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Ricoh B245-62 Service Training

Ricoh B245-62 Service Training

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B245-62 / PD-C4
B245-62
Service Training
Slide 1
Release date – 19 February 2010
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Summary of Contents for Ricoh B245-62

  • Page 1 B245-62 / PD-C4 B245-62 Service Training Slide 1 Release date – 19 February 2010...
  • Page 2 B245-62 / PD-C4 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 Troubleshooting 6 Scanner 17 Environmental Conservation 7 Image Processing 8 Laser Exposure...
  • Page 3 B245-62 / PD-C4 B245-62 Service Training 1. Product Outline Slide 3 Most recently updated 18 February 2010.
  • Page 4 B245-62 / PD-C4 The Machine This is the machine you will study in this training course. Go to the machine and familiarize yourself with it. Refer to the operating instructions and FSM for component names. Slide 4 No additional notes.
  • Page 5 No alignment problems. Don't have to feed the paper back into the machine. Increased Copy Speed Multicopy rate has been increased for the B245-62. (18 cpm ⇒ 19 cpm) Slide 5 The ID Copy function is a requirement of the Chinese market. The Chinese ID was changed in 2007 and now has important information on the reverse side.

  • Page 6: Operation Panel

    B245-62 / PD-C4 Operation Panel 1. Indicators 10. ID copy key Familiarize yourself with the 2. Display panel 11. Sort key operation panel. 3. Selection keys 12. Image density keys See the operating instructions for detailed descriptions of key and 4.
  • Page 7 B245-62 / PD-C4 B245-62Service Training 2. Specifications Slide 7 No additional notes.

  • Page 8: Specifications

    B245-62 / PD-C4 Specifications Look over the Specifications section of the FSM for the following - comparing these specifications with the previous machine if you are not already familiar with them. General Specifications Paper sizes Machine configuration Slide 8 No additional notes.
  • Page 9 B245-62 / PD-C4 B245-62 Service Training 3. Installation Slide 9 No additional notes.
  • Page 10 B245-62 / PD-C4 Install the Copier Procedure: Copier Installation (see FSM) The machine automatically initializes itself; there are no process controls to do. After installing the machine and all options, and making all test copies, record the value of the total counter.
  • Page 11 B245-62 / PD-C4 Putting in Developer Make only a small cut in top corner of bag for better control when pouring. Make sure not to spill developer on gears. If you have to turn gear to distribute developer evenly, make sure to do so very slowly and as little as possible.

  • Page 12: Upgrade The Firmware

    B245-62 / PD-C4 Upgrade the Firmware Install the latest firmware for the machine. Firmware Update Procedure in the FSM. (System Maintenance Reference ⇒ Using SP Modes ⇒ Firmware Update Procedure) Slide 12 No additional notes.
  • Page 13 B245-62 / PD-C4 Set SP Modes Input the product serial number and service contact numbers. SP 5811: Serial number SP 5812: Service telephone and fax numbers Slide 13 No additional notes.
  • Page 14 B245-62 / PD-C4 B245-62 Service Training 4. Machine Overview Slide 14 No additional notes.
  • Page 15 B245-62 / PD-C4 Mechanical Components: Layout Scanner motor Fusing unit Scanner Transfer roller Paper cassette Laser unit Development unit Paper feed rollers Note the major components shown above. Locate the components on the machine. Slide 15 For a full list of mechanical components, see...

  • Page 16: Drive Layout

    B245-62 / PD-C4 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 Slide 16...

  • Page 17: Copy Process

    B245-62 / PD-C4 Copy Process Cleaning Quenching Paper separation Drum charge Image transfer ID Sensor Laser exposure Development See the notes for copy process details. Slide 17 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 18 B245-62 / PD-C4 B245-62 Service Training 5. PM (Preventive Maintenance) Slide 18 No additional notes.
  • Page 19 B245-62 / PD-C4 PM Intervals This machine has PM intervals of 60 K and 120 K. (See PM Tables in the FSM.) Reset the PM counter after finishing a PM (SP 7804 1). How to Reset the PM Counter in the FSM...

  • Page 20: Preventive Maintenance Tables

    B245-62 / PD-C4 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.
  • Page 21 B245-62 / PD-C4 B245-62 Service Training 6. Scanner Slide 21 No additional notes.

