Panasonic KX-F680BX User manual

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INTRODUCTION
KX-F680BX/KX-F2681BX
SAFETY PRECAUTIONS
1. Before servicing, unplug the 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.
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
(screwheads, control shafts, handle brackets, 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.
The equipment should be repaired and rechecked before it is returned to the customer.
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 parts boxes with aluminum foil.
2) Ground the soldering irons.
3) Use a conductive mat on the worktable.
4) Do not touch IC or LSI pins with bare fingers.
Exposed
metal
part
Ohmmeter
Resistance = more than 5M ¶
(at DC 500 V)

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KX-F680BX/KX-F2681BX
BATTERY CAUTION
AC CAUTION
For safety, before closing the lower cabinet , please make sure of the following precautions.
@ The earth lead is fixed by the screw.
A The AC connector is connected properly.
B Wrap the AC lead around the plastic belt 3 times.
CAUTION
Danger of explosion if battery is incorrectly replaced. Replace only with the same or equivalent type recommended by the
manufacture. Discard used batteries according to following caution:
Disposal of lithium batteries should be performed by permitted, professional disposal firms knowledgeable in state govern-
ment federal and local hazardous materials and hazardous waste transportation and disposal requirements.
Battery continues to have no transportation limitations as long as they are separated to prevent short circuits and packed
in strong packaging.
Commercial firms that dispose of any quantity of lithium cells should have a mechanism in place to account for their ulti-
mate disposition. This is a good practice for all types of commercial or industrial waste.
Recommend Type Number: CR2032 (BATT) Manufactured by MATSUSHITA
CR2032 (BATT) Manufactured by SONY
(BOTTOM VIEW)
AC lnlet
AC Lead
AC Connector
Earth Lead
Earth
Lead
Earth Lead
Screw
Washer

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INTRODUCTION
KX-F680BX/KX-F2681BX
PERSONAL SAFETY PRECAUTIONS
Be careful not to let your hair, clothes fingers, accessories, etc., become caught in any moving sections of the unit.
These are driven by the carriage monitor, and the slow down gear, the paper feed roller, the pressure roller, the eject roller,
the spur, the pick-up roller, etc., which are driven by the paper feed motor. These separation roller and document feed roller
which are rotated by the document feed motor and a gear which makes the two rollers rotate.
Also, the spurs are metal and sharply pointed. Be careful not to touch them accidentally by hand.
Document rollers
Document feed gear
Separation roller gear
Separation roller gear

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KX-F680BX/KX-F2681BX
SPECIFICATIONS
1. Applicable Lines:
2. Document Size:
3. Effective Scanning Width:
4. Printing Paper Size:
5. Effective Printing Width:
6. Transmission Time*:
7. Scanning Density:
8. Halftone Level:
9. Scanner Type:
10. Printer Type:
11. Data Compression System:
12. Modem Speed:
13. Operating Environment:
14. Dimensions (H ~W~D):
15. Mass (Weight):
16. Power Consumption:
17.Power Supply:
18.Total Recording Time:
Public Switched Telephone Network
Max. 216 mm (8 1/2
" ) in width
Max. 600 mm (23 5/8 " ) in length
208 mm(8 3/16
" )
216 mm ~ max. 50 m (8 1/2
" ~164 ' ) roll
208 mm (81/2
" )
Approx.15 sec/page (Original mode)
Approx.30 sec/page (G3 Normal mode)
Horizontal : 8 pels/mm (203 pels/inch)
Vertical : 3.85 lines/mm (98 lines/inch) -Standard mode
7.7 lines/mm (196 lines/inch) -Fine/Halftone mode
15.4 lines/mm (392 lines/inch) -Superfine mode
64-level
CCD image sensor
Thermal printing
Modified Huffman (MH), Modified READ (MR)
9600/7200/4800/2400 bps; Automatic Fallback
5-35 (41-95 °F), 45-80 % RH (Relative Humidity)
118 ~351 ~265 mm (4 21/32
" ~13 13/16 " ~10 7/16 " )
Approx. 3.7 kg (8.2 lb.)
Standby: Approx. 3.5W / Transmission: Approx. 16W
Reception: Approx. 28W / Copy: Approx. 40W
Maximum: Approx. 120W
220-240V AC, 50/60Hz
Approx, 18 minutes (including the greeting message)
Recording time may be reduced by caller side background noise.
KX-A106
KX-A116
KX-A125
Parts No.
Standard Thermal Recording Paper
Standard Thermal Recording Paper
Description
OPTIONAL ACCESSORIES
Super Thermal recording Paper
(Like plain paper)
Comment
216 mm ~ 30 m (8
1/
2
" ~98') roll,
with 25 mm (1") core
216 mm ~ 50 m (8
1/
2
" ~164') roll,
with 25 mm (1") core
216 mm ~30 m (8
1/
2
" ~98') roll,
with 25 mm (1") core
*Transmission speed depends upon the contents of the pages, resolution, telephone line conditions and capability of
receiving unit. 15 second speed based upon CCITT/ITU No.1 Test Chart.
Design and specifications are subject to change without notice.

