Samsung ML-2010 Service manual

LASER PRINTER

ML-2010 Series

ML-2010/SEE

LASER PRINTER

ML-2010

The keynote of Product

- Speed : 22ppm (Ltr) / 20ppm (A4), 600dpi

1200dpi

- Paper Path : MPF Type Cassette

- Emulation : SPL (ML-2010 / ML-2015)

- Processor : 150MHz Jupiter4e CPU

- Memory : 8MB

- Toner Cartridge : Initial (1K), Sales (3K)

- MP Cassette : 150 pages / Face Down (50 pages)

- Manual Duplex : Manual Feed Guide

- Fuser Design : Lamp Type

- I/O : USB1.1

- Machine Life : 50K(pages)

Basic Model :ML-2010

Manual

SERVICE

Samsung Electronics Co.,Ltd. May. 2005 Printed in Korea. VERSION NO. : 1.00 CODE : JC-0141D

* This service manual is a property of Samsung Electronics Co., Ltd.

Any unauthorized use of Manual can be punished under applicable international and/or domestic law.

* This service manual is also provided on the web, the ITSELF

system Samsung Electronics Co., Ltd.

http://itself.sec.samsung.co.kr

1. Precautions

1.1 Safety Warning 1-1

1.2 Safety Caution 1-2

1.3 ESD Precautions 1-4

2. Product Specification

2.1 Product Overview 2-1

2.2 Specifications 2-1

2.3 Model Comparison Table 2-5

3. System Overview

3.1 System Outline 3-1

3.2 H/W Structure and Descriptions 3-7

3.3 S/W Structure and Descriptions 3-19

3.4 Initial Product Installation 3-24

4. Alignment and Adjustments

4.1 Sample Pattern 4-1

4.2 Control Panel 4-2

4.3 Consumables and Replacement Parts 4-4

4.4 LED Status Error Messages 4-4

4.5 Periodic Defective Image 4-5

4.6 How to use DCU 4-6

4.7 Paper Path 4-1 1

5. Disassembly and Reassembly

5.1 General Precautions on Disassembly 5-1

5.2 Disassembly and Reassembly 5-2

6. Troubleshooting

6.1 Checking Symptoms 6-1

6.2 Bad discharge 6-4

6.3 Malfunction 6-8

6.4 Bad software environment 6-13

6.5 Bad Image 6-17

7. Exploded Views & Parts List

7.1 Exploded Views and Parts List 7-1

8. Block diagram

8.1 System Block Diagram 8-1

8.2 System Timing Chart 8-2

9. Connection Diagram

9.1 Connection Diagram 9-1

10. Schematic Diagram

10.1 Main Board 10-1

10.2 Connector Circuit Diagram 10-5

10.3 SMPS Circuit Diagram 10-6

10.4 HVPS Circuit Diagram 10-7

Continued

1 1. Reference Information

1 1.1 T roubleshooting Tools 1 1-1 1 1.2 Acronyms and Abbreviations 1 1-2 1 1.3 Selecting printer locations 1 1-4 1 1.4 Sample Tests Patterns 1 1-5

12. Circuit Description

12.1 Engine Controller 12-1

Continued

Precautions

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1. Precautions

The cautions below are items needed to keep in mind when maintaining and servicing. Please read carefully and keep the contents in mind to prevent accidents while servicing and to prevent the machine from getting damaged.

1.1 Safety Warning

(1) Request service by qualified service person. Service for this machine must be performed by a Qualified service person. It is dangerous if unqualified service personnel or users try to fix the machine.

(2) Do not rebuild. Do not attach or change parts discretionary. Do not dissemble, fix of rebuilt it. If so, printer will abnormally work and electric shock or fire may occur.

(3) Laser Safety Statement The Printer is certified in the U.S. to conform to the requirements of DHHS 21 CFR, chapter 1 Subchapter J for Class 1(1) laser products, and elsewhere, is certified as a Class I laser product conforming to the requirements of IEC 825. Class I laser products are not considered to be hazardous. The laser system and printer are designed so there is never any human access to laser radiation above a Class I level during normal operation, user maintenance, or prescribed service condition.

Warning >> Never operate or service the printer with the protective cover removed from Laser/Scanner assembly. The reflected

beam, although invisible, can damage your eyes. When using this product, these basic safety precautions should always be followed to reduce risk of fire, electric shock, and injury to persons.

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Precautions

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1.2 Safety Caution

1.2.1 Noxious Material Precaution

The toner in a printer cartridge contains a chemical material, which may harm human body if it is swallowed. Please keep children out of reach of the toner cartridge.

1.2.2 Electric Shock or fire Precaution

It is possible to get electric shock or burn by fire if you don't fallow the instructions of the manual.

