Panasonic KX-FC971CX-S User manual

©2005 Panasonic Communications Co., Ltd. All
rights reserved. Unauthorized copying and
distribution is a violation of law.
KX-FC971CX-S
KX-FGA521CX-S
Silver Version
(for Asia and Middle Near East)
Thermal FAX with Digital Cordless Phone
IMPORTANT INFORMATION ABOUT LEAD FREE, (PbF), SOLDERING
If lead free solder was used in the manufacture of this product the printed circuit boards will be marked PbF.
Standard leaded, (Pb), solder can be used as usual on boards without the PbF mark.
When this mark does appear please read and follow the special instructions described in this manual on the use of PbF and how
it might be permissible to use Pb solder during service and repair work.
ORDER NO.KMF0510907CE

1 INTRODUCTION 4
1.1. ABOUT LEAD FREE SOLDER (PbF: Pb free) 4
1.2. HOW TO RECOGNISE THAT Pb FREE SOLDER IS
USED 5
1.3. SAFETY PRECAUTIONS 6
1.4. INSULATION RESISTANCE TEST 6
1.5. FOR SERVICE TECHNICIANS 6
1.6. BATTERY CAUTION 6
1.7. AC CAUTION 7
1.8. PERSONAL SAFETY PRECAUTIONS 7
1.9. SERVICE PRECAUTIONS 8
2 FEATURES AND SPECIFICATIONS 9
2.1. FEATURES 9
2.2. OPTIONAL ACCESSORIES 9
2.3. SPECIFICATIONS 10
3 LOCATION 12
3.1. Overview 12
3.2. Control Panel 13
4 INSTALLATION 15
4.1. INSTALLATION SPACE 15
4.2. CONNECTIONS 16
4.3. BATTERY CHARGE 17
4.4. RECORDING PAPER 18
4.5. DOCUMENTS THE UNIT CAN SEND 19
4.6. INSTALLLING THE BATTERY 20
4.7. REPLACING THE BATTERY 20
4.8. SETTING YOUR LOGO 21
5 MAINTENANCE 23
5.1. MAINTENANCE ITEMS AND COMPONENT LOCATIONS
23
5.2. JAMS 25
6 DISASSEMBLY INSTRUCTIONS 27
6.1. DISASSEMBLY FLOW CHART 27
6.2. BASE UNIT 29
6.3. CORDLESS HANDSET 40
7 TROUBLESHOOTING GUIDE 44
7.1. TROUBLESHOOTING SUMMARY 44
7.2. USER RECOVERABLE ERRORS 45
7.3. PROGRAMMING AND LISTS 47
7.4. TEST FUNCTIONS 50
7.5. REMOTE PROGRAMMING 52
7.6. THE EXAMPLE OF THE PRINTED LIST 55
7.7. TROUBLESHOOTING DETAILS 59
7.8. DIGITAL BOARD (CORDLESS BASE SECTION)
ADJUSTMENT 112
7.9. CORDLESS HANDSET ADJUSTMENT 117
7.10. CHECK (Charger Unit) 123
7.11. RF SPECIFICATION 124
7.12. HOW TO CHECK THE CORDLESS HANDSET AND
BASE UNIT SPEAKER 124
7.13. HOW TO CHECK THE CORDLESS HANDSET
RECEIVER 125
8 CIRCUIT OPERATIONS 126
8.1. CONNECTION DIAGRAM 126
8.2. GENERAL BLOCK DIAGRAM 127
8.3. CONTROL (Facsimile) SECTION 130
8.4. FACSIMILE SECTION 136
8.5. SENSORS AND SWITCHES 149
8.6. MODEM SECTION 153
8.7. NCU SECTION 160
8.8. Transmitter/Receiver (Cordless) 163
8.9. OPERATION BOARD SECTION 164
8.10. LCD SECTION 165
8.11. POWER SUPPLY BOARD SECTION 166
8.12. CORDLESS SECTION (BASE UNIT) 169
8.13. CORDLESS HANDSET 171
8.14. CPU DATA (BASE UNIT) 173
8.15. CPU DATA (CORDLESS HANDSET) 175
9 REFERENCE MATERIAL DATA 177
9.1. TERMINAL GUIDE OF THE ICs TRANSISTORS AND
DIODES 177
9.2. HOW TO REPLACE THE FLAT PACKAGE IC 179
9.3. TEST CHART 181
10 FIXTURES AND TOOLS 183
11 CABINET, MECHANICAL AND ELECTRICAL PARTS
LOCATION 184
11.1. OPERATION PANEL SECTION 184
11.2. UPPER CABINET SECTION 185
11.3. LOWER CABINET SECTION 186
11.4. MOTOR SECTION 187
11.5. CORDLESS HANDSET SECTION 188
11.6. CHARGER UNIT SECTION 189
11.7. ACTUAL SIZE OF SCREWS 190
12 ACCESSORIES AND PACKING MATERIALS 191
13 ACCESSORIES AND PACKING MATERIALS 192
13.1. KX-FGA521CX 192
14 REPLACEMENT PARTS LIST 193
14.1. CABINET AND ELECTRICAL PARTS 193
14.2. DIGITAL BOARD PARTS 194
14.3. ANALOG BOARD PARTS 197
14.4. OPERATION BOARD PARTS 198
14.5. CORDLESS HANDSET 199
14.6. CHARGER UNIT 200
14.7. POWER SUPPLY BOARD PARTS 201
14.8. FIXTURES AND TOOLS 201
15 PRINTED CIRCUIT BOARD 202
15.1. DIGITAL BOARD 202
15.2. ANALOGUE BOARD 204
15.3. OPERATION BOARD 206
15.4. POWER SUPPLY BOARD 207
15.5. CHARGER UNIT BOARD 208
CONTENTS
Page Page
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KX-FC971CX-S / KX-FGA521CX-S

