Page 1 B246 SERIES TRAINING COPIER ENGINE PRODUCT OUTLINE The model will be introduced to the class. The optional peripherals will be introduced to the class. The product concept, sales points, and targets will be presented.
Page 2 Basic Information about the B246 Series...
Page 3 How many Models in the Series? Six models B246/B250: 55 cpm B248/B252: 65 cpm B249/B253: 75 cpm B250, B252, B253 contain the printer/scanner unit as a standard component. The printer/scanner unit is an option for the B246, B248, and B249. The copy speeds are for A4/LT LEF.
Page 4: Product Appearance
Product Appearance ARDF Optional Cover Interposer (standard equipment) Optional Optional Booklet Finisher Three paper trays (standard equipment) PRODUCT APPEARANCE The first few slides illustrate what the machine looks like, with some of the options connected. Here we see a finisher and an LCT attached. The ARDF (capacity: 100 sheets) is standard equipment for this model, not an option.
Page 5 Interposer Tray This slide shows how cover sheets are fed into the paper feed path between the mainframe and the finisher. The cover interposer allows cover sheets to be inserted at the times selected by the users. It is installed between the mainframe and the finisher, but is like an ADF, feeding cover sheets into the paper feed path between the copier and the finisher.
Page 6 Product Appearance Optional Mailbox (nine bins) Optional Z-folding unit Optional Booklet Finisher PRODUCT APPEARANCE Here, the cover interposer is replaced with a nine-bin mailbox. A z-folding unit is also installed. This can only be used with a finisher (B700 or B701, not the B706).
Page 7 Paper Path to the Mailbox Entrance Junction Gate Proof Tray Junction Gate (Inside the Mailbox) (Inside the Finisher) In this model, the mailbox is connected to the optional finisher, not to the main copier. This is unusual. The proof tray junction gate diverts the paper either out to the proof tray or into the finisher for various stapling, shift sorting, or folding operations.
Page 8 What Options Does the Machine Have?
Page 9: Engine Options
Engine Options A3/DLT Kit for Tray 1: Same as the B140 series Tab Sheet Kit: Same as the B140 series This can be installed at any time in paper tray 2 or 3 to let it feed tab sheets. Large Capacity Tray (LCT): Same as the B140 series LG/B4 Kit for the LCT: Same as the B140 series Copy Tray: Same as the B140 series Cover Interposer: Same as the Venus-C1 (almost the same as...
Page 10 This finisher contains a jogger mechanism for z-folded output. But the z-folding unit cannot be attached to this finisher when installed on the B140/B246 series. There are three types of finisher for this model. A range of hole punch units is available for each finisher.
Page 11 Z-folding unit: This unit puts two folds in the output before feeding it out. B140 series: Uses the B660-17, -26, -27 z-folder B246 series: Uses the B660-57, -66, -67 z-folder, not the same as the B140 series. Punching and z-folding cannot both be done in the same job.
Page 12 Other Engine Options Media link board: New Copy connector kit: New Copy tray: Same as the B140 series The user must install a finisher, a mailbox, or this copy tray. Data Overwrite Security (DOS) unit: Same as the B140 series Copy Data Security Unit: New Key counter USB Host Interface: New...
Page 13: Controller Options
Controller Options Printer/scanner kit: New B250, B252, B253 contain the printer/scanner unit as a standard component. The kit contains an SD card with the scanner/printer firmware, a USB/Ethernet board, and a 256-MB memory DIMM. PostScript3 kit: New Interfaces: Only one of these can be installed at the same time: IEEE1284 interface IEEE1394 interface IEEE802.11b interface...
Page 14 Positioning MT-C1c MT-C1c 75CPM 75CPM 75CPM 75CPM 75CPM 75CPM 75CPM 75CPM 75CPM 75CPM 75CPM 75CPM 75CPM 75CPM 65CPM 65CPM 65CPM 65CPM 65CPM 65CPM 65CPM 65CPM MT-C1b MT-C1b 60CPM 60CPM 60CPM 60CPM 60CPM 60CPM M-C2b M-C2b 55CPM 55CPM 55CPM 55CPM 55CPM 55CPM 55CPM 55CPM...
Page 15: Sales Points
Sales Points Improved Usability Large WVGA display (8.5 inch W-VGA panel, 800x480) Reduced steps for LDAP search “Simplified display” button: Displays fewer functions. Login/Logout Hardware Key Better access for user authentication Productivity Two-sided scanning ADF: Faster two-sided copying Security Copy Data Security Unit Data Overwrite Security unit Authentication Quick Start: 30 seconds to warm up...
Page 16 Faster Warm-up To decrease warm-up time, a smaller number of steps is done immediately after the machine power is turned on. These are the steps. Drum potential sensor calibration Development bias adjustment Grid voltage adjustment Laser diode power adjustment The number of steps is controlled by SP 3904. The default is 0 (the minimum number of steps is done), and the charge corona wire is not cleaned.
Page 17 Reliability and Service Targets Average Monthly Copy Volume B163: 25 k B140: 30 k B141: 50 k Maximum Monthly Copy Volume: 150 k PM Interval: 300 k EM Interval: 100 k MCBC: 75 k Estimated Unit Life: 9000k prints or 5 years Time necessary to install the machine: 30 minutes for the main copier.
Page 18: Target Yields
The toner and developer can be used with the B064 and B140 series. The OPC drum is new and cannot be used with the B064 and B140 series. TARGET YIELD Toner yield is based on a Ricoh 6% A4 chart under normal operating conditions.
Page 19: Copier Engine
B246 SERIES TRAINING COPIER ENGINE SPECIFICATIONS This section will take a quick look at the important specifications.
Page 20 Specifications - 1 Copying Speed (A4/LT LEF) B246/B250: 55 cpm B248/B252: 65 cpm B249/B253: 75 cpm First Copy Time (A4/LT LEF, Tray 1, face up, platen mode) B246/B250: 4.2 s, B248/B249/B252/B253: 3.5 s Warm-up Time Less than 30 s from auto off mode, and from energy saver mode First Copy Time Face-down is slower...
Page 21 Specifications - 2 ADF capacity: 100 sheets (12 mm stack thickness) Original size (ADF) A3 – B6 (for one-sided copying) 11”x 17” – 5 1/2” x 8 1/2” Original weight 1-sided original: 40 ~ 128 g/m (11 ~ 34 lb.) 2-sided original: 52 ~ 128 g/m (14 ~ 34 lb.)
Page 22 Specifications - 3 Paper capacity Standard: 4,300 sheets With optional LCT: 8,300 sheets Paper sizes Paper tray, Duplex: A3/11" x 17" – A5 SEF/5.5" x 8.5" By-pass tray: A3/11" x 17" – A6 SEF/5.5" x 8.5" Non-standard sizes • Width: 100 – 305 mm (4" x 12") •...
Page 23 Specifications - 4 Output Tray Capacity: A4/8.5" x 11" and smaller: 500 sheets B4 and larger: 250 sheets RAM: 256 MB (expandable to 512 MB) HDD: 80 GB Scan Resolution: 600 dpi Print Resolution: 1,200 dpi...
Page 24: Installation
B246 SERIES TRAINING COPIER ENGINE INSTALLATION This section explains how to install the copier and all the optional peripherals. Installing the scanner/printer controller hardware will be covered. However, installing drivers and software will not be covered in this course. Make sure the class members all get a chance to install all of the peripherals.
Page 25 Overview This section tells you what units the class will install.
Page 26 Installation Procedure – Main Units (1) Install the copier Adjust the tandem tray to the size required by the user One one machine, install the optional A3/DLT tray kit. Install the LCT Install the LG/B4 feeder kit for the LCT on one LCT before putting it in the machine Install the finisher but do not dock it to the machine.
Page 27 Installation Procedure – Main Units (2) Install punch units inside the finishers Make sure you install the correct type of punch unit for each finisher. Install the nine-bin mailbox This must be a machine with a B700/B701 finisher You cannot install the mailbox on the same machine as a cover interposer.
Page 28 Important Points about Installation: Copier These next few slides will explain the important points about installation. Go over these points with the class. Then the class will install their machines.
Page 29: Development Unit
Development Unit Before you start work on the development unit, you must check if there is a toner bottle installed. If there is a toner bottle, remove it. If you do not do this, the toner bottle holder will be damaged during the installation procedure.
Page 30 Development Unit Lot Number Don’t lose the developer bag - you will need the lot number later on in the installation. Removing and Filling the Development Unit, step 12 You have to input the developer lot number as part of the developer/process control initialization procedure - we shall see later.
Page 31 Development Unit Do not forget to rotate the shutter back down after putting the development unit back. Otherwise, the door will not close. Removing and Filling the Development Unit, step 14 So, if the door wont close, don’t try to force it. Maybe someone forgot to put the shutter back in the correct position.
Page 32 Development Unit Correct Incorrect This step ensures that the gears mesh correctly. Reinstalling the Development Unit Follow the instructions on this page carefully when putting the development unit back. This ensures that the gears mesh properly.
Page 33 When adding new developer in a machine already installed, use SP 2801. Do not use 2801 at installation. Initializing the Drum Settings (B140/B246 Series) Go over the points on the slide. After the power is switched on, auto process control is done. In a new machine, if SP2963 is not done first, auto process control will not initialize the machine correctly.
