Samsung ML-7300 Series Bedienungsanleitung

ML-7300 Series

LASER PRINTER CONTENTS

SERVICE Manual

1. Precautions

2. Reference Information

3. Product Information

4. Disassembly

5. Trouble Shooting

6. Exploded Views & Parts List

7. Electrical Parts List

8. Block Diagrams

9. PCB Diagrams

10. Port Thru

(Network Printer Card)

11. schematic diagrams

Samsung Electronics Co., Ltd. September. 2001

Printed in Korea

VERSION NO. : 1.02 P/N. JC-0024A

ELECTRONICS

Contents

1. Precautions

2. Reference Information

3.Product Information

4. Disassembly

1-1 Safety precautions______________________________1-1

1-2 Laser Safety Statement __________________________1-2

2-1 Abbreviations and Acronyms

_____________________2-1

2-2. Diagnostic Control Unit

_________________________2-3

2-2-1. Abstract

________________________________2-4

2-2-2. List of code description

_____________________2-5

3-1 General Specifications ________________________3-1

3-2 Controller Specifications _______________________3-2

3-3 Electrical Specifications _______________________3-2

3-4 Environmental Condition_______________________3-3

3-5 Image Cartridge(Developer) ____________________3-3

3-6 Paper Handling Specifications __________________3-4

4-1 Front View

__________________________________

4-1

4-2 Rear View

__________________________________4-1

4-3 Cabinet Disassembly

__________________________4-2

4-3-1. Cover Right

_____________________________4-2

4-3-2. Cover Left

_____________________________4-4

4-3-3. Cover Front

____________________________4-5

4-3-4. Cover Main

____________________________4-5

4-3-5. Cover Rear

____________________________4-6

4-4 Video Controller board & Joint board

_______________4-7

4-5 Fuser Ass’y

________________________________4-9

4-6 Bracket Motor Ass y & Cover Open Switch Unit

_____4-12

4-7 Pickup Ass’y __________________________________4-14

4-8 Laser Scanner Unit_____________________________4-15

4-9 Multi Purpose Tray _____________________________4-17

4-10 Control Pane_________________________________4-20

4-11 Engine Controller Board ________________________4-22

4-12 SMPS & Bracket Duplex Ass y __________________4-26

4-13 Transfer Roller Ass’y___________________________4-28

ii Samsung Electronics

5. Troubleshooting

6. Exploded Views

& Parts List

7. Electrical

Parts Lists

8- Bloack Diagrams

5-1 Print Quality

________________________________5-1

5-2 HVPS Output Spec _____________________________5-3

5-3 Malfunction____________________________________5-4

5-4 .Connector Pin Assignment

_________________________5-8

5-4-1. Engine Board Connector Pin Assignment

______5-8

5-4-2. Joint Board Connector Pin Assignment

_________5-9

5-4-3. S.C.F Board Connector Pin Assignment ________5-11

5-5 .Troubleshooting of Video Controller

_________________5-12

5-5-1. Troubleshooting Flow Chart __________________5-12

Power Error__________________________________5-13

System Error_________________________________5-14

Engine Error _________________________________5-15

Self Test Error________________________________5-15

Parallel Interface Error _________________________5-16

Printing Error_________________________________5-16

5-5-2. Troubleshooting Table of Video Controller Board__5-16

6-1. Main Ass’y _________________________________6-2

6-2. Cover Ass’y ________________________________6-4

6-3. Frame Ass’y________________________________6-8

6-4. Cassette Ass’y ______________________________6-12

6-5. MP Tray Ass’y ______________________________6-14

6-6. Pick Up Ass’y_______________________________6-16

6-7. Fuser Ass’y ________________________________6-18

6-8. Shield Ass’y ________________________________6-20

6-9. Bracket Duplex Ass’y_________________________6-22

6-10. Bracket Motor Ass’y_________________________6-24

6-11. Frame SCF Ass’y___________________________6-26

6-12. Cassette SCF Ass’y_________________________6-29

7-1. Main Engine PBA ___________________________7-1

7-2. Main Controller PBA ________________________7-5

7-3. FLASH MEMORY PBA _____________________7-8

7-4. PTL PBA __________________________________7-8

7-5. CASSETTE PBA ____________________________7-8

7-6. POSTSCRIPT PBA __________________________7-8