  • Page 22: Scanner Unit

    B245-62 / PD-C4 Scanner Unit 600 dpi CCD Exposure lamp: One xenon lamp The reflector reduces shadows on paste-up originals Anti-condensation heater available as an option See the notes for more details. Slide 22 1. Exposure Lamp 2. 1st Scanner 3.

  • Page 23: Scanner Drive

    B245-62 / PD-C4 Scanner Drive Scanner drive motor drives the scanners through timing belts. 1st scanner moves at 100 mm/s; 2nd scanner at 50 mm/s. See the notes for details. Slide 23 A stepper motor drives the 1st and 2nd scanners [A, B]. The 1st scanner is driven by the scanner drive motor [C], drive gear through the timing belt [D], scanner drive pulley [E], scanner drive shaft [F], and two timing belts [G].
  • Page 24 B245-62 / PD-C4 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) Slide 24 These are the SP Modes related to scanning that are frequently used in servicing.
  • Page 25 B245-62 / PD-C4 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 26 B245-62 / PD-C4 B245-62 Service Training 7. Image Processing Slide 26 No additional notes.
  • Page 27 B245-62 / PD-C4 Image Processing Overview Data comes to the BICU board from three sources -- scanner, SBU, and printer controller. See the notes for more details. Slide 27 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 28 B245-62 / PD-C4 SBU (Sensor Board Unit) 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). SBU does analog processing and analog to digital conversion.
  • Page 29 B245-62 / PD-C4 Image Processing – Overview 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. Slide 29 The BICU is where the main image processing is done.

  • Page 30: Image Processing Modes

    B245-62 / PD-C4 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...

  • Page 31: Image Processing Path

    B245-62 / PD-C4 Image Processing Path The diagram shows the various stages of image processing and where they are performed. Slide 31 No additional notes.
  • Page 32 B245-62 / PD-C4 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 33: Auto Shading

    B245-62 / PD-C4 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 34: White Line Erase

    B245-62 / PD-C4 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.
  • Page 35 B245-62 / PD-C4 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.

  • Page 36: Auto Image Density (Ads)

    B245-62 / PD-C4 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 37 B245-62 / PD-C4 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. Slide 37 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 38 B245-62 / PD-C4 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 39 B245-62 / PD-C4 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 40 B245-62 / PD-C4 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.

  • Page 41: Video Control Unit (Vcu)

    B245-62 / PD-C4 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 42: Service Training

    B245-62 / PD-C4 B245-62 Service Training 8. Laser Exposure Slide 42 No additional notes.

  • Page 43: Laser Optics

    B245-62 / PD-C4 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.

  • Page 44: Auto Power Control (Apc)

    B245-62 / PD-C4 Auto Power Control (APC) The LD board controls the laser diode. The APC circuit adjusts laser power for temperature changes. The laser diode power is adjusted on the production line. Do not adjust the variable resistors on the LD unit in the field.

  • Page 45: Ld - Safety Switch

    B245-62 / PD-C4 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.
  • Page 46 B245-62 / PD-C4 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.
  • Page 47 B245-62 / PD-C4 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.
  • Page 48 B245-62 / PD-C4 B245-62 Service Training 9. PCU (Photo Conductor Unit) Slide 48 No additional notes.
  • Page 49 B245-62 / PD-C4 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 reinitialize the TD sensor.
  • Page 50 B245-62 / PD-C4 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 Slide 50 OPC –...
  • Page 51 B245-62 / PD-C4 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.
  • Page 52 B245-62 / PD-C4 Drive Drum Main motor Drum Drive Shaft The main motor drives the drum through a gear train as shown in the illustration. Slide 52 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 53 B245-62 / PD-C4 Lab Work Replace the PCU. See the field service manual: Replacement and Adjustment ⇒ PCU Section ⇒ Slide 53 Individual PCU components will be replaced in later sections.
  • Page 54 B245-62 / PD-C4 245-61 Service Training Full Course 10. Drum Charge Slide 54 No additional notes.
  • Page 55 B245-62 / PD-C4 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...

  • Page 56: Charge Roller Voltage Correction

    B245-62 / PD-C4 Charge Roller Voltage Correction Temperature and humidity affect the efficiency of voltage transfer from the drum charge roller to the drum. Lower humidity causes a higher drum charge voltage. As a result, less toner is transferred. To determine whether to...

