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The following is an outline of each device IC on the digital board.

1. ASIC (IC106)

This custom IC is used for general FAX operations.

2. G/A (IC107)

(1) OPERATION PANEL I/F: Serial interface with Operation Panel.
(2) ANALOG GATE ARRAY I/F: Controls the ANALOG GATE ARRAY.
(3) MOTOR I/F: Controls the ENGINE Motor.
(4) FAN I/F: Controls FAN MOTOR and detect the rotation of FAN MOTOR.
(5) SENSOR I/F: Controls the LED and detect the sensor signal.
(6) I/O PORT: I/O Port Interface.

3. ROM (IC105)

This 32MB FLASH ROM contains all of the program instructions on the unit operations.

4. Synchronous Dynamic RAM (IC108)

This SDRAM is used for CPU work and receiving memory and page memory.

5. MODEM (IC111)

Performs the modulation and the demodulation for FAX communication.
Detects the CALLER ID signal.

6. Read Section

CIS image sensor to read transmitted documents.

7. LSU (Laser Scanning Unit)

Forms the images on the OPC drum by rotating polygon motor and reflecting the laser beam against polygon.

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, Analog Front End, etc.)

9. RF Module: IC2

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. Analog Board

Composed of ITS circuit and NCU circuit.

13. Sensor Section

Composed of 4 switches and 5 sensors.

14. Power Supply Board Switching Section

Supplies +4V, +5V and +24V to the unit and controls the HEATER.

(1) CPU:

This model uses a Z80 equivalent CPU operating at 16MHz.
Many of the peripheral functions are handled by custom designed LSIs.
As a result, the CPU only needs to process the results.

(2) RTC:

Real time clock.

(3) DECODER:

Decords the address.

(4) ROM/RAM I/F:

Controls the SELECT signal of ROM or RAM and bank switching.

(5) LSU I/F:

Controls the polygon motor and outputs the VIDEO signal to LSU.

(6) I/O PORT:

I/O Port Interface.

(7) ANALOG UNIT:

Sends beep tones,etc.
Convert the analog signal to the digital signal.

(8) MOTOR I/F:

Controls the SCAN Motor.

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15. High Voltage Power Supply Board Section

Supplies bias need for the printing operation: bias of the DRUM, Developing and Transcription.

16. Fixing Unit

Composed heat lamp, thermistor and thermal fuse.

LSU

CIS (monochrome)

ASIC

G/A

LCD

32Mbit

FLASH

CHG

DEV

TRA

+24V

KEY

MA

TRIX

OPERA

TION BO

ARD

HIGH V

O

LT

A

GE 

PO

WER SUPPL

Y BO

ARD

DIGIT

AL BO

ARD

+24V

+5V

T1

T61

32.768KHz

24MHz

ANALOG BO

ARD

TO

LINE

TO

EXT_TEL

DRIVER

THERMISTER

PICKUP

SOLENOID

DC

F

A

N

OPC

G/A

64Mbit

SDRAM

HANDSET

SPEAKER

TO

A

C230V

TO

A

C230V

HEA

T

LAMP

PCB0

P

APER

SENSOR

EXIT

SENSOR

REGIST

SENSOR

C L

K

14.4K

MODEM

DOCUMENT

SENSOR

P

APER

FEED

SENSOR

SCAN

M

OTO

R

DRIVER

DR

UM

DETECT

T

ONER

SENSOR

32.256

MHz

8bit

CPU

RT

C

CO

VER

OPEN

SW

THERMISTER

FLASH

PR

OGRAMMER

+4V

GRID

HOOK_SW

+24V

B

UFFER/

SW

BBIC

SC14429A

DECT

Charger

Handset

ANT

.

10.368MHz

RF

CORDLESS BASE B

.

ENGIN

M

OTO

R

Image

Procession

(IC107)

(IC106)

(IC111)

(IC105)

(IC108)

(IC4)

(IC2

LO

W V

O

LT

A

GE 

PO

WER SUPPL

Y 

BO

ARD

20

FLASH

ROM

G/A

    ANALOG ASIC Control
    E-VOL Control

   SENSOR Detect

    FAN Control
    Motor Control
    I/O port
    DTMF IC Control

SDRAM

MODEM

MOTOR DRIVER

Serial SW

MOTOR

DRIVER

CN107

TO CIS

CN110

TO OPE

CN106

TO TXMOTOR

CN111

TO EXIT

CN114

TO TNR

CN105 TO

POLYGON

CN104

TO LASER

CN101

TO RXMOTOR

CN115

TO ANALOG

CN113

TO FAN

CN109
TO PC

CN112

TO PICK

A/D

BUS
I/F

Print

Controller

Image Processor

DTMF

IC

CN102

TO SMPS

CN103

TO HVPS

XROMCS

SDCLK etc

CLK(16MHz)

CS

TX_OUT

RX_IN

INT

+24V

+5V

RESET/REGULATOR

RESET

+3.3V

+2.5V

+3.3V

+5V

RESET

PS101

PS102

CPU

Cordless/PC I/F

ASIC