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Ricoh K-C3 Service Manual

Machine code: (b245/b276/b277/b268/b269)
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Model K-C3
Machine Code:
(B245/B276/B277/B268/B269)

SERVICE MANUAL

©Ricoh Company, Ltd.
January 18th, 2006
Subject to change

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Table of Contents
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Summary of Contents for Ricoh K-C3

  • Page 1: Service Manual

    Model K-C3 Machine Code: (B245/B276/B277/B268/B269) SERVICE MANUAL ©Ricoh Company, Ltd. January 18th, 2006 Subject to change...

  • Page 2: Table Of Contents

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Table of Contents Read This First ........................1 Safety Notices and Symbols & Abbreviations..............1 Important Safety Notices..................1 Laser Safety ........................2 Symbols and Abbreviations ....................2 Installation..........................3 Installation Requirements....................3 Environment ........................3 Machine Level ....................... 4 Minimum Space Requirements..................
  • Page 3 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Tray Heaters ........................33 Upper Tray Heater ....................... 33 Lower Tray Heater (Two-tray Model Only) ..............35 Tray Heaters For The Optional Paper Feed Units ............36 Key Counter Installation ....................40 GDI Expansion ........................ 43 Accessory Check......................
  • Page 4 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Exposure Glass/DF Exposure Glass ................61 Lens Block ........................62 Lamp Stabilizer Board And Exposure Lamp ..............63 Original Width/Length Sensor..................63 Scanner Motor ......................65 Scanner Home Position Sensor................... 66 Adjusting Scanner Positions ..................67 Laser Unit........................
  • Page 5 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Lower Paper Feed Clutch (Two-tray Models Only) ............91 Vertical Transport Sensor (Two-tray Models Only) ............92 Paper Size Switch ....................... 92 Image Transfer ........................ 93 Image Transfer Roller ....................93 Image Density Sensor ....................94 Fusing ..........................
  • Page 6 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Troubleshooting ........................ 116 Service Call Conditions ....................116 Summary ........................116 SC Code Descriptions ....................117 Electrical Component Defects ..................133 Sensors ........................133 Switches ........................135 Blown Fuse Conditions ....................137 LED Display ........................138 BICU ..........................
  • Page 7 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 ADF APS Sensor Output Display (SP 6901).............. 191 Detailed Section Descriptions ................... 193 Overview ........................193 Component Layout ....................193 Paper Path......................... 194 Drive Layout ......................195 Board Structure ......................196 Block Diagram ......................196 BICU (Base Engine and Image Control Unit)............. 197 SBU (Sensor Board Unit)...................
  • Page 8 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Development Bias ..................... 229 Toner Supply......................230 Toner Supply Mechanism ..................231 Toner Density Control ....................231 Toner Supply in Abnormal Sensor Conditions............235 Toner Near End/End Detection and Recovery ............236 Drum Cleaning and Toner Recycling ................238 Drum Cleaning......................
  • Page 9 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Overview........................263 AOF ........................... 264 Timers........................264 Recovery ........................264 Energy Saver Modes of GDI Machines ................. 265 Overview........................265 AOF ........................... 266 Timers........................266 Recovery ........................266 Specifications........................267 General Specifications ....................267 Supported Paper Sizes ....................271 Original Size Detection ....................

  • Page 10: Read This First

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Read This First Safety Notices and Symbols & Abbreviations Important Safety Notices Prevention of Physical Injury Before disassembling or assembling parts of the copier and peripherals, make sure that the power cord is unplugged. The wall outlet should be near the copier and easily accessible. Note that some components of the copier and the paper tray unit are supplied with electrical voltage even if the main power switch is turned off.

  • Page 11: Laser Safety

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Laser Safety The Center for Devices and Radiological Health (CDRH) prohibits the repair of laser-based optical units in the field. The optical housing unit can only be repaired in a factory or at a location with the requisite equipment. The laser subsystem is replaceable in the field by a qualified Customer Engineer.

  • Page 12: Installation

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Installation Installation Requirements Before installing options, please do the following: If there is a printer option in the machine, print out all data in the printer buffer. Turn off the main switch and disconnect the power cord, the telephone line, and the network cable.

  • Page 13: Machine Level

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Do not install the machine at any location over 2,000 m (6,500 ft.) above sea level. Place the machine on a strong and level base. (Inclination on any side should be no more than 5 mm.) Do not place the machine where it is subjected to strong vibrations.

  • Page 14: Power Requirements

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Power Requirements Make sure that the wall outlet is near the machine and easily accessible. After. completing installation, make sure the plug fits firmly into the outlet. Avoid multi-wiring. Be sure to ground the machine Input voltage: North and South America, Taiwan: 110 –...

  • Page 15: Copier Installation

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Copier Installation Power Sockets for Peripherals Make sure to plug the cables into the correct sockets. [A]: Socket for ADF/ARDF (Rated voltage output max. DC24 V) [B]: Socket for paper tray unit (Rated voltage output max. DC24 V) Accessory Check Check that you have the accessories in this list.

  • Page 16: Installation Procedure

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 GDI Machines Description Q’ty NECR-English /Multi-language (-19, -29) Laser Decal (-19, -29) Model Name Plate (-19, -29) Operating Instructions (-19, -29) General Setting Guide (-19, -29) Copy Reference (-19, -29) Printer/Scanner Reference (-19, -29) Network Reference (-19, -29) Quick Guide Copy Edition (-19, -29) 10 Quick Guide Printer/Scanner Edition (-19, -29) 11 Manual for this machine (-19, -29)
  • Page 17 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Open the front door and remove the toner bottle holder [A] Open the right door [B], and remove the PCU (photoconductor unit) [C]. Separate the PCU into the upper part and the lower part ( x 5). Put a sheet of paper on a level surface and place the upper part on it.
  • Page 18 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 This prevents foreign material from getting on the sleeve rollers Distribute a pack of developer [D] to all openings equally. Do not spill the developer on the gears [E]. If you have spilled it, remove the developer by using a magnet or magnetized screwdriver.
  • Page 19 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 11. Pull out the paper tray [I] and turn the paper size dial to the appropriate size. Adjust the positions of the end and side guides. To move the side guides, release the green lock on the rear side guide. 12.

  • Page 20: B245/B276/B277/B268/B269 Service Manual 18-Jan

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Platen Cover Installation Accessory Check Check that you have the accessories indicated below. Description Q’ty Stepped Screw Installation Procedure Unplug the machine power cord before starting the following procedure. Install the platen cover ( x 2).

  • Page 21: Ardf Installation

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 ARDF Installation Accessory Check Check the quantity and condition of the accessories against the following list. Description Q’ty Scale Guide DF Exposure Glass Stud Screw Knob Screw Original Size Decal Screwdriver Tool Attention Decal—Top Cover Stamp Cartridge Installation Procedure...

  • Page 22: Installation Procedure

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Installation Procedure Unplug the copier power cord before starting the following procedure. Remove the strips of tape. Remove the left scale [A] ( x 2). Place the DF exposure glass [B] on the glass holder. Make sure that the white mark [C] is on the bottom at the front end.
  • Page 23 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Secure the ARDF unit with the knob screws [G]. Connect the cable [H] to the copier. Attach the appropriate original size decal [I] as shown. 10. Attach an attention decal to the top cover. The attention decals in the package are written in different languages.
  • Page 24 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 11. Open the ARDF [J]. 12. Install the stamp cartridge [K] to the ARDF. 13. Make a full size copy, and check that the side-to-side and leading edge registrations are correct. If they are not, adjust the side-to-side and leading edge registrations.

  • Page 25: Adf Installation

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 ADF Installation Accessory Check Check the quantity and condition of the accessories against the following list. Description Q’ty Scale Guide DF Exposure Glass Stud Screw Fixing Screw Original Size Decal Screwdriver Tool Attention Decal—Top Cover Stamp Cartridge Installation Procedure...

  • Page 26: Installation Procedure

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Installation Procedure Unplug the machine power cord before starting the following procedure. Remove the strips of tape. Remove the left scale [A] ( x 2). Place the DF exposure glass [B] on the glass holder. Make sure that the white mark [C] is on the bottom at the front end.
  • Page 27 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Secure the ADF unit with the fixing screws [G]. Connect the cable [H] to the copier. Attach the appropriate scale decal [I] as shown. 10. Attach an attention decal to the top cover. The attention decals in the package are written in different languages.
  • Page 28 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 11. Open the ADF [J]. 12. Install the stamp cartridge [K] to the ADF 13. Turn the main power switch on. Then check if the document feeder works properly. 14. Make a full size copy, and check that the side-to-side and leading edge registrations are correct.

  • Page 29: Two-Tray Paper Tray Unit Installation

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Two-tray Paper Tray Unit Installation Accessory Check Check the quantity and condition of the accessories against the following list. Description Q’ty Screw – M4x10 Unit Holder 2 x 2 pieces Adjuster Unit Holder Installation Procedure If the optional printer unit is installed: Print out all data in the printer buffer.
  • Page 30 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 and all the pieces of cardboard. After removing the tape that secures the peripheral components and cardboard to the paper tray, make sure that there is no tape and/or tape reside remaining on the tray. Attach the adjuster [A] to the base plate as shown. This step is not necessary if a cabinet is installed.
  • Page 31 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Set the copier on the paper tray unit. Before placing the copier on the paper tray unit, make sure that the harness [C] is safe. The paper tray unit does not function properly if the harness is damaged. One-tray copier model (B268/B276): Remove the 1st tray cassette [D].
  • Page 32 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Install the two brackets [F] ( x 1 (each)) Connect the connecting harness [G] to the copier. There are cutouts for the plugs on both sides. The left side has one cutout, and the right side has two. 10.
  • Page 33 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 12. Rotate the adjuster (installed at step 2) to fix the machine in place. If a cabinet is installed, this step is unnecessary. 13. Load the paper in the paper trays and make full size copies from each tray. Check if the side-to-side and leading edge registrations are correct.

  • Page 34: One-Tray Paper Tray Unit Installation

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 One-tray Paper Tray Unit Installation Accessory Check Check the quantity and condition of the accessories against the following list. Description Q’ty Screw – M4 x 10 Stepped Screw – M4 x 10 Unit Holder Installation Procedure If the optional printer unit is installed: Print out all data in the printer buffer.
  • Page 35 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Remove the cover [A] (1 rivet). Before placing the copier on the paper tray unit, make sure that the harness [B] is safe. The paper tray unit does not function properly if the harness is damaged. Set the copier on the paper tray unit.
  • Page 36 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 One-tray copier model (B268/B276): Remove the 1st tray cassette [C]. Two-tray copier models (B269/B277): Remove the 2nd tray cassette [C]. Install the two screws [D]. Reinstall the tray cassette.
  • Page 37 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Install the two brackets [E]. (1 stepped screw each). Connect the connecting harness [F] to the copier. There are cutouts for the plugs on both sides. The left side has one cutout, and the right side has two. Reinstall the cover removed in step 2.

