Samsung ML-1450 Schematics Diagram

Repair Manual

Repair Manual

1. Block Diagram

2. Connection Diagram

3. Schematic Diagrams

CONTENTS

SAMSUNG LASER PRINTER

ML-1450Series

ML-1450 / ML-1451N

Electronics

Samsung Electronics Digital Printing
CS Group

Copyright (c) 2002. 1

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

BLOCK DIAGRAM

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

MA

MD

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

5V

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

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

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

3

3-1

Samsung Electronics

SCHEMATIC DIAGRAMS

Repair Manual

3. Schematic Diagrams

3-1 Main Circuit Diagram (1/10)