ml-2240 & ml-2245 & ml-1640 series training february...
TRANSCRIPT
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. 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 Product5-2. 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.