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Ricoh LDD280 User Manual

Ricoh LDD280
459 pages
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LDD280 (C262)/LDD250 (C265)
SERVICE MANUAL
002648MIU (rev. 05/31/06)

Table of Contents

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Ricoh LDD280 Specifications

General IconGeneral
Print TechnologyLaser
FunctionsPrint, Copy, Scan, Fax
Maximum Resolution1200 x 1200 dpi
Duplex PrintingYes
Maximum Paper SizeA4
Scan Resolution600 x 600 dpi
Copy Resolution600 x 600 dpi
Fax TypeSuper G3
Fax Transmission Speed33.6 kbps
Print Speed (Black)28 ppm
Paper Capacity250 sheets
ConnectivityUSB, Ethernet
Scan TypeFlatbed, ADF
Copy Speed (Black)28 cpm
Operating System CompatibilityWindows, Mac

Summary

1. INSTALLATION

1.2 INSTALLATION PROCEDURE

Step-by-step guide for installing the machine and its components.

1.1.3 POWER CONNECTION

Guidelines for safely connecting the machine to a power source.

2. PREVENTIVE MAINTENANCE

3. REPLACEMENT AND ADJUSTMENT

3.1 GENERAL CAUTION

Important safety precautions before performing maintenance or replacement.

3.3 SCANNER UNIT

Details on scanner components, sensors, and calibration.

3.3.6 SBU (SENSOR BOARD UNIT) CALIBRATION

Procedure for performing SBU auto calibration after component replacement.

3.4 COPY IMAGE ADJUSTMENT

Procedures for aligning print image quality and registration.

3.4.1 LEADING EDGE REGISTRATION ADJUSTMENT

Adjusting the image's leading edge position for platen and ADF modes.

3.4.2 SIDE-TO-SIDE REGISTRATION ADJUSTMENT

Adjusting the image's side-to-side position for platen and ADF modes.

3.4.3 VERTICAL MAGNIFICATION ADJUSTMENT

Adjusting vertical magnification by changing the master writing speed.

3.5.5 ECU AND I/O REPLACEMENT, NVRAMS

Steps for replacing ECU, I/O board, and NVRAMs, with required adjustments.

3.6 MASTER EJECT SECTION

Maintenance and adjustment of the master ejection mechanism.

3.6.5 MASTER EJECT SENSOR ADJUSTMENT

Procedure for adjusting the master eject sensor voltage.

3.7 MASTER FEED SECTION

Procedures for servicing the master feeding and making components.

3.7.14 PLATEN RELEASE CAM ADJUSTMENT

Procedure for adjusting the platen release cam position.

3.7.15 THERMAL HEAD VOLTAGE ADJUSTMENT

Procedure for adjusting the thermal head voltage for optimal performance.

3.7.16 MASTER END SENSOR ADJUSTMENT

Procedure for adjusting the master end sensor voltage.

3.7.17 MASTER EDGE SENSOR ADJUSTMENT

Procedure for adjusting the master edge sensor voltage.

3.7.18 MASTER SET SENSOR ADJUSTMENT

Procedure for adjusting the master set sensor voltage.

3.7.19 THERMAL HEAD ALIGNMENT ADJUSTMENT

Procedure for aligning the thermal head to correct image skew.

3.7.20 MASTER MAKING UNIT PARALLEL ADJUSTMENT

Procedure for ensuring the master is wrapped parallel to the drum.

3.7.21 MASTER EDGE TRIMMING PROCEDURE

Procedure to trim the leading edge of the master roll evenly.

3.8 DRUM SECTION

Details on drum unit maintenance, ink supply, and sensors.

3.8.6 INK ROLLER GAP ADJUSTMENT

Procedure for adjusting the ink roller gap for proper ink spread.

3.8.7 INK DETECTION

Procedure for adjusting the ink detection pulse for accurate ink end detection.

Ink Detection Adjustment

Procedure for ink detection adjustment using an oscilloscope.

3.8.8 DRUM POSITION ADJUSTMENT

Procedure to adjust the drum position for proper paper alignment.