(1) Use exact voltage. Please use an exact voltage and wall socket. If not, a fire or an electric leakage can be

caused.

(2) Use authorized power cord. Do use the power cord supplied with PRINTER. Afire can happen when over cur-

rent flows in the power cord. (3) Do not insert many cords in an outlet. Afire can be occurred due to flow over current in an outlet. (4) Do not put water or extraneous matter in the PRINTER. Please do not put water, other liquid, pin, clip, etc. It

can cause a fire, electric shock, or malfunction. If this occurs, turn off the power and remove the power plug

from outlet immediately. (5) Do not touch the power plug with wet hand. When servicing, remove the power plug from outlet. Do not insert

or take off it with wet hand. Electric shock can be occurr. (6) Caution when inserting or taking off the power plug. The power plug has to be inserted completely. If not, a fire

can be caused due to poor contact. When taking off the power plug, grip the plug and take it off. If grip the line

and pull over, it could be damaged. A fire or electric shock could happen. (7) Management of power cord. Do not bend, twist, or bind it and place other materials on it. Do not fix with sta-

ples. If the power cord gets damaged, a fire or electric shock can happen. Adamaged power cord must be

replaced immediately. Do not repair the damaged part and reuse it. A repaired part with plastic tape can be

cause a fire or electric shock. Do not spread chemicals on the power cord. Do not spread insecticide on the

power cord. Afire or electric shock can be happen due to thinner(weak) cover of the power cord. (8) Check whether the power outlet and the power plug are damaged, pressed, chopped, or blazing fire or not.

When such inferiorities are found, repair it immediately. Do not make it pressed or chopped when moving the

machine. (9) Caution when there is thundering or lightning, and being flash of lightening. It causes a fire or electric shock.

Take the power plug off there is thunder. Do not touch cable and device when thundering and flash of lighten-

ing. (10) Avoid the place where is moisture or has dust. Do not install the printer where lots of dust or around humidifi-

er. A fire can occurred. A plug part need to clean well with dried fabric to remove dust. If water drops are dripped on the place covered with dust, a fire can occurred.

(11) Avoid direct sunlight. Do not install the printer near window where direct contacts to the sunlight. If the

machine contacts sunlight long time, the machine cannot work properly because inner temperature of the machine is getting hotter. A fire can occur.

(12) Turn off the power and take off the plug when smoke, strange smell, or sound from the machine. If you keep

using it, a fire can be occurred.

(13) Do not insert steel or metal piece inside/outside of the machine. Do not put steel or metal piece into a ventila-

tor. An electric shock could happened.

Precautions

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1.2.3 Handling Precautions

If you ignore this information, you could harm machine and could be damaged.

(1) Do not install it on different levels, or slanted floor.

Please confirm whether it is balanced or not after installation. If it is unbalanced, an accident can be hap-

pened due to the machine falling over.

(2) Be careful not to insert a finger or hair in the rotating unit.

Be careful not to insert a finger of hair in the rotating unit (motor, fan, paper feeding part, etc) while the

machine is operating. Once it happens, you could be harmed.

(3) Do not place a pot containing water/chemical or small metals. If they got caught into the inner side of

machine, a fire or electric shock can be occurred.

(4) Do not install it where lots of moisture or dust exists or where raindrop reaches. A fire or electric shock

can be caused.

(5) Do not place a candlelight, burning cigarette, and etc. on the machine. Do not install it near to heater. A

fire can be occurred.

1.2.4 Assembly/Disassembly precaution

When replacing parts, do it very carefully . Memorize the location of each cable before replace parts for reconnecting it afterwards. Do memorize. Please perform the steps below before replace or disassembly the parts.

(1) Check the contents stored in the memory. All the information will be erased after replacing main board.

The information needed to keep has to be written down.

(2) Before servicing or replacing electric parts, take off a plug. (3) Take off printer cables and power cord connected to printer. (4) Do use formal parts and same standardized goods when replacing parts.Must check the product name,

part cord, rated voltage, rated current, operating temperature, etc.

(5) Do not give an over-force when release or tighten up the plastic parts. (6) Be careful not to drop the small parts such as screws in the printer. (7) Be careful not to change the location of small parts such as screws when assembling and disassembling. (8) Do remove dust or foreign matters completely to prevent fire of tracking, short, or etc. (9) After finished repair, check the assembling state whether it is same as before the repair or not.

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Precautions

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1.3 ESD Precautions

Certain semiconductor devices can be easily damaged by static electricity. Such components are commonly called “Electrostatically Sensitive (ES) Devices”, or ESDs. Examples of typical ESDs are: integrated circuits, some field effect transistors, and semiconductor “chip” components. The techniques outlined below should be followed to help reduce the incidence of component damage caused by static electricity.

