DOWNLOAD Panasonic KX-FC253UA-T / KX-FC258RU-T Service Manual ↓ Size: 9.28 MB | Pages: 127 in PDF or view online for FREE

13

(*2) KX-FC253UA-T only

Select Language

Contrast

Register H.set

New Msg. Alert

Keytones

Auto Talk

Voice ABH (AOH)

Calling code

Start/End

On/Off

Ring Delay

Select Category

Ringtone  1

Ringtone  3

Off

60 sec.

Wallpaper1

Colour1

Ukrainian (*2)

Russian

Contrast 3

Auto

On

14

• LCD (Liquid Crystal Display) readout

• 12 second transmission speed *
• A4, G3 compatible
• Automatic document feeder (up to 10 sheets)
• Quick scan
• Resolution: Standard/Fine/Super fine/Photo (64 level)
• Broadcast
• 20-sheet recording paper capacity
• Automatic fax/phone switching

* The 12 second speed is based upon the ITU-T No. 1 Test
Chart on the condition that memory transmission is per-
formed.

Approx. 25 pages of memory transmission
Approx. 28 pages of memory reception

• On-hook dialing
• Digital speakerphone
• Voice muting
• Redialing function
• The Base unit provide a phonebook (100 items)
• The cordless handset provide a phonebook (200 items)

• (for KX-FC253UA-T)

- This unit is ABH and Caller ID compatible. Caller ID ser-

vice corresponds to ETSI ETS300659 standard and
available in 2 protocols: FSK and DTMF. In order to dis-
play caller’s telephone numbers, you must subscribe to
the appropriate service of your service provider/tele-
phone company. 

- This unit is set to ABH service by default.

• (for KX-FC258RU-T)

- This unit is AOH and Caller ID compatible. Caller ID ser-

vice corresponds to ETSI ETS300659 standard and
available in 2 protocols: FSK and DTMF. In order to dis-
play caller’s telephone numbers, you must subscribe to
the appropriate service of your service provider/tele-
phone company. 

- This unit is set to AOH service by default.

• Multi-copy function (up to 20 copies)
• Enlargement and reduction
• Collate
• 64-Level halftone

• Voice Time / Day Stamp
• 15-Minutes recording time

• Fax activation from cordless handset
• Battery performance:

150 hours max. (In continuous standby mode)

15

Power Supply Unit

Operation Panel Board

Digital Board

ANALOG BOARD

Document top

Document set

Charger

I/F Board

+24V 
+24V 
+24V

GND 
GND 
GND

+06V

+04V

Thermal

Head

5

4

3

2

1

CN405

RXE

RM3

RM2

RM1

RM0

Motor

7

6

5

4

3

2

1

8

9

10

11

7

6

5

4

3

2

1

8

9

10

11

COM

DATA

STB2

GND

CLO

CK

TM

+3.3V

GND

STB1

LATCH

COM

CN411

CN404

2

1

MPOS

GND

CN408

7

6

5

4

3

2

1

8

9

10

11

CN402

CN403

7

6

5

4

3

2

1

8

9

10

11

+24V

HEADON

LATCH

STB1

+3.3V

TH_TMP

TH_CLK

STB2

TH_DATA

GND

+6V

+4V

CHARGE

RXE

RM3

RM2

RM1

RM0

MPOS

CIS

7

6

5

4

3

2

1

1

2

3

4

5

6

7

V_LED

G_LED

CLK

DATA

+3.3V

GND

SIG

GND

+05V

KSTART

KLATCH

KRXD

KTXD

KSCLOCK

RESET

6

5

4

3

2

1

6

5

4

3

2

1

HSMIC(+)

HSMIC(-)

GND

HOOK

HSSP(+)

HSSP(-)

Hook Switch 

Board

4 
3 
2 
1

HSMI C(-)

HSSP(+)

HSSP(-)

HSMI C(+)

MIC

2

1

CN5

CN4

CN14

CN203

CN918

MIC

MICAG

Sensor Board

2 
1

GND

FILMEND

+24V

DG

+05V

BELL

LINERLY

LINETX

LINE_P

PSHORT

CP

C

MONRX

BBRX

MDMRX

CLIPRLY/HSALC

DCN

BREAK

LINE_M

SP(-)

SP(+)

COVEROPEN

PTOP

REED

CN206

CN19

CN18

CN103

CN104

CN101

CN102

TO TEL LINE

TO EXT. TEL

1

2

4 
3 
2 
1

Sensor Board

4 
3 
2

1

COVEROPEN

PTOP

REED

GND

SP(+) 
SP(-)

7

6

5

4

3

2

1

8

7

6

5

4

3

2

1

8

7

6

5

4

3

2

1

8

9

10

11

12

13

14

15

7

6

5

4

3

2

1

8

9

10

11

12

13

14

15

7 
6 
5 
4 
3 
2 
1

8

7 
6 
5 
4 
3 
2 
1

8

CN409

Sensor Board

7 
6 
5 
4 
3 
2 
1

8

7 
6 
5 
4 
3 
2 
1

8

CN105

SP

Cordless

Handset

CN106

CN1502

CN1501

7

6

5

4

3

2

1

8

9

10

7

6

5

4

3

2

1

8

9

10

FILM_CHEK

GND

-5V

AG

CN301

CN1001

SW1001

SW1002

SW1003

SW1004

16

The following is an outline of each device IC on the digital board. (Refer to General Block Diagram (P.17).).

1. ASIC (IC10)

Composed mainly of an address decoder and a modem control.
Controls the general FAX operations.
Controls the operation panel I/F.
Controls the thermal head I/F and CIS I/F.
Performs the image processing.
CPU and Real time clock
Provides the reset pulse for each of the major ICs. 

2. Flash ROM (IC16)

Contains all of the program instructions on the unit operations.
This memory is used mainly for the parameter working in the storage area.

3. Dynamic RAM (IC17)

This memory is used mainly for the parameter working in the storage area.

4. MODEM (IC3)

Performs the modulation and the demodulation for FAX communication.

5. Read Section

CIS image sensor to read transmitted documents.

6. Motor Driver (IC401)

Drives the transmission motor and the reception motor.

7. Thermal Head

Contains heat-emitting elements for dot matrix image printing.

8. BBIC (Base Band IC): IC4

Handling all the audio, signal and data processing needed in a DECT base unit
Controlling the DECT specific physical layer and radio section (Burst Module Controller section)
ADPCM codec filter for speech encoding and speech decoding (DSP section)
Echo-cancellation and Echo-suppression (DSP section)
Any tones (tone, sidetone, ringing tone, etc.) generation (DSP section)
DTMF receiver (DSP section)
Clock Generation for RF Module
ADC, DAC, timer, and power control circuitry
All interfaces (ex: RF module, EEPROM, LED, Analog Front End, etc.)

9. RF Module: IC28

PLL Oscillator
Detector
Compress/Expander
First/Second Mixer
Amplifier for transmission and reception

10. FLASH MEMORY: IC23

Voice Prompt (TAM) D/L (DownLoad) Area
Programming for BBIC (IC4)

11. EEPROM: IC22

Temporary operating parameters (for RF, etc.)

12. Sensor Section

Composed of a cover open and film end switch, a document set switch, a document top switch, a paper top sensor and a
motor position switch.

13. Power Supply Board Switching Section

Supplies +4V, +6V and +24V to the unit.