Casio CASSIOPEIA IT-2000D User manual

P
0123
456
789
Data Collector
Colector de Datos
Datenerfassungsgerät
Collecteur de Données
User’s Guide
Guía del usuario
Bedienungsanleitung
Mode d’emploi
• Congratulations upon your selection of
the CASIO IT-2000 Data Collector.
• Be sure to familiarize yourself with the
basic operations described in this
manual before actually trying to
operate the Data Collector.
• Enhorabuena por la selección del
colector de datos IT-2000 CASIO.
• Antes de intentar utilizar este colector
de datos, familiarícese con las
operaciones básicas descritas en este
manual.
• Mit dem Datenerfassungsgerät CASIO
IT-2000 haben Sie eine gute Wahl
getroffen.
• Bitte machen Sie sich mit den in
diesem Handbuch beschriebenen
Grundfunktionen vertraut, bevor Sie
beginnen, mit dem
Datenerfassungsgerät zu arbeiten.
• Nous vous remercions d’avoir choisi le
Collecteur de Données Casio IT-2000.
• Veuillez vous familiariser avec les
démarches de base, décrites dans ce
manuel, avant d’essayer d’utiliser le
Collecteur de Données.
Imprimé au Japon
Printed in Japan
AB9906-0003501A P
Printed on recycled paper.
Imprimé sur papier recyclé.
Gedruckt auf wiederverwertetem Papier.

E-3
Congratulations upon your selection of this CASIO Product. Be sure to read
the following Safety Precautions before trying to use it for the first time.
Keep this manual in a handy place for future reference.
Safety Precautions
The following are the meanings of the markings and symbols
used in these Safety Precautions to warn you against the
possibility of personal injury and/or material damage or loss
to you and others. Take a few moments to become familiar
with these markings and symbols so you can avoid future
problems.
This symbol indicates information that, if ignored or
applied incorrectly, creates the danger of death or serious
personal injury.
This symbol indicates information that, if ignored or
applied incorrectly, can create the possibility of death or
serious personal injury.
This symbol indicates information that, if ignored or
applied incorrectly, can create the possibility of personal
injury or material damage.
A triangular shape indicates you should exercise
caution. The symbol shown here indicates you
should take care to avoid breakage.
A circle indicates something you should not do.
This symbol indicates you should not try to
take something apart.
A black circle indicates something you must
do. This symbol indicates you should unplug
something.
Danger!
Warning!
Caution!
Marking examples
Markings and Symbols

E-4
Danger!
■Supplied Lithium-ion Battery Pack
●Never allow the battery pack to become wet with either fresh water or salt
water. Water can create the danger of battery pack heat emission, explosion,
and fire.
●Never use or leave the battery pack next to open flame, near a stove, or any
other area exposed to high heat. Doing so creates the danger of battery
pack heat emission, explosion, and fire.
●Never use the battery pack with any device other than the Data Collector.
Doing so can create the danger of battery pack heat emission, explosion,
and fire.
●Note that the battery pack’s positive (+) and negative (–) terminals must be
oriented correctly when it is loaded into the charger unit or the Data
Collector. Connecting the battery pack with its terminals reversed creates the
danger of battery pack fluid leakage, heat emission, explosion, and fire.
●Never dispose of the battery pack by incinerating it or otherwise expose it to
heat. Doing so creates the danger of battery pack heat emission, explosion,
and fire.
●Never allow the positive (+) and negative (–) terminals of the battery pack to
become connected (shorted) by metal. Doing so creates the danger of
battery pack heat emission, explosion, and fire.
●Never transport or store the battery pack together with a necklace, hair pins
or other metal objects. Doing so can short battery pack terminals, creating
the danger of battery pack heat emission, explosion, and fire. Be sure to
place the battery pack in its case whenever transporting or storing it.
●Never throw the battery pack or otherwise subject it to strong impact. Doing
so creates the danger of battery pack heat emission, explosion, and fire.
●Never pierce the battery pack with nails, hit it with a hammer, or step on it.
Doing so can create the danger of battery pack heat emission, explosion,
and fire.
●Never try to take apart the battery pack or modify it in any way. Doing so
creates the danger of battery pack heat emission, explosion, and fire.
●Use only the specified charger unit to charge the battery pack. Use of
another type of charger unit creates the danger of battery pack heat
emission, explosion, and fire.