  • Page 38: One-Bin Tray Installation

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 One-Bin Tray Installation Accessory Check Check the quantity and condition of the accessories. Description Q’ty Installation procedure One-bin sorter Exit tray Tapping screw M3 x 6 Installation Procedure Unplug the machine power cord before starting the following procedure. Remove the inverter tray [A].
  • Page 39 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Open the front cover [D]. Remove the front right cover [E] ( x 1). Disconnect the connector [F]. Cut the front cover as shown, to make an opening [G] for the 1-bin tray. Install the 1-bin tray [H]. Make sure the connectors [I] are connected firmly.
  • Page 40 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 12. Reattach the front right cover [K]. 13. Close the front cover [L]. 14. Install the exit tray [M] as follows: Keep the front end higher than the rear end. Push the left hook into the opening in the copier. Push the right hook into the opening in the copier.

  • Page 41: Anti-Condensation Heater Installation

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Anti-condensation Heater Installation Unplug the machine power cord before starting the following procedure. Remove the exposure glass. Remove the left cover. Pass the connector [A] through the opening [B]. Install the anti-condensation heater [C], as shown. Join the connectors [A, D].

  • Page 42: Tray Heaters

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Tray Heaters Unplug the machine power cord before starting the following procedure. Upper Tray Heater Remove the 1st tray cassette [A]. Remove the rear cover. Pass the connector [B] through the opening [C] and install the tray heater [D] (...
  • Page 43 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Install the relay harness [E]. Fix the harness with the clamp [F]. Reinstall the 1st tray cassette and the rear cover.

  • Page 44: Lower Tray Heater (Two-Tray Model Only)

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Lower Tray Heater (Two-tray Model Only) Remove the 2nd tray cassette [A]. Remove the rear lower cover. B277/B269 only: Remove the DCB [B] with bracket ( x 4, x 3). Pass the connector [C] through the opening [D] and install the tray heater [E] ( Join the connectors [F].

  • Page 45: Tray Heaters For The Optional Paper Feed Units

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Tray Heaters For The Optional Paper Feed Units Remove the rear cover [A].for the paper tray unit One-tray paper feed unit: Two-tray paper feed unit: Two-tray unit only: Remove the cable guide [B]. Install the clamps [C].
  • Page 46 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 One-tray paper feed unit: Two-tray paper feed unit: Pass the connector [D] through the opening [E]. Install the tray heater [F] ( x 1)
  • Page 47 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 One-tray paper feed unit: Two-tray paper feed unit: Clamp the cables [G], as shown. Join the connectors [H]. Two-tray unit only: Reinstall the cable guide. One-tray copier model (B268/B276): Remove the 1st tray cassette. Two-tray copier models (B269/B277): Remove the 2nd tray cassette.
  • Page 48 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 10. Remove the two screws [I] and install the two hexagonal socket screws [J]. 11. Reinstall the 1st tray/2nd tray(s) and rear cover.

  • Page 49: Key Counter Installation

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Key Counter Installation Unplug the machine power cord before starting the following procedure. Remove the left cover. Remove the rear cover. Cut the cap [A] with nippers. Punch out the small hole [B] using a screwdriver. Hold the key counter plate nuts [C] on the inside of the key counter bracket [D] and insert the key counter holder [E].
  • Page 50 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Connect the connector [G] to CN126 on the BICU. Hold the harness with the clamps [H][I][J]. The relay harness is not included in the key counter bracket accessories 10. Join the relay harness [K] with the connector [L]. 11.
  • Page 51 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 12. Pass the relay harness through the opening [M] and reinstall the left cover. 13. Install the stepped screw [N]. 14. Join the connectors [O]. 15. Pass the joined connectors through the opening of the key counter holder assembly [P], and put the connectors inside the assembly.

  • Page 52: Gdi Expansion

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 GDI Expansion Accessory Check Description Q’ty Cover-CPS NA Cover-CPS EU Ferrite Core (B866 only) Tapping Screw-M3X6 Sheet-EULA Seal-Caution Installation Procedure Installing Expansion Component Unplug the machine power cord before starting the following procedure. Remove the rear cover [A] ( x 6).
  • Page 53 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Connect the controller box [D] to the BICU. Make sure that the BICU [E] is not damaged and that the three openings [F][G][H] hold the controller box. Fasten the screws ( x 7). Attach the ferrite core [I] to the network cable [J]. The end of the ferrite core must be about 10 cm (4") from the end of the cable [K].

  • Page 54: Installing Panels And Keys

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Installing Panels and Keys Remove the dummy cover [A] from the operation panel Install the printer/scanner panel [B] on the operation panel.

  • Page 55: Preventive Maintenance

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Preventive Maintenance PM Tables After preventive maintenance work, reset the PM counter (SP 7804 1). PM intervals (60k, 80k, and 120K) indicate the number of prints. Key: AN: As necessary C: Clean R: Replace L: Lubricate I: Inspect Optics 120k NOTE...
  • Page 56 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Paper Feed 120k NOTE Paper feed roller (each tray) Clean with water or alcohol. Friction pad (each tray) Clean with water or alcohol. Bottom-plate pad (each tray) Clean with water or alcohol. Paper feed roller (bypass tray) Clean with water or alcohol.
  • Page 57 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Paper Tray Unit 120k NOTE Paper feed rollers Dry or damp cloth Bottom-plate pads Dry cloth Paper-feed guides Clean with water or alcohol. Friction pads Dry or damp cloth Relay clutch (B384 only) Feed clutches (B384 only) Relay roller (B384 only) Dry cloth...

  • Page 58: How To Reset The Pm Counter

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 How to Reset the PM Counter After preventive maintenance work, reset the PM counter (SP 7804 1) as follows. Activate the SP mode ( p.139). Select SP 7804 1 (Reset–PM Counter). Press the OK key [A]. The message "Execute" shows. Press the button [B] below the message "Execute."...
  • Page 59 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 The messages "Execute?" followed by "Cancel" and "Execute" show. To reset the PM counter, press the button [C] below the message "Execute." Wait until the message "Completed" shows. Quit the SP mode.

  • Page 60: Replacement And Adjustment

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Replacement and Adjustment General Cautions Do not turn off the main switch while any of the electrical components are active. Doing so may result in damage to units (such as the PCU) as they are pulled out or replaced. PCU (Photoconductor Unit) The PCU consists of the OPC drum, charge roller, development unit, and cleaning components.

  • Page 61: Laser Unit

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Laser Unit Do not loosen or adjust the screws securing the LD drive board on the LD unit. This will put the LD unit out of adjustment. Do not adjust the variable resistors on the LD unit. These are adjusted at the factory.

  • Page 62: Special Tools And Lubricants

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Special Tools and Lubricants Part Number Description Q’ty A0069104 Scanner Positioning Pins (4 pins/set) 1 set A2929500 Test Chart S5S (10 pcs/set) 1 set VSSM9000 FLUKE 87 Digital Multimeter N8036701 4MB Flash Memory Card A2579300 Grease Barrierta S552R 52039502 Grease G-501...

  • Page 63: Exterior Covers & Operation Panel

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Exterior Covers & Operation Panel Rear Cover Unplug the DF cable [A] (if installed). Rear cover [B] ( x 6) Rear Lower Cover (Two-tray Models Only) Rear cover (see above) or tray harness cover [A] (1 rivet). Rear lower cover [B] ( x 2)

  • Page 64: Copy Tray

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Copy Tray Copy tray [A] ( x 2) Upper Covers Platen Cover, ARDF, or ADF (if installed) Rear cover Left upper cover [A] ( x 2) Front upper left cover [B] ( x 3) Operation panel [C] ( x 4, x 1) Right upper cover [D] (...

  • Page 65: Left Cover

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Left Cover Left cover [A] ( x 3) Front Cover Pull out the (top) paper tray. Open the front door [A]. Front cover [B] ( x 4)

  • Page 66: Front Right Cover

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Front Right Cover Open the front door [A]. Front right cover [B] ( x 1) Right Rear Cover Right upper cover ( p.55) Open the duplex unit (B269/B277 only). Right rear cover [A] ( x 1)

  • Page 67: Right Door (Duplex Unit (B269/B277))

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Right Door (Duplex Unit (B269/B277)) Right rear cover (see above) Open the right door [A]. Open the clamps [B] and disconnect the two connectors [C] or three connectors (B269/B277). Right door By-pass Tray Right rear cover (above) Open the right door.

  • Page 68: Left Lower Cover (Two-Tray Models Only)

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 procedure) and disconnect the connector (5-pin connector with colored wires). Cable holder [A] (B269/B277 only) Front-side clip ring [B] Front-side pin [C] (You can push the pin from behind the right door.) Front-side tray holder arm [D] Remove the rear-side clip ring, pin, and tray holder arm in the same manner.

  • Page 69: Platen Cover Sensor

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Platen Cover Sensor Top rear cover Platen cover sensor [A] ( x 1)

  • Page 70: Scanner Unit

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Scanner Unit Exposure Glass/DF Exposure Glass - Exposure Glass - Front upper left cover ( p.55) Left scale [A] ( x 2) Rear scale [B] ( x 3) Exposure glass [C] Make sure that the mark is at the rear left corner, and that the left edge is aligned to the support on the frame when you reinstall the exposure glass.

  • Page 71: Lens Block

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Lens Block Do not touch the paint-locked screws on the lens block. The position of the lens assembly (black part) is adjusted before shipment. Do not grasp the PCB or the lens assembly when you handle the lens block. The lens assembly may slide out of position.

  • Page 72: Lamp Stabilizer Board And Exposure Lamp

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Lamp Stabilizer Board And Exposure Lamp Operation panel ( p.55) Exposure glass ( p.61) Slide the first scanner to a position where the front end of the lamp is visible. Place one hand under the lamp stabilizer board [A] and release the hook [B]. Lamp stabilizer board ( x 2) Press the plastic latch [C] and push the front end of the lamp toward the rear.
  • Page 73 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 - Sensor Positions - Sensor positions vary according to regions as shown below. - Sensor Positions for China Model (8K/16K) - This procedure is for China models only. You must rearrange the positions of the original width and length sensors for the copier to detect the following original sizes: 8K SEF (270 x 390 mm) 16K SEF (195 x 270 mm)

  • Page 74: Scanner Motor

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 A3/A4/B4/B5 (A3-SEF/B4-SEF 8K-SEF; B5-SEF/A4-SEF 16K-SEF; B5-LEF/A4-LEF 16K-LEF). Turn off the main switch. Exposure glass ( p.61). Original width/length sensors [A] [B] Rearrange the sensor positions [C] [D]. Turn on the main switch and check the operations. Scanner Motor Left upper cover, front upper left cover, operation panel, top rear cover ( p.55)

  • Page 75: Scanner Home Position Sensor

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Scanner Home Position Sensor Left upper cover, top rear cover ( p.55) Exposure glass, DF exposure glass (if installed) ( p.61) Disconnect the connector [A]. Scanner left lid [B] ( x 7) Sensor tape [C]. Scanner home position sensor [D]...