Page 34: Tandem Tray
Tandem Tray Check with the customer what paper size they wish to use. The customer cannot change the paper size themselves. If necessary, set up the tandem tray for a different paper size. Then, set SP 5959 001 to the correct paper size. Tandem Tray If the user doesn’t wish to use the default paper size, the technician has to adjust the tray and change an SP setting.
Page 35 SP Modes SP5302: Time zone setting SP5812 001~004: Service and supply Telephone Number Settings SP5841 001: Supply Name Setting – Toner Name Setting: Black SP codes The toner name appears on the display when the user presses the Inquiry button on the user tools screen.
Page 36: Downloading Stamp Data
Downloading Stamp Data Normally only needed after replacing the hard disks. Must also be done during the machine’s installation procedure. Copy from the firmware using SP5853. Service Manual, section 5.4.1 Stamp data is on the hard disks. It is on both hard disks, and the data on each disk must be exactly the same.
Page 37 Installation: Copier...
Page 38 Install your Copiers Installation Procedure Service manual, section 1.2.2 Do the procedure in the manual. Obey all warnings and cautions in the procedure. Do not install the options at this time.
Page 39 Important Points about Installation: Options These next few slides will explain the important points about installation. Go over these points with the class. Then the class will install the options.
Page 40 A3/DLT Kit for the Tandem Tray Install in tray 1 if the user needs A3/DLT in tray 1, and does not require the tandem tray. Then, set SP 5959 001 to the correct paper size. Service manual, section 1-3 Don’t forget to change the SP mode setting after changing the size. The users do not have a user tool to do this if you forget.
Page 41: Installing The Lct
Installing the LCT Make sure that the paper size is suitable for the user. Users cannot adjust the paper size for the LCT themselves. If it is not, move the side fences (see the B473 manual), then change SP 5959 005. If the user wants to put B4 or Legal paper in the LCT, you have to install the B4/LG feeder kit, then change SP 5959 005.
Page 42 Installing the B706 Finisher After installing the finisher, input the staple types with SP 5841. If you install the cover interposer, wait until after you install the cover interposer before you dock the finisher to the machine. Service manual, section 1-10...
Page 43 Installing the B700/B701 Finishers Move the finisher slowly, to avoid bending the entrance guide plates. After installing the finisher, input the staple types with SP 5841. For the B700 finisher, to use booklet stapling, you must make sure that the center-position stapling option is displayed (see below). If it is not, select the center-position stapling mode with a user tool.
Page 44 Installing the B700/B701 Finishers If you install the cover interposer, wait until after you install the cover interposer before you dock the finisher to the machine.
Page 45 B700/B701 Finishers – Auxiliary Trays During the installation, the auxiliary trays are stored in a pocket at the back of the finisher. Make sure that the customer understands the purpose of these trays. The service manual contains an explanation. Service manual, section 1-14, Auxiliary Trays...
Page 46 B700/B701 Finishers – Jogger Unit Set SP 6118 to 1 after you install the B703 jogger unit option.
Page 47 Punch Units Make sure that you install the correct punch unit for each finisher. The B700 and B701 use the same punch unit, but the B706 uses a different one.
Page 48 Installing the Cover Interposer (B704) Use the procedure for the B704 cover interposer, not the B470. Procedure: First, prepare the finisher Attach the extensions • The procedure for the B700/B701 finisher is not the same as for the B706 finisher. Attach the cover interposer to the finisher.
Page 49 Installing the Z-folding Unit You can only install this on the B700 or B701 finisher. Procedure: Dock the z-folder to the finisher • Extend the supports at the base (see the next slide). Dock the z-folder/finisher/cover interposer assembly to the copier Test the breaker switch Service manual, section 1-13...
Page 50 Installing the Z-folding Unit Extend the feet as shown below. The Z-folding unit is not stable, with or without the feet extended. Do your work carefully; do not tilt the unit.
Page 51 Testing the Breaker Switch on the Z-Folder The breaker switch is at the lower right side of the z-folder. You must disconnect the unit physically from the machine, but not electrically. Make sure that it is set to the right (this is the ‘on’ position). Make sure that the main power switch of the copier is off.
Page 52 Installing the Mailbox (B762) Use the procedure for the B762 cover interposer, not the B471. If the cover interposer is installed, you must remove it before you install the mailbox. Service manual, section 1-18...
Page 53: Installation Options
Installation: Options...
Page 54: Install The Options
Install the Options - 1 B475 A3/DLT kit for the tandem tray: Section 1.3 B473 LCT: Section 1.4 B474 LG/B4 kit: Section 1.5 B700/B701 finisher: Section 1.14 Do not dock it to the machine at this time. B704 cover interposer: Section 1.16 B660 z-folding unit: Section 1.13 Dock the B700/B701 finisher/cover interposer/z-folder assembly to the copier.
Page 55 Install the Options - 2 Other options: B756 copy tray: Section 1.19 B842 copy connector kit: Section 1.21.3 Brackets for key card and key counter: Section 1.20...
Page 56 Important Points about Installation: Printer/Scanner and Options These next few slides will explain the important points about installation. Go over these points with the class. Then the class will install the options.
Page 57 What are the Slots on the Controller Box? On the controller box, there are 5 slots (A1, A2, B1 to B3) for boards, and 3 slots (C1 to C3) for SD cards. Tandem The function of each slot File Format B1 B2 Converter is shown on the cover.
Page 58 What are the Board slots for? A1: Copier connection kit A2: File format converter B1: USB Host interface B2: Interface option (one of five possible choices) IEEE1284 Interface (Centronics) IEEE 1394 Interface (FireWire) IEEE 802.11b Interface (Wireless LAN) Bluetooth Interface Cumin-M (NRS interface) B3: Gigabit Ethernet/USB card This slot already contains an Ethernet/USB card, pre-installed at...
Page 59 What are the SD card slots for? - 1 C1: System card. DO NOT REMOVE, OR THE MACHINE WILL NOT WORK C2: Applications: This is the only slot for applications. To install more than one application, you must merge the software onto one card.
Page 60 What are the SD card slots for? - 2 This is used for installing new firmware. It is also used during the installation procedure for the browser unit. • The machine copies firmware from the SD card to the hard disk during the procedure. •...
Page 61 Storing the Original SD Cards after Merging After you merge applications onto one SD card, the original card is de-activated. It can be re-activated with the ‘Undo Exec’ procedure in section 1.23.1 But the customer must keep it as a proof of purchase.
Page 62 Installing the Printer/Scanner Kit The printer/scanner option contains: Printer/scanner firmware SD card 256MB memory DIMM A 256 MB RAM DIMM must be installed in the empty memory slot. SP 7836 shows the size of the memory installed in the machine at this time. Service manual, section 1.24.3 If the extra memory is not installed, the machine will not recognize the printer/scanner option.
Page 63 Installing the Printer/Scanner Kit Note the correct way to install a DIMM Service manual, section 1.22.2 Service manual, section 1.22.2...
Page 64 Installing the Printer/Scanner Kit After installation, you must change SP 5985 001 and 002 from '0' to '1‘, then turn the main power switch off and on. If you do not do this, the machine will not be able to use the Ethernet and USB interfaces.
Page 65 Installing the Data Overwrite Security Unit Make sure that you have a type C unit. If you have the wrong type, you must replace the NVRAM inside the copier before you install the correct DOS unit. After you install the unit, print an SMC report and check that you have installed the correct type.
Page 66 Installing the Browser Unit During the installation procedure, you put an SD card in slot C3. Then, the machine copies some software from the SD card. After installation, you must remove the SD card from slot C3. Service manual, section 1.24.12...
Page 67 Installing the Copy Data Security Unit This is an IPU board. When the machine is shipped from the factory, the IPU does not have this application. You must always install a new IPU board when you install the Copy Data Security Unit option. Then, enable the Copy Data Security feature with a user tool.
Page 68 Installation: Printer/Scanner and Options Service manual, section 1.24...
Page 69 Install the Options Use the procedures in the service manual, section 1.24...
Page 70: Updating The Firmware
Updating the Firmware...
Page 71: Firmware Update
Firmware Update The procedure uses SD cards. Use the C3 card slot only. Procedure: Service manual, section 5-4-1 If power is turned off during the procedure, download the firmware again. If an error occurs, see the error code and do the instructions in the error code table Also see section 4-1-3 for...
Page 72: Copier Engine
B246 SERIES TRAINING COPIER ENGINE OPERATION This section will cover important points about operation, the SP modes that are related to operation, and some of the user tools. Have the class try out the features covered in this section.
Page 73: Main Components
Main Components Operating Instructions – About the Machine - Getting Started – Guide to Components Make sure that the class is familiar with the components of the machine. Note the following: 1. ADF: This also acts as the platen cover in book scanning mode. When scanning a two-sided document, the ADF scans both sides of the original at the same time without inverting 8.
Page 74: Operation Panel
Operation Panel Operating Instructions – About the Machine - Getting Started – Control Panel Ask the class to study this section of the operation manual, to make sure that they understand what all the buttons do.
Page 75: Display Panel
Display Panel Operating Instructions – About the Machine - Getting Started – Display Panel Ask the class to study this section of the operation manual. Note the user function keys. These can be programmed with the following user tool. User tools - Copy/Document Server Features - General Features – Customize Function: Copier The General Settings Guide, Copy/Document Server Reference, Printer Reference, and Scanner Reference operation manuals also contain sections about the display...
