ML-2240 & ML-2245 & ML-1640 Series trainingFebruary 2008

ML-2240 & ML-2245 & ML-1640 Series trainingFebruary 2008

AgendaAgenda

1. Overview2. Block & Connection Diagram3. Schematic – Key concept4. Cover Open Sensing5. Q&A

Ⅰ. Introduction

Main BoardSMPS

1-1. Overview(ML–2240 & ML-2245)

HVPS

Waste Sensor(Only ML-2245)

Ⅰ. Introduction1-2. Overview(ML–1640)

Main BoardSMPS

HVPS

Ⅰ. Introduction2. Block & Connection Diagram of ML-2240 & 2245

Ⅰ. Introduction2-2. Block Diagram of ML-1640

Ⅰ. Introduction3. Schematic - Key Concepts

3-1. Main PBA – 1(ML-2240&2245)

Main Clock and SSCG

SSCG means Spread Spectrum Clock GeneratorApply SSCG(Spread Spectrum Clock Generator) on the Main Clock.Main Clock frequency is 12MHz and Video Clock is 14.75MHz. CPU makes video clock using internal PLL block. It doesn’t need extra Oscillator for video clock.

Ⅰ. Introduction

3-1. Main PBA – 2(ML-2240&2245)

CPU – Jupiter4e

Jupiter4e is developed using ARM940T 32Bit RISC embedded processor core.1.8V internal, 3.3V external(I/O boundary) Voltage used.Image processor included(GDI only).On-Chip clock genarator with internal PLL.Operating frequency is 75MHz ( converting 10MHz main clock to 75MHz operating clock using internal PLL )It has Built in Flash Memory : 4MBits (128Kx32bits)4Mbit is 0.5MByte. It is small capacity. So we can not store many function in it.

Ⅰ. Introduction

SDRAM – 8MB * 1ea

SDRAM(Max operating frequency : 133MHz) used and SDRAM has 8MByte memory capacity.SDRAM operates 75MHz which is the same as CPU’s operating frequency.F/W program code had been stored in the Built-in Flash Memory when Main PBA assembled , and the program code can be upgraded by user.When upgrading F/W, never turn off the power until completing upgrade process.If user turn off the power while upgrading F/W, the program codewill be conflicted and the machine will not work.If above situation occurs, replace the Main PBA.After downloading, set automatically conduct power off/on.

3-1. Main PBA – 3(ML-2240&2245)

Ⅰ. Introduction

EEPROM

ML-2240 has EEPROM in order to store environmental data, total page count data, dot counter data, etc…M93C66(4Kbit) EEPROM device is used.Read/Write operation is activated when the machine states go idle.While printing, Copying, scanning, EEPROM read/write operation not activated.Because of above reason, if user turn the power off right after printed page exit, there is no time for writing newer data that results dot count and page count data not updated.GroundGND

Supply VoltageVCC

Organization SelectORG

Serial Data InputDI

Serial Data OutputDO

Serial ClockSK

Chip Select InputCS

3-1. Main PBA – 4(ML-2240&2245)

Ⅰ. Introduction

Main Motor Control(BLDC)

ML-2240 drives the engine motor using BLDC Motor.BLDC Motor includes the motor driver IC and extra circuits for driving the engine motor.The main board controls only 3 signals (ex. Enable , Ready , CLK)

3-1. Main PBA – 5(ML-2240&2245)

Ⅰ. Introduction

ML-2240 has one heat lamp.Main controller has a signal to control the lamp.

Fuser Control

3-1. Main PBA – 6(ML-2240&2245)

3-1. Main PBA – 7(ML-2240&2245)

Ⅰ. Introduction

USB 1.1(Compatible with USB2.0)

ML-2240 uses internal USB1.1 in Jupiter4e.USB2.0 full speed supported.

3-1. Main PBA – 8(Only ML-2245)

Ⅰ. Introduction

Toner Waste-Sensor

ML-2245 uses Waste sensor PBA to sense remaing Toner.Developer Unit of ML-2245 is separated into Toner cartridge and Imaging Unit. (Developer Unit of ML-2245 & ML-1640 is not separated.)So remaining toner of Toner cartridge must be sensed.

Ⅰ. Introduction

3-2. Main PBA – 1(ML-1640)

Main Clock and SSCG

SSCG means Spread Spectrum Clock GeneratorApply SSCG(Spread Spectrum Clock Generator) on the Main Clock.Main Clock frequency is 12MHz and Video Clock is 20.75MHz. CPU makes video clock using internal PLL block. It doesn’t need extra Oscillator for video clock.The SSCG of the main clock has +/-0.6% spread spectrum in orderto reduce EMI.The SSCG of the video clock part has no spread because of imagequality, but still effective for reducing EMI.