3.8.9 1ST DRUM MASTER SENSOR ADJUSTMENT

Procedure for adjusting the 1st drum master sensor voltage.

3.8.10 2ND DRUM MASTER SENSOR ADJUSTMENT

Procedure for adjusting the 2nd drum master sensor voltage.

3.9 PAPER FEED SECTION

Procedures for adjusting and maintaining paper feed components.

3.9.2 PICK-UP ROLLER, PAPER FEED ROLLER

Steps for installing pick-up and paper feed rollers, including one-way clutch.

3.9.9 FRICTION PADS

Procedure for identifying, installing, and resetting PM counters for friction pads.

3.9.13 REGISTRATION ROLLER LIFTING CAM POSITION ADJUSTMENT

Procedure for adjusting the registration roller lifting cam position for smooth paper feed.

3.9.14 DOUBLE FEED SENSOR ADJUSTMENT

Procedure for adjusting the double feed sensor using LEDs and VRs.

3.9.15 TIMING BELT TENSION ADJUSTMENT FOR THE PAPER FEED MOTOR

Procedure for adjusting the timing belt tension for the paper feed motor.

3.9.16 TIMING BELT TENSION ADJUSTMENT FOR THE REGISTRATION MOTOR

Procedure for adjusting the timing belt tension for the registration motor.

3.9.17 PAPER FEED AND SEPARATION PRESSURE ADJUSTMENT MECHANISM

Adjustment of paper feed and separation pressures based on paper type and occurrence.

Paper Feed Motor Stop Timing Adjustment

Adjusting the paper feed motor stop timing for proper paper reach.

Paper Clamping Timing Adjustment

Adjusting paper clamping timing for proper paper engagement on the pressure cylinder.

3.10 PRINTING SECTION

Maintenance and adjustment of printing components like pressure cylinder.

3.10.1 PRESSURE CYLINDER, PAPER CLAMPER

Removal procedure for the pressure cylinder and paper clamper.

Removal procedure

Cautionary notes and steps for removing the pressure cylinder.

Reinstallation procedure

Installing the pressure cylinder, aligning bearing, and securing it.

3.10.3 1ST DRUM MASTER SENSOR

Procedure for removing, installing, and adjusting the 1st drum master sensor guide.

3.10.4 1ST DRUM MASTER SENSOR GUIDE ADJUSTMENT

Procedure for adjusting the 1st drum master sensor guide clearance.

3.10.6 PRINTING PRESSURE ADJUSTMENT

Procedure for adjusting printing pressure bracket and clearance.

3.10.7 PRINTING PRESSURE RELEASE ARM GAP ADJUSTMENT

Procedure for adjusting the gap in the printing pressure release arm.

3.11 MAIN DRIVE AND IMAGE UP/DOWN SHIFTING DRIVE SECTION

Procedures for servicing main drive and image shifting mechanisms.

3.11.1 MAIN MOTOR AND TORQUE LIMITER

Removal procedure for main motor control board and wire protection cover.

Reinstallation Procedure

Aligning bracket cutout with pawl, attaching spring, securing screw, installing gear, pulley bracket, and timing belt.

3.11.2 MAIN DRIVE MECHANISM (MAIN DRIVE TIMING BELT)

Procedures for disassembling and reassembling the main drive timing belt mechanism.

Reassembly Procedure

Items to check and set during main drive section reassembly.

Install the main drive unit on the machine rear frame

Setting image shift arm, pushing image up/down shift unit, installing timing belt, and removing positioning shaft.

Fine adjustment using the special tools

Securing pressure cylinder drive gear and printing pressure cam drive gear.

Finishing

Installing registration roller lifting cam, brackets, exit pawl, and adjusting gaps.

Copy Image Check Procedure after Main Drive and Image Up/Down Shifting Drive Section Re-assembly

Procedures to check and correct image position issues after reassembly.

3.11.4 PRESSURE CYLINDER ROTATION KNOB ADJUSTMENT

Procedure for adjusting the pressure cylinder rotation knob.