15.6. CORDLESS HANDSET BOARD 209
16 FOR THE SCHEMATIC DIAGRAMS 210
17 SCHEMATIC DIAGRAM 211
17.1. ANALOG BOARD 211
17.2. DIGITAL BOARD 213
17.3. OPERATION BOARD 216
17.4. POWER SUPPLY BOARD 217
17.5. CORDLESS HANDSET BOARD 218
17.6. CHARGER UNIT BOARD 220
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KX-FC971CX-S / KX-FGA521CX-S

1 INTRODUCTION
1.1. ABOUT LEAD FREE SOLDER (PbF: Pb free)
Note:
In the information below, Pb, the symbol for lead in the periodic table of elements, will refer to standard solder or solder that
contains lead.
We will use PbF solder when discussing the lead free solder used in our manufacturing process which is made from Tin, (Sn),
Silver, (Ag), and Copper, (Cu).
This model, and others like it, manufactured using lead free solder will have PbF stamped on the PCB. For service and repair
work we suggest using the same type of solder although, with some precautions, standard Pb solder can also be used.
Caution
· PbF solder has a melting point that is 50° ~ 70° F, (30° ~ 40°C) higher than Pb solder. Please use a soldering iron with
temperature control and adjust it to 700° ± 20° F, (370° ± 10°C). In case of using high temperature soldering iron, please
be careful not to heat too long.
· PbF solder will tend to splash if it is heated much higher than its melting point, approximately 1100°F, (600°C).
· If you must use Pb solder on a PCB manufactured using PbF solder, remove as much of the original PbF solder as possible
and be sure that any remaining is melted prior to applying the Pb solder.
· When applying PbF solder to double layered boards, please check the component side for excess which may flow onto the
opposite side (See figure, below).
1.1.1. SUGGESTED PBF SOLDER
There are several types of PbF solder available commercially. While this product is manufactured using Tin, Silver, and Copper,
(Sn+Ag+Cu), you can also use Tin and Copper, (Sn+Cu), or Tin, Zinc, and Bismuth, (Sn+Zn+Bi). Please check the manufac-
turer’s specific instructions for the melting points of their products and any precautions for using their product with other
materials.
The following lead free (PbF) solder wire sizes are recommended for service of this product: 0.3mm, 0.6mm and 1.0mm.
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KX-FC971CX-S / KX-FGA521CX-S

1.2. HOW TO RECOGNISE THAT Pb FREE SOLDER IS USED
P.C.Boards marked as “PbF” use Pb Free solder. (See the figure below.)
(Example :Digital board)
Note : The “PbF” marked may be found on different areas of the same P.C.Board,depending on manufacture date.
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KX-FC971CX-S / KX-FGA521CX-S

