EM 220
3-2-2 Printer Appearance
3-2-2-1 Printer Dimensions (mm)
Rev. 1.04
- 23 -
Mobile Printer Service Manual
EM 220
3-2-2-2 Feature Locations
1) Front
Paper Cover
Power Button
Paper Feed
Button
Open Button
MSR Cover
BT Cap (Bluetooth Download Connector)
2) Rear
Belt Strap Hole
Battery
Interface Cap
Cable Connection
Power Connection
Rev. 1.04
- 24 -
Mobile Printer Service Manual
EM 220
3-2-3 Other Component Specifications
TPH
Motor
3 Track MSR head
Item
Heat element structure
Number of heat elements
Heat element pitch
Print width
Average resistance value (Rave)
Voltage
Current
Phase
Exciting method
Exciting mode
Step angle
Rotation
Inductance
DC resistance
Bluetooth Specification
Frequency
Modulation
Transmission
Bluetooth
module
Rev. 1.04
Receive Sensitivity .
Maximum Output Power
Operating Voltage
Current Consumption
Operating Temperature
Antenna Impedance
Flash Memory
Package Size
- 25 -
Description
2 heaters/dot
384 dots
8.0 dots/mm (0.125 mm pitch)
48 ± 0.2 mm
176Ω ± 4 %
5.0 VDC ± 10%
420 mA (Per phase)
4 Phase
2-2 Phase (Bipolar – Constant A)
Bipolar
18° (2-2 Phase)
CW/CCW (Bi-direction)
80 mH ± 30 %
180 Ω ± 25 %
Version 2.0 +EDR
2402 ~ 2480 MHz
1M = GFSK
2M = ∏/4-DQPSK
3M = 8DPSK
GFSK = 721 kbps
∏/4-DQPSK = 1448.5 kbps
8DPSK = 2178.1 kbps
-80 dBm
+2 dBm
2.7 ~ 3.6 V
Maximum 39.1mA
-30 ~ +70 ℃
50Ω
8M bit
11 x 11 x 1.6 mm
Mobile Printer Service Manual
EM 220
3-3 Service Parts List
1
2
3
4
5
6
7
8
9
14
15
16
No.
1
2
3
4
5
6
7
8
9
Model name
P1002471
P1002472
P1002473
P1002474
P1002477
P1002478
P1002479
P1002481
P1002482
10
P1002508-001
11
P1002508-002
12
P1002508-003
13
P1002508-004
14
15
16
P1006472
P1006478
P1006479
Rev. 1.04
10-13
Description
KIT EM220 LWR HSG ASY NO MCR
KIT EM220 LWR HSNG ASY W/MCR
KIT EM220 MEDIA COVER ASSY
KIT EM220 UPR CVR ASY NO MCR
KIT EM220 UPPER CVR ASSY MCR
KIT EM220 PCB CNTR & FFC ASY
KIT EM220 PRINT MECH ASSY
KIT EM220 MOTOR ASSY
KIT EM220 MAG CARD REDR ASSY
KIT EM220 "G" MAIN PCB ASSY
without MCR or BT function
KIT EM220 "GM" MAIN PCB ASSY
with MCR function only
KIT EM220 "BGM" MAIN PCB ASY
with MCR and BT function
KIT EM220 "BG" MAIN PCB ASY
with BT function only
KIT EM220 RUBBER CAP BT (5)
KIT EM220 RUBBER CAP IF (5)
KIT EM220 COVER BT CAN (5)
- 26 -
Remark
Mobile Printer Service Manual
EM 220
3-4 Accessories Specifications
3-4-1 Accessories List
No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
Rev. 1.04
Model name
P1002512
P1002513
P1002513-1
P1002514
P1002517
P1005085
P1002516
P1002519
P1004365
P1004366
P1002518
P1002520
P1006363
P1002521
P1002522
P1002523
P1002524
P1002526
P1004367
P1004368
P1002528
P1002527
P1004374
P1004374-1
P1004375
P1005087
P1004376
P1004377
P1004378
P1004379
P1004380
P1004381
P1006364
P1004382
Description
Battery Pack
Battery Charger
Battery Charger - US
Battery Cradle