3.11.5 SCISSORS GEAR POSITION ADJUSTMENT

Procedure for adjusting scissors gear position to ensure paper registration.

3.11.6 IMAGE UP/DOWN SHIFT WORM-GEAR POSITION ADJUSTMENT

Procedure for adjusting the image up/down shift worm-gear position.

3.11.7 IMAGE UP/DOWN SHIFT DRIVE UNIT POSITION ADJUSTMENT

Procedure for adjusting image up/down shift drive unit position to remove play.

3.11.8 IMAGE SHIFT GEAR PRESSURE ADJUSTMENT

Procedure for adjusting image shift gear pressure to ensure smooth movement.

3.12 PAPER DELIVERY SECTION

Maintenance and adjustment of paper delivery components and jam detection.

3.12.5 GAP ADJUSTMENT BETWEEN PAPER PICK-OFF PLATE AND PRESSURE CYLINDER

Procedure for adjusting the gap between the paper pick-off plate and pressure cylinder.

3.12.6 PAPER EXIT PAWL DRIVE TIMING ADJUSTMENT

Procedure for adjusting paper exit pawl drive timing after motor replacement.

3.12.7 GAP ADJUSTMENT BETWEEN EXIT PAWL AND DRUM

Procedure for adjusting the gap between the exit pawl and the drum.

4. TROUBLESHOOTING

4.1 SERVICE CALL CODES

List of error codes and their meanings for diagnosing machine issues.

4.3 SERVICE CALL CODE TABLE

Detailed table of error codes, conditions, and possible causes.

4.4 ELECTRICAL COMPONENT DEFECTS

Troubleshooting guide for component failures and symptoms.

5. SERVICE TABLES

IMPORTANT SAFETY NOTICES

PREVENTION OF PHYSICAL INJURY

Precautions to prevent personal injury during machine operation and servicing.

OBSERVANCE OF ELECTRICAL SAFETY STANDARDS

Standards for installation and maintenance by trained personnel.

SPECIFICATIONS

1.2 INSTALLATION PROCEDURE

1.2.5 EXTENSION HDD TYPE 1 (OPTION)

Accessory check and procedure for installing an extension HDD.

1.2.6 POSTSCRIPT3 BOARD TYPE 2 (OPTION)

Accessory check and detailed steps for inserting DIMMs into the controller board.

Installation Procedure

Installing the PS3 module into the designated slot and verifying the installation.

1.2.7 IEEE 802.11B I/F UNIT TYPE 1 (OPTION)

Accessory check and procedure for installing the wireless LAN board.

1.2.8 IEEE 1284 PARALLEL BOARD TYPE 1 (OPTION)

Accessory check and procedure for installing the parallel interface board.

1.2.9 MEMORY UNIT TYPE C (128MB/256MB) (OPTION)

Accessory check and procedure for installing memory units.

REPLACEMENT AND ADJUSTMENT

5. SERVICE TABLES

5.2 SPECIAL TOOLS

List of specialized tools required for machine service.

5.3 TOUCH PANEL POSITION ADJUSTMENT

Procedure for calibrating the touch panel display for accurate input.

5.4 SERVICE PROGRAM MODE

Guide to accessing and using the machine's service program modes.

5.4.1 ENABLING AND DISABLING SERVICE PROGRAM MODE

Guide on how to enter and exit the service program mode.

5.4.3 SERVICE PROGRAM TABLE

Table listing available service program menus and their functions.

2. Basic Settings

Procedures for excess ink removal and color ink detection settings.

3. System Settings

Settings for installation details, unit configuration, and paper feed systems.

4. Input Test Mode

Input test menus for document feeder unit and LCIT/LCOT options.

5. Output Test Mode

Output test menus for drum rotation, clamper, image shift, idling roller, and around the drum sections.

6. System Adjustment

Settings for filter corrections and manual adjustments for master writing speed.

4: 6-1-7 (Master writing speed)

Adjusting master feed motor speed and calculating necessary adjustments.