E-5
Warning!
■Disassembly and Modification
●Never try to disassemble or modify the Data Collector in any way. High
voltage inside creates the danger of electric shock. There are hot parts
inside the printer. Do not touch these parts with your hands. Doing so can
cause burns.
■Interior Parts and Components
●Never touch interior high-voltage parts or components. Doing so creates the
danger of electric shock.
●The printer motor and the area around the head become hot. Do not touch
these parts with your hands. Doing so can cause burns.
■Abnormal Conditions
●Should the Data Collector become hot or start to emit smoke or a strange
odor, immediately turn off the power and contact your original dealer or an
authorized a CASIO service provider. Continued use creates the danger of
fire and electric shock.
■Foreign Objects
●Should any foreign matter get into the Data Collector, immediately turn off
the power and contact your original dealer or an authorized a CASIO service
provider. Continued use creates the danger of fire and electric shock.
■Dropping and Damage
●Should you drop the Data Collector and damage it, immediately turn off the
power and contact your original dealer or an authorized a CASIO service
provider. Continued use creates the danger of fire and electric shock.
■Moisture
●Keep the Data Collector away from vases, planters, cups, glasses and other
containers of liquid. Also keep it away from metal. Water and metal getting
into the Data Collector creates the danger of fire and electric shock.

E-6
Warning!
■Battery Handling
●Never try to take batteries apart, modify them, or allow their positive and
negative poles to be connected (become shorted). Do not expose batteries
to heat, and never throw batteries into fire.
• When you remove the lithium-ion battery from the Data Collector, take
care to keep it in a place where there is no danger of it being accidentally
swallowed. Be especially careful around small children.
●Keep batteries out of the reach of small children. If a battery is accidentally
swallowed, consult a physician immediately.
■Supplied Lithium-ion Battery Pack
●Never place the battery pack in a microwave oven or any other high-voltage
device. Doing so creates the danger of battery pack heat emission,
explosion, and fire.
●Should the battery pack emit a strange odor or heat, change color or shape,
or exhibit any other abnormal behavior, immediately stop using it. Continued
use creates the danger of battery pack heat emission, explosion, and fire.
●If the battery pack does not achieve full charge after the normal charging
time has passed, stop charging. Continued charging creates the danger of
battery pack heat emission, explosion, and fire.
●Should the battery pack start to leak or emit a strange odor, immediately
move it away from any nearby flame. Leaking battery fluid is combustible,
and exposure to flame creates the danger of explosion and fire.
●Should fluid from the battery pack accidentally get into your eyes, do not rub
them. Immediately rinse your eyes with clean tap water and then consult a
physician immediately.
■AC Power Supply
●Do not use the Data Collector at a voltage other than the specified voltage of
100VAC. Also, do not connect the Data Collector to a multi-plug power strip.
Doing so creates the danger of fire and electric shock.
●Avoid conditions that can cause damage or breaks in the power cord. Do not
place heavy objects on the power cord and keep it away from sources of
heat. Any of these conditions can damage the power cord, creating the
danger of fire and electric shock.
●Never modify, sharply bend, twist, or pull on the power cord. Doing so
creates the danger of fire and electric shock.
●Use only the specified charger unit DT-9020ADP (sold separately). When
using the I/O box, be sure to use the AC adapter DT-825ADP (sold
separately). Use of anotherAC adapter model or charger creates the danger
of fire and electric shock.
●Should the power cord become severely damaged (to the point that wires
are exposed or broken), contact your original dealer or a CASIO service
provider about repair or replacement. Use of a damaged electrical cord
creates the danger of fire and electric shock.