Page 76: Simplified Display
Simplified Display Here is an example of the simplified display.
Page 77 Copying onto Tab Sheets - 1 With the user tools, specify which tray contains the tab stock, and the index tab dimensions System Settings - Tray Paper Settings - Paper Type: Tray 2 or 3 You cannot use tray 1 for tab stock. Install the optional tab sheet tray in the selected tray.
Page 78 Copying onto Tab Sheets - 2 The side without the tabs must feed into the machine first. Take care which way up you put the stack of tab sheets in the tray.
Page 79: Original Types
Original Types Five main original types Each original type has four sub-types Select with User Tools - Copy/Document Server Features - General Features - Copy Quality One of the four sub-types is a ‘custom setting’ mode, which can be customized with SP settings Operating Instructions - Copier Reference - Copying - Copier Functions - Selecting Original Type Go over the points on the slide.
Page 80 Enlargement/Reduction Processes Base point when scanning on the exposure glass Exposure Glass (Book Scanning) Base point when scanning with the ADF Note the different results Exposure glass (book scanning) - data is lost at the bottom edge ADF - data is lost at the top edge Operating Instructions - Copier Reference - Copying - Copier Functions - Preset Reduce/Enlarge Enlargement and reduction are similar to other models.
Page 81 Stapling The types of stapling available depend on which finisher has been installed, and on the user tool settings. If the required stapling type is not displayed, change the following user tool setting: Copy/Document Server Features - Input/Output - Staple Position Operating Instructions - Copy Reference - Copying - Copier Functions - Stapling Try various staple position settings (inside the red circle on the slide).
Page 82 Punch If the required punching method is not displayed, change the following user tool setting: User Tools – Copier/Document Server – Input Output – Punch Type Punching is not allowed with z-folding. Operating Instructions - Copier Reference - Copying - Copier Functions - Punch Try various punch position settings (inside the red box on the slide).
Page 83: Front Cover
Making Covers Front Cover Front and Rear Covers Operating Instructions - Copier Reference - Copying - Copier Functions - Covers Front and back cover modes are available. The procedures are similar. Select the trays that you want to feed the cover paper from. User Tools - System Settings - Tray Paper Settings –...
Page 84: Document Server
Document Server Files are deleted 3 days after they were stored. Change with System Settings - Administrator Tools - Auto Delete File in Document Server Operating Instructions – Copier/Document Server Features - Document Server - Using the Document Server The Document Server enables you to save documents on the hard disks and then print them and delete them as you want.
Page 85: Energy Saver Modes
Energy Saver Modes After 60 seconds (energy saver mode): Fusing unit temperature falls a little; recovery time is less than 3 seconds. After 60 seconds (low power mode): Fusing unit temperature falls a little more; recovery time is 10 seconds. After 60 seconds (auto off mode): Fusing lamp switched off ;...
Page 86 Energy Saver Modes The default values of the timers are all the same (one minute; see the previous slide). The timers can be adjusted with user tools (System Settings > Timer Settings). Because of this, the machine goes into auto off mode after 1 minute.
Page 87 SP Modes Registration 1001: Paper Tray Leading Edge Registration 1002: Paper Tray Side-to-Side Registration 4010: Scanner Leading Edge Registration 4011: Scanner Side-to-Side Registration 6006: ADF Registration Margins 2101: Printing Erase Margin 4012: Scanner Erase Margins Scanner SP 1005: Scanner Mode Erase Margin These SPs are related to machine operation.
Page 88 SP Modes Magnification 2909: Print Engine Main Scan Magnification 2910: Print Engine Sub Scan Magnification 4008: Scanner Sub Scan Magnification 6017: ADF Magnification Note the difference between SP 2910 and 4008, as mentioned on the slide. The manual is not too clear about this.
Page 89 SP Modes Originals 4303: Determines what happens when the original size sensors in the scanner cannot detect the size 5126, 6016: Determines what original sizes are detected in the ADF, for certain sizes that are hard to distinguish • See the Document Feeder section for details.
Page 90 SP Modes Paper Trays 5047: Paper printed one one side - display which tray it is in 5112: Non-standard paper sizes in universal trays, enabled/disabled 5129: Sets the paper size that the machine detects when the 8 x 13 dial setting on a paper cassette is used (LT/DLT version only).
Page 91 SP Modes 5024: Display units (mm/inches) 5307: Daylight saving time – day to start and end, and number of hours to change 5106: ADS - Image density of the central position 5212: Adjusts the position of page number printing in duplex mode 5404 001: Resets all user code counters 5913: Wait time when switching between applications...
Page 92: Copier Engine
B246 SERIES TRAINING COPIER ENGINE MACHINE COMPONENT OVERVIEW The components will be discussed. The paper feed path and copying process will be outlined. The machine's organization and overall PCB structure will also be covered.
Page 93: Major Components
Major Components Drum Fusing Unit Duplex Unit Paper Trays Bypass Unit Service manual, pages 6-1 and 6-2 Point out the following: ADF: This is built in. there is no inverter. The reverse sides of two-sided originals is scanned using a CIS built into the ADF. The drum is similar to the Mojito.
Page 94 Paper Path - With Cover Interposer Cover Interposer Finisher Service manual, page 6-3 Demonstrate the following: Original feed path - there is no inverter Paper input paths from LCT, bypass, and standard trays Paper output paths to finisher (proof tray and lower feed out slot for trays 1 and 2) Demonstrate how the cover interposer fits into the paper path.
Page 95 Cover Interposer Capacity 200 sheets Paper weight up to 216 g/m Feed belt and separation roller system This diagram is a close-up of the cover interposer’s feed-in path.
Page 96 Paper Path - With Mailbox Service manual, page 6-4 This diagram shows the machine with a mailbox installed instead of a cover interposer. Demonstrate the paper exit path up to the mailbox. There are some more details on the next slide.
Page 97 Paper Path to the Mailbox Entrance Junction Gate Proof Tray Junction Gate (Inside the Mailbox) (Inside the Finisher) In this model, the mailbox is connected to the optional finisher, not to the main copier. This is unusual. The proof tray junction gate diverts the paper either out to the proof tray or into the finisher for various stapling, shift sorting, or folding operations.
Page 98: Drive Layout
Drive Layout Service manual, page 6-5 This diagram shows the motors. At this time, introduce the component layout diagrams and the point-to point diagram. Also hand out copies of the component list (components.doc). This list explains what each component in the machine does.
Page 99: Board Structure
Board Structure Service manual, section 6.2 This section lists the functions of the boards inside the machine. The BCU is the main board. The controller board interfaces the machine with computer networks, and connects to all the printer/scanner options and memory devices. Software upgrades are also done through an SD card slot on this board.
Page 100: Copy Process Overview
Copy Process Overview Service manual, section 6.3 This is very similar to the Mojito and SP5. There is only one development roller in this model. Process control includes a new step - development bias adjustment.
Page 101 Replacement Do the procedures in section 3.12 of the service manual. Obey all notes and cautions in the manual. Controller Remove the NVRAM from the old board and put it on the new board. Make sure that you put the system SD card in slot C1 after reassembly, or the machine will not operate.
Page 102: Nvram Replacement
NVRAM Replacement If you change a defective NVRAM, you can put back the settings to their previous condition. But you can only do this if you made a backup of the NVRAM to an SD card on a previous visit. But you cannot get back settings that were made after that visit.
Page 103: Hard Disk Removal
Hard Disk Removal Remove the hard disks. After installing new disks: Format them with SP 5832 001 (recommended but not required) Copy the stamp data to the disks from the firmware: SP5853. Then switch the machine power off/on. Service manual, section 3.12.7 Have the class remove and replace the hard disks.
Page 104 Hard Disk Removal Explain to the customer that the following information stored on the HDD is lost when the HDD is replaced: Document server documents Custom-made stamps Document server address book The address book and document server documents (if needed) must be input again.
Page 105: Disposal Of Hdd Units
Disposal of HDD Units Never remove an HDD unit from the work site without the consent of the client. If the customer has any concerns about the security of any information on the HDD, the HDD must remain with the customer for disposal or safe keeping.
Page 106: Copier Engine
B246 SERIES TRAINING COPIER ENGINE DOCUMENT FEEDER The ARDF is a standard component of the machine. This section of the course will explain the ARDF’s mechanisms.
Page 107 Entrance Roller Overview Interval Feed Belt/Separation Roller Sensor CIS (Contact Image Sensor) Scanning Roller Pre-scanning Roller No inverter - reverse sides are scanned by a CIS built into the ADF Exposure Skew correction at two places Glass The most important points are on the slide. Here is a brief overview of how the ADF works.
Page 108 Drive Layout Bottom Plate Motor Pick-up Roller Lift Motor Feed Motor Exit Motor Transport Motor Service manual, section 6.4.2 The diagram looks like a plate of spaghetti. However, the manual explains which motor is driving what roller.
Page 109: Pick-Up Roller
Pick-up Roller Original Feed Motor Pick-up Roller Motor Pick-up Roller HP Sensor Pick-up roller motor: Drops the pick-up roller onto the stack of originals Feed motor: Rotates the pick-up roller Service manual, section 6.4.3 Just after the original set sensor detects an original, the pick-up roller motor switches on, to drop the pick-up roller onto the original stack.