1.3. SAFETY PRECAUTIONS
1.Before servicing, unplug the AC power cord to prevent an electric shock.
2.When replacing parts, use only the manufacturer´s recommended components.
3.Check the condition of the power cord. Replace if wear or damage is evident.
4.After servicing, be sure to restore the lead dress, insulation barriers, insulation papers, shields, etc.
5.Before returning the serviced equipment to the customer, be sure to perform the following insulation resistance test to prevent
the customer from being exposed to shock hazards.
1.4. INSULATION RESISTANCE TEST
1.Unplug the power cord and short the two prongs of the plug with a jumper wire.
2.Turn on the power switch.
3.Measure the resistance value with an ohmmeter between the jumpered AC plug and each exposed metal cabinet part
(screw heads, control shafts, bottom frame, etc.).
Note: Some exposed parts may be isolated from the chassis by design. These will read infinity.
4.If the measurement is outside the specified limits, there is a possibility of a shock hazard.
1.5. FOR SERVICE TECHNICIANS
ICs and LSIs are vulnerable to static electricity.
When repairing, the following precautions will help prevent recurring malfunctions.
1.Cover the plastic part’s boxes with aluminum foil.
2.Ground the soldering irons.
3.Use a conductive mat on the worktable.
4.Do not touch the IC or LSI pins with bare fingers.
1.6. BATTERY CAUTION
CAUTION
Danger of explosion if the battery is incorrectly replaced. Replace only with the same or equivalent type recommended by the
manufacturer. Dispose of used batteries according to the manufacturer’s Instructions.
The lithium battery is a critical component (type No. CR2032). Please observe for the proper polarity and the exact location
when replacing it and the exact location when replacing it and soldering the replacement lithium battery in.
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KX-FC971CX-S / KX-FGA521CX-S

1.7. AC CAUTION
For safety, before closing the lower cabinet, please make sure of the following precautions.
1.The earth lead is fixed with the screw.
2.Wrap the earth lead around the core 5 times.
3.Wrap the AC lead around the core 5 times.
1.8. PERSONAL SAFETY PRECAUTIONS
1.8.1. MOVING SECTIONS OF THE UNIT
Be careful not to let your hair, clothes, fingers, accessories, etc., become caught in any moving sections of the unit.
The moving sections of the unit are the rollers and a gear. There is a separation roller and a document feed roller which are
rotated by the document feed motor. A gear rotates the two rollers. Be careful not to touch them with your hands, especially
when the unit is operating.
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KX-FC971CX-S / KX-FGA521CX-S

1.8.2. LIVE ELECTRICAL SECTIONS
All the electrical sections of the unit supplied with AC power by the AC power cord are live.
Never disassemble the unit for service with the AC power supply plugged in.
CAUTION:
AC voltage is supplied to the primary side of the power supply unit. Therefore, always unplug the AC power cord before
disassembling for service.
1.9. SERVICE PRECAUTIONS
1.9.1. PRECAUTIONS TO PREVENT DAMAGE FROM STATIC ELECTRICITY
Electrical charges accumulate on a person. For instance, clothes rubbing together can damage electric elements or change
their electrical characteristics. In order to prevent static electricity, touch a metallic part that is grounded to release the static
electricity. Never touch the electrical sections such as the power supply unit, etc.
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KX-FC971CX-S / KX-FGA521CX-S

General
· LCD (Liquid Crystal Display) readout
Facsimile
· Automatic document feeder (10 sheets)
· Resolution: Standard/Fine/Photo/Super Fine (64 level)
· Broad cast
Integrated Telephone System
· Redialing function
· Base unit phonebook function (100 names)
· Cordless handset phonebook function (150 names)
· Caller ID compatible**
**Feature requires a subscription to caller identification
services offered by certain local telephone companies
for a tee. You and your caller(s) must be in areas that
provide caller identification services, and compatible
equipment must be used by both telephone companies.
Feature not available when the unit is connected to a
PBX system.
Enhanced Copier Function
· 64-Level halftone
2 FEATURES AND SPECIFICATIONS
2.1. FEATURES
2.2. OPTIONAL ACCESSORIES
Model No. Item Specifications/Usage
KX-A106 Standard thermal recording
paper*1216 mm × 30 m roll, with 25 mm core
HHR-P106 Rechargeable battery Nickel metal hydride (Ni-MH) battery
KX-FGA521CX Additional cordless
handset English LCD display
*1Use only the included or specified recording paper. Using other recording paper may affect print quality and/or
cause excessive wear to the thermal head.
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KX-FC971CX-S / KX-FGA521CX-S