Ⅰ. Introduction

3-2. Main PBA – 2(ML-1640)

CPU – Jupiter4e

Jupiter4e is developed using ARM940T 32Bit RISC embedded processor core.1.8V internal, 3.3V external(I/O boundary) Voltage used.Image processor included(GDI only).On-Chip clock genarator with internal PLL.Operating frequency is 75MHz ( converting 10MHz main clock to 75MHz operating clock using internal PLL )It has Built in Flash Memory : 4MBits (128Kx32bits)4Mbit is 0.5MByte. It is small capacity. So we can not store many function in it.

Ⅰ. Introduction

SDRAM – 8MB * 1ea

SDRAM(Max operating frequency : 133MHz) used and SDRAM has 8MByte memory capacity.SDRAM operates 75MHz which is the same as CPU’s operating frequency.F/W program code had been stored in the Built-in Flash Memory when Main PBA assembled , and the program code can be upgraded by user.When upgrading F/W, never turn off the power until completing upgrade process.If user turn off the power while upgrading F/W, the program codewill be conflicted and the machine will not work.If above situation occurs, replace the Main PBA.After downloading, set automatically conduct power off/on.

3-2. Main PBA – 3(ML-1640)

Ⅰ. Introduction

EEPROM

ML-1640 has EEPROM in order to store environmental data, total page count data, dot counter data, etc…M93C66(4Kbit) EEPROM device is used.Read/Write operation is activated when the machine states go idle.While printing, Copying, scanning, EEPROM read/write operation not activated.Because of above reason, if user turn the power off right after printed page exit, there is no time for writing newer data that results dot count and page count data not updated.GroundGND

Supply VoltageVCC

Organization SelectORG

Serial Data InputDI

Serial Data OutputDO

Serial ClockSK

Chip Select InputCS

3-2. Main PBA – 4(ML-1640)

Ⅰ. Introduction

Main Motor Control(A3983)

3-2. Main PBA – 5(ML-1640)

ML-1640 drives the engine motor using Stepping motor unlike ML-2240.A3983 is a stepping motor driver IC.A3983 has the ability control the output current which gives thesmoothing action to the motor in the starting period.But main motor can be driven forward only full-step resolution in ML-1640.

Ⅰ. Introduction

Fuser Control

3-2. Main PBA – 6(ML-1640)

ML-2240 has one heat lamp.Main controller has a signal to control the lamp.

3-2. Main PBA – 7(ML-1640)

Ⅰ. Introduction

USB 1.1(Compatible with USB2.0)

ML-1640 uses internal USB1.1 in Jupiter4e.USB2.0 full speed supported.

II. Summary of Product

3-3. SMPS PBA

The output current of 5V and 24V is- 5V : 0.7A- 24V : 1.5A (in ML-1640)

2.0A (in ML-2240,2245)On the SMPS board, Paper feed sensor exists.The capacity of one heat lamp is 600W in ML-1640 & 750W in ML-2240,2245.

AC Input

Socket

Heat Lamp Connector

Main <-> SMPS Connector

Rear Cover Open S/W

Paper Feed Sensor

ML-2240/2245

ML-1640

II. Summary of Product

3-4. HVPS PBA

Front Cover Open S/W

+1,300V-1,000V

THV

-350VDEV

-550VSUP

-1300VMHV

-100VOPC

Main <-> HVPS Connector

HVPS board supply high voltage for developing Process.High Voltage controlled by PWM signal from CPU.LEDs & tact switch exists on HVPS instead of OPE PBA.

LEDs & tact switch

Cover Open Switch

Cover Open Switch

Two cover open switches are near front cover & rear cover.If two switches open, 24VS2 for DC fan, main motor, polygon motor part of LSU and high voltage of HVPS and 5VS for LSU are cut off.And Online/Error LED emits Red light.Cut off mechanism is like below.

II. Summary of Product4. Cover Open Sensing

SMPSMain PBA

24V

Digital Switch

5V

5VS

5V

24VS1

HVPS

24VS124VS2

24VS1

24VS2

Near front cover

Near rear cover

II. Summary of Product5-1. UIEmbody UI using RED LED & 3 color LED.

3 color LED

RED LED

Cancel KEY

II. Summary of Product5-2. UI – State Diplay

ML-1640 & ML-2240 UI is same.

ML-2245 UI is diferrent from ML-1640 & ML-2240 UI.

Because Developer Unit of ML-2245 is separated into Toner cartridge & Imaging Unit.

Thank you

The END