Page 1 B282-69/B283-69 Service Training Draft start – 27 June 2011 Final released – 7 July 2011...
Page 2 Course Contents 1 Product Outline 12 Transfer and Separation 2 Specifications 13 Drum Cleaning 3 Installation 14 Paper Feed 4 Machine Overview 15 Fusing 5 PM 16 Duplex 6 Scanner 17 ADF 7 Image Processing 18 ARDF 8 Laser Exposure 19 Paper Tray 9 PCU 20 Troubleshooting...
Page 3: Service Training
B282-69/B283-69 Service Training 1. Product Overview No additional notes.
Page 4 The Machine – Overall 1. ARDF, ADF, or 7. Operation switch Exposure glass cover (options) 2. Exposure glass 8. Control panel 3. Internal tray 9. Front cover 4. Ventilation holes 10. Paper tray 5. Main power switch 11. Paper tray unit 6.
Page 5 The Machine – Right Side B283-69 B282-69 Duplex unit 1. By-pass tray 2. Right cover 3. Lower right cover No additional notes.
Page 6: Operation Panel
Operation Panel 1. Function keys 11. Duplex key 2. Indicators 12. ID copy key Familiarize yourself with the 3. Display panel 13. Sort key operation panel. 4. Selection keys 14. Image density keys See the operating instructions 5. Scroll keys 15.
Page 7 Standard Components B283-69 Mainframe B282-69 Mainframe •Copy/Printer/Twain Scanner •Copy/Printer/Twain Scanner •16MB Memory •Duplex •16MB+32MB memory (w/o NIC model) •16MB Memory •250-sheet x1 tray •16MB+32MB memory (w/o NIC model) •100-sheet bypass tray •250-sheet x 1 tray •250-sheet output tray •100-sheet bypass tray •USB 2.0...
Page 8 Platen Cover (B406) The external optional units are shown to the ADF (B813) right. Internal option: ARDF (B814): Only for B282-69 NIB (Network interface board) 1-Tray paper bank (B385) 2-Tray paper bank (B384) Accessibility handles for standard and optional trays (B272 and B274) The following service options are also available.
Page 9 Back the paper back into the machine. Increased Copy Speed Multicopy rate has been increased for the B282-69. (18 cpm ⇒ 20 cpm) ADF 1 to 1 speed is still 18 cpm. B283-69 multicopy rate is unchanged. (18 cpm) Design Change Internal tray is blue.
Page 10 B282-69/B283-69 Service Training 2. Specifications No additional notes.
Page 11: Specifications
Specifications - 1 Copy Process Dry electrostatic transfer system Maximum Original Size: A3/11” x 17” Maximum Copy Paper Size: A3/11” x 17” Reproduction Ratios: 3 enlargement and 4 reduction Zoom 50% to 200%, in 1% steps No additional notes.
Page 12 » Not above 66.7 db Dimensions (W x D x H) B283-69: 550 x 568 x 420 mm B282-69: 587 x 568 x 460 mm » With ADF height is 510 mm. With ARDF height is 615 mm. No additional notes.
Page 13 Specifications - 3 Weight B283 - 35 kg B282 - 40 kg Warm-up Time Less than 25 seconds (at 20 C) First Copy Time Less than 6.5 seconds Toner Yield 6,000 copies (A4 LEF, 6% full black) Copy-Tray Capacity 250 sheets No additional notes.
Page 14 Specifications - 4 Optional Equipment Platen Cover Auto-document feeder Auto-reverse document feeder (B282-69 only) Paper tray unit (1 tray) Paper tray unit (2 trays) Tray heater Optics anti-condensation heater Copy Paper Weight 60 - 90 g/m (16 - 24 lb) For more details regarding the machine’s...
Page 15 B282-69/B283-69 Service Training 3. Installation No additional notes.
Page 16: Installation Procedures
Installation Procedures - 1 In the Field Service Manual, see Copier Installation. Socket for Paper Tray Unit Socket for ADF/ARDF No additional notes.
Page 17 Installation Procedures - 2 Remove all tape and padding from the machine. No additional notes.
Page 18 Installation Procedures - 3 Toner Bottle Holder Open the front door and remove the toner bottle holder. No additional notes.
Page 19 Installation Procedures - 4 Right Door PCU (Photoconductor Unit) Open the Right Door and remove the PCU (Photoconductor Unit) No additional notes.
Page 20 Installation Procedures - 5 Upper Part Lower Part Separate the PCU into the Upper Part and the Lower Part. Put a sheet of paper on a level surface and place the Upper Part on it. This is to prevent foreign material from getting onto the sleeve rollers.
Page 21 Installation Procedures - 6 Distribute a pack of developer to all openings equally. Make only a small cut in the top corner of the bag for better control when pouring. Make sure not to spill developer on the gears. If you have to turn the gear to distribute the developer evenly, make sure to do so very slowly and as little as...
Page 22 Installation Procedures - 7 Reassemble the PCU and reinstall it. Shake the toner bottle (with the cap still on). Remove the bottle cap and install the bottle on the holder (do not touch the inner cap). Set the holder (with the toner bottle) in the machine.
Page 23 Installation Procedures - 8 Pull out the paper tray. Turn the paper size dial to the appropriate size. Paper tray Adjust the positions of the end and side guides. Paper size dial No additional notes.
Page 24 Installation Procedures - 9 ARDF or ADF Platen cover Install the optional ARDF, ADF, or platen cover. Follow the appropriate procedure in the field service manual. Plug in the main power cord and turn on the main switch. Activate the SP mode and execute "Developer Initialize" (SP 2214 -1). It takes about 45 seconds.
Page 25 Inverter Tray - 1 (Duplex Model B282-69 only) Back corner edge of Inverter Tray Check that the back corner edge of the Inverter tray is fully against the back of the slot (see following slides for details). Note: This is only applicable to when making duplex copies/prints. For single- sided output, the paper doesn’t come out of the slot just above the Inverter Tray.
Page 26 Inverter Tray - 2 (Duplex Model B282-69 only) Back corner edge of Inverter Tray Correct Incorrect Position Position Lock Insure that the back corner edge of the Inverter Tray is fully against the back of the slot. If the back corner edge is away from the back (see right photo above), then duplex printing will jam (see next slide), due to paper hitting the corner edge (see previous slide).
