Ricoh SPC420DN Service Manual (product code G190)


Accurate, clear and concise text, combined with detailed illustrations, lists of error code, instruction and diagrams, guide you through procedure of repair, remediate, maintenance and adjustments your copier, printer or scanner.
Present service manual Ricoh SPC420DN (product code G190) contain clear instructions and procedures on how to fix the problems occurring in your equipment.
The information contained in this repair manual is necessary for the repair, but also prevention, resulting in a longer life of your equipment.
Format of the manual: PDF, makes it easy to navigate, instant download and print. English language.
To see what contain, please read table of contents:

INSTALLATION
1. INSTALLATION PROCEDURE
1.1 INSTALLATION REQUIREMENTS
1.1.1 ENVIRONMENT
1.1.2 MACHINE LEVEL
1.1.3 MACHINE SPACE REQUIREMENTS
1.1.4 POWER REQUIREMENTS
1.2 OPTIONAL UNIT COMBINATIONS
1.2.1 MACHINE OPTIONS
1.2.2 CONTROLLER OPTIONS
PRINTER INSTALLATION
1.2.3 INSTALLATION PROCEDURE
Unpacking
Installing the toner
Loading Paper
Turning Power on
Selecting the Panel Display Language
Printing the Test Page
Settings Relevant to the Service Contract
1.2.4 METER CLICK CHARGE
1.2.5 MOVING THE MACHINE
1.2.6 TRANSPORTING THE MACHINE
1.3 OPTIONS INSTALLATION
1.3.1 PAPER FEED UNIT
1.3.2 TRAY HEATER
1.4 CONTROLLER OPTIONS
1.4.1 OVERVIEW
I/F Card Slots
SD Card Slots
1.4.2 SD CARD APPLI MOVE
Overview
Move Exec
Undo Exec
Storing the SD Card

PREVENTIVE MAINTENANCE
2. PREVENTIVE MAINTENANCE
2.1 USER REPLACEABLE ITEMS
2.2 SERVICE MAINTENANCE
2.2.1 RECOMMENDED CLEANING PROCEDURE

REPLACEMENT AND ADJUSTMENT
3. REPLACEMENT AND ADJUSTMENT
3.1 BEFORE YOU START
3.2 SPECIAL TOOLS AND LUBRICANTS
3.2.1 TOOLS
3.3 ELECTRICAL COMPONENTS
3.3.1 ELECTRICAL BOARD UNIT
3.3.2 IOB (INPUT/OUTPUT BOARD)
3.3.3 CONTROLLER BOARD
3.3.4 INSTALLING THE NEW NVRAM
3.3.5 PSU (POWER SUPPLY UNIT) BOARD
3.3.6 HIGH VOLTAGE POWER SUPPLY BOARD 1
3.3.7 EGB (ENGINE BOARD) AND HIGH VOLTAGE POWER SUPPLY BOARD 2
3.3.8 LCD PANEL
3.3.9 NVRAM REPLACEMENT PROCEDURE
NVRAM on the EGB (Engine Board)
NVRAM on the Controller
NVRAMs on the EGB and Controller
3.4 LASER OPTICS
3.4.1 CAUTION DECAL LOCATIONS
3.4.2 LD UNIT
Replacement
Color Registration Adjustment
3.4.3 LDB
3.4.4 POLYGON MIRROR MOTOR
3.4.5 LASER SYNCHRONIZING DETECTOR BOARDS
3.4.6 LDU SHUTTER MOTOR UNIT AND SENSOR
3.5 PAPER FEED
3.5.1 PAPER FEED ROLLER
3.5.2 PAPER FRICTION PAD
3.5.3 BY-PASS PAPER SIZE SENSOR
3.5.4 BY-PASS FEED ROLLER, FRICTION PAD
Reassembling the by-pass friction pad
3.5.5 REGISTRATION SENSOR
3.5.6 PAPER VOLUME SENSOR, END SENSOR AND PAPER WIDTH SENSOR
3.5.7 PAPER SIZE SENSOR AND TEMPERATURE/ HUMIDITY SENSOR
3.5.8 PAPER FEED MOTOR
3.5.9 PAPER REGISTRATION CLUTCH, PAPER FEED CLUTCH AND BY-PASS CLUTCH
3.6 DEVELOPMENT
3.6.1 COLOR DEVELOPMENT MOTOR, COLOR OPC MOTOR AND BLACK OPC/DEVELOPMENT MOTOR
3.6.2 DEVELOPMENT CLUTCH
3.6.3 TRANSFER BELT CONTACT MOTOR
3.6.4 TONER SUPPLY MOTOR
3.6.5 TRANSFER ROLLER CONTACT MOTOR
3.6.6 ID SENSORS
3.7 DRIVE
3.7.1 DRIVE UNIT
3.8 DUPLEX
3.8.1 DUPLEX JAM SENSOR
3.8.2 INVERTER SENSOR
3.8.3 DUPLEX MOTOR AND INVERTER MOTOR
3.9 FUSING
3.9.1 FUSING UNIT
3.9.2 THERMISTOR AND THERMOSTAT
3.9.3 FUSING LAMP
3.9.4 FUSING EXIT SENSOR AND PAPER EXIT SENSOR
3.9.5 FUSING REGISTRATION SENSOR
3.9.6 FAN DIRECTION
3.10 ADJUSTMENTS
3.10.1 GAMMA ADJUSTMENT
Summary
Adjustment Procedure