Page 110 Bottom Plate Bottom Plate Lift Lift Motor The bottom plate lift motor lifts the bottom plate at the following times: Just after the original set sensor detects an original When some originals have been fed, and the top of the stack needs lifting Service manual, section 6.4.4 The main points are on the slide.
Page 111 Original Separation and Transport FRR with feed belt Simplified feed path (no inverter mechanism) Service manual, section 6.4.5 FRR with feed belt is a standard original separation technique. Details can be found in the core technology manual. Service manual, section 6.4.6 Full details of the feed path are in the manual.
Page 112: Skew Correction
Skew Correction Skew Correction Entrance Sensor Roller Feed Roller Interval Sensor Pre-scanning Roller Service manual, section 6.4.7 Skew correction is done at the two circled locations. Skew correction sensor/entrance roller: When the sensor detects the leading edge of the original, the roller stops for a certain period. This buckles the original and corrects the skew.
Page 113: Original Size Detection
Original Size Detection Original length and width are read when the original passes the skew correction sensor Service manual, section 6.4.8 The original width sensors cannot detect the width until the original has passed the entrance roller. Some small sizes cannot be detected by the sensors (A5SEF, B6SEF, B6LEF), because the sensor outputs for these sizes are identical (all sensors are off).
Page 114 The CIS scans the reverse side of the original, if two-sided scanning has been selected. This means that for two-sided scanning, the original feeds though the scanner one time only. The resolution is 600 dpi, the same as the CCD. The white roller below CIS is used as a white reference...
Page 115 Feed Timing and Jam Detection Skew Correction Sensor Interval Sensor Registration Sensor Exit Sensor Feed timing controlled by the skew correction and registration sensors Jam detection at the skew correction, interval, registration, and exit sensors Service manual, section 6.4.10 The service manual describes jam detection.
Page 116 Dust Detection (SP 4020) This function checks the ADF exposure glass for dust that can cause black lines in copies. If dust is detected, a message is displayed on the operation panel, but the machine does not stop. SP 4020 001: Enable/disable (default – disabled) SP 4020 002: Sensitivity adjustment SP 4020 003: Adjusts image processing parameters to remove thin vertical lines caused by dust...
Page 117 Replacement Do the procedures in section 3.13 of the service manual. Obey all notes and cautions in the manual. CIS power supply and CIS These two items must be replaced as a set REPLACEMENT Service manual, section 3.13 Have the trainees remove and replace the parts in this section. Remind them to follow all notes and cautions in the manual.
Page 118 B246 SERIES TRAINING COPIER ENGINE SCANNER The scanner mechanism will be discussed in this section. It only covers the movable scanner inside the main body of the machine, and not the CIS inside the ADF. This was covered already. Image processing is covered in the next section.
Page 119 Overview 600-dpi CCD Xenon exposure lamp Two exposure glasses Book mode, ADF mode Service manual, section 6.5.1 This is a typical CCD scanner mechanism. Point out the main components, as shown in the diagram in the manual. The USA version contains two length sensors. In this machine, there is an ADF exposure glass.
Page 120 Drive Scanner motor: Drives the scanners Scanner home position sensor: Detects when the scanner is at home position Service manual, section 6.5.2 The main points are on the slide. The scanner speed is in the service manual. It depends on the reproduction ratio. The speed is double the normal speed when returning to home position.
Page 121 Original Size Detection DF Position Sensor APS Start Sensor 1 length sensor (USA: 2 length sensors) 3 width sensors Service manual, section 6.5.3 Describe the sensors. The diagram in the service manual gives exact measurements of where these sensors are. Make sure that the class is familiar with the table of sensor output vs original size.
Page 122 Magnification Main scan: Done by image processing Sub scan: Done by changing the scanner motor or ADF feed motor speed Service manual, section 6.5.4 This is the same as for other models. Note that below 50%, the scanner cannot move fast enough, so image processing is used again - alternate lines are cut out.
Page 123 Reads reference white from the underside of the scale. Starts 15 mm in from the edge, and reads 60mm across the main scan from that point Reads reference white from the white roller opposite the CIS. Starts 20 mm in from the edge, and reads 65mm across the main scan from that point Service manual, section 6.5.5 Note the slight differences in the method.
Page 124 SP Modes Reference white scanning position adjustments SP4016: Platen mode (CCD) SP4018: ADF mode (CIS) SP 5106: Image density for the central notch in ADS mode These SPs allow you to adjust the location where the reference white is read from, in case the DF exposure glass or reference white plate is defective.
Page 125 Replacement Do the procedures in section 3.4 of the service manual. Obey all notes and cautions in the manual. REPLACEMENT Service manual, section 3.4 Have the trainees remove and replace the parts in this section. Remind them to follow all notes and cautions in the manual. Note that the copy adjustments must be done after replacing the lens block or the scanner motor.
Page 126: Image Processing
B246 SERIES TRAINING COPIER ENGINE IMAGE PROCESSING This section explains the image processing done inside this machine.
Page 127 Components in the Image Processing Circuit Data flow Signal flow SBU/CIS PCI BUS Controller Polygon Motor Service manual, section 6.6.1 This diagram shows which parts of the machine take part in image processing. The CIS is in the ADF, as mentioned earlier. It scans the reverse side of two-sided originals.
Page 128 Original Types Five main original types Each original type has four sub-types Select with User Tools - Copy/Document Server Features - General Features 1/5 - Copy Quality One of the four sub-types is a ‘custom setting’ mode, which can be customized with SP settings Service manual, section 6.6.3 The table in the service manual shows which original types are suited to each of...
Page 129: Custom Settings
Custom Settings The following items can be adjusted using the custom setting SP modes Image quality Line width correction Duplex scanning image quality There are only three sets of adjustments for the ‘custom setting’ original types. These are listed on the slide, and will be explained in the next three slides.
Page 130: Image Quality
Image Quality SP 4903 001 to 024 These SPs affect items such as MTF and smoothing Photo mode has two sets of image quality custom settings Service manual, section 6.6.4, Image Quality There are no complex MTF or smoothing SP adjustments. Just adjust these SPs, as described in the tables on the above pages.
Page 131: Line Width Correction
Line Width Correction SP 4903 080 to 094 You can strengthen the effect of line width correction with SP4904 020 to 024. Service manual, section 6.6.4, Line Width Correction These tables explain how to use the SP modes that control line width correction. The extra adjustment (SP 4904 020 to 024) will make lines even thinner if required.
Page 132 Duplex Scanning Image Quality Front side: Scanned by the CCD inside the main body of the machine SP 4901 010 to 014: one adjustment for each original mode Rear side: Scanned by the CIS in the ADF SP 4902 010 to 014: one adjustment for each original mode Adjustments are needed for the following reasons: To match the image quality of the two scans...
Page 133: Independent Dot Erase
Independent Dot Erase Affects all original types Not only the ‘custom setting’ original sub-types SP 4903 060 to 064 Service manual, section 6.6.4, Settings Adjustable for Each Original Mode These tables explain how to use the SP modes that control independent dot erase. This adjustment affects all original type settings, not only the ‘custom settings’...
Page 134: Background Erase
Background Erase Affects all original types Not only the ‘custom setting’ original sub-types SP 4903 070 to 074 Service manual, section 6.6.4, Settings Adjustable for Each Original Mode These tables explain how to use the SP modes that control background erase. This adjustment affects all original type settings, not only the ‘custom settings’...
Page 135 Other SPs 2111: FCI shading detection (only when using the printer controller) 2114: Edge processing (only when using the printer controller) Look at the SP tables, and try to study the effects of these SPs on various types of image.
Page 136 Scanner and Fax Mode SPs SP 4550 to 4585 These SPs are available to adjust image processing for fax and scanner modes.
Page 137: Laser Unit
B246 SERIES TRAINING COPIER ENGINE LASER UNIT This section explains how the laser unit converts the image data signal into laser pulses for writing the latent image on the OPC.
Page 138 Overview Four laser diodes, six-sided mirror 24 scan lines per mirror rotation Up to 5 levels per pixel (using Pulse Width Modulation only) 1200 dpi Fixed at 1200 dpi, so no beam pitch adjustments Service manual, section 6.7.1 The main points are on the slide. More detailed specs are in the service manual. Normally, only two levels are used.
Page 139: Optical Path
Optical Path Service manual, section 6.7.2 This is a standard laser optics unit, with only one laser synch detector. The Core Technology Manual has more information on laser optics components.
Page 140 LD Unit Service manual, section 6.7.3 This diagram shows the laser diode unit with the four laser diodes.
Page 141 1,200-dpi Laser Printing Sub Scan Main Scan Service manual, section 6.7.3 The four main scan lines overlap slightly. The close spacing of the dots provides 1,200 dpi resolution.
Page 142 Cooling Laser Diode Unit Polygon Mirror The fan is always on when the mirror is turning. The mirror only stops in auto off or night mode, or when the machine is switched off. Service manual, section 6.7.4 The main points are on the slide.