Page 27 Inverter Tray - 3 (Duplex Model B282-69 only) Paper jam Inverter Tray Paper jam caused by protruding back corner edge of Inverter Tray Note: This is only applicable to when making duplex copies/prints. For single- sided output, the paper doesn’t come out of the slot just above the Inverter Tray.
Page 28 Options See the Field Service Manual for installation procedures for the following optional items: Platen cover, ADF, or ARDF » Only one of these may be installed. Network interface board (NIB) Two-tray paper tray (B384) One-tray paper tray (B385) Tray heaters* Anti-condensation heater (for optics)* Paper tray grip handles »...
Page 29 Set SP Modes Input the product serial number and service contact numbers. SP 5811: Serial number SP 5812: Service telephone No additional notes.
Page 30 Firmware Update In previous models of this series all firmware updates were done by flash memory card. B282-69/B283-69 memory updating is done by: Flash memory card for BICU firmware update. SD card for GDI controller update. Refer to the FSM for update procedure details.
Page 31: Service Training
B282-69/B283-69 Service Training 4. Machine Overview No additional notes.
Page 32: Upper Covers
Upper Covers Left Upper Cover Top Rear Cover Front Upper Left Cover Operation Panel Right Upper Cover The illustration shows how to remove all upper covers.
Page 33 Mechanical Component Layout The above illustration is the B282 model. The B283 model does not have the duplex unit. Refer to the notes for the component names. 1. 2nd Mirror 18. Image Density Sensor 2. Exposure Lamp 19. Registration Roller 3.
Page 34: Paper Path
Paper Path Duplex Main By-pass tray The above illustration shows how paper is transported in the machine. The B282 model has a duplex unit mounted on the right side of the machine. All models have a by-pass tray. No additional notes.
Page 35: Drive Layout
Drive Layout Scanner motor Hot roller The main motor drives Main motor the fusing unit, PCU and development unit. Locate all the drive components on your Fusing unit machine. OPC Drum Development roller Development unit For a full list of drive components, see Overview under Product Information...
Page 36 Printer control- unit board Block Diagram Fusing lamp Ther- mister This block diagram Opera- tion High BICU shows overall voltage panel P.P. machine control. ADF/ ARDF Motors See the notes for Paper tray details. Clutches unit Duplex Polygon motor Lamp stabi- Sensors Standard...
Page 37: Copy Process
Copy Process Cleaning Quenching Paper separation Drum charge Image transfer ID Sensor Laser exposure Development See the notes for copy process details. Exposure A xenon lamp exposes the original. Light reflected from the original passes to the CCD, where it is converted into an analog data signal.
Page 38 B282-69/B283-69 Service Training 5. PM (Preventive Maintenance) No additional notes.
Page 39 PM Intervals PM intervals of 60 K, 80 K, and 120 K. Main machine: 60 K and 120 K PM intervals ADF and ARDF: 80 K PM intervals (See PM Tables in the Field Service Manual.) Reset the PM counter after finishing a PM (SP 7804 1).
Page 40: Preventive Maintenance Tables
Preventive Maintenance Tables Familiarize yourself with the PM Tables. (Refer to PM Tables in the Field Service Manual for details.) Locate the PM parts on the machine It is not necessary to disassemble units such as the PCU and fusing unit at this time. You will do that later when practicing replacement and adjustment.
Page 41 B282-69/B283-69 Service Training 6. Scanner No additional notes.
Page 42: Scanner Unit
Scanner Unit 1. Exposure Lamp 2. 1st Scanner 3. Exposure Glass 4. Lens Block 5. Scanner Motor 6. Scanner HP Sensor 600 dpi CCD Exposure lamp: One xenon lamp The reflector reduces shadows on paste-up originals See the notes for more details. The original is illuminated by the exposure lamp (a xenon lamp).
Page 43: Scanner Drive
Scanner Drive Book mode: Scanner drive motor drives the scanner. Timing belts are used in this model. ADF/ARDF mode: The scanner stays at home position. The original is scanned while the ADF/ARDF feeds the sheet through. See the notes for details. A stepper motor drives the 1st and 2nd scanners [A, B].
Page 44 SP Modes SP 4008: Sub scan magnification SP 4009: Main scan magnification SP 4010: Leading edge registration SP 4011: Side-to-side registration SP 4013: Scanner free run (exposure lamp off) These are the SP Modes related to scanning that are frequently used in servicing.
Page 45 Lab Work Practice the replacement and adjustment procedures in the Field Service Manual. Replacement and Adjustment ⇒ Scanner Unit Do any of the procedures that you think you need to practice. Pay attention to all notes, cautions, and warnings in the manual.
Page 46 B282-69/B283-69 Service Training 7. Image Processing No additional notes.
Page 47 Image Processing Overview Memory control DRAM Drum driver control- BICU Data comes to the BICU board from the SBU and the printer controller. See the notes for more details. The CCD generates an analog video signal. The SBU (Sensor Board Unit) converts the analog signal to an 8-bit digital signal, then it sends the digital signal to the BICU board.
Page 48 SBU (Sensor Board Unit) BICU Digital Analog processing 8-bit data processing 1 IPU VCU Analog processing 2 The CCD converts the light reflected from the original into an analog signal. Each CCD line has 7,400 pixels, producing a resolution of 600 dpi (23.6 lines/mm).
Page 49 Image Processing Data Flow BICU controller Memory controller DRAM The illustration shows image processing data flow. See the notes for a list of the processes done. Note: The next 13 slides will cover some details of image processing. The BICU is where the main image processing is done. The image data from the SBU goes to the IPU (Image Processing Unit) on the BICU board, which carries out the following processes on the image data: Auto shading...
Page 50: Image Processing Modes
Image Processing Modes The table shows the image processing modes. Three original types: Text, Photo and Special, each with several modes. Refer to the notes for details. Original Type Mode Targeted Original Type Text Normal Normal text originals Sharp Newspapers, originals through which the rear side is moderately visible as faint text.
Page 51: Image Processing Path
Image A/D Conversion Processing Image Correction •Auto Shading •ADS Path •W/B line erase correction •Scanner gamma correction •Small smoothing filter Magnification (main scan) The diagram shows the various stages of Filtering •MTF •Smoothing image processing and •Independent dot erase •Line width correction where they are performed.
