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Summary of product
4
4. Summary of Product
This chapter describes the functions and operating principal of the main component.
4.1 Printer Components
4.1.1 Front View
Document Guides
Automatic Document Feeder
Document Cover
Document Input Tray
Document Glass Document Output Tray Control Panel
Front Cover Paper Output Extension Paper Tray Bypass Tray Paper Level Indicator
WorkCentre PE16
Service Manual June 2003
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Summary of Product
4.1.2 Rear View
Rear Cover
Rear Output Slot (Face up)
Power Switch AC Power Cord Connector
Parallel Connector USB Connector
Telephone Line Connector
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4.1.3 Control Panel
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WorkCentre PE16
Adjusts the brightness of the documents for the current copy job.
Selects the document type for the current copy job.
1
C O P Y Allows you to use special copy features, such as Clone, Collation, Auto fit, 2-side, N-up (multiple pages on a sheet) and Poster copying. Makes a copy smaller or larger than the original.
Selects the number of copies.
Displays the current status and prompts during an operation.
2
Turns on when the toner cartridge is empty.
Scrolls through the options available for the selected menu item.
Confirms the selection on the display.
Enters Menu Mode and scrolls through the menus available.
3
Sends you back to the upper menu level.
Stops an operation at any time. In Standby Mode, clears/cancels the copy options, such as the contrast, the image setting, the copy size and the number of copies. Starts a job.
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Service Manual June 2003
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Summary of Product
Dials a number or enters alphanumeric characters.
4
Adjusts the resolution of the documents for the current fax job.
Allows you to send a fax to multiple destinations.
5
F A X Allows you to store frequently-dialed fax numbers using a one or two-digit speed dial or group number for automatic dialing and edit the stored numbers. Allows you to print a Phonebook list.Redials the last number in Standby Mode or inserts a pause into a fax number in edit mode. Engages the telephone line.
6
S A V E
Allows you to save on toner by using less toner to print a document.
Allows you to save on call costs by sending a fax at a preset toll-saving time. Using this feature, you can take advantage of lower long distance rates at night, for example.
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4.2 System Layout
4.2.1 Feeding section
There is a universal cassette, which supplies paper to the machine, and the manual feeder, which supplies paper one by one. The cassette has the friction pad, which separates paper one by one and prevent multisheet feeding. There is a sensor to detect the existence of paper in the cassette. - Feeding Method: Universal Cassette Type - Feeding Standard: Center Loading - Feeding Capacity: Cassette-250 sheets (80g/m2, 20lb paper standard) Manual 1 sheet (Paper, OHP, Envelope, etc.) - Paper detecting sensor: Photo sensor - Paper size sensor: None
4.2.2 Transfer Ass'y
It consists of the PTL (pre-transfer lamp) and the Transfer Roller. The PTL sends a light to the OPC drum, making the current on the drum surface to low and improves the transfer efficiency. The transfer roller transfers toner from the OPC drum surface to the paper. - Life span: 60,000 sheets (in 15~30°C)
4.2.3 Drive Ass'y
- It is motor driven gear unit, which drives the feeding unit, the fusing unit, and the distributing unit
4.2.4 Fuser
- The fuser consists of the Heat Lamp, Heat Roller, Pressure Roller, Thermistor, and Thermostat. It melts the toner to the paper with pressure and a heat to complete the printing job.
4.2.4.1 Thermostat
The thermostat is a temperature-sensing device, which cuts off the power to prevent overheating or a fire when the heat lamp or the heat coil of the heat roller becomes too hot.
4.2.4.2 Thermistor
The Thermistor detects the surface temperature of the heat roller and it maintains the regular temperature of the heat roller by responding to the information of the heat roller's temperature.
4.2.4.3 Heat Roller
The heat roller transfers the heat from the heat lamp coil to the surface of the paper. The melted toner cannot stick to the Teflon coated heat roller.
4.2.4.4 Pressure roller
The pressure roller mounted right under the heat roller is made of the silicon resin. The toner fuses onto the paper when it passes between the heat roller and the pressure roller.
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Service Manual June 2003
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4.2.4.5 Safety Relevant Facts
· Protecting device when overheating - 1st protecting device: H/W cuts off when detecting an overheating - 2nd protecting device: S/W cuts off when detecting an overheating - 3rd protecting device: Thermostat cuts off the power · Safety device - The power to the fuser is cut off when the front cover is open. - The overheating safety device for the customer safety. - Maintains the surface temperature of the Fuser Cover below 80°C. A customer caution label is attached on the inside of the rear cover.