Page 143: Safety Switch
Safety Switch Front Door Inter-lock SW LD5V +3.3V LVDS MGAVD AARE RECEIVER DATA1 DATA1- DATA1+ +5V +3.3V When the front cover is open, the 5V line to the laser diodes is disconnected. Switch name: Front door safety switch Service manual, section 6.7.5 Go over the points on the slide.
Page 144 Replacement Do the procedures in section 3.5 of the service manual. Obey all notes and cautions in the manual. REPLACEMENT Service manual, section 3.5 Have the trainees remove and replace the parts in this section. Remind them to follow all notes and cautions in the manual. Especially, draw attention to the laser beam cautions.
Page 145: Process Control
B246 SERIES TRAINING COPIER ENGINE PROCESS CONTROL In this section, process control will be described.
Page 146: Toner Supply Control
Process Control Components Toner Supply Control TD sensor ID sensor Image pixel count Latent Image Control Grid voltage Drum potential sensor Laser diode power Development bias In this machine, process control consists of the following. Toner supply control, controlled by the TD sensor, the ID sensor, and the image pixel count.
Page 147 Short Process Control To decrease warm-up time, a smaller number of steps is done immediately after the machine power is turned on. The number of steps is controlled by SP 3904. The default is 0 (the minimum number of steps is done), and the charge corona wire is not cleaned.
Page 148 Auto Process Control Drum potential sensor calibration Development bias adjustment Grid voltage adjustment Laser diode power adjustment ID sensor calibration (not done during Short Process Control) Toner density sensor reference voltage calibration (not done during Short Process Control) Service manual, section 6.8.11, What Happens at Power On The machine automatically does the operations listed this slide (in the order that is listed).
Page 149 Auto Process Control Timing Immediately after the main switch is turned on (and when it comes back from auto off mode) Process control is done if these conditions occur: • If fusing temperature is less than 100 °C • If SP 3901 (auto process control enable/disable) is on If SP 3904 is at 2, the full process control will be done.
Page 150: Drum Potential Sensor
Drum Potential Sensor Corrects drum potential sensor RA101 output for -100/-800 temperature and RA102 humidity Sensor Output Two-point calibration Linear relationship Charge - 100 V - 800 V assumed on Drum Service manual, section 6.8.11, Drum Potential Sensor Calibration This corrects the sensor output for effects of temperature and humidity. The development power pack applies two different voltages to the drum shaft.
Page 151: Development Bias Adjustment
Development Bias Adjustment A latent image is written to the drum, using the default values for development bias, grid voltage, and laser power The drum potential sensor reads the potential on this latent image. The potential (VL) should be -130V If the potential is not correct, the development bias is adjusted to make the potential correct.
Page 152: Grid Voltage Adjustment
Grid Voltage Adjustment Charge/Grid The drum potential sensor output for unexposed ) must be -800 ± 10V . areas of the drum (V If not, the grid voltage (V ) is adjusted. Service manual, section 6.8.11, Development Bias, Bias Grid, and LD Adjustment The potential on unexposed areas of the drum (V ) gradually changes during drum life.
Page 153: Ld Power Adjustment
LD Power Adjustment Laser The drum potential sensor output for the pattern (V must be -300 ± 20V . This pattern has the same density as the ID sensor pattern. If not, the laser diode power is adjusted. Service manual, section 6.8.11, Development Bias, Bias Grid, and LD Adjustment This process ensures that the ID sensor pattern is always at the same intensity, so that the TD sensor reference voltage V updates correctly.
Page 154: Id Sensor Calibration
ID Sensor Calibration Image Density Sensor Drum, No Toner Sensor Output 4.0 ± 0.2 V Reflected Light Adjusts the output when light is reflected from the bare drum to 4.0 ± 0.2V This is known as V Service manual, section 6.8.11, ID Sensor Calibration The ID sensor is used for toner supply control.
Page 155 TD Sensor Reference Value The TD sensor reference value is corrected using readings from the ID sensor : From the bare drum : From the ID sensor pattern Service manual, section 6.8.11, TD Sensor Calibration This is done to keep the concentration of toner in the developer as stable as possible.
Page 156 SP Modes 2001: Charge corona unit grid voltage 2201: Development bias voltage 2962: Manually executes a process control Process control must be enabled with SP 3901 or it will not work. 2966: Process control and corona wire cleaning interval 3001 002: Manually initializes the ID sensor 3103: ID sensor output display 3901: Auto process control enable/disable 3902: Process control data display...
Page 157 B246 SERIES TRAINING COPIER ENGINE PROCESSES AROUND THE DRUM This section describes the drum and the processes around it, including quenching, charge corona unit, drum cleaning, and toner recycling. There are a lot of fans to cool the machine. Without cooling, the extra heat generated by the increased speed of the machine could cause the toner to stick together and block the mechanism.
Page 158 Drum Unit Toner Recycling Pipe Charge Corona Unit Potential Sensor Development Drum Roller Cleaning Unit Drum ID Sensor Pick-off Pawls Transfer Belt Service manual, section 6.8.1 The main components are indicated on the slide. Go over the following points. OPC Drum (100 mm diameter) There is a Drum Potential Sensor and ID Sensor Charge Corona Unit With cleaning pads...
Page 159 Drum Ventilation Holes Grounding Brush Service manual, section 6.8.2 Note the ventilation holes and the grounding brush.
Page 160: Drum Drive Mechanism
Drum Drive Mechanism Cleaning Unit Drive Shaft Drum Drive Shaft The drum motor drives the drum Service manual, section 6.8.3 The drum motor drives the drum, through the shaft on the left of the drawing. It also drives the drum cleaning unit, through the shaft on the right. The flywheel on the drum shaft stabilizes the rotation speed.
Page 161: Charge Corona Unit
Charge Corona Unit Double-wire scorotron Grid voltage controlled to maintain copy quality Service manual, section 6.8.4 The main points are on the slide. Charge rollers are not much good for very fast machines. This is because they only contact a very narrow area of the drum. If the drum rotates quickly, it may not have sufficient charge.
Page 162: Corona Wire Cleaning
Corona Wire Cleaning Removes dust and toner Prevents low density bands on copies Motor Service manual, section 6.8.5 This mechanism removes dust from the wire to prevent pale banding on copies. The cleaner moves from front to rear and back again. Cleaning occurs on the way from front to rear.
Page 163 When is the Corona Wire Cleaned? Immediately after the machine power is turned on, if one of the following conditions occurs SP 3904 is at 1 or 2. The default is 0 (not cleaned). At the end of a job, if one of these conditions occurs: The wire was not cleaned for 24 hours or more •...
Page 164: Pick-Off Pawls
Pick-off Pawls Shaft Pawls Always contact the drum Side-to side movement during copying to prevent drum wear. Service manual, section 6.8.6 Describe the side-to-side movement mechanism and the reason for it. Remind the class of the spurs, described on the overview slide of this section.
Page 165 Cleaning Unit Overview Blade Counter blade and brush system Side-to-side movement Drum reverse rotation to clean the blade edge At the end of copy jobs Can be enabled during long jobs, using SP2- Toner Collection Coil Brush Service manual, section 6.8.7 This machine uses a brush and counter blade.
Page 166: Cleaning Blade
Cleaning Blade Side-to-side motion prevents blade edge wear and drum scratching. Lock the release lever in the upper position before transportation. Blade Service manual, section 6.8.7 The blade always contacts the drum. A cam moves it from side to side during copying, to prevent wear at any particular place.
Page 167 Drum Ventilation Drum Cooling Exhaust Fan Ozone Filter PCU Cooling If ventilation is defective, the charge on the drum will be uneven, and outputs will have uneven density. Service manual, section 6.8.8 Follow the flow of air in from the drum cooling fan, through the drum, and out through the ozone filter.
Page 168: Toner Recycling
Toner Recycling Toner Separation From Drum Unit Cleaning Unit Reusable toner passes through the sieve Re-usable toner from the drum cleaning unit goes back to the development unit. Service manual, section 6.8.9 The toner separation unit is inside the toner hopper. Toner that passes through the sieve goes into the toner hopper and on to the development unit for re-use.
Page 169: Waste Toner Collection
Waste Toner Collection - 1 Waste Toner Collection Coil Unusable toner is pushed out here Toner that cannot be used again goes to the waste toner bottle via the waste toner collection coil. Service manual, section 6.8.9 Part of the recycled toner from the drum unit cannot be reused. This slide shows how the unusable toner is pushed out to the waste toner collection coil.
Page 170 Waste Toner Collection - 2 From the toner The following goes to separation unit the waste toner bottle: All waste toner from the transfer belt cleaning unit The toner from the drum cleaning unit Waste that is rejected by toner bottle the toner separation From the transfer unit (in the toner...
Page 171 SP Modes Charge Corona Unit 2001: Charge corona grid voltage adjustments 2803: Forced charge corona wire cleaning 2804, 2966: Discussed earlier in this section SP MODES Charge Corona Unit 2001: Grid voltage was discussed in the Process Control section 2803: Forced charge corona wire cleaning Use this to clean the corona wires if cleaning is needed 2804 001: The default is enabled 2804 002: The default is every 5000 copies...
Page 172: Cleaning Unit
SP Modes Cleaning Unit 2506 001: Cleaning blade edge cleaning during multicopy jobs, enable/disable 2506 002: Interval at which multicopy jobs are stopped for blade edge cleaning 2912 001: Periodic cleaning blade edge cleaning 2912 002: Cleaning interval 2968: Forces used toner into the used toner collection bottle Cleaning Unit 2506 001: Cleaning blade edge cleaning during multi-copy jobs, enable/disable...