Page 52 SP Modes for Each Image Processing Step These are the SP Modes for each processing step. 4921: Selects which original mode the settings from SP 4922 to SP 4932 will be applied to. 4922: Selects the scanner γ curve. You can select either a curve for text- based originals (brings out text) or a curve for photo originals (better distinctions between shades of dark colors).
Page 53: Auto Shading
Auto Shading Overview There are two auto shading methods: black level correction and white level correction. Auto shading corrects errors in the signal level for each pixel. Black and white level correction are always done. Black Level Correction The IPU detects the black dummy data from one end of the CCD signal (32 pixels at the end are blacked off) and takes the average of the black dummy data.
Page 54: White Line Erase
White Line Erase Setting SP4941-1 to a value other than "0" turns on white line erase. This feature works as follows: 1. The copier scans the original. 2. The density level of each pixel is compared with its adjacent pixels. 3.
Page 55 Black Line Erase The black line erase feature is the function that erases black lines made by dust or dirt on the exposure glass. The feature is validated (default) when you specify a value other than "0" in SP 4942 1. When you specify a larger value in this SP, the feature erases weaker black lines (less black lines).
Page 56: Auto Image Density (Ads)
Auto Image Density (ADS) In the SBU ADS prevents the background of an original from appearing on copies. As the scanner scans down the page, the IPU on the BICU detects the peak white level for each scan line. The IPU determines the reference value for the A/D conversion for a particular scan line using the peak white level for that scan line.
Page 57 Scanner Gamma Correction Text Original density Photo Output density Scanner gamma correction brings out gradations in darker areas. Scanner gamma correction is used in photo mode only. The CCD output is not proportional to the quantity of light received. Scanner gamma correction corrects the CCD output so that grayscale data is proportional to the quantity of light received.
Page 58 Magnification Changing the scanner speed enables enlargement and reduction along the sub scan direction. Enlargement and reduction along the main scan direction is handled by the IPU (SCRATCH) chip. The processing for main scan enlargement/reduction is the same as in previous digital machines.
Page 59 Mirroring in ADF Mode - Platen mode - - ADF mode - Sub Scan Sub Scan Main Main Scan Scan In ADF mode, a mirror image is created. When making copies using the ADF, the magnification circuit creates a mirror image. This is because the scanning start position along the main scan direction in ADF mode is at the opposite corner of platen mode.
Page 60 Filtering Overview There are several software filtering processes for enhancing the desired image qualities of the selected original mode. There are three MTF filters, a smoothing filter, independent dot erase, and line width correction. Each can be used only when certain modes are selected (details below) and are automatically applied.
Page 61 ID Gamma Correction Overview The machine automatically selects the most appropriate ID gamma correction based on the selected original type and the operation panel ID setting. In all modes, ID gamma correction can be adjusted with SP 4923. Gradation Processing There are three types of gradation processing.
Page 62: Video Control Unit (Vcu)
Video Control Unit (VCU) Fine Character and Image (FCI) Main Scan The FCI performs image smoothing. Scan This functions only affects binary picture processed images for certain original modes. Usually, binary picture processing generates jagged edges on characters, as shown in the illustration.
Page 63: Service Training
B282-69/B283-69 Service Training 8. Laser Exposure No additional notes.
Page 64: Laser Optics
Laser Optics This model uses a single laser beam. The LD drive board controls both the laser output and laser synchronization mechanism. The machine cuts off the power supply to the LD drive board if the front or right cover is opened. See the notes for the component names.
Page 65: Auto Power Control (Apc)
Auto Power Control (APC) The LD board controls +5VLD the laser diode. The APC circuit adjusts laser power for M61880 XLDENB temperature changes. The laser diode power is Video data (1-bit) adjusted on the production line. APC_SH +5VLD Do not adjust the variable resistors on the XDETP Sync detector...
Page 66: Ld - Safety Switch
LD - Safety Switch Front/Right Cover Safety Switches LDD: LDD Drive Board +5VLD +24V BICU Laser Beam Optical Path LD Driver IC Drum When the front or right-side cover is open, a switch cuts power to the laser diode. Both covers operate the same switches. To ensure technician and user safety and to prevent the laser beam from inadvertently switching on during servicing, there are safety switches at the front and right covers.
Page 67 SP Modes SP 2915: Polygon mirror idling time SP 2998: Main scan magnification (printer) There is also a main scan adjustment for the scanner (SP 4009). That one affects the image processing algorithms. SP 2998 affects the laser on/off frequency in the main scan direction. No additional notes.
Page 68 Lab Work Before you start Go to the machine. Look for the front and right cover switches. See how the covers operate the switches. On the point-to-point diagram, look at the circuit from the power supply through to the laser diode. Practice the following Laser unit component replacement procedures: See the Field Service Manual for details.
Page 69 B282-69/B283-69 Service Training 9. Photoconductor Unit No additional notes.
Page 70 Overview There is no new PCU detection in this machine. This is due to the PCU not being a user- replaceable part. Some of the components of the PCU are replaced individually at PM. When a new PCU is installed, new developer must also be installed and SP 2214 must be done to initialize the TD sensor.
Page 71 PCU Components Cleaning Blade Pick-off OPC Drum (30 mm Pawls diameter) Cleaning Brush Charge Roller With cleaning brush Pick-off Pawls Cleaning Unit OPC Drum Charge Counter blade Roller mechanism Edge cleaning mechanism Toner recycling Development Unit Development Roller OPC – Organic Photo-Conductor The quenching lamp and ID sensor are not part of the PCU.
Page 72 PCU Details The PCU contains the following. OPC drum Development unit (including development roller and TD sensor) Charge roller and charge roller cleaning brush Drum cleaning unit (blade, toner collection coil) Pick-off pawls The PCU does not contain the following. Transfer roller ID sensor Quenching lamp...
Page 73 Drive Drum Main motor Drum Drive Shaft The main motor drives the drum through a gear train as shown in the illustration. The main motor drives the drum through a series of gears and the drum drive shaft. The main motor assembly includes a drive controller, which outputs a motor lock signal when the rotation speed is out of the specified range.
Page 74 Lab Work Replace the PCU. See the field service manual: Replacement and Adjustment ⇒ PCU Section ⇒ Individual PCU components will be replaced in later sections.
Page 75 B282-69/B283-69 Service Training 10. Drum Charge No additional notes.