4.2.5 Scanner
It reads an image with a photosensitive sensor. It consists of a CCD module, Connection board, ADF board , AFE (Analog Front End), and Image Processor (Located in CPU), platen glass and ADF.
· CCD Module Specification
1.Resolution: 600dpi/A4 2.Maximum scan wide: 8.5" 3.Color filter: Red, Green, Blue 4.Output channel: 3 channels (R, G, B) 5.Effective pixel: 5,400 pixel *3 6.Voltage: 24V & 5V 7.Pre-heating time: Maximum 30 seconds (70% of light reach to it) 8.The life span of a lamp: 30,000 hours (25oC)
· Image Processor Specification
1.Operating frequency: 66MHz 2.Image sensor interface: 200/300/600 dpi CIS or CCD 3.Line time: Copy, FAX, Binary (Lineart, Halftone) PC Scan: 1.5ms/Line Color PC Scan (Grey, 256 Color, True Color): 4.5ms/Line 4.A/D conversion: 10bit conversion
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4.2.6 LSU (Laser Scanner Unit)
The LSU unit is controlled by the video controller. It scans the video data received from video controller with laser beam by using a rotating polygon mirror to create the latent image on the OPC drum. The OPC drum rotates as the same speed as the paper feeding speed. When it hits the corner of the polygon mirror, it generates the /HSYNC signal. The CPU forms the left margin of the image using this signal. After detecting the /HS YNC signal, the image data is sent to the LSU to arrange the its left margin on the paper. Each surface of the polygon mirror provides one line for scanning.
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Service Manual June 2003
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4.2.7 Toner Cartridge
By using the xerographic process, it creates a visual image. The Toner Cartridge contains the OPC Drum, developer and toner components in one unit. The OPC unit contains the OPC drum and charging roller. The developer unit contains 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: 3,000 sheets (IDC Pattern/A4 standard) - 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.
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4.3 Main PBA
It is the functional center of the product. It controls the basic machine operations including the fax, scan, printer operations, sensor detection and power levels.
SDRAM
FLASH MEMORY
MODEM
74LVX161284
ASIC
SUPER1284
BUFFER
(INVERTER)
EXPANSION I/O
(HCT273)
MODEM CLOCK
MOTOR DRIVE IC
CN13 U41 U10
U11 U41 CN14
U16
U63
OSC2
U64 U15 U9 U58
U48
U43/ U68
U44/ U69 CN1 CN2
U47 OSC3 U74
CN4 U75/ U95/ U123 CN10 U115 CN8 CN7 CN9 U118 U113/U114 OSC5
CN12
CN3
CN5
U125
U135
U134
U68
CN6
U120
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Summary of Product
4.3.1 ASIC
Samsung's S3C46Q0X 16/32-bit RISC micro controller is designed to provide a cost-effective, low power, small die size and high performance micro-controller solution for MFP. The S3C46Q0X is developed using ARM7TDMI core, 0.18(m CMOS standard cell, and memory cell.
·Main function block
· 1.8V internal, 3.3V external (I/O boundary) microprocessor with 4KByte Cache · Image Processor · On-chip clock generator with PLL · Memory & External Bank Control · DMA Control (5-channel) · Interrupt Control · 2-port USB Host /1- port USB Device (ver 1.1) Interface Control · Parallel Port Interface Control · UART (2 Channel) · Synchronous Serial Interface Control · Timer (4 Channel) · Watch Dog Timer · Power control: Normal, Slow, Idle, Stop and SL_IDLE mode · A/D Converter (10-bit, 2 Channel) · General I/O Port Control · Print Head Control · Carrier Motor Control · Paper Motor Control · Tone Generator · RTC with calendar function · S/W Assistant function( Rotator )
4.3.2 Flash Memory
It stores the system program and downloads the system program through the PC interface. · Capacity : 0.5 M Byte · Access Time : 70 nsec
4.3.3 SDRAM
It is used as a buffer, system working memory area, etc. while printing. · Access Time : 60 nsec
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4.3.4 Sensor input circuit
1) Paper Empty Sensor
The Paper empty sensor (Photo Interrupter) on the engine board informs the CPU as to whether the cassette is empty or not with operation of the actuator. When the cassette is empty, it detects the fact by reading the D0 Bit of CPU. It highlights this by selecting the second LED(yellow) among the panel LEDs.