7-7. DISP-PANEL PBA ___________________________7-9

7-8. DISP-LCD PBA _____________________________7-9

7-9. TONER PBA _______________________________7-9

7-10. NETWORK CARD PBA(100BASE) _____________7-10

8-1 WIRING DIAGRAM

___________________________

8-1

8-2 Engine Controller Block Diagram___________________8-2

8-3 Video Controller Block Diagram____________________8-3

iiiSamsung Electronics

9. PCB Diagrams

10.PortThru(NetworkPrinterCard)

CircuitDescription

11. SchematicDiagrams

9-1. Engine Control & Joint Board _____________________9-1

9-2. Cassette Sensor Board__________________________9-2

9-3. Video Controller Board __________________________9-3

9-4. Panel & LCD Board_____________________________9-4

9-5. PTL (Pre Transfer Lamp) Board ___________________9-5

9-6. SCF(Second Cassette Feeder) Board ______________9-6

9-7. Infrared Adapor Board __________________________9-7

9-8. Flash SIMM Board _____________________________9-8

9-9. Postscript Board _______________________________9-8

9-10. Local Talk ___________________________________9-9

9-11. Serial/IrDA Board_____________________________9-10

10-1. Introduction__________________________________10-1

10-2. Board Description _____________________________10-2

10-2-1 Configuration of Network Board_______________10-2

10-2-2 Network Board Connector Pin Assignment ______10-3

10-3 Troubleshooting of Network Card _________________10-4

10-3-1 Troubleshooting Flow Chart__________________10-4

Power Error __________________________________10-5

System Error _________________________________10-6

Network Error ________________________________10-7

PHY Chip Error _______________________________10-8

Shared Memory Interface Error___________________10-9

10-3-2 Troubleshooting Table of Network Card ________10-10

11-1 Main Circuit Diagram_________________________11-1

11-2 Engine Circuit Diagram_______________________11-13

11-3 Cassette Circuit Diagram _____________________11-19

11-4 Panel Circuit Diagram________________________11-20

11-5 PTL Circuit Diagram _________________________11-21

11-6 SCF Circuit Diagram_________________________11-22

1. Precautions

1-1 Safety precautions

Read each caution carefully

1. Do not use the pinter near water or when exposed to inclement weather.

2. Do not place this printer on an unstable cart, stand or table, the product may fall, causing serious damage to the

product.

3. Slots and openings on the cabinet are provided for ventilation. To ensure reliable operation and to protect the

printer from overheation, do not block or cover any of these openings. Do not place the printer in an enclosure

unless the enclosure providesadequate ventilation.

4. Never push any kind of objects into the printer through the cabinet ventilaition slots as they may touch dangerous

hihg voltage points, create short circuits, cause a fire, or produce an electrical shock. Never spill any kind of

liquid on the printer.

5. Do not place the printer in a lacation where someone may trip on the cord.

6. Select a work surface that is lartge enough to hold the printer.

7. Operate this printer using the power source (110V, 220V, etc) indicated on the marking label. If you are not sure

of the type of power source available, consult your dealer or local power company.

8. If you need to use an extension power cord with this printer, make sure that is uses a three-wire grounded cord

and that the total ampere ratings for all of the products using the extension, do not exceed the extension cord

ampere ration.

9. Do not allow anything to rest on th power cord or data communications cable.

10. Unplug this printer from the wall outlet before cleaning. Do not use liquid cleaners or aerosol sprays. Use a damp

cloth for cleaning.

11. Do not touch the surface of the photo-sensitive drum as marks ro scratches may impair print quality.

12. Do not expose the drum unit to direct light for prolonged periods.

13. Use only standard papers, OHP films and approved envelopes.

Precautions

Samsung Electronics 1-1

2. Reference Information

2-1 Abbreviations and Acronyms

Tables 2-1 and 2-2 List abbreviations and acronyms which may be found in this service manual.