  • Page 76: Adjusting Scanner Positions

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Adjusting Scanner Positions Grasp the front and rear ends (not the middle) of the first scanner when you manually move it. The first scanner may be damaged if you press, push, or pull its middle part. - Overview - Adjust the scanner positions when the first scanner [C] and second scanner [B] are not parallel with the side frames [A], or, when you have replaced one or more of the scanner...
  • Page 77 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 The alignment marks [G] [I] on the frames The scanner positions are correct when these holes and marks are aligned. - Adjusting the First Scanner Contact Points - A(R)DF or platen cover Operation panel, top rear cover ( p.55).
  • Page 78 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 - Adjusting the Second Scanner Contact Points - A(R)DF or platen cover Operation panel, top rear cover ( p.55). Exposure glass ( p.61) Rear exhaust fan [A] ( x 2) Controller bracket [B] ( x 3) Disconnect the platen-cover-sensor connector [C].
  • Page 79 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 11. The adjustment holes in the first scanner 12. The adjustment holes in the second scanner 13. The alignment marks on the frames 14. Insert the positioning tools [G] [H] through the holes and marks. 15. Check that the scanner belts are properly set in the brackets. 16.

  • Page 80: Laser Unit

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Laser Unit The laser beam can seriously damage your eyes. Be absolutely sure that the main power switch is off and that the machine is unplugged before you access the laser unit. Location Of Caution Decal Toner Shield Glass Open the front door.

  • Page 81: Laser Unit

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Lift the toner cartridge latch [A]. Press the toner shield glass cover [B] to the left and pull it out. Pull out the toner shield glass [C]. Laser Unit Toner shield glass. ( p.71) Copy tray ( p.55) Pull out the (upper) paper tray.

  • Page 82: Ld Unit

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 LD Unit Do not touch the paint-locked screw [A]. The LD position is adjusted before shipment. Laser unit ( p.71) LD unit [B] ( x 1) Do not screw the LD unit in too tightly when you install it. Polygonal Mirror Motor Laser unit ( p.71)

  • Page 83: Laser Unit Alignment Adjustment

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Two rubber bushings [A] Laser unit cover [B] ( x 1) Polygonal mirror motor [C] ( x 4) After reassembling, adjust the image quality ( p.111). Laser Unit Alignment Adjustment Reinstall the copy exit tray before you turn the main switch on. The laser beam may go out of the copier when the copy exit tray is not installed.
  • Page 84 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Install the screw (through the slot [D]) loosely into the hole beneath the slot (do not tighten the screw). Install the four screws for the laser unit loosely (do not tighten the screws). When you rotate the lever clockwise or counterclockwise by one notch of the lever, the corners of the pattern shift by 0.4 mm (from the leading and trailing edges).

  • Page 85: Pcu Section

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 PCU Section Toner bottle with the holder [A] Open the right door. Press the latch [B] and pull out the PCU [C]. Do not touch the OPC drum surface with bare hands. Load new developer ( p.80).

  • Page 86: Pick-Off Pawls And Toner Density Sensor

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Pick-off Pawls and Toner Density Sensor Do not turn the PCU upside down. This causes toner and developer to spill out. PCU ( Previous procedure) Pawl [A] Pull down the pawl and release the bottom end. Toner density sensor [B] ( x 1) The toner density sensor is taped to the bottom of the PCU.

  • Page 87: Opc Drum

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 OPC Drum PCU ( p.76) Front side piece [A] ( x 1) Rear side piece [B] ( x 2, 1 coupling) Separate the drum section [C] from the developer section [D]. To ensure that the left-side gears line up, keep the drum cover [E] closed when reinserting the front side piece.

  • Page 88: Charge Roller And Cleaning Brush

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Charge Roller and Cleaning Brush OPC Drum ( Previous procedure) Holding pin [A] Stepped screw [B] Charge roller [C] and cleaning brush [D] (with the holders and springs) Turn the gear [E] (as necessary) so that the rear holder [F] comes out. When reassembling, adjust the image quality ( p.81).

  • Page 89: Developer

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Apply toner to the edge of the new cleaning blade when you replace the cleaning blade. This prevents possible damage to the OPC drum and blade. After installing the cleaning blade, remove some of the toner from the old blade with your finger.

  • Page 90: After Replacement Or Adjustment

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Release the hook [B]. 10. Set the coupling [C] back to the shaft. 11. Turn the coupling in the direction of the arrow [D] to remove developer from the roller. 12. Turn the bottom part [E] over and rotate the gears to remove the developer. 13.

  • Page 91: Toner Supply Motor

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Toner Supply Motor Copy tray ( p.55) Open the front door. Toner bottle holder ( p.76) Toner supply motor [A] ( x 1)

  • Page 92: Paper Feed Section

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Paper Feed Section Paper Feed Roller Paper cassette Clip [A] Push the shaft back through the opening, and tilt it up. If the black plastic bushing [B] comes off, make sure you remount it when reinstall the shaft. Paper feed roller [C]...

  • Page 93: Friction Pad

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Friction Pad Paper cassette Clip [A] Push the shaft back through the opening, so that the roller moves clear of the friction pad. Friction pad [B] Paper End Sensor Paper cassette Paper end sensor [A] ( x 1)

  • Page 94: Exit Sensor

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Exit Sensor - Non-Duplex Models - Open the right door. Front right cover ( p.57) Guide [A] ( x 2) Exit sensor bracket [B] ( x 1) Exit sensor [C] ( x 1) - Duplex Models - Open the right door.

  • Page 95: By-Pass Feed Roller And Paper End Sensor

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Exit sensor bracket [E] ( x 1) Exit sensor [F] ( x 1) By-Pass Feed Roller and Paper End Sensor By-pass tray ( p.58) If you have a support to keep the by-pass tray within the reach of the connector cable, you do not need to disconnect the connector.

  • Page 96: Registration Roller

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Registration Roller PCU ( p.76) Front cover ( p.56) Right door ( p.58) Rear cover ( p.54) High-voltage power supply ( p.89) Registration clutch ( p.89) Unhook the springs [A] and [B] at the rear and front sides. Guide support [C] and guide [D] ( x 1, x 1)

  • Page 97: By-Pass Paper Size Switch

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 By-Pass Paper Size Switch By-pass tray ( p.58) Tray lever [A] ( x 1, 1 pin) Lift the upper tray [B] By-pass paper size switch [C] ( x 1) When reinstalling the switch: Move the paper guides to their middle position (about halfway between fully open and fully closed), and install the round gear so that the hole in the gear [D] aligns with the peg [E] on the sliding gear.

  • Page 98: Registration Clutch

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Registration Clutch Rear cover ( p.54) High-voltage power supply board (with the bracket) [A] ( x 4, all connectors) Registration clutch [B] ( x 1, x 1) Registration Sensor Open the right door. Registration sensor [A] ( x 1)

  • Page 99: Upper Paper Feed Clutch And By-Pass Feed Clutch

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Upper Paper Feed Clutch and By-Pass Feed Clutch Rear cover ( p.54) High-voltage power supply board ( p.89) Clutch cover [A] ( x 2, 2 bushings, x 2 ) Paper feed clutch [B] ( x 1) By-pass feed clutch [C] ( x 1) Make sure that the rotation-prevention tabs [D] on the clutches fit correctly into...

  • Page 100: Relay Sensor

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Relay Sensor Relay clutch ( Previous procedure) Sensor bracket [A] ( x 1) Relay sensor [B] ( x 1) Lower Paper Feed Clutch (Two-tray Models Only) Rear lower cover ( p.54) Clutch bracket [A] ( x 2) Lower paper feed clutch [B] ( x 2, 1 bushing, x 1)

  • Page 101: Vertical Transport Sensor (Two-Tray Models Only)

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Vertical Transport Sensor (Two-tray Models Only) Right lower cover ( p.59) Metal plate [A] ( x 3) Vertical transport sensor [B] ( x 1) Paper Size Switch Paper cassette Switch cover [A] ( x 1) Paper size switch [B] ( x 1)

  • Page 102: Image Transfer

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Image Transfer Image Transfer Roller Do not touch the transfer roller surface with bare hands Open the right door. Lift the plastic holders [A] with the image transfer roller [B]. Leave the springs under the holders. Make sure that the pegs [C] on the holders [D] engage with the springs when you reassemble.

  • Page 103: Image Density Sensor

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Image Density Sensor Open the right door. Plastic cover [A] Image transfer roller ( Previous procedure) Push down on the notch [B] to free the sensor. Image density sensor [C] ( x 1)

  • Page 104: Fusing

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Fusing Fusing Unit The fusing unit can become very hot. Make sure that it has cooled down sufficiently before you handle it. Turn off the main switch, and unplug the machine. Front right cover Open the right door. Fusing unit [A] ( x 2, x 4)

  • Page 105: Fusing Lamps

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Fusing Lamps Fusing unit Separate the hot roller section [A] from the pressure roller section [B] ( x 4). Front holding plate [C] ( x 1) Rear holding plate [D] ( x 1) Fusing lamp with the connector (600W) [E] ( x 2) Fusing lamp with the connector (550W) [F] ( x 2)

  • Page 106: Hot Roller Stripper Pawls

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Hot Roller Stripper Pawls Hot roller section (See above) Roller guard [A] ( x 3) Metal holders [B] (1 holder for each) Hot roller stripper pawls [C] (1 spring for each) Hot Roller Hot roller stripper pawls (See above) Hot roller [A] (2 C-rings, 1 gear, 2 bearings)

  • Page 107: Thermostat

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Thermostat Hot roller (See above) Thermostat [A] ( x 2 for each) Pressure Roller and Bushings Separate the hot roller section from the pressure roller section ( p.96). Fusing entrance guide [A] ( x 2) 2 springs [B] 2 pressure arms [C] 2 Bushings [D] Pressure roller [E]...

  • Page 108: Nip Band Width Adjustment

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 NIP Band Width Adjustment Do this adjustment when the fusing unit is at its operating temperature. The size of the OHP sheet must be A4/LT LEF. Any other sizes may cause a paper jam. Pressure roller Hot roller Place an OHP sheet on the by-pass feed table.

  • Page 109: Cleaning Roller

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Cleaning Roller Pressure roller and bushings ( p.98) Cleaning roller [A]...

