Panasonic KX-FT902LS-B User manual

©2004 Panasonic Communications Co., Ltd. All
rights reserved. Unauthorized copying and
distribution is a violation of law.
KX-FT902LS-B
KX-FT904LS-B
(Black Version)
(for Latin America)
Personal Facsimile
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. KMF0408803C3

1 INTRODUCTION 3
1.1. TRANSLATION LISTS 3
1.2. ABOUT LEAD FREE SOLDER (PbF: Pb free) 5
1.3. SAFETY PRECAUTIONS 7
1.4. INSULATION RESISTANCE TEST 7
1.5. FOR SERVICE TECHNICIANS 7
1.6. BATTERY CAUTION 7
1.7. AC CAUTION 8
1.8. PERSONAL SAFETY PRECAUTIONS 8
1.9. SERVICE PRECAUTIONS 9
2 FEATURES AND SPECIFICATIONS 10
2.1. FEATURES 10
2.2. OPTIONAL ACCESSORIES 10
2.3. SPECIFICATIONS 11
3 INSTALLATION 12
3.1. LOCATION OF CONTROLS 12
3.2. CONNECTIONS 14
3.3. INSTALLATION 15
4 MAINTENANCE 20
4.1. MAINTENANCE ITEMS AND COMPONENT LOCATIONS
20
4.2. JAMS 22
4.3. CLEANING 23
5 DISASSEMBLY INSTRUCTIONS 25
5.1. DISASSEMBLY FLOW CHART 25
6 DISASSEMBLY INSTRUCTIONS 27
6.1. HOW TO REMOVE THE PAPER STACKER (KX-
FT904LS-B ONLY) 27
6.2. HOW TO REMOVE THE OPERATION PANEL BLOCK
28
6.3. HOW TO REMOVE THE OPERATION BOARD AND LCD
29
6.4. HOW TO REMOVE THE IMAGE SENSOR 30
6.5. HOW TO REMOVE THE THERMAL HEAD AND CUTTER
UNIT 31
6.6. HOW TO REMOVE THE DOCUMENT TRAY 32
6.7. HOW TO REMOVE THE BOTTOM FRAME 33
6.8. HOW TO REMOVE THE HANDSET CRADLE CABINET
AND SPEAKER 34
6.9. HOW TO REMOVE THE DIGITAL, ANALOG AND
POWER SUPPLY BOARD AND AC INLET 35
6.10. HOW TO REMOVE THE ROLLERS 36
6.11. HOW TO REMOVE THE MOTOR BLOCK 37
6.12. INSTALLATION POSITION OF THE LEAD WIRES 40
6.13. INSTALLATION OF THERMAL HEAD 41
7 TROUBLESHOOTING GUIDE 42
7.1. TROUBLESHOOTING SUMMARY 42
7.2. USER RECOVERABLE ERRORS 43
7.3. PROGRAMMING AND LISTS 44
7.4. TEST FUNCTIONS 47
7.5. TROUBLESHOOTING DETAILS 56
8 CIRCUIT OPERATIONS 106
8.1. CONNECTION DIAGRAM 106
8.2. GENERAL BLOCK DIAGRAM 107
8.3. CONTROL SECTION 109
8.4. FACSIMILE SECTION 116
8.5. SENSORS AND SWITCHES 126
8.6. MODEM SECTION 130
8.7. ANALOG UNIT BLOCK DIAGRAM 137
8.8. NCU SECTION 138
8.9. ITS (INTEGRATED TELEPHONE SYSTEM) AND
MONITOR SECTION 140
8.10. ATAS (AUTOMATIC TELEPHONE ANSWERING
SYSTEM) SECTION 140
8.11. OPERATION BOARD SECTION 142
8.12. LCD SECTION 143
8.13. POWER SUPPLY BOARD SECTION 144
9 REFERENCE MATERIAL DATA 147
9.1. TERMINAL GUIDE OF THE ICs TRANSISTORS AND
DIODES 147
9.2. HOW TO REPLACE THE FLAT PACKAGE IC 148
9.3. TEST CHART 150
10 FIXTURES AND TOOLS 152
11 CABINET, MECHANICAL 153
11.1. OPERATION PANEL SECTION 153
11.2. UPPER CABINET SECTION 154
11.3. LOWER CABINET 155
11.4. MOTOR SECTION 156
11.5. ACTUAL SIZE OF SCREWS 158
12 ACCESSORIES AND PACKING MATERIALS 159
13 REPLACEMENT PARTS LIST 160
13.1. CABINET AND ELECTRICAL PARTS 160
13.2. DIGITAL BOARD PARTS 161
13.3. ANALOG BOARD PARTS 165
13.4. OPERATION BOARD PARTS 166
13.5. POWER SUPPLY BOARD PARTS 167
13.6. FIXTURES AND TOOLS 168
14 PRINTED CIRCUIT BOARD 169
14.1. DIGITAL BOARD (PCB1) 169
14.2. ANALOG BOARD (PCB2) 171
14.3. OPERATION BOARD (PCB3) 173
14.4. POWER SUPPLY BOARD (PCB4) 175
15 FOR THE SCHEMATIC DIAGRAMS 176
16 MEMO 177
17 SCHEMATIC DIAGRAM 178
17.1. DIGITAL BOARD (PCB1) 178
17.2. ANALOG BOARD (PCB2) 182
17.3. OPERATION BOARD (PCB3) 184
17.4. POWER SUPPLY BOARD (PCB4) 185
CONTENTS
Page Page
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KX-FT902LS-B / KX-FT904LS-B

