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System Overview
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3. System Overview
This chapter describes the functions and operating principles of the main components.
3.1 System Structure
3.1.1 Main Parts of System
Service Manual Samsung Electronics
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System Overview
Cassette Feeding Method : Cassette Type Feeding Standard : Center Loading Feeding Capacity : Cassette 150 Sheets(75g/ , 20lb Paper Standard) No Manual Feeder Paper Detecting Sensor : Photo Sensor (Empty, Registration, Exit) Paper Size Sensor : None LSU(Laser Scan Unit) Consisted of LD(Laser Diode) and Polygon Motor Control. Error Polygon Motor Error Hsync Error Phenomenon The Rotation of Polygon Motor can not reach stable Though the rotation of Polygon Motor reach stable, the signal of Hsync is not occurred
2nd Transfer Ass y The life span: Print over 100,000 sheets (in 15~30 Specification: Similar to CLP-500 Series Fuser Ass y
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Heat Lamp : New Part - Knuckle Type Heat Roller : Similar to CLP-500 Series 2 Pressure Roller : One is similar to HummingBird, the Other is a new added part comparing with other Fuser Thermistor - Temperature-Measuring Device Thermostat - Critical Temperature-Detecting Device & ITB(Intermediate Transfer Belt) & 1st Transfer Roller The life span: Print over 100,000 Images The ITB unit includes 1st Transfer Roller OPC(Organic Photo-Conductor) & Developer The life span: Print over 44,000 Images (Both) Imagine Unit consists of 4 kinds of Developer , OPC, and Deve. Main Frame
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Toner Kits The life span: Color -> Initial 700 / Sales 1,000 images (ISO 19752 Standard Coverage Print-Out) Black -> Initial 1,000 / Sales 2,000images (ISO 19752 Standard Coverage Print-Out) 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. The Main Motor is similar to CLP-500 Series Main Motor.
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3.1.2 EP Process
- Structure of EP Process
P1: Image on OPC ITB Unit
Blade
P2: Image on Media
Media Path OPC
Blade ~ Developer Eraser Charger
Laser Scanning Unit
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System Overview
- System Outline
Paper path Exit Fuser Toner Cartridge Dev-Y OPC Dev-M Dev-C Dev-K ITB
LSU
Cassette
Charging Conductive Roller charging Roller resistivity : ~ 10^5 ohm-cm Applied voltage : -1.1kV Charge acceptance : -520V OPC coating thickness : 21um OPC diameter : 60mm Non eraser system 1. Organic Photoconductor is charged to uniform voltage by conductive roll charging method 2. No ozone is produced because corona is not used 3. Charger roll is cleaned with cleaning roll 4. Toner remained on OPC after T1 process is cleaned by cleaning blade and retrieved into waste toner box by auger and belt driving mechanism
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Exposing One polygon motor ( 6 facet ) Single beam LD (1ea) LD wavelength : 785nm Polygon motor rpm : 23747.5 LSU energy : 0.25uJ/cm^2 OPC exposed potential : -50V 1. Exposing is implemented by laser striking on to OPC with uniform potential 2. Laser beam is modulated according to image to be printed that is from PC 3. Latent Image is formed on OPC, which is developed with toner
Developing Non-magnetic, mono component Non-contact development Developing bias : DC + AC AC peak to peak : 1.5 ~ 2.0kV Mass on developing roller : 550 ~ 600ug/cm^2 Toner coulomb : 15 ~ 20uC/g Roller diameter : 10mm Roller resistivity : 10^5 ~ 10^6 ohm-cm Process speed ratio : 1.2 (OPC=1.0) Color order : Y -> M -> C -> K 1. Only latent image formed by exposing process is developed with toner 2. AC + DC Voltage is being used to develop toner into latent image on OPC because non-contact developing method is adopted 3. Y, M, C, and K Images are sequentially developed onto OPC and transferred onto Intermediate Transfer Belt (hereafter ITB) to form a color image on ITB 4. Toner Bottles are used to supply toner into developer compartment 5. Toner level is being sensed to control toner supply from toner bottle to developer