2) MP Sensing
The MP Sensor (Photo Interrupter) on the engine board informs the CPU as to whether the MP is empty or not. It reads the D0 Bit of CPU to recognize paper in MP, and the paper is fed from MP if present.
3) Paper Feeding
When paper passes the actuator (feed sensor part), it detects the signal of Photo interrupter, informs the paper feeding state to the CPU, and then sends the image data after a certain time. If it doesn't detect the feed sensor within 1 sec. after paper is fed, paper Jam0 occurs (Red and Yellow will be turned on among the OP panel LEDs), and whether the developer is inserted or not is detected with the same principle. After the developer is mounted, the actuator is operated. The signal from the photo interrupter is detected when it is passing the actuator of the sensor part. That process is called developer ID sensing.
4) Paper Exit Sensing
The system detects the paper going out of the set with the exit sensor assembled to the actuator attached to the frame. Paper detects the on/off time of exit sensor, and the normal operation or jam information is passed to the CPU. The paper JAM2 is informed.
5) Cover Open Sensing
The Cover open sensor is located on the front cover. After the front cover is opened, +24V (DC fan, solenoid, main motor, polygon motor part of LSU, HVPS), which is supplied to the each unit, is cut off. The cover-open sensing is operated by the D0 bit of CPU, and the developer ID sensing is operated.
6) DC FAN / SOLENOID Driving
It is driven by transistor and controlled by D6 bit of CPU. When it is high, the fan is driven by turning on the TR, and it is off when the sleep mode is selected. There are two solenoids, and they are driven by the paper pick-up and MP signal. Its drive time is 300ms. The diode protects the driving TR from the noise pulse, which is emitted when the solenoid is de-energizing.
7) Motor Driving
The motor driving circuit is formed when the Driver IC is selected. The A3977 (Motor driver IC) is used in this case. The resistance Rs value of sensing and the voltage value of the V reference can be changed by the motor driving voltage value.
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Service Manual 4-11 June 2003
Summary of Product
4.4 SMPS & HVPS
The SMPS supplies the DC power to the system. It takes 110V/220V and outputs the 5V, 12V and 24V to supply the power to the main board and ADF board. The HVPS part creates the high voltage of THV/MHV/Supply/Dev and supplies it to the developer part for making the 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.
COVER OPEN SWITCH PAPER-EMPTY SENSOR
MANUAL SENSOR
DEV
FEED SENSOR
SUPPLY
MHV OPC
F2 110V : 125V/3A 220V : 250V 2A H
CN3 (FAN CON.)
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F1 110V : 125V/8A 220V : 250V T 5A H
CN1 (H/L CON.)
EXIT SENSOR
MAIN PBA CON.
F101 250V L2A
THV
WorkCentre PE16
Summary of product
4.4.1 HVPS(High Voltage Power Supply)
1) Transfer High Voltage (THV+)
- Function : Voltage to transfer developed toner on OPC drum to a paper. - Output voltage : +1300V DC±20V - Error : If THV (+) doesn't output, a ghost status (same character is printed after one cycle (76mm) of OPC) with a low density occurs due to a toner on OPC drum cannot normally transfer to a paper.
2) Charge Voltage (MHV)
- Function : It is a voltage to charge entire surface of OPC with -900V ~ -1000V. - Output voltage : -1550V DC ± 50V - Error : If MHV doesn't output, a black paper is printed out because toner on developing roller moves to OPC drum due to the surface of OPC not being charged.
3)Cleaning Voltage (THV-)
- Function : It removes a dirty on a surface by sending a minus toner in a transfer roller to an OPC drum to recover toners. - Output Voltage : +300V/-150V - Error : Toner contamination occurs at the backside of a printed-paper.
4) Developing Voltage (DEV)
- Function: It is a voltage to develop a toner with using a difference of electronic potential on an exposed part by LSU (Laser Scanning Unit). * Generally, the electronic potential of exposed OPC is -180V and exposed developer is -350V when printing, so toner with minus (-) is developed on an exposed part. - Output voltage: -430V DC ± 20V - Error: 1. If DEV is GND, a density is going significantly down. 2. If DEV is floating due to instable contacting point of terminal, and etc., a density is significantly going up.