Page 173 Replacement Do the procedures in section 3.6 of the service manual. Obey all notes and cautions in the manual. ID Sensor After installing a new sensor, do SP 2962 (process control initialization) then initialize the sensor (SP 3001 002). After cleaning the sensor, initialize it only (SP 3001 002).
Page 174: Copier Engine
B246 SERIES TRAINING COPIER ENGINE DEVELOPMENT AND TONER SUPPLY The development process will be described. The toner supply mechanism will be described. Toner supply control maintains the correct proportion of toner in the developer mixture. The proportion of toner to developer may require...
Page 175 Overview - Development Unit One development roller Toner density control TD and ID sensors Image pixel count TD Sensor Service manual, section 6.9.1 Outline the development mechanism for this machine. Point out the following: A single-roller development system is used. In the SP5 and Mojito, a double-roller system was introduced to solve certain copy quality problems.
Page 176 Overview - Toner Hopper Toner recycling system Service manual, section 6.9.1 Recycled toner from the drum cleaning unit mixes with new toner. The toner density sensor, image density sensor, and image pixel count for the page control the toner supply.
Page 177: Development Mechanism
Development Mechanism Service manual, section 6.9.2 This is very similar to other machines that use dual-component developer.
Page 178 Drive To the toner separation unit To the toner supply unit Knob: Use when adding new developer To the development unit Driven by the development motor Service manual, section 6.9.6 A separate motor, dedicated to the task, drives the development roller. This reduces the load on the drum motor to stabilize drum motor rotation.
Page 179 Crossmixing Service manual, section 6.9.3 Demonstrate the following steps of the mixing process on the slide. A mixture of new toner from the toner bottle and recycled toner enters the development unit from the toner hopper. The agitators move the toner to the development roller. Toner split off by the doctor blade goes to the backspill plate.
Page 180: Development Bias
Development Bias Development bias: -550 V From the development power pack Service manual, section 6.9.4 Describe how bias is applied. Point out the following: The development bias is –550V. White areas of the latent image on the drum remain at a high –ve voltage (about -950 V).
Page 181: Toner Supply Mechanism
Toner Supply Mechanism Driven by the development motor and toner supply clutch Service manual, section 6.9.5 Describe this mechanism. The development motor drives the toner supply roller. The toner supply clutch is included in the development motor assembly. The toner supply clutch turns on the agitator and toner supply roller, which lets toner in from the bottle into the development unit.
Page 182 Toner Bottle Mechanism Driven by the toner supply motor Service manual, section 6.9.9 Describe this mechanism. Describe how the bottle drive mechanism moves toner into the development unit. Service manual, section 6.9.8 Describe how the shutter prevents scattering.
Page 183: Toner End Sensor
Toner End Sensor Pressure sensor Checked every copy Service manual, section 6.9.7 The toner end sensor detects when the amount of toner in the hopper is low. More about toner end detection will be explained shortly.
Page 184 Ventilation VENTILATION Cooling prevents toner particles from sticking together, and from sticking to the drum surface. Service manual, section 6.9.6 Development unit: Two fans above the bypass tray. They switch on when the drum motor switches on, and stay on for 110 seconds after the drum motor switches off. Service manual, section 6.9.9 Toner supply unit: One fan below the operation panel.
Page 185: Toner Supply
Toner Supply Factors Toner density (TD) sensor Image density (ID) sensor Image pixel count (number of black pixels on the page) Two toner supply modes Sensor control mode • Uses all the above factors Image pixel count mode • Does not use the TD/ID sensors Service manual, section 6.9.10 Overview To control toner supply, the machine monitors the following:...
Page 186 TD Sensor Initial Setting Initialization: Done every time new developer is installed. TD sensor input is calibrated to give 3.0 V output. This is the TD sensor reference voltage V Update: Immediately after the machine is turned on, or after recovery from auto off mode, if all these conditions occur: If fusing temperature is less than 100 C If SP 3901 - Auto Process Control is enabled...
Page 187: Sensor Control Mode
Sensor Control Mode Current TD sensor output is compared with the reference voltage. The difference affects how much toner will be added. The amount of black on the page is measured (image pixel count). The toner supply clutch turns on. Service manual, section 6.9.10 This process is done for every copy.
Page 188: Image Pixel Count Mode
Image Pixel Count Mode The TD and ID sensors are ignored. The amount of black on the page is measured. All other toner supply factors are kept unchanged The toner supply motor turns on. Service manual, section 6.9.10 In image pixel count mode, GAIN is fixed at 0.7. All other parameters remain at the values that used when the machine left sensor control mode, except for the image pixel count, which varies every copy.
Page 189 How Often is the ID Sensor Pattern Read? Every 10 copies (SP 2210) Does not stop during a job; a pattern is taken at end of the job if 10 copies were made after the last test Every 100 copies in the middle of a large job (SP 2507) Every 15 minutes in the middle of a large job (SP 2506) The drum cleaning blade is also cleaned.
Page 190 What happens if the TD and/or ID Sensors are Defective? SC codes are logged The machine continues to operate, but defective components are disabled Service manual, section 6.9.10 The manual explains what happens when either or both of these sensors are defective.
Page 191: Toner Near End & End Detection
Toner Near End & End Detection After the toner supply clutch has turned on, the machine checks the toner end sensor. The clutch turns on every copy for at least 16 ms as part of the toner supply process. If the sensor detects low toner for two consecutive copies: The toner supply motor turns the toner bottle.
Page 192: Toner End Recovery
Toner End Recovery If the front cover is opened and closed during toner near-end/end: The toner supply motor turns on for 1.1 s Then the toner supply clutch turns on for 1 s Then, if the toner end sensor detects toner: The machine compares the current TD sensor output (V ) with the reference voltage (V...
Page 193 SP Modes Development 2201: Development bias for copying SP MODES Development 2201: This was covered in Process Control...
Page 194 SP Modes Toner Supply 2207: Forced toner supply 2208: Toner supply mode 2209: Toner supply rate 2210, 2506, 2507, 2966: ID sensor pattern intervals 2223: TD sensor output 2801: TD sensor initial setting 2906 002: Displays the TD sensor initial setting 2967: Disable the ID sensor 2972: Toner bottle cooling fan control mode 3001 002: ID sensor initial setting...
Page 195: Replacement And Adjustment
Replacement and Adjustment Do the procedures in section 3.7 of the service manual. Obey all notes and cautions in the manual. After installing new developer, open the front door before you turn the power on. Then initialize the TD sensor (SP2801) after the machine has warmed up. REPLACEMENT Service manual, section 3.7 Have the trainees remove and replace the parts in this section.
Page 196: Copier Engine
B246 SERIES TRAINING COPIER ENGINE PAPER FEED Paper feed mechanisms built into the machine will be described in this section. The optional LCT will be covered in a separate section.
Page 197 Overview Four trays Tray 1 - Tandem feed tray (1550 x 2) Tray 2 - Universal tray (550 sheets) Tray 3 - Universal tray (550 sheets) Bypass tray - 100 sheets FRR feed system No size sensor in tray 1 Service manual, section 6.11.1 The diagram shows the four built-in feed stations.
Page 198 Drive Upper Relay Roller Motors Lower Relay Trays 1 to 3 - Roller Three paper feed motors, one for each tray By-pass tray, and upper relay roller - By-pass feed motor (not shown) Lower relay roller - Lower relay motor Service manual, section 6.11.2 The slide shows the motors involved in paper feed from the trays.
Page 199 Tray Lift (Trays 2 and 3) - 1 The tray lift motor lifts the tray. Service manual, section 6.11.3 Describe how the lift motor raises the tray. The machine detects that the tray is in place as follows: 1st tray – Electrical connection between tray and main body 2nd and 3rd trays –...
Page 200 Tray Lift (Trays 2 and 3) - 2 The lift sensor detects when the tray is at the correct position. Then the pick-up solenoid releases the pick-up roller, which falls onto the top of the stack. Service manual, section 6.11.3 The lift sensor detects when the paper stack is at the correct height.
Page 201 Tray Lift (Trays 2 and 3) - 3 The bottom plate drops under its own weight when the tray is pulled out of the copier. Service manual, section 6.11.3 Describe what happens when pulling out the tray. In the 2nd and 3rd trays, the bottom plate lowers under its own weight when the tray is pulled out.
Page 202: Pick-Up And Feed
Pick-up and Feed Before the first page, and between pages Grip Roller First, the feed motor rotates in reverse. The grip roller turns but the feed roller does not. The separation roller solenoid is off initially, so the roller is in the down position, and turns freely.
Page 203 Pick-up and Feed Pick-up and Feed Separation roller stays away from feed roller, until Pick-up Solenoid Start key pressed. Separation roller solenoid Lifts the separation roller Pick-up solenoid Drops the pick- up roller Separation Roller Solenoid Service manual, section 6.11.3, Paper Feed and Separation Describe this mechanism.
Page 204 Pick-up and Feed Separation Roller Release Separation roller normally away from feed roller Service manual, section 6.11.3, Separation Roller Release The separation roller is normally away from the feed roller. List the advantages of this: Reduced wear on rollers – no contact between rollers when another tray is in Less chance of damage to paper stuck between rollers Easier jam removal...