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INTRODUCTION
KX-F680BX/KX-F2681BX
Control panel
LOCATION OF CONTROLS
Front View
REDIAL/PAUSE
QUICK
MUTE
SLOW
MIC
DIGITAL
SP-PHONE
HELP DIRECTORY MENU RESOLUTION
AUTO RECEIVE
FAX/MSG.SYS.
CALLS
VOLUME
STOP START/COPY/ SET
NEW MSGS.
PLAY BACK
MAIL BOX ERASE
123
RINGER
HANDSET
SPEAKER
OPEN
123
45
678
910
LOWER
FLASH
23
456
789
0
TONE
1
ABC DEF
GHI JKL MNO
PQRS TUV WXYZ
TONE
FLASH
QUICK MUTE
SLOW
REDIAL/PAUSE DIGITAL
SP-PHONE
AUTO RECEIVE
VOLUME
STOP
NEW MSGS. PLAY BACK START/COPY/SET
MAIL BOX
ERASE
Dial keypad
HELP
DIRECTORY
Display panel
MENU
RESOLUTION
Direct call stations
LOWER
Front lid open buttonDocument exit
Microphone
Document feeder tray
Speaker
Document entrance
Document guide(s)

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KX-F680BX/KX-F2681BX
Digital answering system
Voice mailbox
Tone remote control system
Integrated telephone system
One-touch dialer (10 phone number)
50-station speed dialer
Electric telephone directory
Digital Hands-free speaker phone
General
Desktop type
LCD (Liquid Crystal Display) readout
Silent ring fax recognition system
Help function
Copier function
Facsimile
Automatic document feeder (up to 15 sheets)
64-level halftones
Resolution: standard/fine/super fine/halftone
Delayed transmission
Ring pattern detection
Overseas transmission mode
Remote fax receiving using an extension phone
Junk mail prohibitor
FEATURES
NEW MSGS D
PLAY BACK MAIL BOX ERASE
123
SELECT
SELECT
REC CHECK
GREETING
REPEAT SKIP MEMO/
2WAY REC
REC
CHECK
REPEAT
SKIP
MEMO/2WAY REC
_Answering control buttons

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INTRODUCTION
KX-F680BX/KX-F2681BX
Helpful hint:
If assistance is needed, press HELP . The unit will print a quick reference.
CONNECTION
Note:
When you operate this product, the power outlet should be near the product and easily accessible.
HELP
Single telephone line
Power outlet
(220-240 V)
Telephone line cord
Power cord
Dialing mode switch:
Set to TONE.
If you cannot dial,
set to PULSE.
DIALING MODE
TONE PULSE

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KX-F680BX/KX-F2681BX
Hooks
Triangles
INSTALLATION
1
2
3
4
5
Handset
Handset cord
If you want to use this unit with a handset, install the handset and handset cradle.
To save space or to use the unit mainly for faxes, you may remove the handset cradle.
Even if the handset and handset cradle are not installed, you can make or answer calls using the SP-PHONE button.
When you do not use the handset and handset cradle.
1. Installing the handset cradle
Connect the handset cord.
AOpen the front lid by pressing the front lid open
button.
Open the back lid by lifting up the tabs located
on the both side.
B
Insert the handset cradle by matching the triangles.
Place the handset on the handset cradle and close
the lids securely.
Press down the marked on the handset cradle
until clicks in to place.
Make sure the two hooks lock the handset cradle
firmly.
Tab
B
A
Front lid open
button
Triangles