E-7
Caution!
■Foreign Objects
●Take care to ensure that metal or combustible objects are not inserted into
the openings of the Data Collector. Such objects create the danger of fire
and electric shock.
■Location
● Do not locate the Data Collector on a surface that is unstable or uneven. Doing so
creates the danger of the Data Collector falling, which can cause personal injury.
●Do not locate the Data Collector in an area subject to large amounts of
humidity or dust. Doing so creates the danger of fire and electric shock.
● Do not leave the Data Collector for long periods in a car parked in direct sunlight.
■Heavy Objects
●Never place heavy objects on top of the Data Collector. Doing so creates the
danger of loss of balance and the object falling, which can cause personal
injury.
■LCD Screen
●Never apply strong pressure to the screen or subject it to strong impact.
Doing so can crack the screen or LCD panel glass, which can cause the
danger of personal injury.
●Should the LCD panel glass break, never touch the liquid inside. Doing so
can cause skin inflammation.
• Should liquid from the LCD panel accidentally get into your mouth,
immediately wash your mouth with water and then consult a physician.
• Should liquid from the LCD panel accidentally get into your eyes or onto
your skin, immediately rinse for at least 15 minutes with clean tap water
and then consult a physician.
■Printer
●Do not touch the gears while they are turning. Doing so can cause injury.
■Battery Handling
●Misuse of batteries can cause them to leak, which damages and corrodes
the area around the battery, and creates the danger of fire and personal
injury. Be sure to observe the following precautions.
• When loading batteries, make sure that their positive (+) and negative (–)
poles are facing the correct directions.
• Use only battery types that are specified for the Data Collector.
●If you do not plan to use the Data Collector for a long time, protect against
rundown of the lithium backup battery by loading a fully charged lithium-ion
battery pack into the Data Collector. You should also load a fully charged
lithium-ion battery pack into the Data Collector before using it for the first
time following a long period of non-use.

E-8
Caution!
■Lithium-ion Battery Pack
●Never use or leave the battery pack in an area exposed to direct sunlight, in
a car parked in direct sunlight, or any other very hot area. Doing so creates
the danger of heat emission and fire, as well as deterioration of battery pack
performance and shortening of its service life.
●Do not use the battery pack in areas where static electricity is being
generated. Doing so creates the danger of battery pack heat emission,
explosion, and fire.
●Should fluid from the battery pack accidentally get onto clothing or your skin,
immediately rinse it off with clean tap water. Prolonged contact with battery
pack fluid can cause skin irritation.
●Keep the battery pack out of the reach of small children. Do not let small
children remove the battery pack from the charger unit or the Data Collector
while it is powered on.
■Backup Copies of All Important Data
●Note that CASIO Computer Co., Ltd. shall not be held liable to you or any
third party for any damages or loss caused by deletion or corruption of data
due to use of the Data Collector, malfunction or repair of the Data Collector
or its peripherals, or due to batteries going dead.
●The Data Collector employs electronic memory to store data, which means
that memory contents can be corrupted or deleted if power is interrupted due
to batteries going dead or incorrect battery replacement procedures. Data
cannot be recovered once it is lost or corrupted. Be sure to make backup
copies of all important data. One way to do this is to use the separately sold
I/O box to transfer data to a computer.
■AC Power Supply
●Keep the power cord away from stoves and other sources of extreme heat.
Heat can melt the covering of the power cord and create the danger of fire
and electric shock.
●Never pull on the power cord when unplugging it. Doing so can damage the
cord and create the danger of fire and electric shock. (Always hold onto the
plug when unplugging it from the wall outlet.)
●Never touch the plug while your hands are wet. Doing so can create the
danger of electric shock.
●Be sure to unplug the power cord from the wall outlet before moving the
Data Collector. Failure to do so can result in damage to the power cord
caused by pulling it, which creates the danger of fire and electric shock.
●Be sure to unplug the power cord from the wall outlet before cleaning the
Data Collector.
●Be sure to turn the power OFF and unplug the power cord after use.
●Unplug the power cord from the wall outlet whenever leaving the Data
Collector unattended for long periods.