Page 205 Pick-up and Feed Separation Roller Release If the feed roller starts to reverse, an arm comes down, which moves the feed roller forward slightly, to pull it away from the separation roller Service manual, section 6.11.3, Separation Roller Release This new mechanism ensures that the feed and separation rollers do not stick together at the start of a job just after the machine leaves standby mode.
Page 206: Paper End Detection
Paper End Detection Service manual, section 6.11.5 There is no near near-end sensor. Near-end is detected by counting the number of tray lift motor pulses that have been made while lifting the bottom plate. When paper runs out, a feeler drops through the cutout in the bottom plate.
Page 207 Paper Size Detection - Trays 2 & 3 Tray 1 does not have a size sensor. Input the paper size with SP5959 001. Trays 2 and 3: For the * setting, select the paper size with User Tools - System Settings - Tray Paper Settings - Tray Paper Size Only works if SP 5112 is enabled Service manual, section 6.11.6 The service manual shows how the machine interprets the sensor outputs.
Page 208: Anti-Condensation Heaters
Anti-condensation Heaters Service manual, section 6.11.7 Note the locations of these two heaters. They turn on automatically, at the times mentioned in the manual. In this machine, the heaters are not optional.
Page 209: Tandem Feed Tray
Tandem Feed Tray Overview Two paper stacks in one tray Paper feeds from the right tray When the paper in the right tray runs out, the stack in the left tray is moved across to the right tray After that, paper feed resumes Paper can be added to the left tray without...
Page 210 Tandem Feed Tray Tray Lock and Release If there is paper in the left tray: The lock holds the two trays together If there is no paper in the left tray: Right tray lock solenoid releases the lock The user can add paper to the left tray, even while paper is feeding from the right tray Service manual, section 6.11.8, Connecting the Left and Right Sides of the Tray The main points are on the slide.
Page 211: Paper Lift
Tandem Feed Tray Tray connector: Informs when tray Paper Lift has been inserted 1st tray lift motor: Lifts the tray If paper is present in the right tray (detected by right tray paper end sensor) Lift Motor Tray lift stops when: Paper end sensor (at top of tray) is activated...
Page 212 Tandem Feed Tray Remaining Paper Paper height and near-end sensors: Detect amount of paper remaining Near End Sensor Paper Height Sensors (x3) Service manual, section 6.11.8, Paper Lift/Remaining Paper Detection These four sensors detect the amount of remaining paper. The mechanism is explained in the manual.
Page 213: Paper End
Tandem Feed Tray Paper End Service manual, section 6.11.8, Paper Lift/Remaining Paper Detection (end of the section) When paper runs out, a feeler drops through the cutout in the bottom plate. This is the same as for trays 2 and 3. Service manual, section 6.11.8, Paper Lift/Remaining Paper Detection, (previous page) The service manual is incorrect.
Page 214 Tandem Feed Tray Paper End Tray down sensor: Detects when the tray has been lowered all the way Tray Down Sensor Service manual, section 6.11.8, Paper Lift/Remaining Paper Detection (end of the section) When paper runs out, the tray must be lowered, so that the stack in the left tray can be moved across to the right tray.
Page 215 Tandem Feed Tray Side Fence Drive Side fence solenoids Open and close the fences Side fence open/closed sensors Detect the open and closed positions Service manual, section 6.11.8, Fence Drive The side fences open only when the stack of paper in the left tray is moving across to the right tray.
Page 216 Tandem Feed Tray Rear Fence Drive Rear fence drive motor: Pushes the paper stack into the right tray Rear fence home position/return sensors: Detect the rear fence home and return positions Service manual, section 6.11.8, Rear Fence Drive If the right tray is empty but the left tray is full, the paper in the left tray is moved across to the right tray.
Page 217 Tray Positioning Service manual, section 6.11.9 Describe how the tray is locked in place. This is the same for all three trays.
Page 218: By-Pass Feed Table
By-pass Feed Table Feed Mechanism / Paper End Detection FRR mechanism By-pass feed motor: Drives the rollers Pick-up solenoid: Drops the pick-up roller and moves the stopper out of the feed path By-pass feed clutch: Starts the feed roller Paper end sensor: Detects paper end Service manual, section 6.11.10 Describe this briefly.
Page 219: Paper Size Detection
By-pass Feed Table Paper Size Detection By-pass paper width sensor: Electrical resistance changes when the guides move to a different position Paper length: Detected using the registration sensor and a pulse counter When 8.5"-width paper is fed from the by-pass tray, the paper size is first detected as 8.5"...
Page 220: Paper Registration
Paper Registration Overview Service manual, section 6.11.11, Overview The diagram shows the path of paper from all trays, including the duplex unit and optional LCT. The registration roller is driven by a motor dedicated to this task. The registration sensor also detects jams.
Page 221 Paper Registration Registration Drive Mechanism The registration motor drives the lower registration roller. Service manual, section 6.11.11, Paper Registration Drive The registration roller has a dedicated motor, instead of a clutch. The shock of a clutch turning on can agitate the toner on the latent image. This causes jitter near the leading edge.
Page 222 Paper Registration Guide Plate Release Mechanism The guide plate opens if the registration sensor does not detect paper at the correct time. The guide plate blocks the paper path and diverts the next sheet of paper into the duplex tray, to prevent a pile-up between the registration roller and the vertical transport rollers.
Page 223 SP Modes 1003: Paper feed timing 1007: By-pass feed paper size sensor output 1904: By-pass tray paper size sensor calibration 1905: By-pass clutch operation for thick paper mode 1003: Paper feed timing. Adjusts the paper buckle at the registration roller by adjusting the relay clutch timing.
Page 224: Replacement And Adjustment
Replacement and Adjustment - 1 Tandem tray Tandem tray removal Right tray paper sensor removal Bottom plate lift wire removal Paper size change Trays 1 to 3 Pick-up, feed, and separation roller removal Separation roller pressure adjustment • Adjust if there are jams when feeding in from the paper tray. Feed unit Service manual, section 3.11 Have the trainees do the procedures on the slide.
Page 225 Replacement By-pass Pick-up, feed, and separation roller removal Paper size detection board removal Separation roller pressure adjustment Registration and by-pass units Pressure adjustment Note the use of this adjustment to solve feed problems at the feed-in area. By-pass paper size sensor board After installing a new board, calibrate the sensor using SP 1904 001 and 1904 002.
Page 226: Side-To-Side Registration
Tandem Feed Tray Side-to-side Registration Move the positioning plate to adjust the side-to-side registration Service manual, section 6.11.8, Tray Side-to-side Positioning Note this adjustment.
Page 227: Transfer And Separation
B246 SERIES TRAINING COPIER ENGINE TRANSFER AND SEPARATION Image transfer and paper separation mechanisms will be described in this section.
Page 228: Pre-Transfer Lamp (Ptl)
Pre-Transfer Lamp (PTL) Gives better separation of paper from the drum. You can adjust the lamp turn-on timing with SP 2602. The PTL does not operate when you use OHP, tab sheets, or thick paper. After the latent image is developed but before the image is transferred to the copy paper, the photoconductor surface is illuminated by a lamp.
Page 229: Transfer Belt Unit
Transfer Belt Unit Transfer Belt Transfer Roller Drum Cleaning Blade Transfer Belt Cleaning Lift Lever Roller Transfer Belt (operated by a Waste Toner (electrically Cleaning Unit solenoid) Collection Coil charged) Service manual, section 6.10.1 This model uses a transfer belt. The belt has a high electrical resistance, so that it can hold a high positive voltage to attract toner from the drum to the paper.
Page 230 Belt Contact Mechanism 1 Transfer belt lift solenoid: Lifts and lowers the belt Belt lifts 500 ms after the drum motor starts at the beginning of the job Belt lowers at the end of the copy job Service manual, section 6.10.2 Describe the mechanism.
Page 231 Belt Contact Mechanism 2...
Page 232 Belt Charge 1 Transfer Cleaning Roller Roller Drive Roller (grounded) Transfer Power Pack Drive Roller (grounded) The transfer power pack applies a positive charge Transfer roller: About 7,000 volts Cleaning roller: About 1,000 volts Service manual, section 6.10.3 The positive charge applied to the transfer belt pulls the toner off the drum and onto the paper.
Page 233 Belt Charge 2 Varistor The power pack monitors I and I The power pack varies its output (I ) to keep current to ground through the drum (I ) constant Service manual, section 6.10.5 The power pack adjusts the current to the transfer roller to maintain a small, but constant, current flow (I ) to ground through the belt, paper, and drum.
Page 234: Belt Drive
Belt Drive The drum motor drives the transfer belt. Service manual, section 6.10.6 Describe the mechanism. Point out the following: The drum drive motor drives the transfer belt. There is no transport fan, because the belt attracts the paper electrostatically. A separation corona is not necessary;...
Page 235 Belt Cleaning Mechanism Cleaning Blade Cleaning Roller Cleaning roller always in contact with the belt Positive charge applied to the roller to attract negatively charged toner Cleaning roller cleaning blade: Counter blade Service manual, section 6.10.7 Describe this mechanism using the slide and the service manual. The Mojito had a cam for side-to-side movement, but this model has no cam.
