Samsung ML-1440 Schematics Diagram

Repair Manual

1. Block Diagram

2. Connection Diagram

3. Schematic Diagrams

CONTENTS

SAMSUNG LASER PRINTER

ML-1450Series

ML-1440

Electronics

Samsung Electronics Digital Printing CS Group

This manual is made and

described centering around

circuit diagram

and circuit description needed

in the repair center

in the form of appendix.

SAMSUNG

1-1

Samsung Electronics

BLOCK DIAGRAM

Repair Manual

1. Block Diagram

OSC.

48 MHz

USB

INTERFACE IC

(USBN9602)

USB

INTERFACE

PARALLEL

INTERFACE

SPGPe

(KS32C61100)

OSC.

20MHz

POWER

ON RESET

PROGRAM ROM

(FLASHMEMORY)

512K*16b*2EA

FONT ROM

(MASK ROM)

512K*16b*2EA

DATA ROM

(DRAM)

1M*16b*2EA

SIMM

(Up to 64MB)

(Option)

Post Script 3

(Flash : 2MB

Font : 2MB)

(Option)

RAS

CAS

RCSRDWR

IOCS

PLL

Reset & W D T

Generation

ROM/SRAM/

FLASH ROM

Control

(4 Bank)

I/O

Control

(5 Bank)

Interrupt

Control

(4 External)

Timer

(3 CH)

Tone

Generator

Engine

Comm. I/F

RAM : 512B

GPIO

VIS

CPU Bus

Interface

Blo ck

Systerm Bus

Interface

Block

[Arbiter]

EDO / FPM

DRAM

Control

(4Bank)

A/D Bus

CPU Addr BUS

CPU DATA BUS

Sys Addr BUS

Sys Data BUS

Sys Cntl BUS

ARM 7TDM I

Cache 8KB

ADC

UART

(3CH)

JBIG

RAM

512B + 512B

OSC.(Video)

53.0109277MHz

/CS,/RD,/WR

NETWORK

INTERFACE

(Option)

SYSTEM DATA BUS

SYSTEM ADDR. BUS

CPU DATA BUS

CPU ADDR. BUS

I / O

INTERFACE

74HC245*2EA

74LS273*3EA

THERM STOR

ADC INPUT

THV READ

ADC INPUT

[ COVER OPEN SWITCH ]

[ LASER DIODE ON/OFF SWITCH ]

SMPS

SUPPLY 5V to each ICS

24V

24VS

SUPPLY 24V to

Motor/HVPS/FAN/LSUA

Laser Diode Vcc

on LSU

LRAM :1296B

CXRAM :256B

PANEL INTERCACE

MOTOR CONTROL

NV RAM INTERCACE

SENSORS INPUT

SOLENOID CONTROL

FAN/PTL CONTROL

SCF INTERFACE

FUSER CONTROL

HVPS CONTROL

LSU INTERFACE

G E U

P V C

P P I

HPVC

HCT

D M A C

(2 CH)

2-1

Samsung Electronics

CONNECTION DIAGRAM

Repair Manual

2. Connection Diagram

SMPS

Controller

: Norm al Connect or : Board on ty pe Connect or

Remark

Size/Emp ty/Feed /Manual Sensor s are on B ©d

Solenoid

MP Tray

(Option)

1- 24VS 2- MP_CLU T CH

1- / MP_EMPTY 2- GND_5 3- 5V

CN1

CN2

1- GND_5 2- GND_5 3- 5V 4- 5V 5- GND_2 4 6- GND_2 4 7- 24V S 8- 24V S 9- 24V 10- 24V

HVPS

MicroSwitchonBoard In- 24V Out- 24VS

CN1

CN1 4

PTL

PTL Ct rl 5V

CN3

CN2

1- 24VS

2- GND_24

3- 5V

4- GND_5V

5- THV_PWM

6- THV RD

7- /THV _EN

8- /MHV_PWM

9- /DEV_PWM

10- PTL

11- N.C.

12- N.C.

CN2

Thermistor

1- Therm1 2- Therm2

T herm1 T herm2

Joint type

CN1 2

1- Save 2- P_Nar r ow 3- Empty 4- Feed 5- FAN 6- Clutch 7- Fuser 8- MP_Clut ch 9- MP_Empty 10- Mot or_PA 11- Mot or_PB 12- /M otor_PA 13- /M otor_PB 14- SCF_Cassete 15- SCF_Motor 16- SCF_Clutch 17- SCF_Empty 18- N.C. 19- Therm2 20- Therm1 21- 5V 22- EXT _Clock 23,24- 5V 25- 5V PS 26,27,28- GND_5V

CN8

CN3

Netwo rk I/F Card

(Option)

1- N .C,. 2- N.C., 3- 5V , 4- /IOCS3, 5- D31 , 6- D30 ,

7- D29, 8- GND5, 9- D28, 10- D27, 11- D26,

12- GND5,13- D 25, 14- D24, 15- /EIRQ1, 16- GND5,

17- A5, 18- A4, 19- A3, 20- /EIRQ0,21- A 2,22- D23,

23- D22, 24 - A17, 2 5- D 21, 26- A 16, 27- D20, 28- A15, 29 - D 19, 30- A14, 31- D18, 3 2- A13,

33- D17, 34 - A12, 3 5- D 16, 36- A 11, 37- A6,

38- A10, 39- /RESET, 40- A9, 41- /WA IT , 42 - A8, 43- /IOCS3, 44- A7, 45 - /IOCS3, 46- N.C., 47- N.C.,

48- GND5, 49- A1 8, 50- /RD, 51- /WE, 5 2- GND5,

53- N.C., 54- N.C., 55- /EIRQ1, 56- GN D 5, 57- N.C., 58- 5V, 59 - 5V , 60 - 5V (60 pin Connecto r)

CN4

Micro-Switch

(For L SU 5VS Cut)

1- 5V 2- 5VS

CN1 1

Panel B' d

LSU

1- 5V 2- GND _5 3- LED1 4- LED2 5- LED3 6- LED4 7- Key 1 8- Key 2

1- /H SYNC 2- 5VS 3- GND _5 4- /LD _ON 5- /VDO 6- LSUPOWE

R1200 7- 24V S 8- GND _24 9- P_MOTOR 10- /LREAD Y 11- EXT _CLK

CN6

CN5

Exit

Sensor

1- 5V 2- Exit_signal 3- GND_5

CN1 3

Motor

AC I n- Let 110V for USA 220V f or EU

Power Switch

SCF

(Option)

1- 5V

2- SCF_Sel Cassette

3- SCF_Mot or 4- SCF_CLUT C H

5- SCF_Empty 6- 24VS

7,8- GND_5

1- Mot o_PA 2- Mot or_PB 3- /M ot or _PB 4- Mot or_PA

Heat Lamp (Fuser)

HOT Neutral

CN5

CN3

CN5 02

CN5 01

DC FAN

1- FAN Control 2- N.C. 3- 24V

CN5 03

1- 5V 2- RXD 3- TX D 4- GND- 5V

CN1 0

DCU

(For System Test)

Parall el Por t 36 Pin

HOS T

(PC)

36Pin P1284 Con.

CN8

USB Port 4Pin

4Pin USB Jac k

CN7

+ 9 hidden pages