Samsung SCX 4520, SCX-4521F, SCX4720F Block Diagram

Block Diagram

Service Manual

9-1

Samsung Electronics

MAIN

SPGPm

ARM946ES

CACHE(16K*2)

SDRAM Control

ROM Control

DMA Control

PVC

GEU/HCT/gCODEC

I/O I/F

EngineControl

IEEE1284/USB2.0

MAIN MOTOR

DRIVER

A3977SLR

Reset

THERM.

26P

2P

2P

600 DPI,COLOR CCD

MAIN MOTOR

FLATEN MOTOR

FAST SRAM

(128 KByte)

CIP4

ImageProcesser

AFE I/F

I/O PORT

MotorControl

DMA Control

RTC

JPEG Codec

CIP4 AFE

FLATEN MOTOR

DRIVER

TEA3718X 2EA

CCD DRIVING

PART

NETWORK

ADF UNIT

P-REGI, P-DET, P-POS

SENSOR

ADF MOTOR DRIVER

TEA3718X 2EA

FLAT COVER SENSOR

OPE

¡ MICOM

¡ LCD/LED Drive

¡ KeyScan

LCD, 16*2 LINES

14P

3P

FUSER

2P

FAN

2P

AC PWR

MHV

SUPPLY

DEV

THV

INLET &

POWER S/W

HVPS

SMPS

COVER S/W

EXIT SENSOR

MP EMPTY

SENSOR

FEED SENSOR

PAPER EMPTY

SENSOR

OPC GND

+5V

+24V

+24VS

AC 110V / 220V

+12V

BootROM (2MBx2ea)

NETWORK INTERFACE CARD

SCF(Option)

SDRAM(32MB)

MEMORY DIMM

DRAM Backup logic

PCL6(2MB x2ea)

PS3(2MB x2ea)

3P

MODEM

FM336

33.6KBPS

AUDIO Drv.

LIU

LINE

EXT. PHONE

LSU

11P

PTL

MAIN CLUTCH

2P

3P

MP CLUTCH

4P

CARTRIDGE INFO.

4P

USB Driver

NET2272

IEEE1284

USB 2.0

USB Host

5P

9

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9. Block Diagram