Page 76 Drum Charge Roller Terminal Plate Screw Cleaning Roller Drum Charge Roller Drum The roller is always in contact with the drum The drum charge roller is at -1700 V for printing This voltage can be changed using SP-2001-1 The drum surface voltage is -950 V This copier uses a drum charge roller to charge the drum.
Page 77: Charge Roller Voltage Correction
Charge Roller Voltage Correction Temperature and humidity affect the efficiency of voltage transfer from the drum charge roller to the drum. ID sensor pattern Lower humidity causes a higher drum charge voltage. Sub scan direction As a result, less toner is Charge voltage transferred.
Page 78: Id Sensor Pattern Production Timing
ID Sensor Pattern Production Timing Not for every page or every print or copy job, but at the following times: During warm-up at power on When the machine starts warming up from energy saver mode and the fusing temperature is less than the target temperature set with SP 2994.
Page 79 Charge Roller Cleaning Cam Gear Cleaning Brush Drum Charge Roller Drum The Cleaning Brush is always in contact with the Drum Charge Roller to clean off material which the Drum Charge Roller picks up from the Drum. A cam gear moves charge roller from side to side to improve cleaning. This waste is not recycled.
Page 80 SP Modes SP 2001: Charge Roller Bias Adjustment SP 2001-1 : Adjusts the voltage applied to the charge roller when printing. SP 2001-2 : Adjusts the voltage applied to the charge roller when generating the ID sensor pattern. SP2001-1: Increasing the (absolute) value will make the output image lighter. Decreasing it will make the image darker.
Page 81 B282-69/B283-69 Service Training 11. Development and Toner Supply No additional notes.
Page 82 Overview Dual component development system Single development roller Two mixing augers Doctor blade Doctor blade trims the magnetic brush. TD sensor helps control image density (with ID sensor). Development roller TD sensor Mixing augers Refer to the Core Technology Manual for details about dual component development.
Page 83 Drive Main motor Mixing augers Development drive shaft Development roller Main motor: Drives the development mechanism, via the development drive shaft Development drive shaft: Engages when the PCU is pushed in The development roller turns whenever the main motor is on. No development clutch The main motor drives the development roller and mixing augers through a train of gears and the development drive shaft.
Page 84: Developer Mixing
Developer Mixing Auger 1 Auger 2 Two mixing augers keep the developer mixed. Auger 2: Moves excess toner from the development roller towards the front Auger 1: Moves this excess toner, mixed with new toner, to the rear and back to the development roller The two mixing augers, keep the developer evenly mixed.
Page 85 Development Bias Drive shaft bias terminal Development roller White areas: High negative charge (-950V) Black areas: Discharged by the laser (about -150V) Development bias (-650V): Forces the negatively-charged toner onto the discharged areas of the drum. Applied to the development roller shaft through the drive shaft This machine uses a negative-negative development system, in which black areas of the latent image are at a low negative charge (about –154 ±50 V) and white areas are at a high negative charge (about –950 V).
Page 86 Toner Bottle Replenishment When the bottle Chuck is placed in the bottle holder The shutter moves against the side of the PCU, and it opens. When the lever is returned The cap is Lever pulled away Shutter so that toner can come out.
Page 87 Toner Supply - Bottle Drive Toner supply motor Toner supply motor turns the bottle To supply fresh toner to the development unit, the toner supply motor turns on. The spiral grooves help toner to move towards the bottle exit. No additional notes.
Page 88 Toner Supply - Input to Development Unit The Mylar tabs in the bottle unit push the toner towards the development unit entrance. Recycled toner from the drum also arrives at this entrance. New toner enters here Recycled toner enters here No additional notes.
Page 89 Toner Density Control 1 -- Overview Toner density is controlled by both Toner supply motor on TD sensor and ID time calculation sensor. TD sensor output (Vt) Toner is supplied when Vt is higher Vt reference than Vref. voltage (Vref) New Vref Vt reference voltage update...
Page 90: Toner Density Control
Toner Density Control 2 Toner Density Sensor Initial Setting The TD sensor initial setting (SP 2214: Developer Initialize) procedure must be done after replacing the developer. During TD sensor initial setting, the TD sensor is set so that the TD sensor output is the value of SP 2926 (default: 2.4 V).
Page 91 Toner Density Control 3 Vsp/Vsg Detection and Vref Determination The ID sensor detects the following voltages. » Vsg: The ID sensor output when checking the drum surface. » Vsp: The ID sensor output when checking the ID sensor pattern. In this way, the reflectivity of both the drum surface and the pattern on the drum are checked, compensating for any variations in the reflectivity of the pattern on the drum or the reflectivity of the drum surface.
Page 92 Toner Density Control 4 Toner Supply Determination The reference voltage (either Vts or Vref) is the threshold voltage for determining whether or not to supply toner. If Vt becomes greater than the reference voltage, the machine supplies additional toner. This can be checked using SP 2220. »...
Page 93 Toner Density Control 5 Toner supply motor on time in Value of Motor On Time fixed control mode SP2925 (t = 200 ms) The toner supply motor on time is specified by the setting of SP 2925, and does not vary. The default setting is 200 ms for each copy.
Page 94 Toner Density Control 6 Toner supply motor on time in sensor control mode For sensor control modes 1 and 2, the toner supply motor on time is decided by the following factors. » Vt » Vref or Vts » TD sensor sensitivity (coefficient: S, value is 0.4) There are seven levels for toner supply motor on time as shown in the table below.
Page 95 Abnormal ID Sensor Conditions ID sensor readings are abnormal if any of the following conditions occur: Vsg ≤ 2.5V Vsg < 3.5V when maximum power (979) is applied Vsp ≥ 2.5V (Vsg – Vsp) < 1.0V Vt ≥ 4.5V or Vt ≤ 0.2V The above ID sensor values can be checked using SP 2221.
Page 96 Abnormal TD Sensor Condition The TD sensor output is checked every copy. If the readings from the TD sensor become abnormal, the machine changes the toner density control mode to fixed supply mode 2, and the toner supply amount per page is always 200 ms, regardless of the value of SP 2925.
Page 97: Toner Near-End/End Detection
Toner Near-end/End Detection If Vt level 6 is detected 5 consecutive times, near- end is detected. Toner is supplied after the copy job: If supply recovers to Vt level 5, near-end is cancelled. Otherwise, toner end occurs after 50 copies If Vt level 7 is detected 3 consecutive times, toner end is detected immediately.