  • Page 110: Duplex Unit (Duplex Models B269/B277 Only)

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Duplex Unit (Duplex Models B269/B277 Only) Duplex Exit Sensor Open the right door. Sensor bracket [A] ( x 1) Another bracket [B] comes off with the sensor bracket. Duplex exit sensor [C] ( x 1) Duplex Entrance Sensor Open the right door.

  • Page 111: Duplex Inverter Sensor

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Duplex Inverter Sensor Copy tray [A] ( x 2) Exit cover [B] ( x 1) Sensor bracket [C] ( x 1, x 1) Duplex inverter sensor [D] ( x 1) Duplex Transport Motor Open the right door.

  • Page 112: Duplex Inverter Motor

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Detach the chain and spring from the frame, and lower the right door. Cover [A] ( x 1) Motor bracket [B] ( x 4, x 1). Duplex transport motor [C] ( x 2) Duplex Inverter Motor Rear cover Exhaust fan ( p.106)

  • Page 113: Other Replacements

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Other Replacements Quenching Lamp PCU ( p.76 ) Quenching lamp [A] ( x 1) High-Voltage Power Supply Board Rear cover ( p.54) High-voltage power supply board [A] ( x 2, 3 standoffs, all connectors)

  • Page 114: Bicu (Base-Engine Image Control Unit)

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 BICU (Base-Engine Image Control Unit) Rear cover ( p.54) BICU [A] ( x 7, all connectors, 2 flat cables) Remove the NVRAM [B] from the old BICU and install it on the new BICU when you replace the BICU. The NVRAM keeps machine-specific data. Main Motor Rear cover ( p.54)

  • Page 115: Rear Exhaust Fan (B269/B277 Only)

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Rear Exhaust Fan (B269/B277 Only) Rear cover ( p.54) Rear exhaust fan [A] ( x 2, x 1) Reassembling - Make sure that the arrow on the fan [B] points the outside of the copier when you reassemble The arrow indicates the direction of the air current.

  • Page 116: Psu (Power Supply Unit)

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Make sure that the arrow on the fan [C] points the outside of the copier when you reassemble. The arrow indicates the direction of the air current. PSU (Power Supply Unit) Left cover ( p.56) PSU [A] (All connectors, x 6)

  • Page 117: Gearbox

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Gearbox - Replacement Procedure - Inverter tray [A] Two screws [B] from the middle rear cover This step releases the topmost part of the BICU bracket. High-voltage power supply board (with the bracket) ( p.89) BICU (with the bracket) [C] ( x 6) If you have difficulty to remove the bracket, remove the screw at the middle of the crosspiece (see step 6).
  • Page 118 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 PCU ( p.76) This step releases the gear (on the gearbox) that drives the PCU. Ground plate [E] ( x 2) Gearbox [F] ( x 5, 1 belt) Do not change the position of the spring [G] and make sure that the bushing [H] on the PCU drive shaft is in the correct position you when you reassemble.
  • Page 119 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 - Gear Arrangement in the Gearbox - The gears are numbered 1 to 12 in the order in which they are to be installed in the gearbox. These numbers show both on the gearbox and on the front (exposed) surface of each gear. If the gears fall out, start by finding gear number 1 and installing it onto location number 1 (setting it into place so that the side with the printed number stays visible).

  • Page 120: Copy Adjustments Printing/Scanning

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Copy Adjustments Printing/Scanning You need to perform the adjustment after you do a Memory All Clear, and after you replace or adjust any of the following parts. First or second scanner Lens Block Scanner Motor Polygonal Mirror Motor Paper Tray Paper Side Fence For detailed explanations about how to access and use the SP modes, see Section...
  • Page 121 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Tray SP mode Specification (Optional PFU tray 1) By-pass feed SP 1002 4 Duplex SP 1002 5 A: Leading Edge Registration B: Side-to-side Registration - Blank Margin - If the leading edge or side-to-side registration cannot be adjusted to within the specification, then adjust the leading-edge blank margin or the left-side blank margin.

  • Page 122: Scanning

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Scanning Before doing the following scanner adjustments, check and adjust the printing leading-edge and side-to-side registrations and the printing blank margins (as described above). Use an A3 test chart to perform the following adjustments. - Registration: Platen Mode - Place the test chart on the exposure glass and make a copy from one of the feed stations.

  • Page 123: Adf Image Adjustment

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Check the magnification ratio. If necessary, adjust the magnification using the following SP mode. SP mode Specification Main Scan Magnification SP 4009 1.0% - Sub-Scan Magnification - Place the OS-A3 test chart on the exposure glass and make a copy from one of the feed stations.
  • Page 124 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 B: Side-to-side registration Make a temporary test chart as shown above, using A3/11" x 17" paper. Place the temporary test chart on the ADF and make a copy from one of the feed stations. Check the registrations, and adjust as necessary with the appropriate SP modes, as follows.

  • Page 125: Troubleshooting

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Troubleshooting Service Call Conditions Summary There are four levels of service call conditions. Level Definition Reset Procedure To prevent damage to the machine, the main Enter SP mode, and then turn machine cannot be operated until the SC has the main power switch off and been reset by a service representative (see the note below).

  • Page 126: Sc Code Descriptions

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 SC Code Descriptions Symptom Possible Cause Definition Exposure Lamp Error Exposure lamp defective Exposure lamp stabilizer defective Exposure lamp connector defective The standard white level Dirty scanner mirror or scanner mirror was not detected properly out of position when scanning the white SBU board defective plate.
  • Page 127 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Symptom Possible Cause Definition correct the black level. Incorrect position or width of white The automatic SBU plate scanning ( p.151) adjustment has failed to BICU board defective correct the white level SBU board defective twenty times consecutively.
  • Page 128 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Symptom Possible Cause Definition the charge roller is High voltage supply board defective detected. Poor connection of the PCU Polygonal mirror motor error The polygon mirror motor Polygon mirror motor defective does not reach operating Poor connection between the speed within 10 seconds polygonal mirror motor driver and the after the motor ON signal...
  • Page 129 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Symptom Possible Cause Definition A development bias leak Poor connection of the PCU signal is detected. High voltage supply board defective TD sensor initial setting error ID sensor defective No developer Drum does not turn TD sensor initial setting is Development roller does not turn not performed correctly.
  • Page 130 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Symptom Possible Cause Definition after the last signal. Tray 2 lift motor malfunction (Optional paper tray units) The paper lift sensor fails Paper lift sensor defective to activate twice Tray lift motor defective continuously after the tray Too much load on the drive lift motor has been on for mechanism...
  • Page 131 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Symptom Possible Cause Definition rises less than 7 degrees position in 2 seconds, and this Fusing lamp open continues 5 times Power supply board defective consecutively. The fusing temperature is not detected in 25 or 35 seconds.
  • Page 132 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Symptom Possible Cause Definition after the main power switch is turned on, or are not detected within 1 second after operation begins. Fusing thermistor open (rear) The fusing temperature Fusing thermistor defective or out of detected by the thermistor position is below 71C and is not Power supply board defective...
  • Page 133 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Symptom Possible Cause Definition The fusing temperature Thermistor defective or out of varies 50C or more within position 1 second, and this occurs Power supply unit defective 2 consecutive times. Jam error detected 3 times in succession The exit sensor and Paper jams can occur for the following the duplex sensor...
  • Page 134 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Symptom Possible Cause Definition GDI machines) B245/B268/B269/B276/B277.) An ADF (including the The connector of the ADF is removed correct ADF) is installed while the machine is in the energy while the copier is in the saver mode. energy saver mode.
  • Page 135 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Symptom Possible Cause Definition BICU. Controller board communication abnormal Communication error The connector is abnormal between between the scanner part the controller board and the BICU of the controller board and board. BICU. ADF gate abnormal 1 ADF main board defective The ADF Gate signal line Input/output board defective...
  • Page 136 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Symptom Possible Cause Definition did not issue a video transmission end command within the specified time. Watchdog error The CPU does not access Controller board defective the watchdog register Software malfunction – download within a certain time. controller firmware again Kernel mismatch error Software bug...
  • Page 137 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Symptom Possible Cause Definition Self-diagnostic Error: NVRAM/Optional NVRAM The NVRAM or optional NVRAM returned an error Replace the NVRAM on the controller during the self-diagnostic board test. Self-diagnostic Error: RAM The resident RAM returned a verify error Download controller firmware again during the self-diagnostic test.
  • Page 138 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Symptom Possible Cause Definition Mechanical total counter Mechanical total counter defective The mechanical total BICU defective counter does not work Disconnected mechanical total properly. counter Engine total counter error The checksum of the total NVRAM on the BICU defective counter is not correct.
  • Page 139 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Symptom Possible Cause Definition Status error (laser optics housing unit) The optics-housing unit does not become ready Software defective within 17 seconds after the request. NVRAM error The machine detects a NVRAM defective discrepancy in the Poor connection between BICU and NVRAM write/read data NVRAM...
  • Page 140 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Symptom Possible Cause Definition control center. Software continuity error The software attempted to perform an unexpected No operation required. This SC code operation. However, does not appear on the panel, and is unlike SC990, the object only logged.
  • Page 141 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Symptom Possible Cause Definition download mode, logging is not performed with SC999. If the machine loses power while downloading, or if for some other reason the download does not end normally, this could damage the controller board or the PCB targeted for the download and prevent subsequent downloading.

  • Page 142: Electrical Component Defects

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Electrical Component Defects Sensors Component Condition Symptom The Paper Jam message will appear Open whenever a copy is made (paper has not 111-2 Registration reached the sensor). (BICU) The Paper Jam message appears even if Shorted there is no paper at the sensor.
  • Page 143 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Component Condition Symptom there is no paper in the tray. The Paper Jam message will appear whenever a copy is made from the 2nd paper tray. (B276/B277/B268/B269 models only). Shorted The Paper End indicator lights when the Open bypass tray is selected, even if there is paper in the tray.

  • Page 144: Switches

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Component Condition Symptom not function correctly. The Paper Jam message will appear Open whenever a duplex copy is made (paper 222-2 Duplex Entrance has not reached the sensor). (DCB) The Paper Jam message appears even if Shorted there is no paper at the sensor.
  • Page 145 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Component Condition Symptom The CPU misdetects or is not able to 136- detect the size of the paper set in the By-pass Paper Size 1,2,4,5 Open bypass tray, causing possible misfeeds (BICU) when feeding from this tray. The Cover Open indicator is lit even if the Open 124-5...

  • Page 146: Blown Fuse Conditions

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Blown Fuse Conditions All the fuses in the following table are on the power supply board. Rating Fuse 120 V 220 – 240 V 15A/125V 8A/250V 5A/125V 2.5A/250V 1A/250V 1A/250V 4A/250V 4A/250V 4A/250V 4A/250V 4A/250V 4A/250V 4A/250V 4A/250V...

  • Page 147: Led Display

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 LED Display BICU Number Function Monitors the +5 V line for the CPU and the surrounding circuit. LED 1 Usually, this LED is blinking.