TROUBLESHOOTING
4. TROUBLESHOOTING
4.1 PROCESS CONTROL RESULTS
4.2 SERVICE CALL CONDITIONS
4.2.1 SUMMARY
4.2.2 SC CODE DESCRIPTIONS
Engine SC
Controller Error
4.3 TROUBLESHOOTING GUIDE
4.3.1 BLANK PRINT
4.3.2 ALL-BLACK PRINT
4.3.3 MISSING CMY COLOR
4.3.4 LIGHT PRINT
4.3.5 REPEATED SPOTS OR LINES ON PRINTS
4.3.6 DARK VERTICAL LINE ON PRINTS
4.3.7 WHITE HORIZONTAL LINES OR BANDS
4.3.8 MISSING PARTS OF IMAGES
4.3.9 DIRTY BACKGROUND
4.3.10 PARTIAL CMY COLOR DOTS
4.3.11 DARK IRREGULAR STREAKS ON PRINTS
4.3.12 CMY COLOR IRREGULAR STREAKS
4.3.13 GHOSTING
4.3.14 UNFUSED OR PARTIALLY FUSED PRINTS
4.3.15 IMAGE SKEW
4.3.16 BACKGROUND STAIN
4.3.17 NO PRINTING ON PAPER EDGE
4.3.18 IMAGE NOT CENTERED WHEN IT SHOULD BE
4.4 ELECTRICAL COMPONENT DEFECTS
4.4.1 SENSORS
4.5 BLOWN FUSE CONDITIONS
4.5.1 POWER SUPPLY UNIT
4.5.2 IOB
4.6 LEDS
SERVICE TABLES
5. SERVICE TABLES
5.1 SERVICE PROGRAM MODE
5.1.1 SERVICE MODE OPERATION
Entering the Service Mode
Accessing the Required Program
Inputting a Value or Setting for a Service Program
Exiting Service Mode
5.1.2 REMARKS
Display on the Control Panel Screen
5.1.3 BIT SWITCH PROGRAMMING
5.2 SERVICE MODE TABLE
5.2.1 CONTROLLER SERVICE MODE
5.2.2 ENGINE SERVICE MODE
SP1-XXX (Feed)
SP2-XXX (Drum)
SP3-XXX (Process)
SP5-XXX (Mode)
SP7-XXX (Data Log)
SP8-XXX (Data Log 2)
SP9-XXX
5.2.3 INPUT CHECK TABLE
5.2.4 OUTPUT CHECK TABLE
5.3 FIRMWARE UPDATE
5.3.1 TYPE OF FIRMWARE
5.3.2 BEFORE YOU BEGIN
5.3.3 UPDATING FIRMWARE
File Arrangement
Update Procedure
Error Handling
Power Failure
5.3.4 NVRAM DATA UPLOAD/DOWNLOAD
Uploading NVRAM Data
Downloading NVRAM Data
5.3.5 ADDRESS BOOK UPLOAD/DOWNLOAD
Download
Upload
5.3.6 HANDLING FIRMWARE UPDATE ERRORS
Error Message Table
5.4 CONTROLLER SELF-DIAGNOSTICS
5.4.1 OVERVIEW
5.5 USING THE DEBUG LOG
5.5.1 SWITCHING ON AND SETTING UP SAVE DEBUG LOG
5.5.2 RETRIEVING THE DEBUG LOG FROM THE HDD
5.5.3 DEBUG LOG CODES
SP5857-015 Copy SD Card-to-SD Card: Any Desired Key
SP5857-016 Create a File on HDD to Store a Log
SP5857-017 Create a File on SD Card to Store a Log
5.6 DIP SWITCHES
5.6.1 CONTROLLER BOARD