E-9
GUIDELINES LAID DOWN BY FCC RULES FOR USE OF THIS
UNIT IN THE U.S.A. (not applicable to other areas).
NOTICE
This equipment has been tested and found to comply with the limits for 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 on a circuit different from that to which the
receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.
FCC WARNING
Changes or modifications not expressly approved by the party responsible for
compliance could void the user’s authority to operate the equipment.
Proper connectors must be used for connection to host computer and/or peripherals in
order to meet FCC emission limits.
Peripherals and Connectors
Declaration of Conformity
Model Number: IT-2000D33E, IT-2000D53E, IT-2060IOE and DT-825ADP-U
Trade name: CASIO COMPUTER CO., LTD.
Responsible party: CASIO MANUFACTURING CORPORATION
Address: 181 Metro Drive, Suite 400. San Jose, California 95110
Telephone number: 1-888-93-CASIO
This device complies with Part 15 of the FCC Rules. Operation is subject to the
following two conditions: (1) This device may not cause harmful interference, and (2)
this device must accept any interference received, including interference that may cause
undesired operation.
Desktop computer
Optical Communication Unit (IT-2060IOE)
Lithium ion Battery Pack (DT-9023LI)
Charger (DT-9020ADP-U)
AC adapter for Optical Communication Unit (DT-825ADP-U)
PC Card (DT-9031BFMC, DT-9033BFMC, DT-9034BFMC)
Bar-code reader (DT-9650BCR)
Connectors
(DT-883RSC, DT-882RSC, DT-887AX, DT-881RSC, DT-888RSC)

E-10
• Information in this manual is subject to change without notice.
• CASIO shall have neither liability nor responsibility to any person or entity with respect to
any loss or damages arising from the information contained in this book.
• This manual does not provide information about programming and downloading. See other
manuals coming with IT-2000 for information about these subjects.
• All efforts were made to create this manual as complete and as accurate as possible but in
case our in user find unclear explanation or errors, we would appreciate remarks and
suggestions communicated by users.
CONTENTS
Safety Precautions.................................................E-3
Introduction ..........................................................E-12
Precautions .........................................................................E-12
IT-2000 Series System Configuration.................E-14
General Guide.......................................................E-17
Installing and Removing Batteries .....................E-19
Main power supply ..............................................................E-19
Backup batteries..................................................................E-21
Position of the Keys.............................................E-23
Position of stroke keys ........................................................E-23
Touch key panel ..................................................................E-24
System Initialization Routine ..............................E-25
Charging the Battery Pack ..................................E-26
To charge the battery pack ..................................................E-26
To charge battery packs using the Charger.........................E-27
Attaching the Neck Strap ....................................E-28
Data Communication ...........................................E-29
Exchanging Data Between Two Data Collectors.................E-29
Exchanging Data with a Personal Computer.......................E-29
Handling the Printer.............................................E-30
Using Roll Paper .................................................................E-30
Using Paper Tape .................................................................E34

E-11
IT-2000’s Specifications.......................................E-37
IT-2060IOE Optional Optical
Communication Unit .......................................E-38
General Guide .....................................................................E-38
Connecting the Optical Communication Unit
to a Power Source .........................................................E-40
Daisy Chaining Optical Communication Units .....................E-42
DIP Switch Settings .............................................................E-43
IT-2060IOE Optical Communication Unit Specifications .....E-44
Handling Bar-Code Reader .................................E-45
Connecting the bar-code reader..........................................E-45
Detaching bar-code reader..................................................E-45
Using a bar-code reader......................................................E-45
Bar-Code Reader Specifications .........................................E-49
Using PC Cards ....................................................E-50
To load a memory card into the Data Collector ...................E-50
To remove a card from the Data Collector...........................E-51
Attaching the Screen Protective Cover..............E-52
Drip-Proof Cover ..................................................E-53
Operating Precautions.........................................E-54
Notice ....................................................................E-55
CASIO ELECTRONICS CO., LTD.
Unit 6, 1000 North Circular Road
London NW2 7JD, U.K.

E-12
Introduction
In order to maintain and use the Data Collector, keep in mind these precautions.
Precautions
•This product is made of precision parts so do
not try to disassemble by yourself.
•Do not expose the Data Collector to excessive
heat or cold. Do not place it direct sunlight,
dusty or extremely humid areas. The utilization
of the power supply in moisture places is
forbidden. Do not leave the Data Collector on
hot places, such as car trunk or seats.
•Do not expose it to mechanical shocks,
especially during running programs, recording
or booting up because it can cause permanent
loss of data and damage to the LCD.
•Stroke keys must be pressed with care.
Use only the special touch panel pen for
working with the touch panel.
Do not apply excessive force or use sharp
objects for this purpose because in that way
you can damage the touch panel or internal
circuitry.