Caution >>Be sure no power is applied to the chassis or circuit, and observe all other safety precautions.

1. Immediately before handling a semiconductor component or semiconductor-equipped assembly, drain off any

electrostatic charge on your body by touching a known earth ground. Alternatively, employ a commercially available wrist strap device, which should be removed for your personal safety reasons prior to applying power to the unit under test.

2. After removing an electrical assembly equipped with ESDs, place the assembly on a conductive surface, such

as aluminum or copper foil, or conductive foam, to prevent electrostatic charge buildup in the vicinity of the assembly .

3. Use only a grounded tip soldering iron to solder or desolder ESDs.

4. Use only an “anti-static” solder removal device. Some solder removal devices not classified as “anti-static” can

generate electrical charges sufficient to damage ESDs.

5. Do not use Freon-propelled chemicals. When sprayed, these can generate electrical charges sufficient to dam-

age ESDs.

6. Do not remove a replacement ESD from its protective packaging until immediately before installing it. Most

replacement ESDs are packaged with all leads shorted together by conductive foam, aluminum foil, or a comparable conductive material.

7. Immediately before removing the protective shorting material from the leads of a replacement ESD, touch the

protective material to the chassis or circuit assembly into which the device will be installed.

8. Maintain continuous electrical contact between the ESD and the assembly into which it will be installed, until

completely plugged or soldered into the circuit.

9. Minimize bodily motions when handling unpackaged replacement ESDs. Normal motions, such as the brushing

together of clothing fabric and lifting one’s foot from a carpeted floor, can generate static electricity sufficient to damage an ESD.

System Overview

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3. System Overview

3.1 System Outline

Paper Path Layout

BIN PATH

❶ SMPS ❷ Fuser ❸ Toner Cartridge ❹ LSU ❺ Exit Roller ❻ OPC ❼ Pick-Up Roller ❽ KNOCK-UP PLA TE ❾ KNOCK-UP PLA TE DOWN ❿ ASS’Y HOLDER PAD 󱆌 Feed Sensor 󱆍 MAIN PBA 󱆎 SMPS 󱆏 HVPS

󱆏

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System Overview

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Unit Layout

HVPS

SMPS

Main PBA

Motor

LSU

Panel

System Overview

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Service Manual

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3.1.1 Feeding

There are the C-path type, which loads papers, and the manual feeder, which supplies paper one by one.The cassette has the function pad which separates paper one by one, and it has the sensor function to check the existence of the loading paper.

1) Feeding Type : MPF Type

2) Feeding Standard : Center Loading

3) Feeding Qty : Cassette 150 sheets (75g/

, 20lb paper standard)

4) Manual 1 sheet (Paper, OHP, Envelope etc.)

5) Separating Type : Cassette - Friction Pad Type

6) Manual : None

7) Driver Type : Driving by Gearing from Main Motor

8) Pick_up Roller Driver : Solenoid

9) Paper detecting Sensor : Photo Sensor

10) Paper Size Sensor : None

11) Paper Exit Type : Face Down

12) MP Tray : MP Cassette Type (Cener Loading)

3.1.2 T ransfer Ass’y

The transfer roller delivers the toner of the OPC drum to the paper.

- The life span : Print over 50,000 sheets (in 16 ~30 )

3.1.3 Driver Ass’y

It is a power delivery unit by gearing. By driving the motor, it supplies the power to the feeding unit, the fusing unit, and the distributing unit.(Motor drive IC : A3977)

- It is a power delivery unit by gearing : Feeder/Developer Motor Fuser/Exit

3.1.4 FUSER

The fuser is consisted of the Heat Lamp,Heat Roller,Pressure Roller,Thermister and Thermostat. It adheres the toner on the paper with pressure and heat to complete the printing job.

- Life Cycle : 50K(pages)

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System Overview

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1) Heat Lamp

. Heat Lamp Terminal Shape : Terminal Single Type . Voltage 120 V : 115 + /- 5 %

220 V : 230 + /- 5 % . Capacity : 600 Watt + /- 30 W . Life : 3000 Hr

2) Thermostat . Thermostat Type : Non-Contact type THERMOSTAT . Control Temperature : 150 5

3) Thermistor . Thermistor Type : HF-R0060 (SEMITEC 364FL Type) . Temperature Resistance : 7 (180 ) . SYSTEM Temperature SETTING

- Stand by : 165 + /- 5

- Printing : 175 + /- 5 (5 minutes before) 170 + /- 5 (5 minutes after)

- Overshoot : 200 or less

- Overheat : 210 or less

4) Heat roller . Length : 254 mm . Valid length : 222 mm . GND Type : H/R Bearing Grounding type By SECC Fuser frame

5) Pressure roller . Shaft

- Length : 239.5 mm

. Rubber

- Length : 222 mm

6) Paper separation method

Teflon Coating with SUS Plate Claw System

7) Safety Relevant Facts . Protecting device when overheating

- 1st protecting device : H/W cuts off when detecting an overheating

- 2st protecting device : S/W cuts off when detecting overheating

- 3st protecting device : Thermostat cuts off the power

. Safety device

- The power of Fuser is cut-off after front cover is open.

