Samsung ML-1200 Series Istruzioni operative

Repair Manual

1. Block Diagram

2. Connection Diagram

3. Schematic Diagrams

CONTENTS

LASER PRINTER

ML-1200 Series

1-1

Samsung Electronics

BLOCK DIAGRAM

Repair Manual

1. Block Diagram

1.1 GDI Block Diagram(ML-1210/ML-1220M)

MAIN

S3C46M0X

SDRAM

(8MB)

SMPS

Eng ine

PANEL

B' D

FLASH

MEMORY

(0.5MB)

POWER

CORD

+24V

MOTOR

FAN

EXI T

SENSOR

HVPS

B' D

MHV

OPC GND

SUPPLY

DEV

TH V

BUFFER

MHVPWM

BI ASPW M

THVPWM

POWER

SWITCH

IN-LET

LED

3KEY

IEEE 1284 CABLE

VOLTAGE

DETECTOR

Crystal

10MHz

Mai n

Clock

Oscillator

44 MHz

Video

Clock

Power

Res et

CPU

Jupiter3

USB 74LVX161284

Line

Transcei ver

+5V

FS781BZB

SOLENOIDE

DEV_FUSE

LSU

- This Document can not be used without Samsung's authorization -

1-2

BLOCK DIAGRAM

Samsung Electronics

Repair Manual

MAIN

Option

Up to

68MB

DRAM

(2MB)

MB)

LSU

Eng i ne

PANEL

B' D

FLASH

MEMORY

POWER

CORD

+24V

MOTOR

SOLENOID

FAN

EXIT

SENSOR

HVPS

B' D

MHV

OPC GND

SUPPLY

DEV

THV

MHVPWM

BI ASPW M

THVPWM

POWER

SWITCH

LED

3KEY

IEEE 1284 CABLE

Oscillator

48 MHz

USB

DEV_FUSE

+5V

IN-LET

SMPS

C P U

S3C46C0X01

74HCT273

74ACT273

Devided by

74HC406ON

Crystal

6.7149 MHz

USB Driver

USBN9602-28M

Power

Reset

Main

Clock

Video

Clock

VOLTAGE

DETECTOR

Oscillator

20 MHz

Oscillator

44 MHz

1.2 PCL Block Diagram(ML-1250)

- This Document can not be used without Samsung's authorization -

2-1

Samsung Electronics

CONNECTION DIAGRAM

Repair Manual

2. Connection Diagram

2.1 GDI Connection Diagram(ML-1210/ML-1220M)

+24V_T

+24VGND

*PMOTOR

+3. 3V

EXT_CLK

*HSYNC

+5V

+5V GND

*LD_ON

VDO

+5V GND

LSU

POLYGON

MOTOR

LD DIODE

+5V

+5V GND

LED_ERROR

LED_PAPER

LED_DATA

LED_TONER

*KEY_TONER

*KEY_CANCEL

*KEY_DEMO

LED

DISPLAY

PANEL

+5V

PTL PTL LED ARRAY

+24V_T

+24V GND

THVPWM

*THV_EA

THVRE AD

*MHVPWM

BI ASPW M

+5V

+5V GND

HVPS

THERM_A

THERM_B

THERMI STOR

+24V

+24VS

COVER

SWITCH

+5V

*PEMPTY 1

4*FEED

+5V GND

SENSOR

BOARD

PI N

HOST

COMPUTER

IEEE1284

COMPATI ABLE

CABLE J1 CN9

CN7

CN11

CN12

CN13

CN6

CN8

CN5

SMPS

+5V GND

+5V

+5V GND

+5V

+5V GND

+5V

+24V GND

+24V

+24VS

+24V GND

+24V

+24V GND

+24V

EXIT

FUSER ON

ENGINE

+24VS

FAN

DEV_FUSE

*NEW_DEVE

*EGMOT _A1

EGMOT_PHA

*EGMOT_B1

EGMOT_PHB

4PI N

CONN-

ECTO R

for

USB

USB CABLE

CN3

DCU CN1

+5V

DCU_DATA 1

4DCU_CLK

+5V GND

Not Used

ENGINE+ SMPS

Unification

CLUTCH

SOL E-

NOID

CN1

DEV_FUSE

CN3

CN4

FAN

FUSER

CN502

STEP-

PING

TOR

CN2

CN5

GDI

Main

Board

- This Document can not be used without Samsung's authorization -

2-2

CONNECTION DIAGRAM

Samsung Electronics

Repair Manual

+24V_SLEEP

+24VGND

LREADY*

MOTOR

EXT_CLK

*HSYNC

+5V

+5V GND

*LD_ON

VDO

+5V GND

LSU

POLYGON

MOTOR

LD DIODE

+5V

+5V GND

KEY_TONER*

KEY_CANCEL*

KEY_DEMO*

LED

DISPLAY

PANEL

+5V

PTL

PTL LED ARRAY

+24V_SLEEP

+24V GND

THVPWM

*THV_EN

THVRE AD

*MHVPWM

BI ASPW M

+5V

+5V GND

HVPS

THERM_A

THERM_B

THERMI STOR

+24V

+24VS

COVER

SWITCH

+5V *PEMPTY

FEED_SENSOR*

+5V GND

SENSOR

BOARD

PI N

HOST

COMPUTER

IEEE1284

COMPATI ABLE

CABLE J1 CN12

CN6

CN8

CN11

CN5

CN4

CN2

CN3

SMPS

ENGINE

4PI N

CONN-

ECTO R

for

USB

USB CABLE

CN7

DCU CN9

+5V

DCU_DATA

4DCU_CLK

+5V GND

Not Used

ENGINE+ SMPS

Unification

SOL E-

NOID

CN1

DEV_FUSE

CN3

CN4

FAN

FUSER

CN502

STEP-

PING

TOR

CN2

CN5

PCL

Main

Board

LED_ERROR

LED_PAPER

LED_DATA

LED_TONER

+5V GND

+5V

+5V GND

+5V

+5V GND

+5V

+24V GND

+24V

+24V GND

+24V

+24V GND

+24V

EXIT

+24VS

FUSER ON

+24VS

MOTOR B*

CLUTCH

MOTOR_PB

FAN

DEV_FUSE

MOTOR_A*

NEW_DVE*

MOTOR_PA

2-2 PCL Connection Diagram(ML-1250)

- This Document can not be used without Samsung's authorization -

3-1

Samsung Electronics

SCHEMATIC DIAGRAMS

Repair Manual

3. Schematic Diagrams

3.1 GDI Main Circuit Diagram (1/5)

- This Document can not be used without Samsung's authorization -

3-2

SCHEMATIC DIAGRAMS

Samsung Electronics

Repair Manual

Main Circuit Diagram (2/5)

- This Document can not be used without Samsung's authorization -

3-3

Samsung Electronics

SCHEMATIC DIAGRAMS

Repair Manual

Main Circuit Diagram (3/5)

- This Document can not be used without Samsung's authorization -

3-4

SCHEMATIC DIAGRAMS

Samsung Electronics

Repair Manual

Main Circuit Diagram (4/5)

- This Document can not be used without Samsung's authorization -

3-5

Samsung Electronics

SCHEMATIC DIAGRAMS

Repair Manual

Main Circuit Diagram (5/5)

- This Document can not be used without Samsung's authorization -

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