B121/B122/B123 SERVICE MANUAL. December 1st, 2003 Subject to change RICOH GROUP COMPANIES

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1 B121/B122/B123 SERVICE MANUAL RICOH GROUP COMPANIES December 1st, 2003 Subject to change

2 TABLE OF CONTENTS 1. INSTALLATION INSTALLATION REQUIREMENTS ENVIRONMENT MACHINE LEVEL MINIMUM SPACE REQUIREMENTS POWER REQUIREMENTS COPIER INSTALLATION POWER SOCKETS FOR PERIPHERALS ACCESSORY CHECK INSTALLATION PROCEDURE PLATEN COVER INSTALLATION ACCESSORY CHECK INSTALLATION PROCEDURE ARDF INSTALLATION ACCESSORY CHECK INSTALLATION PROCEDURE ADF INSTALLATION ACCESSORY CHECK INSTALLATION PROCEDURE TWO-TRAY PAPER TRAY UNIT INSTALLATION ACCESSORY CHECK INSTALLATION PROCEDURE ONE-TRAY PAPER TRAY UNIT INSTALLATION ACCESSORY CHECK INSTALLATION PROCEDURE ONE-BIN TRAY INSTALLATION ACCESSORY CHECK INSTALLATION PROCEDURE ANTI-CONDENSATION HEATER INSTALLATION TRAY HEATERS UPPER TRAY HEATER LOWER TRAY HEATER (TWO-TRAY MODEL ONLY) TRAY HEATERS FOR THE OPTIONAL PAPER FEED UNITS KEY COUNTER INSTALLATION MFP EXPANSION ACCESSORY CHECK INSTALLING EXPANSION COMPONENT Step 1 Controller Box Step 2 Printer/Scanner Step 3 PostScript Step 4 Fax Step 5 Reassembling INSTALLING PANELS AND KEYS Step 6 Panel Step 7 Printer/Scanner Keys i

3 Step 8 Fax Keys Step 9 Printer/Scanner and Fax Keys SETTINGS Step 10 MFP Settings and Time Settings Step 11 Fax Settings IEEE1284/IEEE1394 INTERFACE ACCESSORY CHECK INSTALLATION PROCEDURE UP Mode Settings for Wireless LAN SP Mode Settings for IEEE b Wireless LAN BLUETOOTH ACCESSORY CHECK INSTALLATION PROCEDURE PREVENTIVE MAINTENANCE PM TABLES Optics Drum Area Paper Feed Fusing Unit ADF/ARDF Paper Tray Unit HOW TO RESET THE PM COUNTER REPLACEMENT AND ADJUSTMENT GENERAL CAUTIONS PCU (PHOTOCONDUCTOR UNIT) TRANSFER ROLLER SCANNER UNIT LASER UNIT FUSING UNIT PAPER FEED IMPORTANT SPECIAL TOOLS AND LUBRICANTS EXTERIOR COVERS & OPERATION PANEL REAR COVER REAR LOWER COVER (TWO-TRAY MODELS ONLY) COPY TRAY UPPER COVERS LEFT COVER FRONT COVER FRONT RIGHT COVER RIGHT REAR COVER RIGHT DOOR (B121/B122)/DUPLEX UNIT (B123) BY-PASS TRAY LEFT LOWER COVER (TWO-TRAY MODELS ONLY) RIGHT LOWER COVER (TWO-TRAY MODELS ONLY) PLATEN COVER SENSOR ii

4 3.4 SCANNER UNIT EXPOSURE GLASS/DF EXPOSURE GLASS Exposure Glass DF Exposure Glass LENS BLOCK LAMP STABILIZER BOARD AND EXPOSURE LAMP ORIGINAL WIDTH/LENGTH SENSOR Sensor Positions Sensor Positions for China Model (8K/16K) SCANNER MOTOR SCANNER HOME POSITION SENSOR ADJUSTING SCANNER POSITIONS Overview Adjusting the First Scanner Contact Points Adjusting the Second Scanner Contact Points LASER UNIT LOCATION OF CAUTION DECAL TONER SHIELD GLASS LASER UNIT LD UNIT POLYGONAL MIRROR MOTOR LASER UNIT ALIGNMENT ADJUSTMENT PCU SECTION PCU PICK-OFF PAWLS AND TONER DENSITY SENSOR OPC DRUM CHARGE ROLLER AND CLEANING BRUSH CLEANING BLADE DEVELOPER AFTER REPLACEMENT OR ADJUSTMENT TONER SUPPLY MOTOR PAPER FEED SECTION PAPER FEED ROLLER FRICTION PAD PAPER END SENSOR EXIT SENSOR Non-duplex Models Duplex Models BY-PASS FEED ROLLER AND PAPER END SENSOR REGISTRATION ROLLER BY-PASS PAPER SIZE SWITCH REGISTRATION CLUTCH REGISTRATION SENSOR UPPER PAPER FEED CLUTCH AND BY-PASS FEED CLUTCH RELAY CLUTCH RELAY SENSOR LOWER PAPER FEED CLUTCH (TWO-TRAY MODELS ONLY) VERTICAL TRANSPORT SENSOR (TWO-TRAY MODELS ONLY) iii