- The overheating safety device for customer

- The surface temperature of the Fuser Cover is under 80

System Overview

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Service Manual

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3.1.5 LSU (Laser Scanner Unit)

The LSU unit is controlled by video controller. It scans the video data received from video controller with laser beam by using the rotation principle of the polygon mirror to create the latent image on the OPC drum. It is the core part of LBP. The OPC drum rotates as the same speed as the paper feeding speed. It creates the /HSYNC signal and sends it to the engine when the laser beam of the LSU reaches the end of the polygon mirror, and the engine detects the /HSYNC signal to arrange the vertical line of the image on the paper. After detecting the /HSYNC signal, the image data is sent to the LSU to arrange the its margin on the paper. The one side of the polygon mirror is one line for scanning..

OPC Drum

Photo Diode

LD Driver circit

Protector panel

LD(Laser Diode)

Polygon Mirror

Polygon Motor

Motor Driver

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System Overview

3-6

Cleaning Roller

Cleaning Blade

-720V

-350V

-550V

0.20mW

Max -1.4KV

-100V

+5KV

-150V↓

3.1.6 T oner Cartridge

By using the electronic photo process, it creates a visual image. In the toner cartridge, the OPC unit and the developer unit are in a body. The OPC unit has OPC drum and charging roller, and the developer unit has toner, toner cartridge, supply roller, developing roller, and blade (Doctor blade)

- Developing Method: Non magnetic 1 element contacting method

- Toner: Non magnetic 1 element shatter type toner

- The life span of toner: 2,000 sheets (ISO 19752 Pattern/A4 standard)

- Toner Cartridge : Initial(1,000), Sales(3,000)

- Toner remaining amount detecting sensor: None

- OPC Cleaning: Collect the toner by using electric static + FILM OPC

- Management of disusable toner: Collect the toner by using electric static (Clenerless Type- No disusable toner)

- OPC Drum protecting Shutter: None

- Classifying device for toner cartridge: ID is classified by interruption of the frame channel.

System Overview

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3.2 H/W Structure and Descriptions

3.2.1 H/W Overview

ML-2010 is roughly made up Main Control part and SMPS/HVPS part. Main Controller uses Jupiter4E for its ASIC, which is on chip micro controller and developed for Low-end Laser Beam Printer. Jupter4E provides the integrated printing functions such as Printer video controller, Laser Scan Unit controller, PWM controller and Bi-polar Stepper Motor Controller and has USB interface and built-in Flash memory with 4Mbits capacity.

3.2.1.1. Main Control

ML-2010 of Main Control are composed of CPU and Print and operate follows function by CPU

- Bus Control, I/o

- Handling, each Driver and PC Interface Main Control operate its full function on the Main B'd and CPU control Controller ASIC and build-in Memory.

3.2.1.2 CPU

Use 32Bit RISC Processor of Jupiter4e, and control system by operating Operation Block of the System Program inside Flash Memory.

SMPS

HVPS

Jupiter IV ASIC V1.1 USB

Printer Engine

B’D

DRAM 2M Byte

Flash Memory

0.5M Byte

OPE B’D

(Build-in HVPS)

Main Controller

LSU

Motor

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Service Manual

System Overview

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- Main Function Block: Completely Integrated System for Embedded Applications,

32 Bit Risc Architecture, Efficient and Powerful ARM9 CPU LSU Interface Module for Interfacing PVC with LSU 2 Channel General Purpose DMA Controller for High Speed I/O Dual Memory Bus Architecture

- Operation Frequency : 150MHz

- Operation Voltage : 3.3V

- POWER ON RESET TIME : 6.6ms below

3.2.1.3 Flash Memory

Store System Program and can be down load System Program through PC Interface

- Capacity : 0.5M Byte

- Access Time : 70 nsec

3.2.1.4 DRAM

When Printing, use Band Buffer, System Working Memory Area .

- 8M capa : 8M Byte basic. 2M :Printing System Working Memory Area

- Access Time : 60 nsec

3.2.1.5 ENGINE

This recording method is electrophography method using LSU, which toner is composed of 1 component and non magnetic.