2.3. SPECIFICATIONS
2.3.1. Base unit
Applicable Lines: Public Switched Telephone Network
Document Size: Max. 216 mm in width
Max. 600 mm in length
Effective Scanning Width: 208 mm
Recording Paper Size: 216 × max. 30 m roll
Effective Printing Width: 208 mm
Transmission Time*1:Approx. 15 s/page (Original mode)*2
Scanning Density: Horizontal: 8 pels/mm
Vertical:
3.85 lines/mm - in standard resolution,
7.7 lines/mm - in fine/photo resolution,
15.4 lines/mm - in super fine resolution
Photo resolution: 64-level
Scanner Type: Contact Image Sensor
Printer Type: Thermal printing
Data Compression System: Modified Huffman (MH), Modified READ (MR)
Modem Speed: 9,600 / 7,200 / 4,800 / 2,400 bps; Automatic Fallback
Operating Environment: 5 - 35°C, 20 - 80% RH (Relative Humidity)
Dimensions (H×W×D): Approx. height 121 mm × width 364 mm × depth 224 mm
Mass (Weight): Approx. 2.8 kg
Power Consumption: Standby: Approx. 2.0 W
Transmission: Approx. 13 W
Reception: Approx. 30 W (When receiving a 20% black document)
Copy: Approx. 35 W (When copying a 20% black document)
Maximum: Approx. 110 W (When copying a 100% black document)
Power Supply: 220 V - 240 V AC, 50/60 Hz
Fax Memory Capacity*3:Approx. 28 pages memory reception
(Based on the ITU-T No. 1 Test Chart in standard resolution, with original mode.)
Voice Memory Capacity*4:Approx. 15 minutes of recording time
*1Transmission speed depends upon the contents of the pages, resolution, telephone line conditions and capability of the other
party’s machine.
*2Transmission speed is based upon the ITU-T No. 1 Test Chart with original mode. If the capability of the other party’s machine
is inferior to your unit, the transmission time may be longer.
*3If an error occurs during fax reception, such as a paper jam or if the recording paper runs out, the fax and subsequent faxes will
be retained in memory.
*4Recording time may be reduced by the calling party’s background noise.
2.3.2. Cordless handset
Frequency range: 2,402 MHz~2,480 MHz
Operating environment: 5 - 35°C, 20 - 80% RH (Relative Humidity)
Duplex procedure: FHSS
RF Transmission Power: EIRP<. 25 mW
Voice coding: ADPCM 32 kbit/s
Dimensions: Approx. height 161 mm × width 47 mm × depth 39 mm
Mass (Weight): Approx. 140 g
2.3.3. Charger unit
Operating environment: 5 - 35°C, 20 - 80% RH (Relative Humidity)
Dimensions: Approx. height 64 mm × width 80 mm × depth 90 mm
Mass (Weight): Approx. 80 g
Power consumption: Standby: Approx. 1 W
Maximum: Approx. 2 W
Power supply: AC adaptor (220V-240V AC, 50/60 Hz)
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KX-FC971CX-S / KX-FGA521CX-S

Note:
· Design and specifications are subject to change without notice.
· The pictures and illustrations in these instructions may vary slightly from the actual product.
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KX-FC971CX-S / KX-FGA521CX-S

(1) Speaker
(2) Document guides
(3) Paper stacker
· The paper stacker may not be shown in all
illustrations in these operating instructions.
(4) Document feeder tray
(5) Antenna
(6) Top cover
(7) Document exit
(8) Document entrance
(9) Top cover release button
(1) Speaker
(2) Antenna
(3) Charge contacts
(4) Battery cover
(5) Voice select button
· To select the tone quality of the receiver .
3 LOCATION
3.1. Overview
3.1.1. Base Unit
3.1.2. Cordless Handset
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KX-FC971CX-S / KX-FGA521CX-S

