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Ricoh U-C1 B051 User Manual

Ricoh U-C1 B051
343 pages
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MODEL U-C1
(Machine Code: B051/B052)
SERVICE MANUAL

Table of Contents

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Ricoh U-C1 B051 Specifications

General IconGeneral
Product TypeAll-in-One Printer
FunctionsPrint, Copy, Scan
Print TechnologyInkjet
Scanner TypeFlatbed
Copy ResolutionUp to 600 x 600 dpi
Paper Capacity100 sheets
Media TypesPlain Paper, Photo Paper, Envelopes
ConnectivityUSB 2.0
Operating System CompatibilityWindows

Summary

IMPORTANT SAFETY NOTICES

PREVENTION OF PHYSICAL INJURY

Precautions to prevent physical harm during copier operation and maintenance.

OBSERVANCE OF ELECTRICAL SAFETY STANDARDS

Guidelines for safe electrical installation and maintenance of the copier.

LASER SAFETY

LASER UNIT REPAIR RESTRICTIONS

Prohibits field repair of laser optical units; directs return to factory for repair.

1. INSTALLATION

1.1 INSTALLATION REQUIREMENTS

Specifies environmental, electrical, and space requirements for machine installation.

1.2 COPIER (B051/B052)

Details on copier installation, including power sockets for peripherals.

6. DETAILED SECTION DESCRIPTIONS

6.3 COPY PROCESS

Explains the step-by-step process of how a copy is made.

6.4 PROCESS CONTROL

Describes the parameters and steps involved in process control for image quality.

6.5 SCANNING

Details the scanning system, including drive mechanisms and size detection.

6.6 IMAGE PROCESSING

Explains image processing steps like shading, color correction, and filtering.

2. PREVENTIVE MAINTENANCE

2.1 MAIN UNIT

Overview of preventive maintenance for the main unit.

2.1.2 PM TABLE

Table outlining preventive maintenance tasks for various components based on print counts.

3. REPLACEMENT AND ADJUSTMENT

3.4 LASER UNIT

3.4.2 LASER UNIT REPLACEMENT

Step-by-step procedure for replacing the laser unit.

Adjusting for Image Skew

Procedure to adjust the image skew by repositioning the laser optics housing.

D-Phase Adjustment

Corrects density differences between the left and right sides of the paper.

Laser Beam Pitch Adjustment

Adjusts laser beam pitch to eliminate vertical black stripes.

3.5 DEVELOPMENT UNIT

REPLACING UNITS

Guide for replacing development units, including starter toner cartridge information.

3.6 PHOTOCONDUCTOR UNIT (PCU)

3.6.1 PCU ASSEMBLY

Procedure for removing and handling the Photoconductor Unit (PCU) assembly.

3.8 FUSING/PAPER EXIT

3.8.1 FUSING UNIT

Procedure for removing and replacing the fusing unit.

3.9 PAPER FEED AND TRANSPORT

3.12 COPY ADJUSTMENT

3.12.1 PRINTING

Adjustments for print registration, including leading edge and side-to-side.

3.12.2 SCANNING

Scanner Sub-Scan Magnification

Adjusts the magnification in the sub-scan direction.

Scanner Leading Edge and Side-to-Side Registration

Adjusts scanner registration for platen mode.

3.13 COLOR ADJUSTMENT

3.13.1 AUTO COLOR CALIBRATION (ACC)

Automatic calibration of printer gamma curve for color accuracy.

3.13.2 PRINTER GAMMA CORRECTION

Fine-tuning printer gamma curves for optimal print output.

3.14 SCANNER WHITE LEVEL ADJUSTMENT

White Level Adjustment

Adjusts scanner white level when it is not correct.

4. TROUBLESHOOTING

4.1 SERVICE CALL

Conditions and reset procedures for service call errors.

4.1.2 SC TABLE

List of service call codes, symptoms, and possible causes.

4.4 ELECTRICAL COMPONENT DEFECTS

4.4.1 SENSORS

Lists common sensor defects, their conditions, and symptoms.

5. SERVICE TABLES

5.1 SERVICE PROGRAM MODE

Overview of the Service Program mode and its operation.

5.1.1 SERVICE PROGRAM MODE OPERATION

Steps for entering and exiting the Service Program mode.

5.1.2 SP MODE TABLE

SP1-XXX: (Feed)

SP table for feed adjustments, including lead edge and side-to-side registration.

SP5-XXX: (Mode)

401* Access Control

Enables/disables user code, key counter, and coin lock for various modes.

5.1.4 INPUT CHECK

Main Machine Input Check (SP5-803)

Checks the status of various sensors and switches in the main machine.

5.1.5 OUTPUT CHECK

Main Machine Output Check (SP5-804)

Tests the operation of main machine components like motors and clutches.

5.2 PROGRAM DOWNLOAD

5.2.1 FIRMWARE

Procedure for downloading firmware modules to the machine.

5.2.2 NVRAM DATA UPLOAD/DOWNLOAD

Procedure for backing up and restoring NVRAM data using a flash memory card.

5.4 SYSTEM SETTINGS AND COPY SETTING RESET

5.4.1 SYSTEM SETTING RESET

Resets system settings to their factory defaults.

5.4.2 COPIER SETTING RESET

Resets copier settings to their factory defaults.

6.4 PROCESS CONTROL

6.4.2 PROCESS CONTROL STEPS

Details the six steps involved in process control.

6.6 IMAGE PROCESSING

Black Level Correction

Improves image reproduction for high-density areas.

6.6.3 IMAGE PROCESSING

Shading Correction

Compensates for light emission level differences in scanned images.

Picture Element (Dot Position) Correction

Corrects scan line and CCD perpendicularity for accurate dot positioning.

Scan Line Correction

Synchronizes RGB signals by storing lines in memory.

6.7 PHOTOCONDUCTOR UNIT (PCU)

6.7.2 CHARGE CORONA UNIT

Details the power supply, grid, wire, and cleaning mechanism for the charge corona unit.

6.8 LASER EXPOSURE

6.8.5 LD SAFETY SWITCH

Safety switch mechanism to prevent laser emission when covers are open.

6.9 DEVELOPMENT

6.9.4 TONER END DETECTION

Explains methods for detecting toner end and near-end conditions.

6.10 PAPER FEED

6.11 PAPER TRANSFER AND SEPARATION

6.12 IMAGE FUSING AND PAPER EXIT

SPECIFICATIONS

1. GENERAL SPECIFICATIONS (MAIN UNIT)

Provides general specifications for the main unit, including configuration and paper sizes.

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