Table 2-1. Abbreviations

Abbv Definition Abbv Definition

amps amperes lb pound(s)

lin linearity

ass’y assembly lock bus lock

badac bad assess mm millimeter(s)

neg negative

bps bits per second od open drain

clk clock OSC oscillator

cm centimeter(s) OUT output

CON connector PIC picture

GND ground pos positive or position

HLDA hold acknowledge pot potential

HLDAR hold acknowledge received psynrq page synchronization request

HLDR hold request pwr power

HOR horizontal qty quantity

in inch(es) or input sw switch

INTA interrupt Acknowledge sync synchronous or

synchronization

INT Interrupt tach tachometer

INTR Interrupt request Vcc collector supply voltage(dc)

I/O Input and Output vert vertical

mpx multiplex Vp-p peak-to-peak voltage

VR variable resistor

Reference

Samsung Electronics 2-1

Table 2-2. Acronyms

Acronym Definition Acronym Definition

ABL Automatic Blanking Limiter IDE Intelligent Drive electronics or

Imbedded Drive Electronics

ACC Automatic Color Control IF Intermediate Frequency

ADC Analog to Digital Converter IPM Images Per Minute

ADS Address/Data Status ISA Industry Standard Architecture

ALE Address-Latch Enable KBC Keyboard Controller

ASCII American Standard Code for LAD Local Address/Data Bus

Information Interchange

BIOS Basic Input/Output System LCD Liquid Crystal Display

BPF Band Pass Filter LED Light Emitting Diode

BPS Bits Per Second MCA Micro Channel Architecture

CCFT Cold Cathode Fluorescent Tube MDA Monochrome Display Adapter

CGA Color Graphics Adapter NC No Connection

CMOS Complementary Metal Oxide NF Noise Figure or Noise Factor

Semiconductor

CPU Central Processing Unit PA Power Amplifier

CRT Cathode Ray Tube PBA Printed Board Assembly

CRU Customer Replacement Unit

DMA Direct Memory Access or PBM Primary Bus Master

Dynamic Memory Address

DMAC Direct Memory Access PCB Printed Circuit Board

Controller

DVM Digital Voltmeter PCMCIA Personal Computer Memory

Card International Association

EEPROM Electronically Erasable Pro- PLCC Plastic Leaded Chip Carrier

grammable read Only Memory

EGA Enhanced Graphics Adapter PMS Power Management System

EISA Extended Industry Standard POST Power On Self Test

Architecture

ESDI Enhanced Small Device PPM Pages Per Minute

Interface

FDC Floppy Disk Controller PQFP Plastic Quad Flat Package

FDD Floppy Disk Drive QFP Quad Flat Package

FL Fluorescent Light(Lamp) RAM Random Access Memory

HDD Hard Disk Drive ROM Read Only Memory

HPF High Pass Filter RTC Real-Time Clock

SCSI Small Computer Systems SBM Secondary Bus Master

Interface

SIO Serial Input/Output Controller TSTN Triple Super Twisted Nematic

SOP Small Outline Package UHF Ultrahigh Frequency

SSOP Shrink Small Outline Package VCO Voltage Controlled Oscillator

STN Super Twisted Nematic VESA Video Electronics Standard

Association

SCC Serial Communications VGA Video Graphics Array

Controller

TFT Thin Film Transistor VHF Very High Frequency

TS Tri-State XO Crystal Oscillator

TSOP Thin Small Outline Package

Reference

Samsung Electronics

2-2

2-2. Diagnostic Control Unit

2-2-1. Abstract

The diagnostic Control Unit(DCU) is useful for troubleshooting the Laser beam printer ML Series engines,

and for checking printer status.

The DCU can be used in common for ML series, but each model has several different code description.

Refer to the code description for ML-7300 in next page.