(1) [CALLER ID]
· To use Caller ID features.
(2) [STOP]
· To stop an operation or programming session.
· To erase a character/number. Press and hold to erase
all characters/numbers.
(3) [FLASH]
· To access special telephone services or for transferring
extension calls.
(4) [REDIAL]
· To redial the last number dialed from the base unit.
(5) [BROADCAST]
· To transmit a document to multiple parties.
(6) [RECORD]
· To record a telephone conversation.
(7) [ERASE]
· To erase messages.
(8) [PLAY MESSAGES]
· To play messages.
(9) [AUTO ANSWER]
· To turn the auto answer setting ON/OFF.
(10) Station keys
· To use one-touch dial feature.
(11) [FAX/START]
· To start sending or receiving a fax.
(12) [COPY]
· To copy a document.
(13) [TONE]
· To change from pulse to tone temporarily during dialing
when your line has rotary pulse services.
(14) [PAUSE]
· To insert a pause during dialing.
(15) [MONITOR]
· To initiate dialing without lifting the handset.
(16) [INTERCOM]
· To page or locate the handset.
(17) Navigator/ [VOLUME][PHONEBOOK]
· To adjust volume.
· To search for a stored item.
· To select features or feature settings during
programming.
· To navigate to the next operation.
· To open a phonebook.
(18) [SET]
· To store a setting during programming.
(19) [MENU]
· To initiate or exit programming.
(20) [LOWER]
· To select stations 6-10 for the one-touch dial feature.
3.2. Control Panel
3.2.1. Base Unit
Buttons
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KX-FC971CX-S / KX-FGA521CX-S

(1) [MENU/SET]
· To initiate programming.
· To store a setting during programming.
(2) [TALK]
· To make/answer calls.
(3) Navigator key/[VOL][REDIAL][PHONEBOOK]
· To search for a stored item.
· To select features or feature settings during
programming.
· To adjust volume.
· To redial the last number dialed from the handset.
· To open a phonebook.
(4) [CALLER ID]
· To use Caller ID features.
(5) [TONE]
· To change from pulse to tone temporarily during dialing
when your line has rotary pulse services.
(6) [FLASH/CLEAR]
· To access special telephone services or for transferring
extension calls.
· To erase a character/number.
Press and hold to erase all characters/numbers.
(7) Microphone
· The built-in microphone.
(8) [AUTO ANSWER/EDIT]
· To turn the auto answer setting ON/OFF.
· To edit the caller’s phone number.
(9) [OFF]
· To stop an operation or programming session.
· To hang up.
· To stop viewing caller information.
(10) [INTERCOM]
· To page or locate the base unit or another cordless
handset.
(11) [ ON]
· To turn ON the AUTO ANSWER mode .
(12) [ OFF]
· To turn OFF the AUTO ANSWER mode .
(13) [MUTE]
· To mute your voice to the other party during a
conversation. Press again to resume the conversation.
(14) [SP-PHONE]
· For speakerphone operation.
3.2.2. Cordless Handset
Buttons
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KX-FC971CX-S / KX-FGA521CX-S

4 INSTALLATION
4.1. INSTALLATION SPACE
The space required to install the unit is shown below.
The dimensions given are necessary for the unit to operate efficiently.
Note:
· Avoid excessive heat or humidity.
· Use the unit within the following ranges of temperature and humidity.
· Ambient temperature: 5°C to 35°C
· Relative humidity: 20% to 80% (without condensation)
· Power cord length should be less than 5 meters. Using a longer cord may reduce the voltage or cause malfunctions.
· Avoid direct sunlight.
· Do not install near devices which contain magnets or generate magnetic fields.
· Do not subject the unit to strong physical shock or vibration.
· Keep the unit clean. Dust accumulation can prevent the unit from functioning properly.
· To protect the unit from damage, hold both sides when you move it.
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KX-FC971CX-S / KX-FGA521CX-S

4.2. CONNECTIONS
Important:
· The unit will not function when there is a power
failure. To make calls in emergency situations, you
should connect a telephone that can function during
a power failure to the telephone line.
4.2.1. Base unit
(1) Paper stacker
· The paper stacker will drop to a lower angle after inserting
into the base unit.
· The paper stacker may not be shown in all illustrations in
these operating instructions.
(2) Power cord
· Connect to the power outlet (220 V - 240V, 50/60 Hz).
(3) Telephone line cord
· Connect to [LINE] jack and a single telephone line jack.
(4) [EXT] jack
· Remove the stopper if attached.
(5) Handset cord
(6) Extension telephone (not included)
Caution:
· When you operate this product, the power outlet
should be near the product and easily accessible.
· Be sure to use the telephone line cord included in
this unit.
· Do not extend the telephone line cord.
· Keep the base unit away from walls as far as
possible to prevent a recording paper jam .
Note:
· Before you can make calls, the dialing mode setting
may need to be changed.
4.2.2. Charger Unit
(1) Hooks
· Fasten the AC adaptor cord to prevent it from being
disconnected.
(2) AC adaptor
· Connect to the power outlet (220 V - 240 V, 50/60 Hz).
CAUTION:
· USE ONLY WITH the included Panasonic AC
adaptor.
· The AC adaptor must remain connected at all times.
(It is normal for the adaptor to feel warm during
use.)
· The AC adaptor should be connected to a vertically
oriented or floor-mounted AC outlet. Do not connect
the AC adaptor to a ceiling-mounted AC outlet, as
the weight of the adaptor may cause it to become
disconnected.
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KX-FC971CX-S / KX-FGA521CX-S