Transfer 1 Multi-pass transfer Indirect transfer Transfer voltage : 0.5 ~ 2.0kV (controllable) Roller diameter : 14mm Roller resistivity : ~ 10^7 ohm-cm Belt resistivity : 10^9 ~ 10^11 ohm-cm Environment sensing by Y-transfer roller Transfer unit life : 50K images 1. Developed Image on OPC is transferred onto ITB by T1 Process 2. T1 Voltage is positive which attract toner to ITB 3. 4 times of T1 process is required to make a color image on ITB, which means multi-pass process 4. ITB has a hole as a fiducial mark for timing. Engine control for color image is synchronous with it, ITB Home Sensing Signal
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Transfer 2 Indirect transfer Transfer voltage : 1 ~ 4.0kV (controllable) Roller diameter : 18.6mm Roller resistivity : ~ 10^7 ohm-cm Belt resistivity : 10^9 ~ 10^11 ohm-cm Transfer unit life : 50 K images 1. Color image formed on ITB is transferred onto media by T2 process 2. T2 voltage is also positive to get color image moved onto media 3. Toner remained on ITB after T2 process is cleaning by ITB cleaning blade and collected and 4. Transported and retrieved into waste toner box by auger and belt driving system 5. T2 Roll is engaged when color image is being transferred onto media. Otherwise it is disengaged. Clutch is used for driving T2 Roll engagement and disengagement
Fusing 3 Roll system -> short warm-up time (45sec) Post Pressure Roll 1. Color Image on media is melted down and fixed into media by fusing process
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System Overview
CN4 CN10 DEV_ ITB_ SOL CLUTCH
CN2 CN7 CN28 BLDC T2_ FUSER CLUTCH CN8 FUSER CLUTCH
CN5 DEVE_ HOME CN13 PANEL
RJ45
CN15 SMPS
USB
3.2 Main PBA Description
3.2.1 Main Controller PBA
CN16 COVER OPEN
Service Manual
CN19 HVPS
CN20 CN24 LSU 5V SWITCH
CN19 DEVE& ITB
CN20 CN24 CN25 REG& REGI PICKUP EMPTY CLUTCH
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EEPROM EEPROM 64Kbit 64Kbit CHORUSm CHORUSm Main Control Main Control SoC SoC
OSC5 OSC5 12MHz 12MHz
SDRAM
Network Network Physical Chip Physical Chip
3.2.2 Main PBA
System Overview
Flash Memory Memory
OSC2 12MHz 12MHz
OSC6 12MHz 12MHz
OSC4 25MHz 25MHz
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USB2.0 Device
USB Connector
RJ45
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System Overview
3.2.3 Main PBA Description
1) CHORUSm CHORUSm involves in itself the functions to control ARM Processor Core and various H/W devices. CHORUSm, therefore, controls Main PBA and all engine mechanism, processing the print job received from host and enabling the engine to print image. Function Process 0.13um Technology Package 496 PBGA CPU Core ARM 920T - 300MHz Cache : I-Cache 16KB, D-Cache 16KB System Bus 32-bit width, 100MHz SDRAM Controller 32-bit width, 100MHz operation 5 Banks, Up to 128MB Address space per Bank Programmable Timing to Control SDRAM A.C Characteristics Support Self Refresh for Data Retention ROM Controller 32-bit width, 4 Banks, Up to 16MB Address space per Bank Burst Capability Programmable Timing per Bank
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IO Controller 6 Channels, Up to 16MB Address space per Bank Programmable Timing per Bank DMA Controller 6 Channels General Purpose DMA HPVC Controller Hyper Printer Video Controller High Performance DMA-based Interface to Printer Engine Support Dual/Single Beam LSU, LVDS Video Output Support A3, 1200dpi UART Controller 5 Channels Indepenent Full Duplex UART Interrupt Controller Support 6 External Interrupts Support 26 Internal Interrupts Timer Controller 6 System Timers and Watch Dog Timer for S/W Trap Scanner Controller 300/400/600/1200dpi CIS/CCD Interface Color/Mono grey image, Binary image scan support 600dpi Color/Mono Copy support Image Processing for High-End MFP,Digital Copier MH/MR/MMR CODEC for Fax Scan image : A4 1200dpi processing Copy image : A4 600dpi processing MAC Controller 10/100Mbps Full IEEE 802.3 compatibility PPI Controller IEEE1284 compliant parallel port interface DMA-Based or Interrupt-Based operation GEU Controller Graphic Engine Unit for Banding support of Printer Language Scan Line Buffer, Polygon Filling CODEC Controller 2 Channels JBIG Encoding and Decoding I2C Controller 1 Channel, Operated at max frequency 400kHz RTC Controller Engine Controller LSU Control and Interface Unit 2 Channels STEP Motor Control Unit 8 Channels PWM Control Unit 8 Channels ADC Control Unit 2 Channels DAC Control Unit