E-13
•Blow off dust with a blower brush or a soft
cloth.
No utilization of liquid- or spray-cleansing
agents is allowed. It may deform the keys or
the body of the Data Collector. The Data
Collector must not come in contact with
chemicals and gasoline.
•Do not place heavy objects on the Data
Collector.
Important! CASIO does not accept any responsibility for possible data loss caused
during, or connected with, usage of the Data Collector.

E-14
IT-2000 Series System Configuration
• Backup Lithium Battery
• Paper roll
Accessories
• Lithium ion Battery
Pack
• Paper holder
• Neck Strap
• Stylus
Placed to the right side of
the Data Collector
• Manual
0123
456
7Fn 8 9
CLR

E-15
Bar-code reader
DT-9650BCR
DT-9656BCR
Cable
DT-9689AX
(between Data Collector
and personal computer)
DT-881RSC
(modem-used)
DT-882RSC
(cross connection, male)
DT-883RSC
(cross connection, female)
DT-887AX
(AX-used, cross connection)
DT-888RSC
(Optical Communication
Unit-used)
Charger
DT-9021CHGEU
DT-9020ADP-G
DT-9020ADP-U
Lithium ion Battery Pack
DT-9023LI
Options
Optical
Communication Unit
IT-2060IOE
AC adaptor for Optical
Communication Unit
DT-825ADP-G
DT-825ADP-U
PC Cards
DT-9031BFMC
(FROM 4MB)
DT-9033BFMC
(FROM 10MB)
DT-9034BFMC
(FROM 20MB)

E-16
Bar-code reader
DT-9650BCR
Cable
DT-881RSC
(modem-used)
DT-882RSC
(cross connection, male)
DT-883RSC
(cross connection, female)
DT-887AX
(AX-used, cross connection)
DT-888RSC
(Optical Communication
Unit-used)
Charger
DT-9021CHGEU
DT-9020ADP-U
Lithium ion Battery Pack
DT-9023LI
Available Options for the IT-2000 Series American Market Models
Optical
Communication Unit
IT-2060IOE
AC adaptor for Optical
Communication Unit
DT-825ADP-U
PC Cards
DT-9031BFMC
(FROM 4MB)
DT-9033BFMC
(FROM 10MB)
DT-9034BFMC
(FROM 20MB)
IT-2000 Series System Configuration

E-17
For connection of the charger to charge the lithium ion battery pack.
Protected by a cover that must be opened for connection.
Stays lit while the lithium-ion battery pack is being charged, and goes
out after charging is complete. Lights momentarily when the charger
is connected even when the battery pack is charged.
Cuts the printed paper roll.
Remove this cover to remove paper when a paper jam occurs.
Emits audible signals to confirm certain operations. Make sure that
buzzer holes are not blocked so that signals can be heard.
Detects available light. This sensor switches the backlight on (when
dark) and off (when bright). For proper operation, make sure that this
sensor is not blocked.
Display data during program execution or debugging. Also provides
touch panel keys for input by touching the screen with a finger or the
stylus pen that comes with the Data Collector.
15 keys including 10-key pad and execute key.
Used when installing roll paper or feeding paper manually.
Press to turn power on and off, or to restore power after auto power
off operation.
Lift this lever up when installing or replacing a paper roll.
For connection of a bar code reader or other external device.
Protected by a cover that must be opened for connection.
For touch panel operations.
Communication port for data exchange between two Data Collectors
or with the I/O box.
1 Lithium ion battery
pack charger connector
2 Charge indicator
3 Paper cutter
4 Printer cover
5 Buzzer
6 Light sensor
7 LCD/Touch panel
8 Key pad
9 Feeding dial
10 Power switch
11 Head-up lever
12 RS-232C interface
connector
13 Stylus pen
14 Infrared interface
General Guide
Left Front Right
0
1
2
123
456
7Fn 8 9
CLR
6
510
9
14
13
8
7
3
412
11