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INTRODUCTION
KX-F680BX/KX-F2681BX
2. Installing the recording paper
A
1
Open the back lid by lifting up the tabs located
on the both side.
Install a recording paper roll in the unit.
Make sure that the shiny side of the paper is
facing down and there is no stack, tape, or
glue residue on the paper roll.
B
2
incorrectcorrect
1 Insert the leading edge of the recording paper
between the recording paper roller and the
silver plate.
2 Insert the paper under the back lid and pull a
few centimeters of paper out of the unit.
3 Close the back lid by gently pressing down on
both ends, and tear off the excess paper by
pulling it toward you.
Note:
Only use the included roll of paper or specified recording
paper, or else the print quality may be affected and/or
excessive thermal head wear may occur.
To order recording paper.
B
A
Tab
Recording paper roller
Silver plate
Back lid

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INTRODUCTION
KX-F680BX/KX-F2681BX
REMARKS
See page 16.
See page 110.
See page 112.
See page 16.
See pages 81, 82.
OPERATION
Document Path
Rollers
Recording Paper
Roller
Thermal Head
LED Array
Sensors
Mirrors and Lens
Abnormal, wear and
tear or loose parts
2-1. MAINTENANCE LIST
2-2. MAINTENANCE CYCLE
These values are only standard ones and may vary depending on
usage conditions.
CHECK ITEM
Remove any foreign matter such as scrap of paper.
If a roller is dirty, clean it with a damp cloth, then let dry thoroughly.
If the platen is dirty, clean it with a damp cloth, then let dry thoroughly.
Remove the paper before cleaning.
If the thermal head is dirty, clean the printing surface with a cloth
moistened with denatured alcohol (alcohol without water), then let dry
thoroughly.
If the LED array is dirty, clean the glass with a dry soft cloth.
Confirm the operation of the following sensors: recording paper sensor
(SW273), Document sensor (PI302), Read position sensor (PI301),
Cover open sensor (SW271), and JAM sensor (SW272).
If the mirror and lens are dirty, clean them with a dry soft cloth.
Replace the part. Be sure that all part's screws are tight.
NO.
1
2
3
4
5
6
7
8
No.
1
2
3
4
5
6
Items
Separation Roller
(Ref. No. 58)
Separation Rubber
(Ref. No. 23)
Feed Roller
(Ref. No. 49, 53)
Target Glass
(Ref. No. 171)
Thermal Head
(Ref. No. 59)
Recording Paper Roller
(Ref. No. 112)
Cycle
3 months
3 months
3 months
3 months
3 months
3 months
Cleaning Cycle
7 years
(63,000 documents)
7 years
(63,000 documents)
7 years
(63,000 documents)
7 years
(63,000 documents)
7 years
(63,000 documents)
7 years
(63,000 documents)
Procedure
See page 109.
––––
See page 109.
––––
See page 112.
See page 110.
Replacement Remarks
Procedure
See P. 16.
––––
See P. 16.
See P. 16.
See P. 112.
See P. 110.

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KX-F680BX/KX-F2681BX
CLEANING THE INSIDE OF THE UNIT
If misfeeding occurs frequently, or dirty patterns or black bands appear on a copied or transmitted document,
clean the document feeder rollers, sub roller, rubber flap, white plate and glass.
Disconnect the power cord and the telephone line
cord.
Open the front lid by pressing the front lid open
button.
Clean the document feeder rollers and roller with a
cloth moistened with isopropyl rubbing alcohol, and
let dry thoroughly.
Clean the rubber flap with a cotton swab moistened
with isopropyl rubbing alcohol, and let dry
thoroughly.
Clean the white plate and glass with a soft dry
cloth.
Clean the front lid by gently pressing down on both
ends.
Connect the power cord and the telephone line
cord.
1
2
3
5
4
6
7
Caution:
Do not use paper products (such as paper towels or
tissues) to clean the inside of the unit.
Glass
Document
feeder rollers
Front lid open button
Rubber flap
White plate
Sub Roller

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KX-F680BX/KX-F2681BX
1. TROUBLESHOOTING SUMMARY
1-1. Troubleshooting
After having confirmed the abnormal condition by asking the user, troubleshoot according to the instructions in
Observe the following precautions when troubleshooting.
1-2. Precautions
1) If there is trouble with the print quality or the paper feed, first check that the installation space and the print
paper meets the specifications, that the paper selection lever/paper thickness lever is set correctly, and that the
paper is set correctly without any looseness.
2) Before troubleshooting, first check that the connectors and cables are connected correctly without any looseness.
Especially, if the abnormality occurs randomly, check very carefully.
3) When connecting the AC power cord with the unit case and checking the operation, exercise utmost care in
handling the electric parts in order to avoid electric shock and short-circuits.
4) After troubleshooting, double check that you have not forgotten any connectors, left any loose screws, etc.
5) And always test to verify that the unit is working normally.