  • Page 57: Id Sensor Pattern Production Timing

    B245-62 / PD-C4 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 58 B245-62 / PD-C4 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.
  • Page 59 B245-62 / PD-C4 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.
  • Page 60 B245-62 / PD-C4 B245-62 Service Training 11. Development and Toner Supply Slide 60 No additional notes.
  • Page 61 B245-62 / PD-C4 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 Slide 61 Refer to the Core Technology Manual for details about dual component...
  • Page 62 B245-62 / PD-C4 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.

  • Page 63: Developer Mixing

    B245-62 / PD-C4 Developer Mixing Auger Auger Two mixing augers keep developer mixed. Slide 63 More on Developer Mixing Mixing does the following: Keeps the toner and developer evenly mixed Prevents lumps from forming Helps create a triboelectric charge on the toner.
  • Page 64 B245-62 / PD-C4 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...
  • Page 65 B245-62 / PD-C4 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 66 B245-62 / PD-C4 Toner Supply - Bottle Drive Toner supply motor turns the bottle To supply fresh toner to development unit, toner supply motor turns on. Spiral grooves help toner to move towards bottle exit. Toner supply Motor Slide 66...
  • Page 67 B245-62 / PD-C4 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 Slide 67 No additional notes.
  • Page 68 B245-62 / PD-C4 Toner Density Control 1 -- Overview Toner density is controlled by both TD sensor and ID sensor. Toner is supplied when Vt is higher than Vref. Slide 68 There are four toner-density control modes set by SP 2921. However, SP 2921 should almost always be set to 0.

  • Page 69: Toner Density Control

    B245-62 / PD-C4 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...
  • Page 70 B245-62 / PD-C4 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.
  • Page 71 B245-62 / PD-C4 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.
  • Page 72 B245-62 / PD-C4 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.
  • Page 73 B245-62 / PD-C4 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 »...
  • Page 74 B245-62 / PD-C4 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 75 B245-62 / PD-C4 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 76: Toner Near-End/End Detection

    B245-62 / PD-C4 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 77: Service Training

    B245-62 / PD-C4 B245-62 Service Training 12. Image Transfer and Paper Separation Slide 77 No additional notes.

  • Page 78: Image Transfer And Paper Separation

    B245-62 / PD-C4 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.
  • Page 79 B245-62 / PD-C4 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). Slide 79 No additional notes.

  • Page 80: Transfer Current

    B245-62 / PD-C4 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 81 B245-62 / PD-C4 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 tray, by-pass tray, and transfer roller cleaning can be adjusted.

  • Page 82: Transfer Roller Cleaning

    B245-62 / PD-C4 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.
  • Page 83 B245-62 / PD-C4 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.) Slide 83 No additional notes.
  • Page 84 B245-62 / PD-C4 B245-62 Service Training 13. Drum Cleaning and Toner Recycling Slide 84 No additional notes.

  • Page 85: Drum Cleaning

    B245-62 / PD-C4 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 86: Toner Recycling

    B245-62 / PD-C4 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. Slide 86 Toner picked up by the toner collection coil, is transported to the opening in the side of the PCU.
  • Page 87 B245-62 / PD-C4 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...
  • Page 88 B245-62 / PD-C4 B245-62 Service Training 14. Paper Feed Slide 88 No additional notes.
  • Page 89 B245-62 / PD-C4 Overview By-pass tray Paper tray Built-in paper tray: 250 sheets Friction pad and feed roller system Bypass tray: Up to 100 sheets Slide 89 The paper tray holds 250 sheets. The paper tray feed stations use a friction pad system.
  • Page 90 B245-62 / PD-C4 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...

  • Page 91: Feed And Separation

    B245-62 / PD-C4 Feed and Separation Paper Feed Roller Friction Spring Feed roller and friction pad feed system. The pressure from friction pad is not adjustable. Slide 91 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 92 B245-62 / PD-C4 Hook Slider Tray Lift Projection When tray is closed, projection on copier frame pushes slider off bottom plate hook. Slider is on bottom part of tray. After slider comes off, compressed springs lift bottom plate. Slide 92...
  • Page 93 B245-62 / PD-C4 Paper End Feeler Paper End Sensor Detection Paper end sensor: Feeler falls through a slot in the bottom plate when there is no paper. Slide 93 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 94 B245-62 / PD-C4 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"...
  • Page 95 B245-62 / PD-C4 – 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.

