Samsung ML-1440 Manuale utente

SERVICE

LASER PRINTER

ML-1440

Manual

LASER PRINTER CONTENTS

1. Precautions

2. Specifications

3. Disassembly and Reassembly

4. Troubleshooting

5. Exploded Views and Parts List

6. Block Diagram

7. Connection Diagram

Printed in Korea.

VERSION NO. : 1.02 CODE : JC-0066A

This service manual is also provided on the web,

the ITSELF system f Samsung Electronics Co., Ltd.

“http://itself.sec.samsung.co.kr”

This manual is stated and

provided for service description.

information in this manual are prohibited

from free duplication, use or translation

without prior written approval except in

cases allowed by the Copyright Act.

Specifications are subject to change without

prior notice.

Samsung Electronics Digital Printing CS Group

RepairManual

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

RCS

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

Block

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 7TDMI

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

: Normal Connector

: Board on type Connector

Remark

Si ze /E mp ty /Fe ed/Ma nual Senso rs ar e on B©d

Solenoid

MP Tray

(Option)

1- 24VS

2- MP_CLUT CH

1- / MP_EMPT Y

2- GND_5

3- 5V

CN1

CN2

1- GND_5

2- GND_5

3- 5V

4- 5V

5- GND_24

6- GND_24

7- 24VS

8- 24VS

9- 24V

10- 24V

HVPS

MicroSwitchonBoard

In- 24V

Out- 24V S

CN1

CN14

PTL PT L Ct rl

5V CN3

CN2

1- 24VS

2- GND_24

3- 5V

4- GND_5V

5- THV_PWM

6- THVRD

7- /THV_EN

8- /MHV _PWM

9- /DEV_PWM

10- PTL

11- N.C.

12- N.C.

CN2

Thermistor

1- Ther m1

2- Ther m2

Therm1

Therm2

Joint type

CN12 1- Save

2- P_Nar row

3- Empty

4- Feed

5- FAN

6- Clutch

7- Fuser

8- MP_Clutch

9- MP_Empty

10- Motor _PA

11- Motor _PB

12- /Motor_PA

13- /Motor_PB

14- SCF_Cassete

15- SCF_Motor

16- SCF_Clutch

17- SCF_Empty

18- N.C.

19- T herm2

20- T herm1

21- 5V

22- EXT _Clo ck

23,24- 5V

25- 5VPS

26,27,28- GND_5V

CN8

CN3

Network 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- D25, 14- D24, 15- /EIRQ1, 16 - GND5,

17- A5, 18- A 4, 19- A3, 20- /EIRQ0,21- A2,22- D23,

23- D22, 24 - A17, 25- D21, 26- A16, 27- D20,

28- A15, 29- D19, 30- A14, 31- D18, 32- A13 ,

33- D17, 34 - A12, 35- D16, 36- A11, 37- A6,

38- A10, 39- /RESET , 4 0- A9, 4 1- /WAIT , 42 - A8,

43- /IOCS3, 44- A7, 45- /IOCS3, 46- N.C., 47- N.C.,

48- GND5, 49- A18, 50- /RD, 51- /WE, 52- GND5,

53- N.C., 54- N.C., 55- /EIRQ1, 56- GND5, 57- N.C.,

58- 5V, 59- 5V, 60- 5V (60pin Connector)

CN4

Micro- Switch

(For LSU 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- /HSYNC

2- 5VS

3- GND_5

4- /LD_ON

5- /VDO

6- LSUPOWE

R1 200

7- 24VS

8- GND_2 4

9- P_MOT OR

10- /LREADY

11- EXT_CLK

CN6

CN5

Exit

Sensor

1-5V

2-Exit_signal

3-GND_5 CN1 3

Motor

AC In- Let

110V for USA

220V for EU

Power Switch

SCF

(Option)

1- 5V

2- SCF_Sel Cassette

3- SCF_Motor

4- SCF_CL UTCH

5- SCF_Empty

6- 24VS

7,8- GND_5

1- Moto_PA

2- Motor _PB

3- /Motor_PB

4- Motor _PA

Heat Lamp (Fuser)

HOT

Neutral

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- TXD

4- GND- 5V

CN1 0

DCU

(For System Test)

Par allel Port

36 Pin

HOST

(PC)

36Pin

P1284 Con.

CN8

USB Port

4Pin 4Pin

USB Jack

CN7

3-1

Samsung Electronics

SCHEMATIC DIAGRAMS

Repair Manual

3. Schematic Diagrams

3-1 Main Circuit Diagram (1/6)

3-2

SCHEMATIC DIAGRAMS

Samsung Electronics

Repair Manual

Main Circuit Diagram (2/6)

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