4.3. BATTERY CHARGE
Place the cordless handset on the charger for about 10
hours before initial use. Make sure the base unit power
cord is connected while charging the battery.
Note:
· Clean the cordless handset charge contacts (1) and the
charger charge contacts (2) with a soft, dry cloth once a
month, otherwise the battery may not charge properly.
Clean more often if the unit is exposed to grease, dust
or high humidity.
· While charging the battery, make sure the cordless
handset and charger are within range of the base unit
(where intercom call is available).
Battery strength
You can confirm the battery strength on the cordless
handset display.
Note:
· The cordless handset will not operate while it is on the
charger.
Battery life
After your Panasonic battery is fully charged, you can
expect the following performance:
Operation Operating Time
While in use (talking) 7 hours approx.
While not in use (standby) 150 hours approx.
· Times indicated are for peak performance.
· Battery operating time may be shortened depending on
usage conditions and ambient temperature.
· Battery power is consumed whenever the cordless handset
is off the charger, even when the cordless handset is not in
use. The longer you leave the cordless handset off the
charger, the less time you can actually talk on the cordless
handset.
· The battery cannot be overcharged unless it is repeatedly
removed and replaced.
· For maximum battery life, it is recommended that the
cordless handset is not recharged until “Recharge” is
displayed.
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KX-FC971CX-S / KX-FGA521CX-S

4.4. RECORDING PAPER
1.Open the top cover by pressing the top cover release button
(1).
2.Install the recording paper.
3.Insert the leading edge of the paper into the opening above
the thermal head (1).
4.Pull the paper out of the unit.
· Make sure that there is no slack in the paper roll.
5.Close the top cover securely by pushing down on both
sides.
6.Press [FAX/START] to cut the paper.
Note:
· If the paper is secured with glue or tape, cut
approximately 15 cm from the beginning of the roll
before installing it.
· When the power cord is connected, a message is
printed each time the top cover is opened then
closed. If the recording paper is installed upside
down, the message will not be printed. Install the
paper correctly.
· For accessory information, see OPTIONAL
ACCESSORIES (P.9).
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KX-FC971CX-S / KX-FGA521CX-S

4.5. DOCUMENTS THE UNIT CAN SEND
Note:
· Remove clips, staples or other fasteners.
· Do not send documents that are on the following types of paper: (Make a copy of the document and send the copy.)
— Chemically treated paper such as carbon or carbonless duplicating paper
— Electrostatically charged paper
— Badly curled, creased or torn paper
— Paper with a coated surface
— Paper with a faint image
— Paper with printing on the opposite side that can be seen through the other side, such as newsprint.
· Check that ink, paste or correction fluid has dried completely.
· To send a document with a width of less than 210 mm, we recommend using a copy machine to copy the original document
onto A4 or letter-sized paper, then sending the copied document.
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KX-FC971CX-S / KX-FGA521CX-S

4.6. INSTALLLING THE BATTERY
1.Insert the battery, then plug the connector.
Black lead
Red lead
Connector
2.Close the battery cover.
4.7. REPLACING THE BATTERY
If “Recharge” is displayed even when the battery has been
fully charged, the battery must be replaced. Please use
only Panasonic battery.SeeOPTIONAL ACCESSORIES
(P.9).
Important:
· Charge the new battery for about 10 hours before
initial use.
· Use only a rechargeable battery. If you install a non-
rechargeable battery and start charging, the battery
may leak electrolyte.
1.Press the notch on the cover firmly and slide it in the
direction of the arrow.
2.Unplug the connector, then remove the old battery.
3.Install the new battery. See the battery installation
procedure.
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KX-FC971CX-S / KX-FGA521CX-S