  • Page 96: Side Fences

    B245-62 / PD-C4 Side Fences Stoppers Side fences have stoppers to prevent them from bending when a full tray is pushed in too strongly Slide 96 More on Side Fences If the tray is full of paper and it is pushed in strongly, the fences may deform or bend.
  • Page 97 B245-62 / PD-C4 Registration Registration clutch: Transfers drive from main motor to registration roller. SP 1003: Adjusts amount of buckle at registration roller to prevent skew. SP 1903: Adjusts amount of boost from feed roller to help get paper feed started after registration (by-pass only).
  • Page 98 B245-62 / PD-C4 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: Paper feed timing. (Adjusts buckle at the registration roller to prevent skew.) SP 1903: Feed clutch boost after registration...
  • Page 99 B245-62 / PD-C4 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 No additional notes.
  • Page 100 B245-62 / PD-C4 B245-62 Service Training 15. Fusing Slide 100 No additional notes.
  • Page 101 B245-62 / PD-C4 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 Spring Slide 101 No additional notes.

  • Page 102: Fusing Unit Drive

    B245-62 / PD-C4 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 timing belt. Fusing unit drive gear disengages when the cover is open for...
  • Page 103 B245-62 / PD-C4 Fusing Entrance Guide Shaft If the paper creases in the fusing unit, shift the guide by moving the screws to the inner holes. Slide 103 The entrance guide is adjustable for paper thickness to prevent creasing. The outer screw holes on each side are used as the default setting.
  • Page 104 B245-62 / PD-C4 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.

  • Page 105: Fusing Temperature Control

    B245-62 / PD-C4 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.
  • Page 106 B245-62 / PD-C4 Fusing Temperature Control 2 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)

  • Page 107: Overheat Protection

    B245-62 / PD-C4 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.
  • Page 108 B245-62 / PD-C4 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".
  • Page 109 B245-62 / PD-C4 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.
  • Page 110 B245-62 / PD-C4 B245-62 Service Training 16. Troubleshooting Slide 110 No additional notes.

  • Page 111: Special Tools And Lubricants

    B245-62 / PD-C4 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 Slide 111 Grease Barrierta S552R is temperature resistant. Use it on fusing unit drive...

  • Page 112: Memory All Clear

    B245-62 / PD-C4 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 Slide 112 More on Memory Clear This is only done after replacing the NVRAM or recovering from NVRAM problems.
  • Page 113 B245-62 / PD-C4 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. Slide 113 No additional notes.
  • Page 114 B245-62 / PD-C4 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. Slide 114 There are four levels of service call conditions.

  • Page 115: Self Diagnostics

    B245-62 / PD-C4 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.
  • Page 116 B245-62 / PD-C4 SMC Print SP 5990: Outputs machine status lists 001 All (Data List) 002 SP (Mode Data List) 003 User Program 004 Logging Data 005 Big Font » The output given by the menu "Big Font" is suitable for faxing.
  • Page 117 B245-62 / PD-C4 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 118 B245-62 / PD-C4 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...
  • Page 119 B245-62 / PD-C4 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 120 B245-62 / PD-C4 Free Runs SP 4013: Scanner (with lamp on) SP 5802: Scanner and printer SP 5901: Printer Slide 120 No additional notes.

  • Page 121: Other Troubleshooting Tools

    B245-62 / PD-C4 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 122 B245-62 / PD-C4 B245-62 Service Training 17. Environmental Conservation Technology for Environmental Conservation Energy Saving Paper Saving Slide 122 No additional notes.
  • Page 123 B245-62 / PD-C4 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 PD-C4 PD-C3 1. QSU - Reduction of warm-up time (Energy 2. Hybrid QSU...
  • Page 124 B245-62 / PD-C4 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.
  • Page 125 B245-62 / PD-C4 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.
  • Page 126 B245-62 / PD-C4 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.
  • Page 127 B245-62 / PD-C4 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...
  • Page 128 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. Slide 128...
  • Page 129 B245-62 / PD-C4 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.
  • Page 130 B245-62 / PD-C4 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...
  • Page 131 B245-62 / PD-C4 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)
  • Page 132 B245-62 / PD-C4 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 Slide 132 No additional notes...
  • Page 133 B245-62 / PD-C4 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.
  • Page 134 B245-62 / PD-C4 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...
  • Page 135 B245-62 / PD-C4 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.
  • Page 136 B245-62 / PD-C4 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 mode immediately.
  • Page 137 B245-62 / PD-C4 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 138 B245-62 / PD-C4 End of Course Slide 138 No additional notes.

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