1 INTRODUCTION
1.1. TRANSLATION LISTS
1.1.1. HELP FUNCTION
1.1.2. ERROR MESSAGES
1.1.2.1. DISPLAY
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KX-FT902LS-B / KX-FT904LS-B

1.1.2.2. REPORTS
1.1.3. OTHERS
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KX-FT902LS-B / KX-FT904LS-B

1.2. 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).
1.2.1. 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-FT902LS-B / KX-FT904LS-B

1.2.2. HOW TO RECOGNIZE THAT Pb FREE SOLDER IS USED
P.C.Boards marked as “PbF” use Pb Free solder. (See the figure below.)
Pb Free is not used the Power Supply Board of this unit.
(Example : Digital Board)
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KX-FT902LS-B / KX-FT904LS-B

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-FT902LS-B / KX-FT904LS-B

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.The AC connector is connected properly.
3.Wrap the earth lead around the core 2 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-FT902LS-B / KX-FT904LS-B

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-FT902LS-B / KX-FT904LS-B

2 FEATURES AND SPECIFICATIONS
2.1. FEATURES
General
· Help function
Display: Refer to HELP FUNCTION (P.3).
− − −
− HOW TO SET UP
− − −
− DIRECTORY
− − −
− AUTO ANSWER
− − −
− CALLER ID
Facsimile
· Resolution: Standard/Fine/Super Fine/Photo
· Copier Function
· Help Printout
· Automatic Document Feeder (10 Sheets)
· Easy-to-view LCD (15 Characters)
· Broadcast (up to 10 Stations)
Integrated telephone system
· One-touch dial (22 items)
· Navigator directory (100 items)
2.2. OPTIONAL ACCESSORIES
Model No. Description Specifications
KX-A106 Standard thermal recording paper 216 mm × 30 m roll, with 25 mm core
Note:
Only use the included/specified recording paper, or else the print quality may be affected and/or excessive thermal
head wear may occur .
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KX-FT902LS-B / KX-FT904LS-B