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System Overview
CHORUSm (Internal Block Diagram)
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2) System Memory Block Memory saves program and video data and print jobs received from host. Its volume is 64MB with network function and 32MB without network function. It has no separate device for extension. SDRAM is used, driven at width of 32-bit and 100MHz, and controlled by memory controller built in CHORUSm. 3) Flash Memory Block Flash memory is the space used for saving program. Its volume is 4MB with network function and 2MB without network function. It has no separate device for extension. NOR type flash memory is used and accessed at 32-bit width burst, being controlled by the ROM controller built in CHORUSm. 4) USB2.0 Device Block This block supports USB2.0 high speed (480Mbps). ISP1582 of Philips company is used and connected to the IO Bus of CHORUSm at 16-bit, controlled by IO controller built in CHORUSm. Through this I/O port it receives print job from host. 5) Network Block This block has 10/100Mbps wired network function and is controlled by MAC controller built in CHORUSm. It is connected to host through physical layer chip outside, and thus receives print job from host. STE100P is used for physical layer chip. 6) EEPROM Block System EEPROM is controlled by the I2C controller built in CHORUSm, connected to the other non-volatile memory on I2C bus. It works at the speed of 400KHz. This system EEPROM contains all drive information and production information necessary for the operation of printer. Its size is 16k-bit. 7) OPE Control The panel is driven in the form of PIO by GPIO controller built in CHORUSm. OPE consists of one key and four monochrome LED, and one dual LED. 8) LSU Control Laser Scanning Unit is controlled by LSU controller built in CHORUSm. It makes use of all functions such as Polygon Mirror Motor Control necessary for driving LSU and Synchronized Signal Generation Control, and helps to scan laser beam on the photosensitive drum to form latent image. 9) BLDC Control It is controlled by BLDC controller built in CHORUSm. It controls the drive of printer mechanism and helps it to be driven at an equal speed. 10) Sensors Control GPIO controller built in CHORUSm collects the status of all sensors. According to this status of sensors, it controls printer mechanism to help normal printing. There are sensors such as Paper Empty Sensor, Registration Sensor and Developer Home Sensor, etc.
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System Overview
11) Clutches Control GPIO Controller built in CHORUSm controls all clutches, which help printer to do print job normally. There are clutches such as Paper Pick-up Clutch, Registration Clutch, Developer Home Clutch, ITB Clutch, T2 Clutch, Fuser Clutch, Developer Toner Supply Clutch, etc. 12) PWM Control PWM Controller built in CHORUSm controls the parts that require PWM for normal printing, such as BLDC drive speed and HVPS high voltage level, etc. 13) ADC Control It is controlled by ADC Controller built in CHORUSm, and is used for perception of charged voltage and current, 1st and 2nd transfer voltage and current, fusing temperature, used-up toner and toner amount, and interior temperature, etc. 14) DAC Control It is controlled by DAC Controller built in CHORUSm and used to set standard level of light amount of LSU Laser Diode.