Power Cord - US
Power Cord - Japan
Power Cord - EU
Power Cord - AU
Power Cord - CN
Power Cord - AG
Power Cord - UK
Power Cord - KR
Power Cord - BR
IF Cable - Serial
IF Cable - USB
Leather Case
Belt Strap
Pen Cleaning
Manual - CD
Manual - Quick Start - AP
Manual - Quick Start - World Wide
Paper - Thermal Roll
EM Series Quad Charger
EM Series Quad AC/DC Adapter
EM Quad AC/DC Adapter - US
Quad Power Cord - US
Quad Power Cord - Japan
Quad Power Cord - EU
Quad Power Cord - AU
Quad Power Cord - CN
Quad Power Cord - AG
Quad Power Cord - UK
Quad Power Cord - KR
Quad Power Cord - BR
Quad Wall Mount
- 27 -
Remark
Mobile Printer Service Manual
EM 220
3-4-2 Accessories Appearance
95mm
(3.74")
43mm
(1.69")
14mm
(0.55")
70mm
(2.76")
28mm
(1.1")
32mm
(1.26")
55mm
(2.17")
70mm
(2.76")
54mm
(2.13")
• Battery pack
• Battery cradle
• Battery charger
130mm
(5.19")
48mm
(1.89")
• Power Cord
• Interface Cable
84mm
(3.31")
• Leather case
94mm
(3.7")
14mm
(0.55")
28mm
(1.1")
• Belt strap
• Pen Cleaning
• Paper - Thermal Roll
• Manual - Quick Start
Rev. 1.04
• Manual - CD
- 28 -
Mobile Printer Service Manual
EM 220
150mm
(5.9")
55mm
(2.17")
300mm
(11.81")
• EM Series Quad charger
• Quad Wall Mount
• Quad Power Cord
Rev. 1.04
- 29 -
Mobile Printer Service Manual
EM 220
3-4-3 P1002513 Battery charger
Item
Description
100~250VAC
50 / 60Hz
0.5A Max. at 110VAC input
Lithium ion 2 cell
8.4VDC
0.8A ± 10%
Voltage
Line frequency
Current
Battery type
Charging voltage
Charging current
Input
Output
3-4-4 P1002514 Battery cradle
Item
Input
Output
Description
8.4VDC
0.8A ± 10%
Lithium ion 2 cell
8.4VDC
0.8A ± 10%
Charging voltage
Charging current
Battery type
Charging voltage
Charging current
3-4-5 P1002512 Battery pack
Item
Input
Output
Description
Lithium-ion
8.4VDC
0.8A ± 10%
Cell type
Charging voltage
Charging current
Charging time
Voltage
Capacity
2.5 hours
7.4VDC (Available 8.4~6.8VDC)
1200 mAh
3-4-6 P1002527 EM Series Quad charger
Item
SMPS Input
SMPS Output &
Quad charger Input
Quad charger output
Rev. 1.04
Description
100~240VAC
50 / 60Hz
1.4A Max. at 110VAC input
12VDC (± 10%)
5A Max. at 12VDC input
8.4VDC
0.8A ± 10%
Voltage
Line frequency
Current
Voltage
Current
Charging voltage
Charging current
- 30 -
Mobile Printer Service Manual
EM 220
3-4-7 Interface cable for PC
1) P1002521 Serial cable connection for PC
(GND) 1
2 (RXD)
(TXD) 2
3 (TXD)
(RXD) 3
Printer
side
(10Pin)
(RTS) 4
4 (DTR)
(CTS) 5
5 (GND)
(GND) 6
(GND) 7
Host
Side
(9Pin)
6 (DSR)
(N C) 8
7 (RTS)
(N C) 9
(GND) 10
8 (CTS)
2) P1002522 USB cable connection for PC
(GND) 1
1 (N C)
(N C) 2
(N C) 3
Printer
side
(10Pin)
(N C) 4
2 (D-)
(N C) 5
(GND) 6
Host
side
(4Pin)
3 (D+)
(GND) 7
(D+) 8
(D-) 9
4 (GND)
(GND) 10
Rev. 1.04
- 31 -
Mobile Printer Service Manual
EM 220
3) Serial / USB signal descriptions
Pin No.