2.3. SPECIFICATIONS
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 mm × 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
Halftone Level: 64-level
Scanner Type: Contact Image Sensor (CIS)
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: Approx. height 120 mm × width 347 mm × depth 270 mm
Mass (Weight): Approx. 2.6 kg (KX-FT902LS-B) Approx. 2.7 kg (KX-FT904LS-B)
Power Consumption: Standby: Approx. 3.0 W
Transmission: Approx. 25 W
Reception: Approx. 40 W (When receiving a 20% black document)
Copy: Approx. 40 W (When copying a 20% black document)
Maximum: Approx. 125 W (When receiving a 100% black document)
Power Supply: 220-240 V AC, 50/60 Hz
Fax Memory Capacity:(KX-FT904LS-
BONLY) Approx. 20 pages of document memory (Based on the ITU-T No. 1 Test Chart in standard resolution.)
*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. (Refer to ITU-T No.1 TEST CHART (P.150).) 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 will not be received.
Subsequent faxes will be retained in memory.
*4 Recording time may be reduced by the calling party’s background noise.
Note:
· Any details given in these instructions 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-FT902LS-B / KX-FT904LS-B

(1) Speaker
(2) Document guides
(3) Document tray
(4) Paper stacker (KX-FT904LS-B ONLY)
The paper stacker may not be shown in all illustrations in
this operating instructions.
(5) Document exit
(6) Document entrance
(7) Cover open button
Note:
· Remove all the blue shipping tapes before
installation.
3 INSTALLATION
3.1. LOCATION OF CONTROLS
3.1.1. FRONT VIEW
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KX-FT902LS-B / KX-FT904LS-B

(1) [TONE]
· To change from pulse to tone temporarily during dialling
when your line has rotary pulse services..
(7) [BROADCAST] (KX-FT904LS-B ONLY)
· To transmit a document to multiple parties.
(8) Station keys
· To use one-touch dial.
(9) [AUTO ANSWER]
· To turn ON/OFF the auto answer setting .
(10) [CALLER ID]
· To use Caller ID features.
(11) [STOP]
· To stop an operation or programming.
(12) [FLASH]
· To access special telephone services or for transferring
extension calls.
(13) [REDIAL] [PAUSE]
· To redial the last number dialled. If the line is busy when
you make a phone call using the [MONITOR] button,
the unit will automatically redial the number up to 5
times.
· To insert a pause during dialling
(14) [MUTE]
· To mute your voice to the other party during a
conversation. Press this button again to resume the
conversation .
(15) [MONITOR]
· To initiate dialling without lifting the handset.
(16) [MENU]
· To initiate or exit programming.
(17) [NAVIGATOR] [VOLUME]
· To adjust volume.
· To search for a stored item.
· To select features or feature settings during
programming.
· To navigate to the next operation.
(18) [HELP]
· To print helpful information for quick reference.
(19) [LOWER]
· To select stations 12-22 for one-touch dial.
(20) [FAX/START] [SET]
· To start sending or receiving a fax.
· To store a setting during programming.
(21) [COPY]
· To copy a document.
3.1.2. CONTROL PANEL
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KX-FT902LS-B / KX-FT904LS-B

3.2. CONNECTIONS
(1) Handset cord.
· The longer, uncoiled end should be connected to the unit.
(2) Telephone line cord.
· Connect to the single telephone line jack.
(3) Power cord.
· Connect to the power outlet (220-240 V, 50/60 Hz).
(4) Paper stacker. (KX-FT904LS-B only)
· The paper stacker may not be shown in all illustrations in these operating instructions.
(5) [EXT]
· Remove the stopper if attached.
(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.
Note:
· To avoid malfunction, do not position fax machine near appliance such as TVs or speakers which generate an intense
magnetic field.
· If any other device is connected on the same line, this unit may disturb the network condition of the device.
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KX-FT902LS-B / KX-FT904LS-B

3.3. INSTALLATION
3.3.1. 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.
3.3.2. PAPER STACKER (KX-FT904LS-B ONLY)
Install the paper stacker.
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KX-FT902LS-B / KX-FT904LS-B