5) Supply Voltage (SUP)
- Function: It is a voltage to supply toner to a developing roller. - Output voltage: : -630V DC ± 50V (Use ZENER, DEV Gear) - Error: 1. If SUP is GND, a density is dramatically going down. 2. If SUP is floating due to instable contacting point of terminal, and etc., a density is significantly going down as much as it cannot be recognized with eyes.
WorkCentre PE16
Service Manual 4-13 June 2003
Summary of Product
4.4.2 SMPS(Switching Mode Power Supply)
It is the power source for the whole system. It is an independent module, so it is possible to use for common use. It is mounted at the bottom of the set. It is consisted of the SMPS part, which supplies the DC power for driving the system, and the AC heater control part, which supplies the power to fuser. SMPS has four outputting channels (+5V, +12V, +12Vand +24Vs). There are three kinds of power, 120V exclusive (America), 220V exclusive (Europe), and 220V for china (nations with instable power supply).
1) AC Input
- Inputting rated voltage : AC 220V ~ 240V AC 100~127V - Inputting voltage fluctuating range : AC 198V ~ 264V AC 90V ~ 135V - Rated frequency : 50/60 Hz - Frequency fluctuating range : 47 ~ 63 Hz - Inputting voltage : Under 4.0Arms/2.0Arms (The state when lamp is off or rated voltage is inputted/outputted)
2) Rated Power Output
NO 1 2 Item Channel name CONNECTOR PIN CH1 +5V CON 2 3.3V PIN: 3, 4 GND PIN: 5, 6 +5V ± 5% (4.75 ~ 5.25V) 1.0 A 150mVp-p 7.5W CH2 +12V CON2 5V PIN : 8 GND PIN: 7 +12V ± 5% (11.4 ~ 12..6V) 0.05A 150mVp-p 0.6W CH3 +24.0V CON2 24V PIN: 13, 16 GND : 9, 10 +24V ± 10% (21.6 ~ 26.4V) 1 0A 500mVp-p 36.0W CH4 +24.0VS CON2 24V PIN: 11, 12 GND : 18 +24V ± 10% (21.6 ~ 26.4V) 0.5 500mVp-p 24.0W
3 4 5 6
Rated outputting voltage Rated outputting current Ripple noise voltage Maximum output
3) Consumption Power
NO 1 2 3 Item Stand-By PRINTING Sleep-Mode CH1 (+5V) 1.0 A 1.5 A 0.3A CH2 (+12V) 0.05A 0.5A 0.0A CH3 (+24V) 1.0 A 1.5 A 0.0A CH3 (+24VS) 0.5 A 1.0 A 0.06A System AVG : 95 Wh AVG : 350 Wh AVG : 20 Wh
4) Length of Power Cord : 1830 ± 50mm 5) Power Switch : Use
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6) Feature
Insulating resistance : over 50M (at DC500V) Insulating revisiting pressure : Must be no problem within 1min. (at 1500Vzc, 10mA) Leaking voltage : under 3.5mA Running voltage : under 40A peak (at 25°c, Cold start) Under 60A peak (in other conditions) Rising Time : Within 2Sec Falling Time : Over 20ms Surge : Ring Wave 6KV-500A (Normal, Common)
7) Environment Condition
Operating temperature range : 0°c ~ 40°c Maintaining temperature range : -25°c ~ 85°c Maintaining humid range : 30% ~ 90% RH Operating atmospheric pressure range : 1
8) EMI Requirement : CISPR ,FCC, CE, MIC, C-Tick, 9) Safety Requirement
- IEC950, C-UL, TUV,Semko,iK,CB, CCC, EPA,
4.4.3 Fuser AC Power Control
Fuser (HEAT LAMP) gets heat from AC power. The AC 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 Photo triac (insulting part). In the 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 blinking 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
- 12A,600V SWITCHING
2) Phototriac Coupler (PC3)
- Turn On If Current : 15mA ~ 50mA(Design: 16mA) - High Repetive Peak Off State Voltage : Min 600V
WorkCentre PE16
Service Manual 4-15 June 2003
Summary of Product
4.5 Engine F/W
4.5.1 Feeding
If feeding from a cassette, the drive of the pickup roller is controlled by controlling the solenoid. The on/off of the solenoid is controlled by controlling the general output port or the external output port. If feeding from a manual feeder, insert the paper according to the operation of the manual sensor, and by driving the main motor, insert the paper in front of the feed sensor. While paper moves, occurrence of jam is judged as below. (Refer to the [6.2 Paper Transfer rout])
4.5.1.1 Jam 0
· After picking up, paper cannot entered due to paper didn't feed. · After picking up, paper entered but it cannot reach to the feed sensor in certain time due to slip, etc. · After picking up, if the feed sensor is not on, repack up. After repacking up, if the feed sensor is not on after certain time, it is Jam 0. - It is a status that the leading edge of the paper doesn't pass the feed sensor. · Even though the paper reaches the feed sensor, the feed sensor doesn't turn on. - It is a status that the leading edge of the paper already passes the feed sensor.