  • Page 148: Service Tables

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Service Tables Service Program Mode Do not let the user access the SP mode. Only service representatives are allowed to access the SP mode. The machine quality or its operation is NOT guaranteed if persons other than service representatives accesses the SP mode. How to Enter the SP Mode The following two modes are available: SP Mode (Service Program Mode): The SP Mode includes the programs that are...
  • Page 149 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 While holding down the [Enter] key, press the [1] key (on the numeric keypad). While holding down the [Enter] key, press the "OK" key. Selecting Programs When a blinking underscore (or several blinking underscores) shows, you can type a number from the numeric keypad [D].

  • Page 150: Sp Mode Tables

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 SP Mode Tables The following codes are used: Asterisk (*): The settings are saved in the NVRAM. Most of them return to the default values when you execute SP 5801 2 The DFU menu is for design or factory use only. You must not change the settings. Brackets ([ ]): The brackets enclose the setting rage, default value, and minimum step (with unit) as follows: [Minimum Maximum / Default / Step].
  • Page 151 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Paper Feed Timing Adjusts the amount of buckle the paper feed clutch applies to the paper after the 1003* registration sensor is activated. A higher setting applies greater buckling. 1003 1 1st tray [0 ~ 10 / 5 / 1 mm/step] 1003 2 2nd tray (B276/B277 only) [0 ~ 10 / 5 / 1 mm/step] 1003 3 Optional tray...
  • Page 152 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 1105 12 Warm Up Low-End Display Fusing 1106 1106 1 Displays the fusing temperature (center) 1106 2 Displays the fusing temperature (end) Fusing Soft Start Adjusts the number of zero-cross cycles of the fusing lamp AC supply needed to bring the fusing lamp power to 100% while bringing the lamp up to the standby 1107* temperature or while copying.

  • Page 153: Sp2-Xxx (Drum)

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Feed Clutch Boost Adjusts the amount of extra push that the feed clutch gives to the paper after the skew has been corrected at registration. This feature helps the registration roller 1903* feed certain types of paper (such as thick paper). Increase the value if thick paper is jamming after feeding from the registration roller.
  • Page 154 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Adjusts the leading edge erase margin. [0.0 ~ 9.0 / 3.0 / 0.1 mm/step] ( p.111) Trailing Specification: 2 +2.5/–1.5 mm 2101 2 Adjusts the trailing edge erase margin. The rear trailing edge is this value plus 1.2 mm.
  • Page 155 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 TD Sensor Output Value Display 2220 Displays: Vt: the current TD sensor output value and Vref: the target TD output value Vts (SP 2926) + correction for 2220 1 ID sensor output. The TD sensor output value changes every copy. If 1 > 2, toner is supplied to the development unit.
  • Page 156 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 current if toner remains on the roller after cleaning. (Remaining toner may cause dirty background on the rear side.) ( p.248) Forced Developer Churning 2802 Initializes the developer and checks the TD sensor output (Vt). The machine mixes the developer for 2 minutes while reading and displaying the Vt value.
  • Page 157 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Toner Supply Mode 2921* [0 = Sensor 1 / 1 = Sensor 2 (DFU) / 2 = Fixed 1 (DFU) / 3 = Fixed 2] Selects the toner supply mode. Under normal conditions this should be set to 2921 1 “0”.
  • Page 158 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 to this value during the TD sensor initial setting process]. This SP is effective only when SP 2921 is “0”, “1”, or “2”. ID Sensor Control 2927* [0 = No / 1 = Yes] Selects whether the ID sensor is or is not used for toner density control. This 2927 1 value should normally be left at “1”.

  • Page 159: Sp4-Xxx (Scanner)

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Toner Density Sensor Standard [0 / 2.5 / 5/ 0.01V/step] DFU 2997* Voltage Main Scan Magnification [–0.5 ~ +0.5 / 0.0 / 0.1%/step] 2998* Adjusts the magnification along the main scan direction, for all print modes 2998 1 (copy, printing).
  • Page 160 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 printing margin for image adjustments. 4012 1 Leading edge 4012 2 Trailing edge [0 ~ 9.0 / 1.0 / 0.1 mm/step] 4012 3 Left 4012 4 Right Scanner Free Run 4013 Performs a scanner free run with the exposure lamp on. Press ON or to start. 4013 1 Press OFF to stop.
  • Page 161 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Other models: When the ASP detects the A4 size, the controller interprets it as the LT size. 2. 8K/16K (for the China model only) When the ASP detects the A3/B4 SEF, the controller interprets it as the 8K SEF.
  • Page 162 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 machine initialization. Normally, the value is 10. Other values indicate that the adjustment has ended unsuccessfully. White Target [0 511 / 511 / 1/step] 4901 5* Displays the target value for the white-level adjustment. White Result [0 511 / 0 / 1/step] 4901 6 Displays the result of the white-level adjustment.
  • Page 163 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 (The exposure lamp shuts off automatically after 180 seconds.) 4903* ADS Level [0 255 / 252 / 1/step] 4903 1 Adjusts the ADS level. 4904* ADS Lower Limit [0 255 / 80 / 1/step] 4904 1 Adjusts the ADS lower limit. 4905* ADS Level [0 = All / 1 = One]...
  • Page 164 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 default of 3 and Photo 1, 3 have a default of 1. 1: No removal applied. 2 – 5: Removal applied at the level specified here. The higher the setting (level), the less clear the image will become (more texture removal). This setting is only applied to the originals in SP 4921.

  • Page 165: Sp5-Xxx (Mode)

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 4931 1 Sharpness-Solid (Copy) 4931 3 Sharpness-Solid (Scanner) Sharpness-Low ID [–2 ~ 2 / 0 / 1/step] 4932* Adjust the clarity. This setting is only applied to the originals in SP 4921. 4932 1 Sharpness- Low ID (Copy) 4941* White Line Erase [0 ~ 2 / 1 / 1/step]...
  • Page 166 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 counter will both increment by two for each A3/11" x 17" sheet. 0: None Optional Counter Type 11: MF key card (Increment) 5113* 12: MF key card (Decrement) 5113 1 Selects the corresponding key for installed devices such as coin lock. Clr-OP Count Remv [0=Yes / 1=Standby only / 2=No] 5120*...
  • Page 167 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Output Check 5804 p.179) Area Selection 5807* Selects the display language group. 1 = Japan, 2 = North America, 3 = Europe, 4 = Taiwan, 5 = Asia, 5807 1 6 = China, 7 = Korea SP 5807 1 is not cleared by SP 5801 2 ( p.174).

  • Page 168: Sp6-Xxx (Peripherals)

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 5827 1 Downloads programs to the machine Printer Free Run 5901 5901 1 Executes the free run. Press "ON" to start; press "OFF" to stop. Test Pattern Print 5902 5902 1 ( p.187) Plug & Play Setting 5907* Selects the brand name and production name for the Plug and Play function.
  • Page 169 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 ADF Adjustment ( p.114 6006* NOTE: Available menus depend on the machine model and its configuration. ADF Adjustment (StoS/Front Regist) [–5.0 ~ +5.0 / 0.0 / 0.1 mm/step] 6006 1 Adjusts the side-to-side registration for the front side of the original, for ADF mode.

  • Page 170: Sp7-Xxx (Data Log)

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Adjusts the interval used for the shading processing in the ADF mode. Light and 6910 1 heat in the room may affect the scanner response. Reduce this setting if copy quality indicates that the white level is drifting during ADF copy jobs. SP7-XXX (Data Log) Total Operation 7001*...
  • Page 171 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Paper is caught at the vertical transport sensor. Counter Each P Jam (Off-3 Vertical SN) 7504 31 Paper does not reach the vertical transport sensor in the optional paper feed unit. Counter Each P Jam (On-3 Vertical SN) 7504 32 Paper is caught at the vertical transport sensor in the optional paper feed unit.
  • Page 172 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Paper is caught at the one-bin tray. Counter-Each O Jam [0 ~ 9999 / 0 / 1/step] Displays the total number of the original jams on the ADF that have occurred 7505* at a certain timing or at a certain location. Counter-Each O Jam (Off-Regist SN) 7505 210 The original does not reach the registration sensor.
  • Page 173 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Memory/Version/PN 7801 Memory/Version (BICU) 7801 2 Displays the version of the BICU board Memory/Version (ADF) 7801 5 Displays the P/N and suffix of the ADF ROM. Memory/Version (Printer/Scanner) 7801 15 Displays the P/N and suffix of the Printer/Scanner ROM. Display–PM Count 7803* 7803 1 Displays the PM counter.

  • Page 174: Sp8-Xxx (History)

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Display-Self-Diag 7832* Displays the SC codes and the number of their occurrences. Each number is in 7832 1 the range of 0 to 9999. Dsply–Info Count Displays the total operating time or the total number of operations. The time is 7991* displayed in the following format: day:hour:minute:second.
  • Page 175 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 front and reverse sides of an original (fed from the ADF) are scanned. S: Total Scan PGS [0 9999999 / 0 / 1 sheet/step] 8195* Displays the total number of scanned originals. Both sides are counted when 8195 1 the front and reverse sides of an original (fed from the ADF) are scanned.
  • Page 176 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 F: Total Prt PGS [0 9999999 / 0 / 1 sheet/step] 8383* 8383 1 Displays the print count of the fax application program. P: Total Prt PGS [0 9999999 / 0 / 1 sheet/step] 8384* 8384 1 Displays the print count of the printer application program. S: Total Prt PGS [0 9999999 / 0 / 1 sheet/step] 8385*...
  • Page 177 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Original Print 8422 7 C: PrtPGS/Dup Comb(4>) T: PrtPGS/Ppr Size [0 9999999 / 0 / 1 sheet/step] Displays the total print count classified by paper size. This is the total for all 8441* application programs. 8441 1 (A3) 8441 2 (A4) 8441 3 (A5) 8441 4 (B4)
  • Page 178 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 P: PrtPGS/Ppr Size [0 9999999 / 0 / 1 sheet/step] 8445* Displays the number of pages printed by the copier application program. 8445 1 (A3) 8445 2 (A4) 8445 3 (A5) 8445 4 (B4) 8445 5 (B5) 8445 6 (DLT) 8445 7 (LG) 8445 8 (LT)

  • Page 179: Sp9-Xxx (Etc.)

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 8462 4 Thick 8462 7 OHP 8462 8 Other P: PrtPGS/Ppr Type [0 9999999 / 0 / 1 sheet/step] Displays the total print count classified by paper size. This is the total for all 8464* application programs. 8464 1 Normal 8464 4 Thick 8464 7 OHP...

  • Page 180: Using Sp Modes

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Using SP Modes Adjusting Registration and Magnification To adjust the registration and magnification, you need to use several service programs. The chart shows an example of the procedure to adjust the machine in the basic configuration.