6: 6-3-1 (Drum master clamper registration)

Adjusting master clamping position relative to the leading edge.

7: 6-4-7 (List of Sensor Adjustments)

Adjusting boundary conditions for various sensors using SP mode.

9: 6-9 (Misfeed – Paper Feed Pressure)

Adjusting paper feed pressure based on paper type and misfeed frequency.

10: 6-10 (Double Feed – Separation Press)

Adjusting paper separation pressure based on paper type and double feed frequency.

15: 6-14~6-15 (1st Paper Feed Delay – Normal/Thick)

Adjusting paper feed motor timing for different print speeds.

16: 6-16~6-17 (1st Paper Feed Pulse - Normal/Thick)

Improving paper separation by adjusting paper feed roller speed.

17: 6-20~6-24 (Registration Roller Delay)

Adjusting registration motor timing for different print speeds.

18: 6-27~6-29 (Paper Clamp Timing Pulse)

Adjusting paper feed amount into the paper clamper.

19: 6-30 (Paper Feed Jam Check Pulse)

Adjusting time from paper feed start to jam detection.

20: 6-31-2 (Feed Stop Timing Pulse)

Adjusting paper buckle amount at the registration roller.

21: 6-31-8 (Feed Slow Down Timing)

Adjusting time to decrease paper speed for paper buckle.

22: 6-34 (Registration Roller Speed)

Adjusting registration roller speed based on paper type for accurate registration.

7. Memory Data Clear

Procedures for clearing memory data like factory settings, user settings, and logs.

8. System Test

Performing system tests such as data printout and component checks.

9. Printer Controller

Functions related to printer control, including output data print and mode clearing.

5.5 FIRMWARE UPDATE

Overview of firmware update process using SD cards for different machine components.

5.5.2 PREPARING TO DOWNLOAD FIRMWARE

Steps for creating folders and transferring firmware files to an SD card.

5.5.3 DOWNLOADING THE FIRMWARE TO THE MACHINE

Procedure for turning off power, inserting SD card, and turning power back on.

Downloading Firmware

Notes on firmware download status, error handling, and SD card removal.

5.5.4 ERRORS DURING FIRMWARE UPDATE

Table of error messages and their solutions during firmware update.

5.6 SP MODE SETTINGS AFTER REPLACING AN NVRAM

Procedures for reconfiguring settings after NVRAM replacement.

5.6.1 NVRAM FOR THE ACU

SP modes required after replacing the ACU NVRAM for settings reset.

5.6.2 NVRAM FOR THE ECU

SP modes required after replacing the ECU NVRAM for factory settings.

6. DETAILED SECTION DESCRIPTIONS

6.2 SCANNER AND OPTICS

Detailed description of the scanner's optical system and operation.

6.2.3 ORIGINAL SIZE DETECTION IN PLATEN MODE

Table showing sensor output for different original sizes and combinations.

6.2.4 AUTO BACKGROUND CORRECTION

Explanation of auto background correction for platen and ADF modes.

6.3 IMAGE PROCESSING

Explanation of image processing steps like shading, filtering, and binary conversion.

6.3.2 AUTO SHADING

Explanation of black level and white level correction methods for auto shading.

6.4 THERMAL HEAD

Specifications and handling precautions for the thermal head.

6.12 SECURITY MODE

Features for protecting originals and preventing unauthorized removal of components.

6.14 ERROR DETECTION

Detection methods for various machine errors and jams.

6.14.7 MASTER EJECT ERROR DETECTION

Detection of master pick-up errors and master eject/compression errors using timing charts.

6.14.8 ERROR DETECTION DURING MASTER MAKING

Detection of master set/feed errors and master cut errors using timing charts and sensors.

Master Cut Error

Timing chart for master cut error detection and recovery operations.

Error During Clamping the Master to the Drum

Detection of master clamping errors using drum position sensors.

6.14.9 ORIGINAL FEED ERROR DETECTION IN THE ADF

Detection of original feed errors in the ADF, including feed-in and feed-out jams.

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