5 PAPER SIZE SWITCH IMAGE TRANSFER IMAGE TRANSFER ROLLER IMAGE DENSITY SENSOR FUSING FUSING UNIT THERMISTOR FUSING LAMPS HOT ROLLER STRIPPER PAWLS HOT ROLLER THERMOSTAT PRESSURE ROLLER AND BUSHINGS NIP BAND WIDTH ADJUSTMENT CLEANING ROLLER DUPLEX UNIT (DUPLEX MODELS ONLY) DUPLEX EXIT SENSOR DUPLEX ENTRANCE SENSOR DUPLEX INVERTER SENSOR DUPLEX TRANSPORT MOTOR DUPLEX INVERTER MOTOR DUPLEX CONTROL BOARD OTHER REPLACEMENTS QUENCHING LAMP HIGH-VOLTAGE POWER SUPPLY BOARD BICU (BASE-ENGINE IMAGE CONTROL UNIT) MAIN MOTOR REAR EXHAUST FAN (B123 ONLY) LEFT EXHAUST FAN PSU (POWER SUPPLY UNIT) GEARBOX Replacement Procedure Gear Arrangement in the Gearbox COPY ADJUSTMENTS: PRINTING/SCANNING PRINTING Registration - Leading Edge/Side-to-Side Blank Margin Main Scan Magnification SCANNING Registration: Platen Mode Magnification Standard White Density Adjustment ADF IMAGE ADJUSTMENT Registration and Blank Margin Sub-scan Magnification TROUBLESHOOTING SERVICE CALL CONDITIONS SUMMARY SC CODE DESCRIPTIONS iv

6 4.2 ELECTRICAL COMPONENT DEFECTS SENSORS SWITCHES BLOWN FUSE CONDITIONS LED DISPLAY BICU SERVICE TABLES SERVICE PROGRAM MODE USING SP MODE Starting SP Mode Starting SSP Mode Selecting Programs Specifying Values Activating Copy Mode Quitting Programs/Ending (S)SP Mode SP MODE TABLES BASIC SP1-XXX (Feed) SP2-XXX (Drum) SP4-XXX (Scanner) SP5-XXX (Mode) SP6-XXX (Peripherals) SP7-XXX (Data Log) SP8-XXX (History) SP MODE TABLES MFP SP1-XXX (Feed) SP2-XXX (Drum) SP4-XXX (Scanner) SP5-XXX (Mode) SP6-XXX (Peripherals) SP7-XXX (Data Log) SP8-XXX (History) SP9-XXX (Etc.) ADJUSTING REGISTRATION AND MAGNIFICATION ID SENSOR ERROR ANALYSIS (SP2-221) DISPLAY APS DATA (SP ) Sensor Positions Reading the Data MEMORY CLEAR Basic Machine and MFP Machine Exceptions With Flash Memory Card (Basic Machine Only) Without Flash Memory Card INPUT CHECK (SP5-803) Conducting an Input Check Input Check Table OUTPUT CHECK (SP5-804) Conducting an Output Check Output Check Table v