  • Page 181: Id Sensor Error Analysis (Sp 2221)

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 ID Sensor Error Analysis (SP 2221) The image quality may become very bad when the ID sensor does not operate properly. However, there is no such SC code that indicates ID-sensor malfunction; instead, SP 2221 shows you some information on the ID sensor. Check this information when the image quality...

  • Page 182: Display Aps Data (Sp 4301 1)

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 is not very good. The table lists the information shown with SP 2221 (ID Sensor Error Analysis). Error condition Possible cause Remarks SP 2221 1 Vsg ID sensor defective Vsg < 2.5V or (VG in the display) ID sensor dirty (Vsg –...

  • Page 183: Memory Clear

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Example 1 indicates that the paper size and its orientation is "8 x 13 SEF," and that the document feeder (or platen cover) is open. Example 2 indicates that the paper size and its orientation is "A4 LEF," and that the document feeder (or platen cover) is closed. The "Paper Size"...
  • Page 184 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Machine Data NVRAM Cleared by Remarks Basic All data BICU SP 5801 2 Any data other Engine data BICU SP 5998 1 than controller data SCS, IMH, MCS, Copier application, Printer application, Controller data Controller SP 5801-xxx Scanner application, Web service/network...

  • Page 185: Input Check (Sp 5803)

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Be sure to print out all the lists. You have to manually change the SP settings if the NVRAM data upload ends abnormally. Select SP 5801 2. Press the OK key. Select "Execute." The messages "Execute?" followed by "Cancel" and "Execute" shows.
  • Page 186 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 The sign "01H" or "00H" show (see the table below). - Input Check Table - Num. Sensor/Switch Safety SW Open Closed Safety SW-LD 5V Open Closed Right Cover SW Open Closed Right Low Cover SW Open Closed Tray Cover SW Open...
  • Page 187 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Num. Sensor/Switch BK-Lift M Lock Locked Not locked Total CO Install Installed Not installed Key CO Install Installed Not installed L-Synchronization Detected Not detected DF-Position S Detected Not detected DF-Cover Open S Detected Not detected DF-Original Set S Detected Not detected DF-Registration S...

  • Page 188: Output Check (Sp 5804)

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Paper Feed Unit North Not set LT SEF LG SEF A4 LEF -- A4 SEF LT LEF A3 SEF America China Not set LT SEF LG SEF A4 LEF -- A4 SEF LT LEF A3 SEF By-Pass Tray 8x13...
  • Page 189 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Select "ON." To stop the operation, select "OFF." - Output Check Table - Number 005, 006, 040, and 041 may not respond when the fusing temperature is high. Num. Component Main Motor Forward Main Motor Reverse Quenching Lamp Toner Supply Motor Forward Fan Motor High...

  • Page 190: Serial Number Input (Sp 5811)

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Num. Component DF-Transport Motor DF-Feed Motor DF-Feed Clutch DF-Pickup Solenoid DF-Stamp Solenoid DF-Gate Solenoid 1 bin Gate Solenoid 1 bin Tray Motor 1 bin Tray Motor Hold Fusing Solenoid Duplex Fan Motor High Duplex Fan Motor Low Serial Number Input (SP 5811) - Specifying Characters - SP 5811 1 specifies the serial number.
  • Page 191 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 may damage the BICU or memory. - Overview - You can copy the data from the NVRAM to a flash memory card (NVRAM Upload), or from a flash memory card to the NVRAM (NVRAM download). SP 5824 1 From the BICU to a flash (NVRAM Upload) memory card...

  • Page 192: Firmware Update Procedure

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 procedure. Turn off the main switch. Remove the memory card. - NVRAM Download (SP 5825 1) - SP 5825 1 copies the data from the flash memory card to the NVRAM. The following data is NOT copied (the data in the NVRAM remains unchanged). SP 8221 1 (ADF Original Feed [Front]) SP 8221 2 (ADF Original Feed [Back]) SP 8381 1 (Total: Total Printer Pages)
  • Page 193 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Engine (BICU) Firmware Update Procedure Turn the main switch off. Remove the card cover [B] (1 rivet). Insert the flash memory card [A]. Press down the power switch on the operation panel and hold it, and turn on the main switch.
  • Page 194 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Make sure the message "End Sum..." shows. This message indicates that the program has ended normally. Turn off the main switch. Remove the flash memory card. 10. Replace the card cover [B] (1 rivet). 11. Turn the main switch on. 12.
  • Page 195 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Insert the flash memory card [B] as shown above Turn on the main power switch Push the printer application key [C] Push the OK key [D] and then push Execute.

  • Page 196: Test Pattern Print (Sp 5902 1)

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Do not turn the machine off while the message “Now Writing” shows. This message indicates the program is running. Make sure the message “Completed” shows. This message indicates the program has successfully ended. Turn off the main switch Remove the flash memory card Replace the slot cover [A] (1 x Test Pattern Print (SP 5902 1)
  • Page 197 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Test Patterns Using VCU Trimming Area Argyle Pattern (Single Dot) Grayscales (Horizontal) Grayscales (Vertical) Grayscales (Vertical/Horizontal) Grayscales (Vertical/Horizontal Overlay) Grayscales With White Lines (Horizontal) Grayscales with White Lines (Vertical) Grayscales with White Lines (Vertical/Horizontal) Test Patterns Using IPU Pattern Vertical Lines (Single Dot) Horizontal Lines (Single Dot)

  • Page 198: Paper Jam Counters (Sp 7504)

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Test Patterns Using SBU Pattern Grid Pattern (double dot) Gray scale 1 (256 grades) Gray scale 2 (256 grades) Paper Jam Counters (SP 7504) The table lists the menu numbers (the last three digits of SP 7504 XXX) and the paper jam timings and locations.

  • Page 199: Smc Print (Sp 5990)

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Code Paper does not reach the one-bin tray. Paper is caught at the one-bin tray. SMC Print (SP 5990) SP 5990 outputs machine status lists. Select SP 5990. Select a menu: Basic machine: 001 All, 002 SP, 003 UP, 004 Log, or 005 Big Font GDI machine: 001 All (Data List), 002 SP (Mode Data List), 003 User Program, 004 Logging Data, 005 Diagnostic Report, 006 Non-Default, 007 NIB Summary, 008 Net File Log, 021 Copier User Program, 022 Scanner SP, 023 Scanner User Program,...

  • Page 200: Adf Aps Sensor Output Display (Sp 6901)

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Jam History Codes Code Meaning Original does not reach the registration sensor. Original caught at the registration sensor. Original does not reach the original exit sensor. Original caught at the original exit sensor. Original does not reach the original reverse sensor. Original caught at the original reverse sensor.
  • Page 201 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 11" x 8 " LEF A4 LEF 11" x 17" " X 8 " SEF A5 SEF — B5 SEF 1: Detected...

  • Page 202: Detailed Section Descriptions

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Detailed Section Descriptions Overview Component Layout The above illustration is the B269/B277 model. B245/B268/B276: No duplex unit, one paper tray 1. 2nd Mirror 21. Registration Roller 2. Exposure Lamp 22. Registration Sensor 3. 1st Mirror 23. By-pass Tray 4.

  • Page 203: Paper Path

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 11. Inverter Roller 31. Bottom Plate 12. Duplex Inverter Sensor 32. PCU 33. Development Roller 13. Duplex Entrance Sensor 14. Hot Roller 34. WTL 15. Upper Transport Roller 35. Polygon Mirror Motor 16. Pressure Roller 36. Laser Unit 17.

  • Page 204: Drive Layout

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Drive Layout 1. Scanner Motor 6. Relay Clutch 2. Main Motor 7. Lower Paper Feed Clutch 3. Hot Roller 8. By-pass Feed Clutch 4. OPC Drum 9. Upper Paper Feed Clutch 5. Development Roller 10. Registration Clutch...

  • Page 205: Board Structure

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Board Structure Block Diagram Only B269/B277 models contain the duplex unit. The one-bin tray is for models B268/B269 (with the optional controller box).

  • Page 206: Bicu (Base Engine And Image Control Unit)

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 BICU (Base Engine and Image Control Unit) The main board controls the following functions: Engine sequence Timing control for peripherals Image processing, video control Operation control, system control (Basic machine only) Machine control Drive control for the sensors, motors, and clutches of the printer and scanner High voltage supply board control Serial interfaces with peripherals Fusing control...

  • Page 207: Copy Process Overview

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Copy Process Overview 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. This data is converted to a digital signal, processed and stored in the memory.
  • Page 208 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 drum surface. The amount of charge remaining as a latent image on the drum depends on the laser beam intensity, which is controlled by the BICU board. Development The magnetic developer brush on the development roller comes in contact with the latent image on the drum surface.

  • Page 209: Scanning

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Scanning Overview 1. Exposure Lamp 5. Scanner Motor 2. 1st Scanner 6. Original Length Sensor 3. Exposure Glass 7. Original Width Sensors 4. Lens Block 8. Scanner HP Sensor The original is illuminated by the exposure lamp (a xenon lamp). The image is reflected onto a CCD (charge coupled device) on the lens block via the 1st, 2nd, and 3rd mirrors, and through the lens on the lens block.

  • Page 210: Scanner Drive

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Rating Manufacturer Type No. ICP1 DC50 V/1.5 A ROHM CO.,LTD ICP–N38 Scanner Drive 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 211: Original Size Detection In Platen Mode

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 changing the ADF motor speed. Magnification in the main scan direction is done in the BICU board, like for book mode. Magnification in the sub-scan direction can be adjusted by changing the ADF motor speed using SP 6006 5. In the main scan direction, it can be adjusted with SP 4009, like for book mode.
  • Page 212 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Original Size Length Sensors Width Sensors SP 4301 display A4/A3 version LT/DLT version 11" x 17" 11110000 8.5" x 14" 11010000 8.5" x 13" — 11000000 A4-SEF 8.5" x 13" 01000000 A4-LEF 11" x 8.5" 00110000 B5-LEF 8.5"...
  • Page 213 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 the laser diode is stopped to match the copy paper length detected by the registration sensor. This means that copy time for the first page may be slower (because of the longer time required for scanning), but it will be normal for the rest of the job. Original size detection using the ADF is described in the manual for the ADF.

  • Page 214: Image Processing

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Image Processing Overview 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. The BICU board can be divided into three image-processing blocks: the IPU (Image Processing Unit), FCI (Fine Character Image), and VCU (Video Control Unit).

  • Page 215: Sbu (Sensor Board Unit)

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 SBU (Sensor Board Unit) The CCD converts the light reflected from the original into an analog signal. The CCD line has 7,400 pixels and the resolution is 600 dpi (23.6 lines/mm). The CCD has two output lines, for odd and even pixels, to the analog processing circuit. The analog processing circuit performs the following operations on the signals from the CCD: Z/C (Zero Clamp): Adjusts the black level reference for even pixels to match the odd pixels.