Reference

Samsung Electronics 2-3

ML-80 DIAGNOSTIC CONTROL UNIT

QUICK REFERANCE

BIAS 3

LSU READY

PAPER EMPTY

COVER OPEN

OVER HEAT

BIAS 1

LSU MT&LD

EXIT SENSOR

PRINT HEAT

BIAS 0

LSU MOTOR

FEED SENSOR

STANDBY HEAT

ON OFF

STATUS

SELF

TEST

DIAGNOSTIC

DIAG NOSTIC CODE

MAIN MOTOR OPERATION

MAIN HIGH VOLTAGE ON

TRNSFER HIGH VOLTAGE (-)ON

THV(+) REFERANCE VOLTAGE

DEV/SUPPLY VOLTAGE ON

LSU OPERATING TEST

PICKUP CLUTC ON

PAPER EMPTY SENSOR TEST

FEED & EXIT SENSOR TEST

COVER OPEN SENSORTEST

FUSER TEST

HOT BURN TEST

CLEAN (MESSAGE)PRINT

THV (+) TRIGGER & THV ON

THV (+) DUTY

GREEN STATUS CODE

99 GREEN MODE READY

GREEN MODE WARM UP

STATUS CODE

READE (LEGAL)

READE (LETTER)

READE (A4)

READE (EXECUTIVE)

READE (B5)

PRINT START

PRINT START (MAMUAL)

PRINT START (2'nd PAPER)

FEED SENSOR 1'st ON

FEED SENSOR 1'st OFF

FEED SENSOR 1'st ON (2'nd PAPER)

FEED SENSOR 1'st OFF (2'nd PAPER)

FEED SENSOR 2'st ON

FEED SENSOR 2'st ON (2'nd PAPER)

FEED SENSOR 2'st OFF

PAPER OUT

OPEN FUSER ERROR

LOW HEAT ERROR

OVERHEAT ERROR

WARM UP

COVER OPEN ERROR

SLEEP MODE

NO PAPER or CASSETTE

PAPER JAM 0

PAPER JAM 1

PAPER JAM 2

MANUAL PRINT MODE

LSU NOT READY

* THE CONTROL CODES 13 & 14

ARE USEFU FROM THE EPROM

VERSION 5. X. X. FOR THE

ENGINE BOARD

DCU MODE DOWN SHIFT STOP

UP ENTER

IFYOU ENTER THE DCU MODE

TURNTHEPOWER SWITCH ON WITH HOLDING THREEKEYS DOWN

< Fig 1-1. ML-80 DCU >

2-2-2. List of code description

Reference

Samsung Electronics

2-4

Code Description

1. DIAGNOSTIC CODE 2.STATUS CODE

00 MAIN MOTOR OPERATING 78 SYSTEM ERROR

01 MAIN HIGH VOLT ON / OFF TEST 00 Ready to print from LEGAL paper tray

02 THV (-) ON / OFF TEST 01 Ready to print form LETTER paper tray

03 THV (+) ON / OFF TEST 02 Ready to print form A4 paper tray

04 DEV, SUPPLY ON / OFF TEST 03 Ready to print form EXEC paper tray

05 LSU OPERATING TEST 04 Ready to print from B5 paper tray

06 PICK UP CLUTCH ON 05 Ready to print from FOLIO paper tray

07 PE, DS1, DS2 SENSOR TEST 20 PRINT START (1st CASSETTE)

08 MP, EXIT, FEED SENSOR TEST 21 PRINT START (MULTI PURPOSE)

09 TOP & REAR COVER OPEN, 22 PRINT START (2’nd CASSETTE)

OUT BIN SENSOR TEST 23 PRINT START (DUPLEX)

10 FUSER TEST 50 PAPER OUT

11 HOT BURN TEST 60 OPEN FUSER ERROR

12 DUPLEX CLUTCH TEST 62 LOW HEATER ERROR

13 MULTI PURPOSE CLUTCH TEST 68 OVER HESTER ERROR

14 THERMISTOR 2 TEST 61 WARM-UP

15 PAPER SIZE SENSOR TEST 64 COVER OPEN ERROR

16 FAN SPEED TEST 69 SLEEP MODE

17 PTL TEST 70 NO PAPER or CASSETTE

71 PAPER JAM “0”

72 PAPER JAM “1”

73 PAPER JAM “2”

74 DUPLEX JAM “1”

75 DUPLEX JAM “2”

76 OUT BIN FULL

95 LSU NOT READY

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