4.5.1.2 Jam 1
· After the leading edge of the paper passes the feed sensor, the trailing edge of the paper cannot pass the feed sensor after certain time. (The feed sensor cannot be Off) · After the leading edge of the paper passes the feed sensor, the paper cannot pass the exit sensor after certain time. (The exit sensor cannot be On) - The paper exists between the feed sensor and the exit sensor.
4.5.1.3 Jam 2
· After the trailing edge of the paper passes the feed sensor, the paper cannot pass the exit sensor after certain time.
4.5.2 Drive
By gearing, the main motor drives the rollers such as feeding roller, developing roller, fuser roller, and distributing roller. The step motor is controlled for the sections, acceleration section and fixed speed section. In the initial stage of the motor run, appoint the acceleration section to prevent the isolation of the motor. It is controlled by the A3977 motor driver IC. The step signal and the enable signal are sent to make the phase for driving the motor in CPU.
4.5.3 Transfer
The charging voltage, developing voltage and the transfer voltage are controller by PWM (Pulse Width Modulation). The each output voltage is changeable due to the PWM duty. The transfer voltage admitted when the paper passes the transfer roller is decided by environment recognition. The resistance value of the transfer roller is changed due to the surrounding environment or the environment of the set, and the voltage value, which changes due to the environments, is changed through AD converter. The voltage value for impressing to the transfer roller is decided by the changed value.
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4.5.4 Fusing
The temperature change of the heat roller's surface is changed to the resistance value through the thermistor. By converting the voltage value to a digital value, through the AD converter, the temperature is decided. The AC power is controlled by comparing the target temperature to the value from the thermistor. If the value from the thermistor is out of the controlling range while controlling the fusing, the error stated in the table occurs.
4.5.4.1 Error Type
Error Open heat error Lower heat error Description When warming up, it has been lower than 68 °C over 25 sec · Standby: It has been lower than 100°C over 25 sec · Printing: - 2 consecutive pages: it has been lower than 145°C over 5 sec - 3 consecutive page; it has been 40°C lower than the fixed fusing temperature over 4 seconds. It have been higher than 220°C over 3 seconds
Over heat error
4.5.5 LSU
The LSU is consists of the LD (Laser Diode) and the polygon motor control. When the printing signal occurs, it turns the LD and drives the polygon motor. When the receiving light part detects the beam, Hsync occurs. When the polygon motor speed becomes normal, LReady occurs. If the two conditions are satisfied, the status bit of the LSU controller register becomes 1, the LSU is ready. If the two conditions are not satisfied, the error shown in below occurs.
Error Polygon motor error Hsync error
Description When the polygon motor's speed doesn't become normal The polygon motor's speed is normal, but the Hsync signal is not created.
WorkCentre PE16
Service Manual 4-17 June 2003
Summary of Product
4.6 LIU PBA
LIU board is a Line interface unit, and it is a circuit for interfacing a telephone line with a modem. The circuit is consisted of matching transfer to conform to impedance of a receiving telephone line and a circuit to conform to impedance of a modem. Also, there is a ring detect circuit to detect a ring signal from a switchboard and a surge absorber to protect it from an external high voltage supply applied to a line input unit.
Ring Detect Circuit (PC814)
Relay
Tel-Line Jack Surge Absorber
4.7 OPE PBA
OPE board is consists of various function keys and LCD to display an operation of key. MICOM creates a circuit with using HT48R50 MICOM of HOLTEC CO. and applies LED and LCD. A communication method with a CPU of a main board is UART, and related signals are /Reset, TXD, and RXD.
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