Page 236 Toner Collection Toner path: Toner collection coil - Waste toner collection bottle Service manual, section 6.10.7 Toner removed from the belt by the previous mechanism is transferred to the waste toner collection bottle. In this model, the agitator plate does not move from side to side (no cam). The ‘Processes around the Drum’...
Page 237: Anti-Condensation Heater
Anti-condensation Heater Below the transfer belt drive roller. Service manual, section 6.10.8 This is not an option in this model. It is a standard part of the machine. It switches on automatically at the times stated in the manual.
Page 238 SP Modes 2301: Transfer current for various paper types and parts of the image 2931 to 2936: Transfer current on/off timing 2931: LCT 2932: Tray 1 2933: Tray 2 2934: Tray 3 2936: By-pass tray 2602: Controls the PTL (enable/disable, timing) SP MODES Many of these SPs are DFU, but this is how they work, anyway.
Page 239 Transfer Current Timing Adjustments Current On Before Leading Edge Leading Edge Current Paper Leading Edge La1f Image Transfer Current Lc1r Paper Trailing Edge Trailing Edge Current Current Off After Trailing Edge This slide attempts to explain the meanings of SP 2931 to 2936. As shown on the previous slide, the settings can be adjusted for each paper tray.
Page 240 Replacement Do the procedures in section 3.8 of the service manual. The procedure for the PTL is in section 3.6.6. REPLACEMENT Service manual, section 3.8 Have the trainees remove and replace the parts in this section. Remind them to follow all notes and cautions in the manual. Service manual, section 3.1.3 First, make sure that the class is aware of the service notes for the transfer unit.
Page 241 B246 SERIES TRAINING COPIER ENGINE FUSING Fusing will be described in this section.
Page 242 Overview Exit Unit Fusing Unit Exit Unit Entrance Sensor Paper Exit Sensor Exit Junction Gate Three fusing lamps (not identical) Silicone oil supply to hot roller Fusing Exit Sensor Pressure release mechanism: Removes pressure between the hot and pressure rollers when the machine is in the ready condition Service manual, section 6.12.1 The diagram shows the fusing unit (on the right) and the exit unit (on the left), which directs paper either down to the inverter/duplex unit, or out to the copy tray...
Page 243 Temperature Control Components Thermostats Thermistors Three fusing lamps Not identical. Make sure to install them in the correct locations. Two thermistors, three thermostats The thermostats prevent overheating. Service manual, section 6.12.2 The two thermistors are used to control the fusing temperature. The three thermostats are used to detect when the fusing unit temperature gets too high.
Page 244: Pressure Roller
Pressure Roller Motor This mechanism makes sure that the hot roller and pressure roller touch only when the machine makes copies. This prevents damage to the pressure roller. This is done with a cam and pressure lever. The fusing pressure release motor controls the mechanism.
Page 245: Hot Roller Cleaning
Hot Roller Cleaning A web coated in silicone oil is pressed against the hot roller. Service manual, section 6.12.4 The main point is on the slide. The service manual points out the rollers in this web cleaning unit, which is quite a simple one.
Page 246 Web Unit Drive Web motor: Drives the web cleaning unit Near-end: SP 1902 004 determines when to issue the near-end alert (default: after 80% used) Web end sensor: Detects when the web has all been used up Lifetime: About 300K copies Service manual, section 6.12.4 The main points are on the slide.
Page 247: Fusing Entrance Guide
Fusing Entrance Guide Normal position (normal paper, thick paper)_ - upper position Service manual, section 6.12.5 The manual explains how to use this adjustment. The manual contains some guidelines, but it is not easy to recommend any one setting. Only change the setting when wrinkling occurs in the fusing unit. In such cases, use the setting that works best under the situation.
Page 248 Fusing Drive Mechanism The fusing/duplex motor drives the hot roller. The pressure roller is driven by friction with the hot roller. Service manual, section 6.12.6 Outline this mechanism.
Page 249 Automatic Copy Speed Reduction Also called ‘CPM Down Mode’ Makes sure that fusing is completed correctly in all conditions Two processes Copy speed automatically decreases if the user selects thick paper or OHP at the bypass tray. Copy speed automatically decreases if the centre thermistor detects that the temperature is below a set value.
Page 250: Temperature/Humidity Sensor
Temperature/Humidity Sensor This sensor [A] is below the waste toner collection bottle [B]. The copy speed automatically decreases if the hot roller temperature goes below a set value. This set value is controlled by the room temperature. Service manual, section 6.12.7...
Page 251: Fusing Temperature Control
Fusing Temperature Control Fusing idling Done at the start of jobs on OHP or thick paper (controlled by SP 1907) The fusing unit gets very quickly to the ready and printing temperatures. Because of this, fusing idling is normally not necessary, and is not done.
Page 252 Paper Exit Mechanism - Drive The fusing/exit motor drives the rollers. Service manual, section 6.12.9 Describe this briefly.
Page 253 Paper Exit Mechanism - Curl Correction The curl correction rollers remove curl produced during fusing. Service manual, section 6.12.9 Describe this briefly.
Page 254 Paper Exit Mechanism - Junction Gate To Paper Exit To Inverter/Duplex Paper goes either: Straight through to the output tray or finisher Down to the inverter and duplex unit Service manual, section 6.12.10 Show how the exit gate solenoid directs paper through to the output tray or down to the finisher.
Page 255 Fusing Unit Jams Normally, the user will remove fusing unit jams. But, if SP 1159 is changed to ‘on’, the machine stops if a jam occurs in the fusing unit for three consecutive paper feeds. Then, SC559 appears. The technician must remove the jam.
Page 256 SP Modes 1103: Fusing idling 70 seconds at power on No idling when recovering from low power mode 1102, 1105: Fusing temperature adjustments 1106: Displays the fusing temperature 1901: Copy speed change for thick paper 1902, 1903: Web unit settings 1906: Displays the readings from the temperature and humidity sensor (below the toner collection bottle) 1907: Idling before fusing, for OHP and thick paper (default:...
Page 257 Replacement and Adjustment Do the procedures in section 3.9 of the service manual. Obey all notes and cautions in the manual. Web unit After installing a new web, reset SP1902 001 to 0. Service manual, section 3.9 Have the trainees do the procedures in this section. Remind them to follow all notes and cautions in the manual.
Page 258: Fusing Lamp Replacement
Fusing Lamp Replacement The three fusing lamps are all different. To make sure that you connect the lamps to the correct places, the connectors on the lamps have colours (white, blue, green). The connectors on the machine also have the same colours. Because of this, it is not possible to make an error.
Page 259 B246 SERIES TRAINING COPIER ENGINE DUPLEX The duplex mechanisms will be described. The duplex tray is a standard component of this model.
Page 260 Overview From the Fusing Unit Back into the Machine Face-up output: The page goes out of the fusing unit to the tray directly. Face-down output: The page goes to the inverter before being fed out to the tray. Duplexing: The page goes through the inverter to the duplex tray. Service manual, section 6.13.1 This unit is a standard part of the machine, not an optional unit.
Page 261: Duplex Drive Mechanism
Duplex Drive Mechanism Fusing/Duplex Motor Fusing/duplex motor: Drives the inverter Duplex inverter and transport motors: Inverter Motor Drive the duplex transport rollers Transport Motor Service manual, section 6.13.2 Describe this briefly.
Page 262 Inverter - Feed-in Inverter Entrance Roller Inverter entrance roller: Feeds paper into the inverter Service manual, section 6.13.3 If the paper exit mechanism directed the paper down towards the inverter, the inverter feed roller passes it to the jogger unit. The weight of the paper pushes down the junction gate.
Page 263 Inverter - Jogging Jogger motor: Moves the jogger fences Jogger home position sensor: Detects the jogger fence home position Service manual, section 6.13.3 Jogging ensures that the paper is straight.
Page 264 Inverter - Feed-out 1 Reverse Trigger Roller Reverse roller solenoid: Lowers the reverse trigger roller Service manual, section 6.13.3 The next two slides show how paper is fed out of the inverter unit.
Page 265 Inverter - Feed-out 2 Inverter Exit Roller Reverse Roller Reverse roller: Feeds the paper back Inverter exit roller: Feeds the paper upwards Service manual, section 6.13.3 In the red circle, it is not easy to see, but the inverter sensor is just past the inverter roller, so this sensor detects when the paper has just been caught by this roller.
Page 266: Duplex Tray Feed Mechanism
Duplex Tray Feed Mechanism Transport Rollers Duplex inverter solenoid: Moves the junction gate, directs the paper down to the duplex tray Duplex transport rollers: Feed the paper into, through, and out of the duplex tray Service manual, section 6.13.4 In duplex mode, the junction gate switches and the inverter feeds the paper down into the duplex unit instead of back up to the machine.
Page 267 SP Modes 1008: Distance between the jogger fences SP Modes 1008: Distance between the jogger fences. The SP table explains when to adjust this setting (skewing, or paper creasing)
Page 268 Replacement and Adjustment Do the procedures in section 3.10 of the service manual. Obey all notes and cautions in the manual. Service manual, section 3.10 Have the trainees do the procedures in this section. Remind them to follow all notes and cautions in the manual. The manual explains the purpose of the adjustments.

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