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System Overview
3.2.4 SMPS(Switching Mode Power Supply) PBA
SMPS is consisted of SMPS part which supplies DC power for driving system and AC Heat Control part which supplies power to Fuser. Standard TYPE III is used. 1) DC Output Main Controller PBA, OP Panel, BLDC, Sensors, Clutches, Other PBAs 2) AC Output Fuser Unit(Heat Lamp, Thermostat) 3) Output Voltage CHANNEL V_out Load +5.0V +5.0V +/-5% MicroController, CMOS, LOGIC +24V +24.0V +15%/-10% LSU +24VF +24.0V +15%/-10% MOTOR, CLUTCH, HVPS
CON3 To Main PBA
CON2 Fuser AC
CON1 AC Input
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System Overview
3.2.5 HVPS(High Voltage Power Supply) PBA
HVPS PBA generates high voltage of charger, supply, T1 and T2 which is supplied to Developer, ensuring optimum condition for image formation. HVPS receives input of 24V and generates high voltage, supplying it to Toner, OPC, Cartridge, ITB Unit and Transfer Roller.
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System Overview
1) Charger Voltage : Charger Function: voltage that charges OPC surface up to ?500V~ -800V. Output voltage: -1.0KV ~ -2.0KV DC 3% Error type: if the voltage fails to be output to Charger Roll, OPC surface will not be charged, and the toner on the developer roller will be transferred to OPC Drum, printing black paper. 2) 1st Transfer High Voltage : T1(+) Function: voltage necessary for transferring toner developed on OPC Drum surface onto ITB. Output voltage: Max +2.0KV 3%(Duty variable, no load) ERROR type: if T1(+) output fails, the toner on OPC drum will not be transferred to ITB normally and the image will be blurred. 3) 2nd Transfer High Voltage : T2(+) Function: voltage used to transfer the toner primarily transferred on ITB again onto paper. Output voltage: Max +5.0KV 3%(Duty variable, no load) ERROR type: if T2(+) output fails, the toner on ITB will not be transferred to paper normally and the image will be blurred. 4) T2 Cleaning Voltage : Clean : T2(-) Function: prevent reverse side of paper from being dirtied, by recovering the negatively charged toner remaining at Transfer Roller and sending it onto ITB. Output voltage: with no feedback control, output fixed voltage(-1300V +/- 15%) ERROR type: reverse side of paper will be dirtied. 5) Supplying Voltage : Supply AC+DC(-) Function: voltage that makes toner to develop on the area exposed by LSU by means of potential difference, output will be the voltage of AC+DC overlapped form. Output voltage: AC 600V ~ 2000V p-p +/-1.5% DC -50V ~ -600V DC +/- 3% ERROR type: 1. if supply is GND, density will be extremely low. 2. if supply is floating (for insecure terminal contact), density will be down so slightly that it is impossible to make out with naked eyes. 6) Developing Voltage : Deve AC+DC(-) Function: voltage that supplies toner to Developing Roller Output voltage: AC 300V ~ 1700Vp-p 1.5% (supply voltage is connected to ZENER Diode 300V) DC -50V ~ -600V DC +/- 3% ERROR type: 1. if Deve is GND, density will be extremely down. 2. if Deve is floating (for insecure terminal contact), density will be extremely down.
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System Overview
3.3 CRUM
In the case of Refill Toner Install
1) Perception of Refill Cartridge (when power is on or the cover is closed) End of Life / life span data initialization -> judge to be Refill Cartridge End of Life / life exhausted (simple refill) -> stop printing caused by life exhaustion 2) Operating It is impossible to control appropriate development parameters, for there s no toner specification data. It runs with the setting of default development parameter. (Image quality will be degraded, for the lack of appropriate respond to the change of time and environment.) 3) Service Response It is possible to response appropriately, for the information of cartridge life is saved at Back Up Area.
Process after CRU life expiration
1) Record the information of End of Life. 2) Copy the information of Operating Area into Back up Area. 3) Write-Protect Back up Area. 4) Clear some information of Operation Area. -> Supplier/Model Name/MFC date/Serial Number (Manufacture Information) -> Let cartridge refiller initialize manufacture information and life span information.
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System Overview
CRUM Position
Cap Agitator Washer Bottle Cap- CRUM
Agitator Seal
CRUM Coupling
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3.4 General Description
This chapter is the product specification for the CLP-300 Series. The CLP-300 Series is a Color Laser Printer. The CLP300 Series series can be expanded to multi functional printer (MFP). CLP-300 Series is developed for two target users. Those are small office users who sometimes need color printouts, and medium business users who mainly use B/W printouts. The main product concept is "the world smallest and lightest color laser printer". This model has 16ppm B/W print-speed and 4ppm color print-speed, 2400 x 600 dpi class (optical 600 x 600 dpi) color laser printer.