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TROUBLESHOOTING GUIDE
KX-F680BX/KX-F2681BX
2. USER RECOVERABLE ERRORS
If the unit detects a problem, the following messages will appear in the display.
DISPLAY MESSAGE CAUSE AND REMEDY
CALL SERVICE There is something wrong with the unit.
The back lid is open. Close it.
The handset and handset cradle have been removed when you connect the power
cord.
--- When you want to use the handset and handset cradle, install the handset cradle
correctly.
--- When you do not use the handset and handset cradle, set the handset switch to
NO HANDSET. Then, disconnect and connect the power cord again.
The document is not fed into the unit properly. Reinsert the document.
If the misfeeding occurs frequently, clean the document feeder rollers inside the unit.
If the problem remains, adjust the feeder pressure.
Memory (phone numbers, parameters, etc.) has been erased. Re-program.
A mechanical error occurred. Open the back lid and re-install the recording paper.
There is no room left in memory to record a message. Erase some or all of the
messages.
The receiving unit is busy or ran out of recording paper. Try again.
The TEL/FAX greeting message has not been recorded. Record a greeting message.
The unit ran out of recording paper. Install a new recording paper.
CHECK COVER
CHECK CRADLE
CHECK MEMORY
CHECK DOCUMENT
MECHA ERROR
MEMORY FULL
NO RESPONSE
NO TEL GREETING
OUT OF PAPER
POLLING ERROR
REDIAL TIME OUT
REMOVE DOCUMENT
TRANSMIT ERROR
UNIT OVERHEATED
The other fax machine does not provide the polling function. Check with the other
party.
The receiving unit is busy or ran out of recording paper. Try again.
The document is jammed. Remove the jammed document.
Attempted to transmit a document longer than 600 mm (235/8"). Press the STOP button
and remove the document. Divide the document into two or more sheets and try again.
A transmission error occurred. Try again.
The unit is too hot. Let the unit cool down.

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KX-F680BX/KX-F2681BX
Power on.
Look at LCD
plug the AC cord
change faitnly
good
Not yet
Yes, I know
no reaction
AC
12:00AM
LCD
LCD
LCD
Already known symptom
Find out any symptom with
check list (See page 22). See table of troubleshooting item.
See digital board section.
(See page 54) See digital board section. (See page 54)
No reaction means that power line
is broken (short-circuit).
3. DETAIL OF TROUBLESHOOTING
3-1.Outline
Troubleshooting is to make quality and reliability recover by finding out the broken component and exchange or
adjustment or cleaning. We have to find out symptoms and then arrange troubleshooting method.
If it's tough to finding out just a broken component, we should so arrange that block or section are specified, for
example "digital board" or image sensor".
A claim tag from customer or dealer gives us many kinds of expression for same trouble. Because they are not
technician or engineer. But we should carefully read it on our supposition comes from experience, and sufficiently
test the function related to that tag. Returns from customer or dealers often have to claim tag. In this case we need
to find out the symptoms. Therefore please test the unit following simple-check-list. A problem difficult to find out
may lurk, so we need to test repeatedly, for example make copy 10 pages or receiving 10 pages,.........
3-2. STARTING UP TROUBLESHOOTING
Find out the symptom and troubleshooting method