Page 98: Service Training
B282-69/B283-69 Service Training 12. Image Transfer and Paper Separation No additional notes.
Page 99: Image Transfer And Paper Separation
Image Transfer and Paper Separation Discharge plate Drum Transfer roller Power pack The transfer roller contacts the drum. A positive charge is applied to the transfer roller as paper passes between it and the drum, attracting the image from the drum to the paper. Drum curvature and the discharge plate separate the paper from the drum.
Page 100 Drive Main motor Drum Transfer roller Gear The drum drives the transfer roller through a gear The transfer roller always contacts the drum (there is no touch and release mechanism). No additional notes.
Page 101: Transfer Current
Transfer Current First, a low current (10 μA) is supplied at the leading edge (before the print area). This prevents positively charged toner remaining on the drum from transferring to the roller. Then a high current is supplied to transfer the image to the paper.
Page 102 Transfer Current Table The high transfer current levels (default) are as shown in the table below in the notes. (Go to "Notes Page" view to see the table.) With SP 2301, the high transfer current level used for the paper feed trays, duplex tray, by-pass tray, and transfer roller cleaning can be adjusted.
Page 103: Transfer Roller Cleaning
Transfer Roller Cleaning A negative cleaning current is applied, followed by a positive current. Negatively and positively charged toner particles are both transferred back to the drum. The current for the negative-charge phase can be adjusted with SP 2301-4. Three conditions for entering cleaning mode: Before starting a job »...
Page 104 Lab Work Practice replacing the following components Transfer roller ID sensor (Not related to transfer, but this is a convenient time to practice ID sensor removal as the transfer roller must be removed first.) No additional notes.
Page 105 B282-69/B283-69 Service Training 13. Drum Cleaning and Toner Recycling No additional notes.
Page 106: Drum Cleaning
Drum Cleaning Cleaning Blade Toner Collection Coil Cleaning blade removes remaining toner from drum after the image is transferred to the paper. To remove toner from edge of the cleaning blade, the drum turns in reverse for about 5 mm at end of each copy job.
Page 107: Toner Recycling
Toner Recycling Toner collection coil Opening Mixing Auger Toner collection coil: Moves toner towards the opening in the PCU (Photo Conductor Unit), where it is mixed with new toner and used again. Toner picked up by the toner collection coil, is transported to the opening in the side of the PCU.
Page 108 Lab Work Take out the PCU and practice removing and installing the following parts. (Refer to the Field Manual for all procedures.) Pick-off pawls and toner density sensor OPC drum Charge roller and cleaning brush Cleaning blade Developer (This is optional as you added developer during installation.) Note: When you are finished, be sure to do the actions specified by the "After Replacement or...
Page 109 B282-69/B283-69 Service Training 14. Paper Feed No additional notes.
Page 110 Overview - 1 By-pass tray Paper tray Built-in paper tray: 250 sheets Friction pad and feed roller system Bypass tray: Up to 100 sheets Refer to the Core Technology Manual for details about paper feed systems.
Page 111 Overview - 2 The paper tray holds 250 sheets. The paper tray feed stations use a friction pad system. To prevent paper from getting caught inside the machine when the tray is pulled out, the paper feed roller and shaft do not separate from the tray when the tray is pulled out. Two relay sensors are used for paper jam detection.
Page 112 Main motor Paper Feed Drive Main motor: Drives pick-up and feed mechanism of paper tray. Paper feed clutch Paper feed clutch transfers main motor drive to the paper feed roller. When the paper feed clutch Paper feed roller turns on, feed roller starts to feed paper.
Page 113: Feed And Separation
Feed and Separation Feed roller and friction pad feed system. The friction pad pressure is not adjustable. Paper Feed Roller Friction Spring The paper feed roller drives the top sheet of paper from the paper tray to the copier. The friction pad allows only one sheet to feed at a time.
Page 114: Paper Lift Mechanism
Paper Lift Mechanism Bottom Plate Hook Slider Projection Paper Tray When paper tray is closed, projection on copier frame pushes slider off bottom plate hook. After release slide comes off, compressed springs lift bottom plate. No additional notes.
Page 115 Paper End Feeler Paper End Sensor Detection Paper end sensor: Feeler falls through a slot in the bottom plate when there is no paper. The paper end sensor is mounted on the frame above the paper tray. If there is any paper in the paper tray, the paper stack lifts the feeler and the paper end sensor is deactivated.
Page 116 Paper Size Detection – Paper Tray Switches actuated by paper size actuator behind paper size indicator plate. Switch Paper Size Paper Size Actuator A3, 11" x 17" A4 LEF A4 SEF, 8½" x 11" A5 LEF, 8½" x 14" 8½" x 13" 11"...
Page 117 – Paper Size Detection By-pass Tray Paper Size Switch CN No. (BICU) A4 SEF 8"x13" A5 SEF CN136-1 ON/OFF CN136-2 ON/OFF CN136-3 (GND) CN136-4 CN136-5 Bypass paper size switch monitors paper width. Side fences turn a gear wheel that contains sensor terminals. More on Paper Size Detection The side guides contain ratchets that turn a gear wheel at the center of the sensor.
Page 118: Side Fences
Side Fences Stoppers The side fences have stoppers to prevent them from moving when a full tray is pushed in too strongly. If the tray is full of paper and it is pushed in strongly, the fences may deform or bend. This may cause the paper to skew or the side-to-side registration to be incorrect.
Page 119 Main Motor Paper Registration Registration sensor: Detects Registration paper arrival at the Rollers registration rollers and detects paper misfeeds. Mylar SP 1003: Adjusts amount of buckle at the registration rollers to prevent Registration skew. Clutch SP 1903: Adjusts the amount of push after skew Registration Sensor correction to help...
Page 120 SP Modes SP 1001: Leading edge registration for various paper feed stations SP 1002: Side-to-side registration for various paper feed stations SP 1003: Adjusts amount of buckle at the registration roller to prevent skew. SP 1903: Feed Clutch Boost Adjusts the amount of extra push that the feed clutch gives to the paper after the skew has been corrected at registration.
Page 121 Lab Work Practice replacing the following parts Feed roller Friction pad Optional replacement practice Exit sensor By-pass feed roller and paper end sensor Registration roller By-pass paper end switch Registration clutch Registration sensor Paper feed clutch and by-pass feed clutch Relay clutch Relay sensor Paper size switch...