1
2
3
Signal name
GND
TXD
RXD
Direction
Output
Input
4
nRTS
Output
5
6
7
8
9
10
nCTS
GND
GND
D+
DGND
Input
-
Function
Ground
Transmit data
Receive data
Request to send
Set high when printer is ready to accept a
command or data
Clear to send from host
Ground
Ground
Differential data line
Differential data line
Ground
4) Serial / USB output connector
Rev. 1.04
- 32 -
Mobile Printer Service Manual
EM 220
4. Hardware
4-1 Wiring diagram
1) Main board TOP wiring diagram
JTAG
Connector
J8
Interface
Connector
Rev. 1.04
J9
J1
MSR
Connector
J2
J3
Head & Motor & Sensor
Connector
- 33 -
Operation panel
connector
J6
Bluetooth SPI
Connector
J4
Power Jack
DC
Mobile Printer Service Manual
EM 220
2) Main board BOTTOM wiring diagram
J7
Battery Connector
3) Interface Connector and Bluetooth SPI Connector
Pin No.
1
2
3
4
5
6
7
8
9
10
Rev. 1.04
Interface Connector
Function
GND
TXD (Serial)
RXD (Serial)
nRTS (Serial)
nCTS (Serial)
GND
GND
D+ (USB)
D- (USB)
GND
Remark
Pin No.
1
2
3
4
5
6
7
8
- 34 -
Bluetooth SPI Connector
Function
Remark
VCC_3.3V
BT_RST
SPI_CLK
SPI_MOSI
SPI_CSB
SPI_MISO
GND
GND
Mobile Printer Service Manual
EM 220
4-2 Block Diagram
Rev. 1.04
- 35 -
Mobile Printer Service Manual
EM 220
5. Disassembly and Exploded view
5-1 Disassembly
5-1-1 Remove the Battery
Part name
(1) Cover lower-M
(2) Battery
Assembly procedure
1) Remove the (2) Battery from the (1) Cover lower-M.
CAUTION
The main PCB and FPC can be damaged severely if you disassemble the printer without
removing the battery.
Rev. 1.04
- 36 -
Mobile Printer Service Manual
EM 220
5-1-2 Remove the ASSY-cover upper
6
Part name
(1) Cover lower-M
(2)(3) Screw
(4) Assy-cover upper-M
(5) Rubber-cap BT
(6) Rubber-cap IF
Rev. 1.04
Assembly procedure
1) Loosen four (2)(3) Screw from the (1) Cover lower-M and then remove
the (4) Assy-cover upper-M.
2) Remove the (5) Rubber-cap BT and the (6) Rubber-cap IF.
- 37 -
Mobile Printer Service Manual
EM 220
5-1-3 Assy-cover upper
7
8
1
6
5
3
4
2
2
2
Part name
(1) Cover lower-M
(2) Screw
(3) Assy-PCB-control
(4) FFC
(5) Button control
(6) Window LED
(7) Button open
(8) SP-button
Rev. 1.04
Assembly procedure
1) Loosen three (2) Screw from the (1) Cover upper-M and then remove
the (3) Assy-PCB-control.
2) Remove the (4) FFC from the (3) Assy-PCB-control.
3) Remove the (5) Button control and the (6) Window LED.
4) Remove the (7) Button open and then remove the (8) SP-button.
- 38 -
Mobile Printer Service Manual
EM 220
5-1-4 Remove the Assy-mechanism
2
2
2
3
1
Part name
(1) Cover lower-M
(2) Screw
(3) Assy-mechanism
Rev. 1.04
Assembly procedure
1) Loosen three (2) Screw from the (1) Cover lower-M and then remove
the (3) Assy-mechanism.