E-18
Top Back
Bottom
Locks optional PC card in place.
Make sure that this button is in the LOCK position when using a PC
card.
Press this button (after opening the PC card slot cover and setting the
PC card lock button to FREE) to eject a PC card installed in the Data
Collector.
Insert the optional PC card here when installing.
Open when inserting a PC card.
For connection of the neck strap.
These terminals mate with the I/O box to receive electrical power for
charging the lithium-ion battery pack.
Houses the lithium-ion battery used for memory backup.
Slide to open the battery pack cover.
Houses the lithium-ion battery pack that is the Data Collector’s main
power supply.
Use a paper clip or other thin, pointed object to press this button to
launch the Data Collector’s system initialization routine.
For connection of future expansion options.
15 PC card lock button
(inside PC card slot
cover)
16 PC card eject button
(inside PC card slot
cover)
17 PC card slot cover
18 Neck strap bars
19 Charger terminals
20 Backup battery
compartment
21 Open button
22 Lithium-ion battery
pack compartment
connector
23 Initialize button
24 14-pin serial interface
connector
Note! Pressing the Initialize button clears all data and programs from memory.
Never press the Initialize switch unless absolutely necessary.
17 24
21
20
23
18
22
15 16
19
General Guide

E-19
Your Data Collector is powered by a rechargeable lithium ion battery pack and a lithium
backup battery.
Main power supply
See page E-26 for details on how to recharge the battery pack.
To install the battery pack
1Slide the battery pack compartment open
button in the direction indicated by the arrow
in the illustration, and open the cover.
2With the indentation of
the battery pack facing
up (so you can see it),
install the battery pack
into the compartment as
shown in the illustration.
Make sure that the
battery pack’s terminals
are facing in the correct
direction. Next, slide the
battery pack in the
direction shown in the
illustration so that it
locks into place.
3Close the battery pack compartment cover.
Close the cover and then slide the open
button in the direction indicated by the arrow
to secure the cover in place.
Note that the battery pack will not supply
power correctly unless the battery pack
compartment cover is closed securely.
Double check to make sure that the cover of
your unit is closed correctly.
Installing and Removing Batteries
Open button

E-20
Installing and Removing Batteries
To remove the battery pack
Always make sure that Data Collector power is turned off before removing the battery pack.
Also, never remove the backup batteries while the battery pack is removed. Doing so will
cause all memory contents to be deleted.
1Slide the battery pack compartment open
button in the direction indicated by the arrow
in the illustration, and open the cover.
2Slide the battery pack in the direction shown
in the illustration and then remove it.
Important! •The power of the battery pack is depleted by testing prior to shipment
and by natural discharging during shipping and storage. Be sure to
use the procedures on page E-26 to charge the battery pack before
using the unit for the first time.
•Charge the battery pack as soon as possible when the buzzer sounds
intermittently to notify you that battery power has dropped.
•Always make sure that the Data Collector is turned off before opening
the lithium ion battery pack compartment cover. When the battery pack
compartment cover is opened, an alarm tone sounds. This is to
prevent the battery pack from being removed while the power is ON.
This can cause loss of memory data and system malfunction when
power is turned back on.
•Make sure that the battery pack never becomes shorted. A short can
cause damage to the battery pack.
•Repeated charges cause deterioration of the battery pack. If you find
that your battery pack does not provide enough operation even after
you bring it to a full charge, it probably means it is time to replace it.
•If you do not plan to use the Data Collector for a long time, protect
against running down the power of the backup batteries by fully
charging the battery pack.
Open button

E-21
Backup batteries
The backup batteries protect the units memory contents whenever power from the main
battery pack is interrupted due to replacement of the battery pack, when the battery pack is
dead, etc.
Two lithium batteries are used for backup. The #2 backup battery is installed in the Data
Collector prior to shipment, but you must install the #1 backup battery that comes with the
Data Collector before using it for the first time.
Important! Dual backup batteries are employed in order to protect the #1 backup
battery from going dead. Note that memory contents cannot be
protected by the #2 backup battery alone.
To install the #1 backup battery
1Loosen the screw that secures the backup
battery compartment cover in place. The
cover is designed so the screws cannot be
removed from the holes in order to protect
against particles falling out of the screw
threads into the battery compartment.
2Lift up the side of the cover indicated in the
illustration, and then slide the cover in the
direction indicated by the arrow. Make sure
you do not damage the tab on end of the
cover.
3Loosen the screw that holds the #1 backup
battery holder in place, and remove the
holder. The cover is designed so the screws
cannot be removed from the holes in order to
protect against particles falling out of the
screw threads into the battery compartment.
#2 backup battery
#1 backup battery