Page 122: Service Training
B282-69/B283-69 Service Training 15. Fusing No additional notes.
Page 123 Overview This is a standard heat and pressure Exit Sensor fusing system. Pressure Roller Thin-walled hot roller with lamp heat source. Pressure roller constantly pressed Hot Roller against hot roller by Thermostat springs. Thermistor Fusing Lamp Pressure Springs No additional notes.
Page 124 Fusing Unit Drive Drive Timing Gear Belt Paper Exit Rollers Main Right Motor Cover Main motor drives fusing unit through gear train and drives paper exit rollers through a timing belt. Fusing unit drive gear disengages when the cover is open for easier jam removal.
Page 125: Fusing Entrance Guide Shift
Fusing Entrance Guide Shift If the paper creases in the fusing unit, shift the guide by moving the screws to the inner holes. The entrance guide is adjustable for paper thickness to prevent creasing. The outer screw holes on each side are used as the default setting. If creasing occurs frequently in the fusing unit, adjust the entrance guide to the right, by securing it with the inner holes.
Page 126 Fusing Pressure Hot roller Pressure roller Pressure adjustment notches Pressure spring The springs apply pressure between the hot roller and the pressure roller. The springs can be moved to adjust pressure. The default position is the end notch. The pressure springs constantly apply pressure between the hot roller and the pressure roller.
Page 127: Fusing Temperature Control
Fusing Temperature Control 1 Thermostats Thermister The machine checks the thermistor once per second. The machine compares the current and previous readings, and the target, and decides how long to keep the lamp on during the next second. The thermostats provide overheat protection. The fusing temperature is controlled using a thermistor.
Page 128 Fusing Temperature Control 2 Regular start Temperature Cold start UPPER CASE Adjustable by SP lower case Cannot be adjusted Time A1: Normal warm-up (SP1103-1 = 0, default) A2: Idling during warm-up (SP1103-1 = 1, good for cold temp starts) T1: Low power temp (SP1105-7, default is 60°C) T2: Stand-by temp (SP1105-3, default is 175°C) T4: Print/copy temp (SP1105-5, default is 175°C) G: Fusing temp check timing (SP1108, default is 1 s)
Page 129: Overheat Protection
Overheat Protection Fusing Overheat Error 1 If the fusing temperature reaches more than 230°C and continues 10 times consecutively (100 ms x 10 = 1 second), SC543 shows on the LCD and the controller turns the fusing lamp off. Fusing Overheat Error 2 If the fusing temperature reaches more than 250°C and continues 10 times consecutively (100 ms x 10 = 1 second), SC544 shows on the LCD and the controller turns the...
Page 130 SP Modes SP 1103: Fusing idling on/off SP 1105: Fusing unit temperatures SP1105-9 sets the fusing temperature for thick paper. (default: 185°C) This is only used for paper fed from the bypass tray. The user must go to User Settings and set the bypass paper type to "Thick Paper". SP 1106: Displays the current fusing unit temperature SP 1107: Fusing soft start adjustment This SP sets the number of zero-cross cycles of the fusing lamp AC...
Page 131 Lab Work Practice replacing the following parts. Hot roller Pressure roller Stripper pawls Optional – replace the thermistor and thermostats. (Easy) Practice nip width adjustment. Refer to the FSM for the details. Be sure to heed all cautions and notes. No additional notes.
Page 132 B282-69/B283-69 Service Training 16. Duplex No additional notes.
Page 133 Overview Duplex Inverter Roller After fusing, the junction Duplex Entrance Sensor gate directs the paper either: Out through the exit rollers Junction gate Up to the duplex inverter rollers If paper goes to the duplex inverter rollers: First, it goes to the Duplex Exit Sensor inverter table.
Page 134 Drive Duplex inverter motor Duplex inverter roller Duplex transport motor Duplex inverter motor: Drives the inverter roller Duplex transport motor: Drives the rollers in the duplex unit Two motors drive the duplex mechanism. The duplex inverter motor is a reversible motor.
Page 135 Duplex Entrance Inverter gate solenoid Switches on to send paper to the inverter table Stays off to feed paper out of the machine No additional notes.
Page 136 Duplex Feed Path Inverter Duplex Inverter Sensor Roller The junction gate directs the paper up to the duplex inverter rollers, instead of out to the exit rollers. When the paper trailing edge reaches the Duplex Inverter Sensor: The Inverter Roller reverses and the paper goes to the duplex unit.
Page 137 Basic Operation 1 Larger than A4 Short- edge/LT Short-edge The paper feed path can hold only one sheet of copy paper at a time. Example: 8 pages. The number [A] in the illustration shows the order of pages. The number [B] in the illustration shows the order of sheets of copy paper (if black, this...
Page 138 Basic Operation 2 Up to A4 Short- edge/LT Short-edge The paper feed path can hold two sheets of copy paper. Example: 8 pages. The number [A] in the illustration shows the order of pages. The number [B] in the illustration shows the order of sheets of copy paper (if black, this indicates the second...
Page 139 SP Mode SP2301-3 : Transfer current adjustment – Duplex Adjusts the current applied to the transfer roller when carrying out a duplex job. Use this SP if there is poor image transfer on the rear side of duplex copies. No additional notes.
Page 140 Lab Work Practice the removal procedures for the Duplex Unit. See the Field Service Manual for the detailed procedures. Skip this if you are trained on the B282-65.
Page 141 B282-69/B283-69 Service Training 17. ADF No additional notes.
Page 142 Overview Feeds originals past the DF exposure glass while scanning. (Fixed optics, moving original) Inverter unit allows duplex copying and stacking in the correct order after scanning. The DF exposure glass is a narrow glass to the left of the exposure glass. No additional notes.
Page 143 Component Layout Study the component layout diagrams in the service manual. Mechanical layout Drive layout Electrical component layout Go to your machine and find the components on the diagrams. No additional notes.
Page 144: Original Size Detection
Original Size Detection Two width sensors [A, B]) and two length sensors [C, D]) Refer to the original size detection matrix on page B813-5 of the service manual. The original exit trailing edge sensor [E] detects when the trailing edge of the last page has been fed in. No additional notes.