1) Recording Method : LSU(Laser Scanning Unit)

2) Printing Speed : 20ppm (In continuing printing base A4, printing pages from 2nd to last during 1min)

3) Recording Density : 600 dpi 1200 dpi

4) Cassette Capa. : Cassette ; 150sheets(75g Base),

Manual : N/A((DRIVE Selection : Paper, OHP, Envelop - 1 sheet)

5) Paper Size : Cassette ,Manual; Width = 76 ~ 216mm, Length = 125mm ~ 356mm

6) Effective recording size

- A4 : 202 x 291 mm

- Letter : 208 x 273 mm

- Legal : 208 x 350 mm

- Folio : 208 x 325 mm

- Top Margin : 4.23 ° 3 mm

- Left, Right Margin : 4.23 ° 3 mm

7) CRU(Toner Cartridge)Life : 2,000pages Printing(A4, 5% Pattern Printing)

8) First Print Out Time : within 11sec( Standby )

9) Warming up time : within 30sec (Ambient : 25° )

System Overview

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3.2.2 Main Board

Main Board are composed of Engine and Controller on the one-Board. Main Board control to send Current Imagedml Video Data to LSU to print and have motor Driving and Circuit for the current driving and also include Paper Exit Sensor, Cover Open s/w, panel s/w.

12.0MHz

U12

U10

(IC-DRAM/

512K x 16Bit)

(IC-POSI, ADSUST REG)

(IC-CMOS LOGIC, INVER TER)

(IC-MOTOR DRIVER)

(IC-VOLTAGE COMP)

(IC-CLOCK GENERATOR)

(IC-EEPROM/256x12Bit)

(IC-POSI, FLXED REG)

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U6(Jupiter 4E)

- It is a main CPU and an Asic of Jupiter4E which has a CPU core CLK with over 150MHz and a System bus 75MHz.

- It use 3.3V for operation voltage and I/O, It uses 75MHz for system bus CLK, Built in Flash Memory.

SDRAM

- Main memory. SDCLK is 75Mhz.

A3977

- It is an Main motor driver IC and controls the motion of main motor.

Regulator

- It Supplies the core voltage to CPU by converting 3.3V to 1.8V.

EEPROM(U8 : 93C66)

- It is an EEPROM with 12C method.

SMPS connector(CN8)

- It connects SMPS, supplies the power, and delivers the high voltage contol signal, etc. If a harness is not normally

connected to this connector, power cannot be supplied.

LSU connector(CN12)

- It connects a LSU.

DC Motor connector(CN11)

- It connects an main motor and drive a DC motor.

HVPS connector(CN10)

- It connects a HVPS.

DCU connector(CN1)

- It interface a DCU-JIG

USB connector(CN6)

- It interface a the printer.

System Overview

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3.2.3 Asic(SPGPm) Specification

3.2.3.1 Introduction

Jupiter4E is One-Chip micro-Controller for Low cust Laser beam Printer.

1. One Chip Laser Beam Printer Controller

- GDI only

- AMBA AHB used for high speed bus transactions between masters and slaves

- AMBA APB used for low speed bus transactions between ARM core and peripherals

- 3 PLLs ( 2 Dithered PLL and 1 General PLL) first for CPU(150MHz), AHB(75MHz), APB(75MHz), second for USB(48MHz) third for PVC(59MHz)

- 75MHz system operation

- 1.8V power operation

- 3.3V tolerant input and bi-directional I/Os

- SDRAM and IO Address / Data signals multiplexing

2. Integrated ARM940T 32-bit RISC embedded processor core

- 150MHz core frequency operation

- Harvard Architecture Cache : 4KByte Instruction cache, 4KByte Data cache

- Single memory bus architecture

3. Built in Flash Memory

- 4MBits (128Kx32bits)

- Serial programming mode using flash programmer tool

- Internally flash memory read / write operation support

- Programmable access timing control

4. 32MB Special function Register Area

5. Directly connected to 3 external IO banks (IOC)

- 32 MB size in each IO bank

- Programmable setup, access, hold timing

- Programmable recovery time for slow devices

- Allows to access peripheral devices such as GPIO control logic

6. Directly connected to 1 external ROM bank (ROMC)

- 32 MB size for one ROM bank

- One external flash memory attachable.

7. Directly connected to two SDRAM banks (SDRAMC)

- Extensible architecture

- Two external SDRAM attachable.

- SDRAM controller supports PC-100 and PC-133 SDRAM running at 75MHz

- Up to 32MB per bank.

- Support for SDRAM configurations including programmable column address

- Programmable refresh interval

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8. Interrupt Controller (INTC)

- FIQ or IRQ mode operation selectable

- Programmable Interrupt Enable/Disable

9. USB interface

- Version 1.1

- Four 128x8 FIFOs for Data transmission.