DETAILED DESCRIPTIONS
6. DETAILED DESCRIPTIONS
6.1 OVERVIEW
6.1.1 COMPONENT LAYOUT
6.1.2 PAPER PATH
6.1.3 DRIVE LAYOUT
6.1.4 BOARD STRUCTURE
6.1.5 PRINTING PROCESS
6.2 PROCESS CONTROL
6.2.1 OVERVIEW
6.2.2 POTENTIAL CONTROL
Overview
Process Control Self-check
Process Control Self-Check Procedure
6.2.3 TONER SUPPLY CONTROL
Toner Supply Control Modes
Low Image Coverage
6.2.4 TONER NEAR END/TONER END DETECTION
Introduction
Toner Near End Detection
Toner End Detection
Toner End Recovery
6.2.5 DEVELOPER INITIALIZATION
6.3 PAPER FEED
6.3.1 OVERVIEW
6.3.2 PAPER FEED DRIVE
6.3.3 PAPER TRAY
Paper Lift
Paper Size Detection
Paper Near End/End Detection
6.3.4 BY-PASS TRAY FEED AND SIZE DETECTION
Paper Feed Mechanism
Paper Size Detection Mechanism
6.3.5 DUPLEX
Drive
Interleaving
6.4 LASER EXPOSURE
6.4.1 OVERVIEW
6.4.2 OPTICAL PATH
6.4.3 LASER SYNCHRONIZING DETECTOR
Overview
Main Scan Start Detection
6.4.4 LD SAFETY SWITCH
6.4.5 AUTOMATIC LINE POSITION ADJUSTMENT
Overview
Summary of Each Adjustment
Adjustment Conditions
Main Scan Skew Adjustment
LDU Shutter
6.5 PHOTOCONDUCTOR UNIT
6.5.1 OVERVIEW
6.5.2 DRIVE AND DRIVE GEAR POSITION SENSOR
Mechanism
Initialization Process and SC Codes
6.5.3 DRUM CHARGE AND QUENCHING
6.5.4 DRUM CLEANING
6.5.5 WASTE TONER COLLECTION
6.5.6 WASTE TONER BOTTLE FULL DETECTION AND SET
DETECTION
6.5.7 PCU DETECTION (DEVELOPMENT UNIT DETECTION)
Unit Set Detection Pins
New Unit Detection
Error Message
6.6 DEVELOPMENT
6.6.1 OVERVIEW
6.6.2 DRIVE
6.6.3 DEVELOPER MIXING
6.6.4 DEVELOPMENT BIAS
6.6.5 TONER SUPPLY MECHANISM
Overview
6.7 IMAGE TRANSFER
6.7.1 OVERVIEW
6.7.2 TRANSFER UNIT DETECTION AND NEW UNIT DETECTION6-48
6.7.3 DRIVE AND TRANSFER BELT ROLLER VOLTAGE
Transfer belt contact
Transfer Belt Cleaning
6.7.4 TRANSFER ROLLER UNIT
Discharge
Transfer Roller Contact
6.8 FUSING
6.8.1 OVERVIEW
6.8.2 FUSING TEMPERATURE CONTROL
Overall Procedure
Fusing Roller Idling
Idling Ready Temperature before First Print Job: [A]
Machine Ready Temperature: [B]
Print ready temperature: [C]
Target Printing Temperature: [D]
First Print Temperature: [G]
Corrections for Small Paper Sizes (less than A5)
Overheat Protection
6.8.3 DRIVE
6.9 CONTROLLER
SPECIFICATIONS
7. SPECIFICATIONS
7.1 SPECIFICATIONS
7.1.1 GENERAL SPECIFICATIONS
7.1.2 SUPPORTED PAPER SIZES
7.1.3 SOFTWARE ACCESSORIES
Printer Drivers
Utility Software
7.1.4 MACHINE CONFIGURATION

Number of pages: 503.