Page 145: Pick-Up And Separation
Pick-up and Separation Pick-up roller Pick-up roller Pick-up solenoid Transport guide Reverse roller Feed belt Transport motor Original set sensor Pick-up solenoid: Lowers the transport guide and pick-up roller. Transport motor: Drives all the rollers. FRR feed system Refer to the Core Technology Manual for details about FRR (and other) feed systems.
Page 146 Transport and Feed-out (ADF) Registration sensor Transport motor (see previous slide) separates the top original and feeds it through the scanning area. Motor speed depends on the reproduction ratio. More on Transport and Feed-out Study the path of paper through the ADF. The machine scans the original through the DF exposure glass.
Page 147 SP Modes SP 6006: ADF image adjustments SP 6009: ADF free run SP 6901: Displays the status of original size sensors. SP 6910: ADF shading time No additional notes.
Page 148 Lab Work Practice replacing the following PM parts. Feed belt Reverse roller (Called the "separation roller" in the replacement procedure.) Pick-up roller Optionally disassemble the machine and replace any other parts you wish See the service manual for details of the replacement procedures.
Page 149 B282-69/B283-69 Service Training 18. ARDF No additional notes.
Page 150 Overview Feeds originals past the DF exposure glass while scanning. (Fixed optics, moving original) Inverter unit allows duplex copying and stacking in the correct order after scanning. The DF exposure glass is a narrow glass to the left of the exposure glass. No additional notes.
Page 151 Component Layout Study the component layout diagrams in the service manual. Mechanical layout Drive layout Electrical component layout Go to your machine and find the components on the diagrams. No additional notes.
Page 152 Original Size Detection One width sensor [A], and two length sensors [B,C] Width sensor: Output depends on the guide position. Refer to the original size detection matrix on page B814-5 of the service manual. No additional notes.
Page 153 Pick-up and Separation Original set sensor Pick-up roller Pick-up solenoid Lift plate Lift plate Reverse roller Feed belt Pick-up solenoid: Raises the lift plate, to lift the originals to the pick-up roller. FRR feed system Refer to the Core Technology Manual for details about the FRR feed system.
Page 154 Original Transport and Exit Single-sided Originals First transport roller Registration sensor DF exposure glass Original is fed to the first transport roller at maximum speed and stops at the registration sensor. At registration time the original is fed at the scanning speed past the DF exposure glass.
Page 155 Original Transport and Exit Double-sided Originals 1 Junction gate Original exit sensor When the original exit sensor detects the leading edge, the junction gate opens and the original goes to the reverse tray. No additional notes.
Page 156 Original Transport and Exit Double-sided Originals 2 Junction gate Reverse roller When the paper is in the reverse tray, the junction gate closes. The DF feed motor reverses and the reverse roller feeds the original back into the ARDF. No additional notes.
Page 157 Original Transport and Exit Double-sided Originals 3 The reverse side is scanned The original is fed to the reverse tray again The ARDF will reverse the page once more so that the pages of the original are stacked in the correct order. No additional notes.
Page 158 Original Transport and Exit Double-sided Originals 4 The page is fed in from the reverse tray and out to the exit tray. Refer to the service manual for more details on scanning two-sided originals.
Page 159 SP Modes SP 6006: ARDF image adjustments SP 6009: ARDF free run SP 6901: Displays the status of original size sensors. SP 6910: ARDF shading time No additional notes.
Page 160 Lab Work Practice replacing the following PM parts. Feed belt Reverse roller Pick-up roller Optionally disassemble the machine and replace any other parts you wish See the service manual for details of the replacement procedures. No additional notes.
Page 161 B282-69/B283-69 Service Training 19. Paper Tray Unit No additional notes.
Page 162: Mechanical Components
Mechanical Components Study the component layout diagrams (in both the One and Two-Tray Paper Tray Unit Service Manuals). Mechanical component layout Electrical component layout Drive layout Go to your machine and locate the components shown in the diagrams. No additional notes.
Page 163 Specifications Paper Size: A5 to A3 5½ " x 8½ " SEF to 11" x 17" Paper Weight: 60 – 105 g/m , 16 – 28 lb Tray Capacity: 500 sheets (80 g/m , 20 lb) per tray Paper Feed System: Feed roller and friction pad Paper Height Detection: 4 steps (100%, 70%, 30%, Near end) No additional notes.
Page 164 Mechanisms The following are the same for both the one and two-tray units. Paper Lift » The only difference being that there are adjustment SPs for both trays. (SP 1002 and 1003) Paper End Detection Paper Height Detection Paper Size Detection End and Side Fences No additional notes.
Page 165 Lab Work Practice the replacement procedures in the Service Manual. Do any of the procedures that you think that you need to practice. Pay attention to all notes, cautions, and warnings in the manual. No additional notes.
Page 166 B282-69/B283-69 Service Training 20. Troubleshooting No additional notes.
Page 167 Special Tools & Lubricants Scanner Positioning Pins (4 pins/set) A0069104 (1 set) Test Chart S5S (10 pcs/set) A2929500 (1 set) 4MB Flash Memory Card N8036701 Grease Barrierta S552R A2579300 Silicone Grease G-501 52039502 SD Card B6455010 Grease Barrierta S552R is temperature resistant. Use it on fusing unit drive components as needed...
Page 168: Memory All Clear
Memory All Clear Before memory all clear, either: SP 5990: Print the lists of settings (SMC lists) SP 5824: Upload the NV-RAM contents Memory All Clear SP 5801 More on Memory Clear This is only done after replacing the NVRAM or recovering from NVRAM problems.
Page 169 Troubleshooting Done by the User General Settings Guide – Troubleshooting Troubleshooting in the OI Manual and try to imagine some of the mistakes users might make. No additional notes.
Page 170 SC Codes Four levels: A – D (See notes) Reset ‘Level A’ codes with SP 7807 » Level A codes cannot be reset by only switching the machine off/on. There are four levels of service call conditions. Level A: To prevent damage to the machine, the main machine cannot be operated until the SC has been reset by a service representative (see the note below).
Page 171: Self Diagnostics
Self Diagnostics The self-diagnostics procedure is automatically done just after the power is switched on. SP 7832: Displays Self-diagnostics Displays the SC codes and the number of their occurrences. Each number is in the range of 0 to 9999. No additional notes.
Page 172 SMC Print SP 5990: Outputs machine status lists 001 All (Data List) 002 SP (Mode Data List) 003 User Program 004 Logging Data See the FSM for details Using SP Modes ⇒ SMC Print (SP 5990)] No additional notes.