- Interrupt based input / output interface, no DMA based interface support

- USB wrapper for AHB interface

- AHB Bus interface

10. Serial port interface (UART)

- Programmable Baud Rate

- 2 channel Independent Full Duplex UART

- Polling, Interrupt based operation support

- Max 16 byte FIFO to handle SIR Bit Rate Speed

11. Printer video controller for LBP engines (PVC)

- 80MHz video rate (Hummingbird 2 : letter - 21 ppm, A4 : 20ppm)

- video data transmitted through LSU Controller

12. Laser Scan Unit (LSU) Controller

- Laser Scan Unit (LSU) Interface for Laser Diode turn on/off timing control

- Sample & hold period generation.

- Auto Power Control for Laser Diode with PID control method using internal 10 bits DAC.

- LSU clock generation

- Brushless DC motor control clock generation

13. ADC Interface

- 4 channels ADC interface for analog devices such as temperature sensor.

- Programmable ADC Clock Cycle.

- Automatic or Manual AD Conversion support.

- 4 Special Function Registers for monitoring the ADC results for 4 channels.

14. PWM Controller

- 4 PWM output ports - THV, BIAS, FAN control and AC ELECTRIFICATION

15. Bi-polar Stepper Motor controller (MOTORC)

- Phase generation for the purpose of paper feeding

- fixed hardware phase and current table

- programmable phase and interval time

- Interrupt based phase change operation

16. Timer

- 3 Independent Programmable Timers

- Watch Dog Timer for S/W Trap

17. Miscellaneous

- Mux controlled 24 GPI, 28 GPO & 5 GPIO ports .

- Mutual exclusive GPO/GPIO ports control by the port control enable register

- Programmable Bus Master Priority.

- Project code added.

System Overview

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3.2.3.2 Jupiter4E Internal Block Diagram

TMS

TCK

TDI

TDO

nTRST

ARM CORE

(

ARM940T

I/C 4KB

D/C 4 KB

)

PPI

PDE, BUSY, nACK,

SELECT, PERROR,

nFAULT

PPD[7:0]

APB

BRI DGE

AHBC

( ARB,DEC,MUX)

FLASH CORE

( mfl 130_128Kx32 )

SCL

SDA

PROGRAM

SDRAMC

( EXT : 2 CH)

nSRAS

nSCAS

nSCS

DQM1-0

BA1-0

SCKE

ADDR18-0

DATA15-0

nOE

ADDR / DATA

BUS MUX

IOC (3CH)

/ROMC(1CH)

nIOCS1-0

INTC

TCU

MISC

PLL

( pll 2096x, pll 2073x)

CL O CK & RE SE T

EXTCLK

nRESET

OM2-0

CAP2-0

MOTORC

MOTPAT5-0

LSUC

( dac1264x_ 1455)

nLREADY

nHSYNC

VDO

ADC INTERFACE

( adc1275x_ pc)

ADCIN3-0

PWM

PWM3-0

LSUCLK

SCLK

A H B

A P B

A H B

UART

RXD1-0

TXD1-0

SHPERIOD

nLDON

DACOUT

TEST

USB CORE

(

USB 1 . 1

)

D+

D-

Dpullup

VBUS

nSTROBE,

nINIT,

nSLCTIN,

nAUTOFD

nROMCS

nSWE/nWE

TIC

ENEXHV

EXHV

DC2-0

PVC

nIOCS2_WE

nIOCS2_OE

nIOCS_ALL

BLDC_CLK

GPO27-0

GPIO4-0

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3.2.4 Sensor Controller

3.2.4.1 Paper Feeding/Width

When a paper passes an actuator of a feed sensor unit after feeding a paper into a set,it detects a signal of the photo interrupter and informs the paper feeding status to CPU. After sensing the signal and certain time later, it strews an image data.(Related in Paper Front Edge Adjustment) If it could not detect the feed sensor within 1 second after feeding a paper, a paper jam0 (CPU#_) occurs. ML-1610 differs from other general printers because it doesn’t have a paper empty sensor. It recognizes the paper existing status by using a firmware. If a paper is not fed, it recognizes the state as no paper (Red and Yellow lights turn on among other LEDs). With the same principle, it senses the OPC unit. After OPC unit is mounted,the actuator operates. When it passes the actuator of sensor unit, it detects the signal of the photo interrupter, informs the existing OPC unit to CPU, and then stays at the status.

3.2.4.2 Paper Empty Sensing

The paper empty is detected by the empty sensor mounted to an engine board and the actuator mounted to a frame. Paper senses the on/off time of the empty sensor by using CPU and informs the normal operation status and the jam occurrence status to CPU.