  • Page 216: Ipu (Image Processing Unit)

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 IPU (Image Processing Unit) Overview The image data from the SBU goes to the IPU (Image Processing Unit) on the BICU board, which carries out the following processes on the image data: Auto shading White/black line correction Scanner gamma correction Magnification (main scan) Filtering (MTF and smoothing)
  • Page 217 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 All modes can be customized with a range of SP modes that can be adjusted to meet user requirements. The user can select the mode that best suits their original with the following user tool: Original Type: User Tools – Copier Features – Image Adjustment Original Type Mode Targeted Original Type...
  • Page 218 B245/B276/B277/B268/B269 Service Manual 18-Jan-06...
  • Page 219 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Original Modes The machine has 10 original modes. There are two text modes, three photo modes, and five “special” modes. The original mode key on the operation panel has two settings, text and photo. With the default settings, the machine uses “Normal Text (Text 1)”...
  • Page 220 B245/B276/B277/B268/B269 Service Manual 18-Jan-06...
  • Page 221 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 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 is 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 222 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 When you specify "2," instead of "1," in SP 4941 1, the feature erases darker white lines (namely, less whiter lines). Note that this SP does not affect the width of white lines to be erased. Black Line Erase The black line erase feature is the function that erases black lines made by the dust or dirt on the exposure glass.
  • Page 223 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 corrects the CCD output so that grayscale data is proportional to the quantity of light received. The machine has two possible scanner gamma curves: Text and Photo. When selecting Text, the machine does not use scanner gamma  c orrection. As a result, the output is darker than the image density on the original.
  • Page 224 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Mirroring for ADF Mode When making copies using the ADF, the magnification circuit creates a mirror image. This is because the scanning start position along the main scan direction in ADF mode is at the opposite corner of platen mode. In platen mode, the original is placed face down on the exposure glass.
  • Page 225 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 of an edge, the machine applies the MTF filter for edges, using the value set in SP 4930. The higher the setting, the sharper the image. However, this is only used when the customer uses Text 1, Text 2, Photo 1-3, Special 1, Special 2, or Special 5. The default value is “0”...
  • Page 226 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Gradation Processing Overview There are three types of gradation processing (listed below). Refer to the “Default Image Processing Mode for Each Original Type” section for more details on which processes are used for each original mode. Binary picture processing Error diffusion Dithering...

  • Page 227: Video Control Unit (Vcu)

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Video Control Unit (VCU) Fine Character and Image (FCI) The FCI performs image smoothing. 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 above illustration.

  • Page 228: Laser Exposure

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Laser Exposure Overview 1. LD unit 7. 2nd mirror 2. Synchronization detector lens 8. F-theta lens 3. Double toroidal lens 9. Polygon mirror 4. Shield glass 10. Cylindrical lens 5. OPC drum 11. Synchronization detector mirror 6.

  • Page 229: Auto Power Control (Apc)

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Auto Power Control (APC) The LD driver IC drives the laser diode. To prevent the intensity of the laser beam from changing because of the temperature, the machine monitors the current passing through the laser diode (LD). The machine adjusts the current to the laser diode by comparing it with the reference level from the reference circuit.

  • Page 230: Ld Safety Switch

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 LD Safety Switch To ensure technician and user safety and to prevent the laser beam from inadvertently switching on during servicing, there are safety switches at the front and right covers. When the front cover or the right cover is opened, the power supply to the laser diode is interrupted.

  • Page 231: Photoconductor Unit (Pcu)

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Photoconductor Unit (PCU) Overview The PCU consists of the components shown in the above illustration. An organic photoconductor (OPC) drum (diameter: 30 mm) is used in this machine. 1. Cleaning Blade 6. Development Roller 2. Toner Collection Coil 7.

  • Page 232: Drive

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Drive The main motor [A] drives the drum [B] through a series of gears and the drum drive shaft [C]. 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 233: Drum Charge

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Drum Charge Overview This copier uses a drum charge roller to charge the drum. The drum charge roller [A] always contacts the surface of the drum [B] to give it a negative charge of –950 V. The high voltage supply board gives a negative charge of –1700 V to the drum charge roller through the screw [C] and terminal plate [D].

  • Page 234: Charge Roller Voltage Correction

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Charge Roller Voltage Correction Correction for Environmental Conditions With a drum charge roller system, the voltage transferred from roller to drum varies with the temperature and humidity around the drum charge roller. The higher the temperature or humidity is the higher the applied voltage required.

  • Page 235: Id Sensor Pattern Production Timing

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 voltage is compared with Vsg (read from the bare drum at the same time). If the humidity drops, the drum potential goes up (to a higher negative voltage) even if the charge roller voltage supply stays the same (efficiency of voltage transfer is higher with lower humidity).

  • Page 236: Development

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Development Overview The development unit consists of the following parts. Development roller Mixing auger 2 TD sensor Mixing auger 1 Doctor blade This machine uses a single-roller development system. Two mixing augers mix the developer. The toner density (TD) sensor and image density (ID) sensor (see the illustration in the PCU section) are used to control the image density on the copy.

  • Page 237: Drive

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Drive The main motor [A] drives the development roller [B] and mixing augers [C] through a train of gears and the development drive shaft [D]. When the PCU is pushed in, the development drive shaft engages the development roller gear. The development drive gears (except for the gears in the development unit) are helical gears.

  • Page 238: Development Bias

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 front of the machine. Mixing auger 1 [B] returns the excess developer, along with new toner, to the rear of the mixing assembly. Here the developer is reapplied to the development roller. Development Bias This machine uses a negative-positive development system, in which black areas of the latent image are at a low negative charge (about –154 50 V) and white areas are at a high negative charge (about –950 V).

  • Page 239: Toner Supply

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Toner Supply Toner Bottle Replenishment Mechanism When a toner bottle is placed in the bottle holder unit [A] and the unit is pushed in completely, toner shutter [B] moves against the side [C] of the PCU. When the toner bottle holder lever [D] is put back in the original position, the cap [E] on the toner bottle is pulled away and kept in place by the chuck [F].

  • Page 240: Toner Supply Mechanism

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Toner Supply Mechanism The toner supply motor [A] drives the toner bottle [B] and the mylar blades [C]. First, the toner falls down into the toner bottle holder. The toner supply mylar blades transfer the toner to the slit [D].
  • Page 241 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 The four-toner density control modes are as follows. Sensor control 1 Mode Sensor control 1 (SP 2921, “0”): Normally use this setting only Toner supply decision Compare Vt with a reference voltage (Vts or Vref) Toner is supplied to the development unit when Vt is higher than the reference voltage (Vts or Vref).
  • Page 242 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 However, the reference voltage used is always Vts. Toner supply amount Varies Toner end detection Performed Fixed control 1 Fixed control 1 (SP 2921, “2”): For designer’s use only; do not use in Mode the field Toner supply decision Compare Vt with a reference voltage (Vts or Vref) Toner control process This toner control process is the same as sensor control 1 mode.
  • Page 243 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Vsp: The ID sensor output when checking the ID sensor pattern In this way, the reflectivity of both the drum surface and the pattern on the drum are checked, compensating for any variations in the reflectivity of the pattern on the drum or the reflectivity of the drum surface.

  • Page 244: Toner Supply In Abnormal Sensor Conditions

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 For sensor control modes 1 and 2, the toner supply motor on time is decided by the following factors. Vref or Vts TD sensor sensitivity (coefficient: S, value is 0.4) There are seven levels for toner supply motor on time as shown below. Level Decision Motor On Time (seconds)

  • Page 245: Toner Near End/End Detection And Recovery

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 TD Sensor 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. If the machine detects the TD sensor error condition 10 times consecutively, an SC code is generated (SC390) and the machine must be repaired.
  • Page 246 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Toner End Recovery While turning on the main switch, if the front cover is opened for 10 seconds or more and then closed while a Toner End condition exists (following toner bottle replacement), the machine clears the Toner End condition. The recovery procedure is the same as for toner near end. It takes about two minutes.

  • Page 247: Drum Cleaning And Toner Recycling

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Drum Cleaning and Toner Recycling Drum Cleaning The cleaning blade [A] removes any toner remaining on the drum after the image is transferred to the paper. This model uses a counter blade system. The cleaning blade scrapes off toner remaining on the drum. When toner builds up in the cleaning unit, toner at the top of the pile is removed by the toner collection coil [B].

  • Page 248: Toner Recycling

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Toner Recycling Toner picked up by the toner collection coil [A], is transported to the opening [B] in the side of the PCU. Then, this toner falls into the development unit with new toner coming from the toner bottle and it is all mixed together by mixing auger 1 [C] and used again.

  • Page 249: Paper Feed

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Paper Feed Overview There are one or two paper trays, each of which can hold 250 sheets. The paper tray feed stations use a friction pad system. To prevent paper from getting caught inside the machine when the tray is pulled out, the paper feed roller and shaft do not separate from the tray when the tray is pulled out.

  • Page 250: Paper Feed Drive Mechanism

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Paper Feed Drive Mechanism The main motor [A] drives the pick-up and feed mechanism of both the first and second paper trays. The paper feed clutches [B] transfer drive from this motor to the paper feed rollers [C]. When the paper feed clutch turns on, the feed roller starts to feed the paper.

  • Page 251: Paper Lift Mechanism

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Paper Lift Mechanism When the paper tray [A] is closed, projection [B] on the copier frame pushes slider [C] (on the bottom part of the paper tray) off the bottom plate hook [D]. After the release slide comes off, compressed springs lift the bottom plate.

  • Page 252: Paper Size Detection

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Paper Size Detection Paper Tray Size A3, 11" x 17" A4 LEF A4 SEF, 8 " x 11" A5 LEF, 8 " x 14" " x 13" 11" x 8 " * (Asterisk) ON=Not pushed, OFF=Pushed There are three paper size micro-switches [A] on the front right plate of the paper tray unit.
  • Page 253 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 By-pass Tray The by-pass feed paper size switch [A] monitors the paper width. The side fence is connected to the terminal plate gear. When the side fences move to match the paper width, the circular terminal plate rotates over the wiring patterns on the rectangular part of the paper size switch. The patterns for each paper width in the paper size switch are unique.

  • Page 254: Side Fences

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Side Fences If the tray is full of paper and it is pushed in strongly, the fences may deform or bend. This may cause the paper to skew or the side-to-side registration to be incorrect. To correct this, each side fence has a stopper [A] attached to it.
  • Page 255 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 The amount of paper buckle at the registration roller to correct skew can be adjusted with SP 1003. If jams frequently occur after registration, SP 1903 can be used to activate the relay clutch so that the relay roller assists the registration roller in feeding the paper along. When feeding from the by-pass tray, the by-pass feed clutch is activated, turning the by-pass feed roller.