- 39 -
Mobile Printer Service Manual
EM 220
5-1-5 Assy-mechanism
25
2
25
2
23
24
23
3
22
4
4
10
6
5
16
6
11
6
17
12
7
9
1
26
8
12
14
13
13
21
18
20
15
Part name
(1) Basket paper
(2) Screw
(3) F-cutter manual
(4) Screw
(5) Jumper cable
(6) Screw
(7) F-gear train
(8) Washer
(9) Gear re-A
(10) Gear re-B
(11) Gear idle
(12)(13)(14) Screw
(15) Assy-sub-FPC-main
(16) Arm locking-L
(17) SP-locking-L
(18) SH-locking
(19) Arm locking-R
(20) SP-locking-R
(21) Screw
(22) F-brkt motor
(23) SP-TPH
(24) Assy-TPH
(25) Bush-bracket
(26) Lable-hot
Rev. 1.04
19
Assembly procedure
1) Loosen two (2) Screw from the (1) Basket paper and then remove the
(3) F-cutter manual.
2) Loosen two (4) Screw and then remove the (5) Jumper cable.
3) Loosen three (6) Screw and then remove the (7) F-gear train.
4) Remove the (8) Washer, the (9) Gear re-A, the (10) Gear re-B and the
(11) Gear idle.
5) Loosen five (12)(13)(14) Screw and then remove the (15) Assy-subFPC-main.
6) Remove the (16) Arm locking-L and then the (17) SP-locking-L.
7) Remove the (18) SH-locking and then remove the (19) Arm locking-R
and the (20) SP-locking-R.
8) Loosen the (21) Screw and the remove the (22) F-brkt motor and two
(23) SP-TPH.
9) Remove the (24) Assy-TPH and then remove two (25) Bush-bracket.
10) Remove the (26) Label-hot.
- 40 -
Mobile Printer Service Manual
EM 220
5-1-6 Remove the Assy-PCB-main
2
3
1
Part name
(1) Cover lower-M
(2) Screw
(3) Assy-PCB-main
Rev. 1.04
Assembly procedure
1) Loosen the (2) Screw from the (1) Cover lower-M and then remove the
(3) Assy-PCB-main.
- 41 -
Mobile Printer Service Manual
EM 220
5-1-7 Remove the Assy-MSR
2
2
3
1
Part name
(1) Cover lower-M
(2) Screw
(3) Assy-MSR
Rev. 1.04
Assembly procedure
1) Loosen two (2) Screw from the (1) Cover lower-M and then remove
the (3) Assy-MSR.
- 42 -
Mobile Printer Service Manual
EM 220
5-1-8 Assy-MSR
2
2
3
4
10
4
11
9
1
8
7
10
6
5
13
12
Part name
(1) Housing MSR
(2) Scrw
(3) Head MSR
(4) Screw
(5) Cover MSR
(6) Screw
(7) Housing toggle
(8) Arm toggle
(9) SP-toggle
(10) E-ring
(11) SH-MSR
(12) SP-MSR
(13) F-MSR
Rev. 1.04
Assembly procedure
1) Loosen two (2) Screw from the (1) Housing MSR and then remove the
(3) Head MSR.
2) Loosen two (4) Screw and then remove the (5) Cover MSR.
3) Loosen the (6) Screw and then remove the (7) Housing toggle, (8)
Arm toggle and (9) SP-toggle.
4) Remove two (10) E-ring and then remove the (11) SH-MSR, the (12)
SP-MSR, the (13) F-MSR.
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Mobile Printer Service Manual
EM 220
5-1-9 Remove the Assy-cover lower
8
2
3
4
7
6
1
2
Part name
(1) Cover lower-M
(2) Screw
(3) Holder pivot-L
(4) SP-pivot-L
(5) Holder pivot-R
(6) SP-pivot
(7) SH-pivot
(8) Assy-cover paper
Rev. 1.04
5
Assembly procedure
1) Loosen two (2) Screw from the (1) Cover lower-M and then remove
the (3) Holder pivot-L and the (4) SP-pivot-L
2) Remove the (5) Holder pivot-R and then remove the (6) SP-pivot then
3) Remove the (7) SH-pivot and then remove the (8) Assy-cover paper.