3.2.4.3 Jam Cover/Cover Open Sensing

ML-1610 uses two M/S:one senses the cover open and the other senses the jam cover open. The cover open sensor is located on the left bottom of HVPS.When the front cover is open, +24V supplied to each unit (DC fan,Solenoid,Main Motor,Polygon Motor Unit of LSU in Fusing Unit,and HVPS)is interrupted. The jam cover open sensor is located on the left bottom of SMPS. When the jam cover is open, +24V supplied to each unit (DC fan, Solenoid, Main Motor, Polygon Motor Unit of LSU in Fusing Unit, and HVPS) is interrupted. D0 bit of CPU detects the jam cover open/cover open, and D7 bit of CPU detects the existence of OPC. In this case, it informs the status to user by turning on the red LED among OP panel LEDs.

3.2.4.4 Solenoid Driving Circuit

The solenoid consists of two used for paper pick-up and MP signal. D4 bit of CPU turns it on/off, and its driving time is 300ms. The diode protects the drive TR from the pulse (noise)generated by de-energizing operation of solenoid.

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3.2.5 SMPS board (Switching Module Power Supply)

The SMPS supplies DC Power to the System. It takes 110V/220V and outputs the +5V, +24V to supply the power to the main board and other board. It is consisted of the AMPS part, which supplies the DC power for driving the system, and the AC heater control part, which supplies the power to fuser. SMPS has two output channels. Which are 5V and +24V

Pin No Pin Name

1 +24VS2 2 +24V 3 +24VS1 4 +24VS1 5 +5V 6 DGND 7 DGND 8 P_REGI 9 FUSER ON

<CON2>

Pin Signal

CON1(Inlet)

Micro Switch

CON2 (Output)

Exit Sensor

F1(Fuse/250V, 5A)

Power Switch

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1) SMPS Specification

- AC Input Input Rated Voltage : AC 220V ~ 240V, AC 120V / AC 220V(110V version) Input Voltage fluctuating range : AC 90V ~ 135V / AC 180V ~ 270V(220V version) Rated Frequency : 50/60 Hz Frequency Fluctuating range : 47 ~ 63 Hz Input Current : Under 4.0Arms / 2.5Arms (But, the status when lamp is off or rated voltage is inputted/outputted )

- Rated Output Power

- Consumption Power

- Power Cord Length : 1830°

50mm

- Power Cord Switch : Use

- Feature

. Insulating Resistance : 100 or more (at DC 500V) . Insulating revisiting pressure : Must be no problem within 1 min. (at 1000Vac,10mA) . Leaking Current : under 3.5mA . Running Current : under 40A PEAK (AT 25 , COLD START)

under 50A PEAK (In other conditions) . Rising Time : within 2Sec . Falling Time : over 20ms . Surge : Ring Wave 6KV-500A (Normal, Common)

No Items CH1 CH2 Remarks

1 Channel +5V +24.0V 2 Connector pin CON 3 CON 3

5V PIN : 11, 12 24V PIN : 2, 3, 4 GND PIN : 8, 9 GND PIN : 6, 7

3 Rated Output +5V

5% +24V 5%

(4.75 ~ 5.25V) (20.4 ~ 27.6V) 4 Max. Output current 0.8A 2.0A 5 Peak Loading current 1.0A 2.5A 1ms 6 RIPPLE NOISE Voltage 100mVp-p or less 500mVp-p or less 7 Maximum output 4W 24W 8 Peak output 5W 48W 1ms 9 Protecttion for loading

shorage and overflowing current

No Items CH1(+5V) CH2(+24V) System

1 Stand-by 1.0 A 0.4 A AVG : 55 Wh 2 PRINTING 1.0 A 2.0 A AVG : 250 Wh 3 Sleep-Mode 0.8 A 0.4 A AVG : 10 Wh

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- Environment Condition . Operating temperature range : 0 40 . Maintaining temperature range : -20 40 . Preserving Humidity Condition : 10% ~ 90% RH . Operating atmospheric pressure range : 1atm

- EMI Requirement : CISPR ,FCC, CE, MIC,

- Safty Requrement : IEC950 UL1950, CSA950, C-UL,Semko, EK,CB, CCC(CCIB),GOST, EPA, Power Save

3.2.6 HVPS board (High V oltage Power Supply)

The HVPS board creates the high voltage of THV/MHV/Supply/Dev and supplies it to the developer part for making best condition to display the image. The HVPS part takes the 24V and outputs the high voltage for THV/MHV/BIAS, and the outputted high voltage is supplied to the toner, OPC cartridge, and transfer roller.