  • Page 256: Image Transfer And Paper Separation

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Image Transfer and Paper Separation Overview The transfer roller [A] touches the surface of the drum [B]. The high voltage supply board supplies a positive current to the transfer roller, which attracts the toner from the drum onto the paper.

  • Page 257: Image Transfer Current Timing

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Drive from the drum through a gear [D] turns the transfer roller. Image Transfer Current Timing There are two transfer current levels: low and high. The image transfer procedure is as follows: When the CPU receives the image writing start signal, the CPU instructs the high voltage supply board to supply +10 microamperes (low transfer current level) to the roller.

  • Page 258: Transfer Roller Cleaning

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Paper Tray/ By-pass Tray By-pass Tray Duplex Duplex By-pass Tray (Special/ (Thick/OHP) (2nd Side) (2nd Side) (Normal) Envelope) A4 SEF B5 SEF A5 SEF HLT SEF — — B6 SEF — — A6 SEF — — Post card/ —...

  • Page 259: Paper Separation Mechanism

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Paper Separation Mechanism The discharge plate [A] and the drum curvature of the drum help the paper to separate away from the drum. The discharge plate is grounded.

  • Page 260: Image Fusing And Paper Exit

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Image Fusing and Paper Exit Overview 1. Paper exit roller 7. Fusing lamps 2. Exit sensor 8. Thermistor 3. Hot roller strippers 9. Thermostat 4. Pressure roller 10. Hot roller 5. Cleaning roller 11. Thermostat 6. Pressure spring...

  • Page 261: Fusing Unit Drive And Release Mechanism

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Fusing Unit Drive and Release Mechanism Fusing Unit Drive The main motor [C] drives the fusing unit through a gear train, and drives the paper exit rollers [A] through the timing belt [B]. Drive Release Mechanism When the right door [I] is open, the spring [G] pushes the top end of the gear holder [F] to the right.

  • Page 262: Fusing Entrance Guide Shift

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 The hot roller [L] takes a shorter time to become hot enough if it is not turning during warming up. When, however, the fusing temperature (at the start) is low, the temperature of the hot-roller surface may become uneven. You can disable this control ( p.142).

  • Page 263: Pressure Roller

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 holes [B] on each side are used as the default setting. If creasing occurs frequently in the fusing unit, adjust the entrance guide to the right, by securing it with the inner holes [C]. This allows more direct access to the gap between the hot roller and the pressure roller.
  • Page 264 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 The fusing temperature is controlled using the thermistors [A]. The CPU checks the output from the fusing thermistor once every 1.5 seconds. The CPU decides how long the lamps must be switched on during the next 1.5 seconds by comparing the following temperatures: The center thermistor temperature and the target center temperature The end thermistor temperature and the target end temperature...

  • Page 265: Overheat Protection

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 temperatures: The Warm Up Temperature (SP 1105 1-2) to output the first print after the Low Power Mode ( p.111) The Copying Temperature (T4: SP 1105 5-6) to output the second print (and after the second) You can raise the Warm Up Temperature to make better the fusing quality of the first print.
  • Page 266 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 feature can fully protect the hardware. The second feature works as the fail-safe feature for the first one. The third feature works as the fail-safe feature for the second one. First Feature: If the fusing temperature reaches 230C (or higher) and stays so for one second, the controller turns the fusing lamp off.

  • Page 267: Duplex Unit

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Duplex Unit Overall The printed page from the fusing unit goes straight through to the exit tray, or upward to the inverter section, depending on the position of the junction gate. If the user selects duplex mode, the page is directed to the inverter tray, then reversed through the duplex unit, and back into the machine for printing the second side.

  • Page 268: Drive Mechanism

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Drive Mechanism 1. Duplex Inverter Roller 4. Duplex Transport Motor 5. Lower Transport Roller 2. Duplex Inverter Motor 3. Upper Transport Roller 6. Middle Transport Roller Basic operation To increase the productivity of the duplex unit, copies are printed as follows. - Larger than A4 Short-edge/LT Short-edge - The paper feed path can hold only one sheet of copy paper at a time.
  • Page 269 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 - Up to A4 Short-edge/LT Short-edge - The paper feed path can hold two sheets of copy paper. Example: 8 pages. The number [A] in the illustration shows the order of pages. The number [B] in the illustration shows the order of sheets of copy paper (if black, this indicates the second side).
  • Page 270 B245/B276/B277/B268/B269 Service Manual 18-Jan-06...

  • Page 271: Feed In And Exit Mechanism

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Feed In and Exit Mechanism During duplex copying, the inverter gate solenoid [A] switches on and the junction gate [B] switches over to direct the paper to the inverter. When the paper trailing edge reaches the duplex inverter sensor [C], the inverter roller [D] reverses its rotation direction and the paper goes to the duplex unit.

  • Page 272: Energy Saver Modes Of Basic Machines

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Energy Saver Modes of Basic Machines This section illustrates the energy saver modes of the basic machine (the machine without the optional controller). For the energy saver modes of the GDI machine (the machine with the optional controller), see the section of "Energy Saver Modes of GDI Machines". Overview The machine has two energy-saver modes: the Low Power Mode and the Night/Off Mode.

  • Page 273: Aof

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 When AOF is off, the engine controller is unable to start the Night/Off Mode. The user should keep AOF on ( > System Settings > Key Operator Tools > AOF). Timers The engine controller references the Energy Saver Timer to start the Low Power Mode, and references the Auto Off Timer to start the Night/Off Mode.

  • Page 274: Energy Saver Modes Of Gdi Machines

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Energy Saver Modes of GDI Machines This section illustrates the energy saver modes of the GDI machine (the machine with the optional controller). For the energy saver modes of the basic machine (the machine without the optional controller), see the section of "Energy Saver Modes of Basic Machines". Overview The machine has three energy-saver modes: the Low Power Mode, the Transit Mode, and the Night/Off Mode.

  • Page 275: Aof

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Mode and Night/Off Mode. Actual power consumption (during the Operating Mode) depends on job status and environmental conditions. The SRAM is alive and backs up the engine controller. See "" in the section of "Energy Saver Modes of Basic Machines". Timers The Energy Saver Timer and Auto Off Timer start at the same time (t0) when the machine ends all jobs, when the user ends all manual operations, or when the controller starts the...

  • Page 276: Specifications

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Specifications General Specifications Configuration: Desktop Copy Process: Dry electrostatic transfer system Originals: Sheet/Book/Object Original Size: Maximum A3/11" x 17" Maximum: A3/11" x 17" A5 LEF/8 " x 5 " (Paper tray), Minimum: A6 SEF/5 " x 8 "...
  • Page 277 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Europe, Asia: 220 – 240 V, 50/60 Hz, 7 A Full System: Not above 1.28 kW Off Mode (GDI): Not above 10 W Off Mode (Basic): Not above 1 W Power Consumption: Full system - Maximum possible power consumption (any combination of mainframe and options), excluding optional heaters, key counter, fax unit, and printer controller.
  • Page 278 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Mode B245 B276 B277 1-sided A3 SEF/11" 17" — — Memory copy A4 LEF/11" x 8 " — — 2-sided Measurement Conditions: Figures are for one-sided original to one-sided copy except where stated otherwise Not APS mode 100% size Basic model: Less than 10 seconds (at 20C [68F]) Warm-up Time:...
  • Page 279 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 10 envelopes Copy weight: 80 g/m (20 lb.) Toner Replenishment: Cartridge replacement (260 g/cartridge) Platen cover Auto document feeder Auto-reverse document feeder (B269/B277 only) Paper tray unit (1 tray) Optional Equipment: Paper tray unit (2 trays) 1-bin tray (B269/B277 only) Tray heater (B269/B277 only) Optics anti-condensation heater...

  • Page 280: Supported Paper Sizes

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Supported Paper Sizes Original Size Detection North America, Europe, Asia, Taiwan North America Europe/Asia/Taiwan Paper Size (W x L) Platen Platen A3 SEF 297 x 420 mm B4 SEF 257 x 364 mm A4 SEF 210 x 297 mm A4/LT A4/LT A4 LEF...
  • Page 281 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Key: Detected Not detected Detected as F (8 " x 13") Detected as specified A4/LT: Detected as A4 or LT as specified When the settings of SP 4305 1 is "1: A4/LT," the settings of SP 4303 is invalidated (A5 LEF is not detected).

  • Page 282: Paper Feed And Exit

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 China/Korea China/Korea (localized) Paper Size (W x L) Platen Platen Foolscap SEF " x 13" Folio SEF " x 13" USB4 SEF 10" x 14" Eng Quarto SEF 8" x 10" Eng Quarto LEF 10" x 8" Key: Detected Not detected...
  • Page 283 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Main frame tray Size Paper Duplex China/ North Asia/ (W x L) Europe Korea America Taiwan A6 SEF 105 x 148 mm A6 LEF 148 x 105 mm DLT SEF 11" x 17" DLT LEF 17" x 11" LG SEF "...
  • Page 284 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Detected (Main frame tray)/Processed (Duplex) Not detected (Main frame tray)/Not processed (Duplex) Selected manually Specified from the key pad Custom W: 90 to 297 mm L: 148 to 600 mm...

  • Page 285: Machine Configuration

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Machine Configuration...
  • Page 286 B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Unit/Component Machine Code Diagram Copier (1-tray non-duplex model) B245/B268/B276 Copier (2-tray with duplex) B269/B277 [C] + [G] Platen cover (optional) B406 ADF (optional) B813 Copier ARDF (optional) B814 Paper tray unit–1 tray (optional) B385 Paper tray unit–2 trays (optional) B384 1-bin tray (optional) B621...

  • Page 287: Optional Equipment

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Optional Equipment ARDF Standard sizes Single-sided mode: A3 to A5, 11" x 17" to " x 8 " Double-sided mode: A3 to A5, 11" x 17" to " x 8 " Original Size: Non-standard sizes (Single-sided mode only) Max.

  • Page 288: One-Tray Paper Tray Unit

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Max. length 1,260 mm Min. length 128 mm Original Weight: 52 – 105 g/m (14 – 28 lb) Table Capacity: 30 sheets (80 g/m , 22 lb) Original Standard Position: Center Separation: Original Transport: Roller transport Original Feed Order: From the top original Reproduction Range:...

  • Page 289: Two-Tray Paper Tray Unit

    B245/B276/B277/B268/B269 Service Manual 18-Jan-06 Two-Tray Paper Tray Unit Paper Size A5 to A3, 5 " x 8 " SEF to 11" x 17" Paper Weight: 60 – 105 g/m , 16 – 28 lb Tray Capacity: 500 sheets (80 g/m , 20 lb) x 2 trays Paper Feed System: Feed roller and friction pad...

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