Page 173 SP Modes – Symptom Troubleshooting 1 SP 1103: Fusing idling enable/disable Enable if fusing on the first two copies is incomplete SP 1108: Fusing temperature control cycle Increase if the user complains about flickering room lights. However, fusing lamp errors may not be detected.
Page 174 SP Modes – Symptom Troubleshooting 2 SP 2213: Number of copies after near-end If the user makes a lot of copies with a high proportion of black, reduce this setting. Also you can try increasing the value of SP 2922 and/or SP 2925 SP 2301: Transfer current SP 2301 1-2: Increase if thicker paper than normal is used...
Page 175 SP Modes – Symptom Troubleshooting 3 SP 2906: 'Tailing' correction When making many copies of an original that contains vertical lines (such as in tables), the paper may not separate correctly. This can cause tailing images (ghosts of the vertical lines continuing past the bottom of the table).
Page 176 Free Runs Main Machine SP 4013: Scanner (with lamp on) SP 5802: Scanner and printer SP 5901: Printer ADF/ARDF SP 6009 DIP switch 100 » You can use DIP switch 100 (on the DF control board) to carry out several document feeder free runs. (See the B813/B814 service manuals for details.) The ADF and ARDF also have free run modes.
Page 177: Other Troubleshooting Tools
Other Troubleshooting Tools The Field Service Manual contains the following troubleshooting tools (in addition to those already mentioned on previous slides). In the Troubleshooting section » Electrical component defect table In the System Maintenance Reference section » ID Sensor Error Analysis (SP2221) There aren't any SC codes for ID sensor malfunction but SP2221 gives information on ID sensor condition.
Page 178 B282-69/B283-69 Service Training 21. Environmental Conservation Technology for Environmental Conservation Energy Saving Paper Saving No additional notes.
Page 179 Technology for Environmental Conservation **： New or modified function *： Has this function Blank： Does not have this function Environmental Description New model Old model Technology/Feature FA318/FA320L ML319 1. QSU - Reduction of warm-up time (Energy 2. Hybrid QSU saving) 3.
Page 180 Brief Descriptions of the Technologies 1. QSU (Quick Start-up) This technology reduces both the amount of energy consumed while in Standby mode (the Ready condition) is reduced, as well as the time it takes for the machine to warm up to the Read condition. This is made possible through the utilization of dual fusing lamp heating, low fusing point toner, a pressure roller with a "sponge"...
Page 181 Brief Descriptions of the Technologies 3. IH QSU This technology incorporates IH (Inductance Heating) technology into conventional QSU technology, which allows the benefits of reduced energy consumption and reduced warm-up time to be extended to color machines. 4. Paper-saving features 1) The duplex (double-sided) and Combine features reduce paper consumption.
Page 182 Brief Descriptions of the Technologies 5. High-speed duplex copying 1) Enables high-speed duplex printing through the utilization of the Duplex Interleaf and high- speed Inverter Transport features. 2) Enables quick printing of duplex jobs through the use of Duplex Scanning. 6.
Page 183 Brief Descriptions of the Technologies 7. PxP (polymerized) toner "PxP toner" is a fine-particle, polyester resin based toner, manufactured using a Ricoh-original polymerization method instead of the conventional pulverization method. This allows the toner to fuse at a lower temperature, which reduces the impact on the environment and contributes to achieving even higher image quality than before.
Page 184 1) Products sold in the EU conform to the RoHS Directive. 2) Products sold in China conform to China's version of the RoHS Directive. 3) In addition, Ricoh imposes strict internal standards for limiting the presence of harmful substances. No additional notes...
Page 185 Brief Descriptions of the Technologies 10. Environmentally-friendly toner bottle A changeover from PS/PP/HDP to PET plastics allows approximately 40 percent by weight of the toner bottle to be recycled, and also reduces CO emissions that occur during the toner bottle manufacturing process. 11.
Page 186 2. Energy Saving 2.1 Overview – 1 Power Consumption Warm-up Operation Mode Ready Mode Energy Saving Off/Sleep Mode Plug In Time Auto Off Timer Timer Starts After 240 min 1 – 240 min from last job Energy Saver Modes Description Auto Off Mode If no printer/scanner unit is installed: No power is supplied to the printing engine and the controller.
Page 187 2. Energy Saving 2.2 Overview – 2 (System Settings) Power Consumption Warm-up Operation Mode Ready Mode Off/Sleep Mode Plug In Time Auto Off Timer Timer Starts After 240 min 1 – 240 min from last job 1) Timer settings and recovery time (System settings => Timer setting) Mode Timer Default...
Page 188 2. Energy Saving 2.2 Energy Saver Mode: Condition of LEDs Condition of LEDs on the operation panel Mode Operation Switch LED Energy Saver LED Main Power LED Low Power Mode Off/Sleep Mode No additional notes...
Page 189 2. Energy Saving 2.2 Energy Saver Mode: Low Power Mode The machine enters low power mode when the energy saver timer runs out after the last job. When the machine enters low power mode, the fusing temperature is lowered to 60°C. The machine recovers to the ready condition if one of the following occurs: The Energy Saver key is pressed...
Page 190 2. Energy Saving 2.2 Energy Saver Mode: Off Mode – 2 The machine recovers to the ready condition if the operation switch is pressed. Power Consumption Warm-up Operation Mode Warm-up Operation Mode Ready Mode Ready Mode Off Mode Off Mode Plug In Time Operation Switch is...
Page 191 2. Energy Saving 2.2 Energy Saver Mode: Sleep Mode – 1 Sleep mode is used instead of auto off mode when a printer/scanner unit is installed. The machine enters sleep mode when one of the following is done. The auto off timer runs out after the last job. The operation switch is pressed to turn the power off.
Page 192 2. Energy Saving 2.2 Energy Saver Mode: Sleep Mode – 2 The machine recovers to the ready condition: If data is received » After warm-up, the job starts, but the operation panel stays dark. » Then, after the job is completed, the machine returns to sleep Power mode immediately.
Page 193 2. Energy Saving 2.2 Energy Saver Mode: Sleep Mode – 3 The machine recovers to the ready condition: If the operation switch is pressed » The operation panel lights. When warm-up is finished, the machine goes to the ready condition. »...
Page 194 End of Course No additional notes.

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