1Open the cover by pressing the cover open button ( ).
2Install the recording paper.
3Insert the leading edge of the paper into the opening above the
thermal head ( ).
4Pull the paper out of the unit.
· Make sure that there is no slack in the paper roll.
5Close the cover securely by pushing down on.
6KX-FT902LS-B
Press [FAX/START], then tear off the excess paper by pulling it
towards you.
6KX-FT904LS-B
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 cover is opened then closed. If the recording
paper is installed upside down, the massage will not be
printed. Install the paper correctly.
· For accessory information.
3.3.3. RECORDING PAPER
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KX-FT902LS-B / KX-FT904LS-B

3.3.4. DOCUMENTS THE UNIT CAN FEED
Note:
· Remove chips, staples or other similar fasteners.
· Do not send the following types of documents. (Use the scanner glass for fax transmission.)
— 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 (i.e. newspaper)
· Check that ink, paste or correction fluid has dried completely.
· To transmit the document with a width of less than standard A4 size (210 mm), we recommend using a copy machine to
copy the original document onto A4 or letter-sized paper, than transmit the copied document.
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KX-FT902LS-B / KX-FT904LS-B

The logo can be your name or the name of your company.
Refer to TRANSLATION LISTS (P.3).
3.3.5. SETTING YOUR LOGO
To enter your logo
Example: “BI LL”
1.Press [2] 2times.
2.Press [4] 3times.
3.Press [5] 3times.
4.Press [ ] to move the cursor to the next space and press
[5] 3times.
1Press [MENU].
2Press [SET].
3Press []or[ ] repeatedly to display the following.To correct a mistake
Press [ ] or [ ] to move the cursor to the incorrect character,
and make the correction.
To delete a character
Press [ ] or [ ] to move the cursor to the character you want
to delete and press [STOP].
To insert a character
1.Press [ ] or [ ] to move the cursor to the position to the
right of where you want to insert the character.
2.Press [MUTE] to insert a space and enter the character.
4Press [SET].
· The underbar shows a position of the cursor.
5Enter your logo, up to 30 characters. See the character table on
page 15 for details.
6Press [SET].
· The next feature will be displayed.
7Press [MENU] to exit.
Note:
· Your logo will be printed on each page transmitted from
your unit.
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KX-FT902LS-B / KX-FT904LS-B

To select characters using or
Instead of pressing the dial keys, you can select characters
using or .
1.Press repeatedly to display the desired character.
Characters will be displayed in the following order.
a.Uppercase letters
b.Number
c.Symbol
d.Lowercase letters
· If you press , the order will be reversed.
2.Press []to insert the character.
· The character displayed in step 1 is inserted.
3.Return to step 1 to enter the next character.
3.3.5.1. TO SELECT CHARACTERS WITH THE DIAL KEYPAD
Pressing the dial keys will select a character as shown below.
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KX-FT902LS-B / KX-FT904LS-B

4 MAINTENANCE
4.1. MAINTENANCE ITEMS AND COMPONENT LOCATIONS
4.1.1. OUTLINE
MAINTENANCE AND REPAIRS ARE PERFORMED USING THE FOLLOWING STEPS.
1.Periodic maintenance
Inspect the equipment periodically and if necessary, clean any contaminated parts.
2.Check for breakdowns
Look for problems and consider how they arose.
If the equipment can be still used, perform copying, self testing or communication testing.
3.Check equipment
Perform copying, self testing and communication testing to determine if the problem originates from the transmitter, receiver or
the telephone line.
4.Determine causes
Determine the causes of the equipment problem by troubleshooting.
5.Equipment repairs
Repair or replace the defective parts and take appropriate measures at this stage to ensure that the problem will not recur.
6.Confirm normal operation of the equipment
After completing the repairs, conduct copying, self testing and communication testing to confirm that the equipment operates
normally.
7.Record keeping
Make a record of the measures taken to rectify the problem for future reference.
4.1.2. COMPONENT LOCATIONS
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KX-FT902LS-B / KX-FT904LS-B