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TROUBLESHOOTING GUIDE
KX-F680BX/KX-F2681BX
Page 30
Page 30
Page 27
Page 28
Page 23
Page 24
Page 25
Page 26
Page 23
Page 24
Page 25
Page 26
Page 31
Page 76
Page 80
Page 81
Page 33
Page 33
Page 69
Page 69
Page 69
Page 69
Page 74
3-3. TABLE OF TROUBLESHOOTING ITEMS
FUNCTION SYMPTOM SEE THIS PAGE
Unit doesn't work at all
Printing
ADF
(Auto Document Feeder)
Paper feed
Abnormal
mechanical sound
Power supply
Operation panel
Sensor
Communication
FAX, TEL
(Analog board)
No character or faint response in the LCD
Skewed sending image
Expanded print
Image is distored
Black or White lateral line on printing
No feed
Paper jam
Multiple feed
Skew
No feed
Paper jam
Multiple feed
Skew
Abnormal sound from the product
Voltage output is abnormal
Keys are not accepted
"REMOVE DOCUMENT" is displayed
"CHECK COVER" is displayed
Can not fax communicate
Error code is displayed
Can not talk
DTMF tone doesn't work
Handset/Monitor sound, volume
TAM doesn't work
Digital speaker phone

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KX-F680BX/KX-F2681BX
transmission
receiving
FINE mode
HALF TONE mode
Handset transceiver / receive
Monitor sound
Ringer sound
Dial operation
Volume operation
VOX detection
Key check
LED check
LCD check
Sensor check
Greeting Rec/Play
Incoming message Rec/Play
Memo Rec/Play
FUNCTION JUDGEMENT REFERENCE
FAX operation
Copy operation
Telephone operation
Operation panel
Sensor
Clock
Digital Speaker phone
Digital TAM
Voice prompt
OK ^NG
OK ^NG
OK ^NG
OK ^NG
OK ^NG
OK ^NG
OK ^NG
OK ^NG
OK ^NG
OK ^NG
OK ^NG
OK ^NG
OK ^NG
OK ^NG
OK ^NG
OK ^NG
OK ^NG
OK ^NG
OK ^NG
OK ^NG
SERVICE CODE 815
(mute LED)
SERVICE CODE 561
SERVICE CODE 557
SERVICE CODE 558
SERVICE CODE 815
gain correctly?
compare to your watch.
SERVICE CODE 784
Check whether voice prompt is
play or not.
3-4. EASY-CHECK-LIST

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TROUBLESHOOTING GUIDE
KX-F680BX/KX-F2681BX
3-5. ADF (Auto document feed) SECTION
(1) No document feed
In document setting, confirm
that beep tone or not.
Check the separation
spring is distorting. Check the sensor
lever movement. Replace the sen-
sor lever.
Replace the defec-
tive parts.
Replace the motor
and connector.
Replace the gear.
Replace IC7.
Replace
motor
Check power supply
unit section. (page 76)
Check the sensor
and digital board.
(pages 54 and 81)
Check the gear.
Is the voltage at emitter
of Q1 +24 V?
Is the voltage at collector
of Q1 +24 V?
Is the voltage at pin 11 of
IC7 less than 2V?
Replace Q1.
Check the Motor and
connector.
Is the phase signal from
pins 73-77 of IC1 out-
put?
Is the solder at pins 73-
77 of IC1 OK?
Replace IC7.
OK?
OK?
OK?
OK?
OK?
OK?
OK?
OK?
YES
END
YES
YES
NO
NO
NG
END
NO
NG
YES
NO
YES NO
YES
NO
Cleaning of separation roller.
( page 109 )
Does the separation roller
rotate?
Check the separation spring
and pad?
Replace the separation
roller unit.
Replace the operation cover
unit.
To digital board
section. (page 54)
Repair.
NO
NO
NG
NG
END
END
YES
NG
NG
OK
NO
YES
YES
YES
YES
NG
OK
OK
NG
END
OK

|24 |
KX-F680BX/KX-F2681BX
Operation Board Cover
White Plate
OK
NG
Operation
cover
Document
Fig. A
Check feed route. Checks the paper jam for markings or objects stuck on the sheet.
Cleaning or replace of
defective parts.
Confirms that the location tip of the read start
sensor flag works smoothly.
Repair or replace the
sensor lever
To Sensor section.
(page 81)
Check if the sensor
reacts while the flag is
moving.
Check the separation, feed and pinch rollers are
attached correctly.
Repair defective parts.
Check each sensors
movement.
Check each rollers
mount.
Check the white plate.
Replace the white plate.
Cleaning the each rollers.
(pages 109 and 110 )
OK?
OK?
OK?
OK?
NG
(2) Paper JAM
OK?
OK?
OK?
NG
NG
NG
NG
YES
YES
YES
END
END
END
END
NO
NO
NO
OK
OK
OK
OK