1) Transfer High Voltage (THV+)

- Input Voltage : 24 V DC ° 15%

- Out Voltage : Max. +1.3KV ° 15% (Cleaning,200 )

- Out Voltage Trigger : 6.5

- Input Voltage Variation : 5 % below(Variation 21.6V°≠26.4V)

Load Variation : % below

- Out Voltage Rising Time : 100 ms Max

- Out Voltage Falling Time : 100 ms Max

- Transfer Variation Voltage on Environment Variation : +650 V(Duty 10%) ~ 5KV (Duty 90%)

- Control Method on environment : THV-PWM ACTIVE,transfer Active signal, of environment sensing

voltage is input and get feed back current, and recalculate it to resistence .

- Control method on transfer output voltage : It is controlled by changing its duty of THVPWM Signal as

follows. 10% Duty : +650V, 90% Duty : +5KV 5%

2) Charge Voltage (MHV)

- Input Voltage : 24 V DC 15%

- Out Voltage : -1.3KV ~ 3.2%

- Out Voltage Rising Time : 50 ms Max

- Out Voltage Falling Time : 50 ms Max

- Out Voltage Range : 30 ~ 1000

- Output Control Signal(MHV-PWM) : CPU is HV output when PWM is Low

3) Developing Voltage (DEV)

- IInput Voltage : 24 V DC 15%

- Output Voltage: -350V 4.6%

- Output Voltage Fluctuation range: PWM Control

- Input contrast of the output stability degree : 5 % or less

- Loading contrast : 5 % or less

- Output Voltage Rising Time : 50 ms Max

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- Output Voltage Falling Time : 50 ms Max

- Output Loading range : 10MßŸ ~ 1000

- Output Control Signal (BIAS-PWM) : the CPU output is HV output when PWM is low.

4) Supply

- Output Voltage : -550 V 8.6%(ZENER using, DEV )

- Input contrast of the output stability degree : under 5 %

- Loading contrast : 5 % or less

- Output Voltage Rising Time : 50 ms Max

- Output Voltage Falling Time : 50 ms Max

- Output Loading range : 10 ~ 1000

- Output Control Signal (BIAS-PWM) : the CPU is HV output when PWM is low.

MHV

OPC

DEV

THV

Supply

CN3

LED1

(Error LED)

CN1

LED2

(Toner Save LED)

Switch

Micro Switch

Input

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3.2.7 FUSER AC POWER CONTROL

Fuser(HEAT LAMP) gets heat from AC power. The AV power controls the switch with the Triac, a semiconductor switch. The 'ON/OFF control' is operated when the gate of the Triac is turned on/off by Phototriac (insulting part). In other words, the AC control part is passive circuit, so it turns the heater on/off with taking signal from engine control part. When the 'HEATER ON' signal is turned on at engine, the LED of PC1 (Photo Triac) takes the voltage and flashes. From the flashing light, the Triac part (light receiving part) takes the voltage, and the voltage is supplied to the gate of Triac and flows into the Triac. As a result, the AC current flows in the heat lamp, and heat is occurred. On the other hand, when the signal is off, the PC1 is off, the voltage is cut off at the gate of Triac, the Triac becomes off, and then the heat lamp is turned off.

1) Triac (THY1) feature :16A, 600V SWITCHING

2) Phototriac Coupler (PC3) . Turn On If Current : 16mA . High Repetive Peak Off State Voltage : Min 600V

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3.3 S/W Structure and Descriptions

The purpose of this document is to describe the design specification of the Engine Control F/W for the ML-1610.

3.3.1 Introduction

This Engine Control Firmware is a program that controls LBP Engine of the ML-1610. This firmware is executed every 10msec as an interrupt routine of the main system. At stand-by state, this firmware monitors the enable print command from the main system. If the enable print command is detected, this firmware controls the Engine Mechanism according to the printing process and paper feeding state. And with the Sleep command or Wake-Up command, this firmware controls the Engine state.

3.3.2 Engine Control F/W Overview

Engine Control F/W is executed every 10msec by timer interrupt of main system. And it consists of 3 control modules.

- Engine Main Control, Interface Control and Sensing & Unit Control Module.

Major operations of the Engine Control F/W are following.

- Control the Pick-Up, Feeding and Discharging of Paper

- Control the LSU

- Control the HVPS for the Developer Process

- Control the Temperature of Fixing unit

Controlling selection to here is added.

- Second Cassette Feeder(SCF) : N/A

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- Architecture of Engine Control F/W

Main F/W of the printer controller

Device Units

Fixing Unit

LSU

HVPS

Fan Unit

Motors

Solenold &

Clutch

Power On

Initial

Interface Control Module

Engine Main Control Module

Sensing & Unit Control Module

Hardware Devices

& Mechanical Device

Engine F/W

+ 93 hidden pages

Samsung ML-2010 Service manual

Contents

1.1 Safety Warning

1.2 Safety Caution

1.3 ESD Precautions

3.1 System Outline

3.2 H/W Structure and Descriptions

3.3 S/W Structure and Descriptions