3.4.1 Controller
-The video controller board is located on the right side of the printer. -Basic Memory is 32 Mbytes SDRAM. -Field F/W upgradeable FLASH ROM firmware for controller, 1024 byte EEPROM -Printing Resolution : Native 600 x 600 dpi standard Resolution can be enhanced up to 2400 x 600 dpi class, 1200 x 600 dpi (default), 600 x 600 dpi
3.4.2 Processor
CHORUSm (300Mhz), Proprietary SOC
3.4.3 Printer Language Emulations
SPL-Color
3.4.4 Memory
The controller has 32 MB SDRAM and 4 MB flash ROM on Board.
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System Overview
3.4.5 Interfaces
The system supports the following standard interfaces: One USB port - USB v.2.0 compliant - Color-coded to meet WHQL requirements, connector must be Pantone 426C One 10/100 BaseT network connector - The printer supports an internal Network Interface that can be installed pre-configured on the video controller board at the factory. This supports all of the major Network Operating Systems such as the Novell NetWare, TCP/IP, etc. Details of the network specification will be provided separately.
3.4.6 Control Panel
No LCD, 2 keys and 6LEDs
3.4.7 Periodic Replacing Parts
Samsung shall specify parts requiring replacement and the frequency of replacement. The parts identified may be deemed customer replaceable parts. Periodic replacement parts shall be recommended as follows Item(s) Black toner cartridge Color toner cartridge Pages Printed Approx. Initial : 1,500 pages* Sales : 2,000 pages* Approx. Initial : 700 pages* Sales : 1,000 pages* Approx. 20,000 black pages or approx. 12,500 color pages Approx. 5,000 images** or Approx. 1,250 pages (fulll color standard image) Approx. 50,000 pages Approx. 100,000 black pages or 50,000 color pages Approx. 100,000 pages Approx. 60,000 black pages or 15,000 color pages Part number CLP-K300A CLP-C300A:Cyan CLP-M300A:Magenta CLP-Y300A:Yellow CLP-R300A CLP-W300A Contact a service representative Engineer Replacement Remark User Replacement
Imaging unit Waste toner container Pick-up roller Fuser unit T2 roller ITB
* Average A4-/letter-sized page count based on ISO 19752 Standard coverage of individual colors on each page. Usage conditions and print patterns may cause results to vary. ** Image counts based on one color on each page. If you print documents in full color (Cyan, Magenta, Yellow, Black), the life of this item will be reduced by 25%.
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3.4.8 Power Switch
The Switch is located at rear-side of printer and must be marked to indicate on and off.
3.4.9 Operator Panel
LCD: None KEY: 2 keys (Stop, Black only) LED: 6 LEDs (C, M, Y, K Toner, Status, Black only)
3.4.10 Sensor
Paper empty (Cassette)
3.4.11 CRUMS
The CLP-300 Series engine will be equipped with electronics that can read and write data into NVRAMs otherwise known as CRUMs that reside within 1) C, M, Y, K Toner cartridges and 2) Imaging kit(Developer, OPC, ITB). The CRUM has a company ID, and Samsunga electronics logo. The toner CRUM also identifies the type of toner cartridge (Standard or High Capacity). The CRUMs contain fixed data such as the low warning point, specified life point, and hard stop point (on toner, not on IBT unit) and also store the current life count (pages count, pixels count, images count) and % of usage (gas gauge) data.
3.4.12 LOW / OUT Behavior for consumables
The consumable low and out behavior on CLP-300 Series engine is specified by SEC.
FP message Toner Imaging Kit Fuser T2 Roller Pick-up
Device for life end detection CRUM CRUM No No No
Law(90%) Yes Yes Yes Yes No
Life(100%) Yes Yes Yes Yes No
Hard stop Yes(115%) No No No No
Reset to 0 No No Yes Yes No
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