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Mobile Printer Service Manual
EM 220
5-1-10 Assy-cover paper
Part name
(1) Cover paper
(2) Screw
(3) Window paper
(4) Screw
(5) Protector PE
(6) SH-rubber roller
(7) Gear feeding
(8) Label-paper
Rev. 1.04
Assembly procedure
1) Loosen two (2) Screw from the (1) Cover paper and then remove the
(3) Window paper.
2) Loosen the (4) Screw and then remove the (5) Protector PE.
3) Remove the (7) Gear feeding from the (6) SH-rubber roller.
4) Remove the (8) Label-paper
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Mobile Printer Service Manual
EM 220
5-2 Exploded view
5-2-1 EM 220 without MSR
Rev. 1.04
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Mobile Printer Service Manual
EM 220
5-2-2 EM 220M with MSR
Rev. 1.04
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Mobile Printer Service Manual
EM 220
6. Adjustments and Maintenance
6-1 Printer Cleaning
If the interior of the printer is dusty, print quality can decline.
In such a case, follow the instructions below to clean the printer.
CAUTION
• Make sure to turn the printer power off prior to cleaning.
• The print head gets very hot during printing. Before cleaning the print head, turn the printer
power off and wait approximately 10 minute before commencement.
• When cleaning the print head, do not to touch the heated portion of the print head.
(The print head is susceptible to damage from static electricity, etc.)
• Do not allow the print head to become scratched and/or damaged in any way.
②
①
1) Open the paper cover and remove any paper that may be present.
2) Wipe the print head ① with a cleaning pen.
3) Use a cloth moistened with an alcohol solution to clean the paper sensor ② and remove any paper
remnants and/or dust.
4) Insert paper into the printer 1~2 minutes after completing the cleaning process and close the printer
cover.
Rev. 1.04
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Mobile Printer Service Manual
EM 220
7. Troubleshooting
Every undesired outcome can be investigated with fault tree analysis which is one of RCA (Root Cause
Analysis). Fault tree analysis is a graphical representation of the major faults or critical failures associated
with a product, the causes for the faults, and potential countermeasures. This way user can identify possible
causes easily.
There are six undesired outcome, divided by symptom category :
z Inadequate LED response
z Printing trouble
z MSR operation
z Diagnostic (self-test / hexa-decimal dump)
z Communication interface
7-1 Inadequate LED response
E1-1 : Poor insert battery
E1-2 : Poor parts
E1-3 : Discharged battery
E1-4 : Regulator failure
E1-5 : MCU failure
E1-6 : Poor
E1-7 : Cover open sensor failure
E1-8 : MCU failure
Rev. 1.04
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Mobile Printer Service Manual
EM 220
7-2 Printing trouble
E2-1 : MCU failure
Rev. 1.04
E2-2 : TPH failure
E2-3 : Battery is almost exhausted
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E2-4 : TPH becomes aged
Mobile Printer Service Manual
EM 220
7-3 MSR operation
E3-1 : Poor MSR head of assembly
E3-5 : Main PBA failure
Rev. 1.04
E3-2 : Wrong setting value
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E3-3 : Card failure
E3-4 : MSR head failure
Mobile Printer Service Manual
EM 220
7-4 Diagnostic (self-test / hexa-decimal dump)
E4-1 : Regulator failure
E4-5 : Mechanism ass’y
failure
Rev. 1.04
E4-2 : Mistake for choosing a cable
E4-3 : Failure in the setting up parameter
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E4-4 : Main PBA failure
Mobile Printer Service Manual
EM 220
7-5 Communication Interface
E5-1 : Mistake for choosing
a cable
Rev. 1.04
E5-2 : Failure in the setting up parameter
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E5-3 : Rejected by security
(connection mode 1)
E5-4 : Rejected by security
(invalid PIN code)
Mobile Printer Service Manual