7 SERIAL NUMBER INPUT (SP5-811) Specifying Characters Serial Number and NVRAM NVRAM DATA UPLOAD/DOWNLOAD (SP5-824/825) Overview NVRAM Upload (SP ) NVRAM Download (SP ) FIRMWARE UPDATE PROCEDURE FOR BASIC MACHINES TEST PATTERN PRINT (SP ) Executing Test Pattern Printing Test Patterns COUNTER EACH PAPER JAM (SP7-504) SMC PRINT (SP5-990) ORIGINAL JAM HISTORY DISPLAY (SP7-508) Viewing the Copy Jam History Jam History Code ADF APS SENSOR OUTPUT DISPLAY (SP6-901) Sensor Positions Reading Data FIRMWARE UPDATE PROCEDURE FOR MFP MACHINES BEFORE YOU BEGIN FIRMWARE UPDATE PROCEDURE FOR MFP MACHINES NVRAM DATA UPLOAD/DOWNLOAD Uploading Content of NVRAM to an SD card Downloading an SD Card to NVRAM DETAILED SECTION DESCRIPTIONS OVERVIEW COMPONENT LAYOUT PAPER PATH DRIVE LAYOUT BOARD STRUCTURE BLOCK DIAGRAM BICU (Base Engine and Image Control Unit) SBU (Sensor Board Unit) COPY PROCESS OVERVIEW SCANNING OVERVIEW Lamp Stabilizer Fuse SCANNER DRIVE ORIGINAL SIZE DETECTION IN PLATEN MODE IMAGE PROCESSING OVERVIEW SBU (SENSOR BOARD UNIT) IPU (IMAGE PROCESSING UNIT) Overview Image Processing Modes Image Processing Path Original Modes vi

8 SP Modes for Each Image Processing Step Auto Shading White Line Erase Black Line Erase Auto image density (ADS) Scanner Gamma (γ) Correction Main Scan Magnification Mirroring for ADF Mode Filtering ID Gamma (γ) Correction Gradation Processing VIDEO CONTROL UNIT (VCU) Fine Character and Image (FCI) Printer Gamma Correction LASER EXPOSURE OVERVIEW AUTO POWER CONTROL (APC) LD SAFETY SWITCH PHOTOCONDUCTOR UNIT (PCU) OVERVIEW DRIVE DRUM CHARGE OVERVIEW CHARGE ROLLER VOLTAGE CORRECTION Correction for Environmental Conditions ID SENSOR PATTERN PRODUCTION TIMING DRUM CHARGE ROLLER CLEANING DEVELOPMENT OVERVIEW DRIVE DEVELOPER MIXING DEVELOPMENT BIAS TONER SUPPLY Toner Bottle Replenishment Mechanism Toner Supply Mechanism TONER DENSITY CONTROL Overview Toner Density Sensor Initial Setting Toner Concentration Measurement Vsp/Vsg Detection Toner Supply Reference Voltage (Vref) Determination Toner Supply Determination Toner Supply Motor On Time Determinations TONER SUPPLY IN ABNORMAL SENSOR CONDITIONS ID Sensor TD Sensor vii

9 6.9.8 TONER NEAR END/END DETECTION AND RECOVERY Toner Near End Detection Toner Near End Recovery Toner End Detection Toner End Recovery DRUM CLEANING AND TONER RECYCLING DRUM CLEANING TONER RECYCLING PAPER FEED OVERVIEW PAPER FEED DRIVE MECHANISM PAPER FEED AND SEPARATION MECHANISM PAPER LIFT MECHANISM PAPER END DETECTION PAPER SIZE DETECTION Paper Tray By-pass Tray SIDE FENCES PAPER REGISTRATION IMAGE TRANSFER AND PAPER SEPARATION OVERVIEW IMAGE TRANSFER CURRENT TIMING TRANSFER ROLLER CLEANING PAPER SEPARATION MECHANISM IMAGE FUSING AND PAPER EXIT OVERVIEW FUSING UNIT DRIVE AND RELEASE MECHANISM Fusing Unit Drive Drive Release Mechanism Contact/Release Control Drive Release Solenoid FUSING ENTRANCE GUIDE SHIFT PRESSURE ROLLER FUSING TEMPERATURE CONTROL Overview Temperature Control OVERHEAT PROTECTION DUPLEX UNIT OVERALL DRIVE MECHANISM BASIC OPERATION Larger than A4 Short-edge/LT Short-edge Up to A4 Short-edge/LT Short-edge FEED IN AND EXIT MECHANISM ENERGY SAVER MODES OF BASIC MACHINES Overview AOF Timers Recovery viii

10 6.16 ENERGY SAVER MODES OF MFP MACHINES Overview AOF Timers Recovery PERIPHERALS ONE-BIN TRAY (B621) 1. REPLACEMENT AND ADJUSTMENT...B TRAY OPEN SWITCH... B PAPER SENSOR... B EXIT SENSOR... B DETAILED DESCRIPTION...B COMPONENTS... B SETTINGS... B621-5 Settings... B621-5 Limitation... B PAPER TRANSPORT... B PAPER HANDLING... B JUNCTION GATE... B PAPER-SIZE LIMITATION... B EXIT TRAY LED... B TRAY OPEN SWITCH... B TROUBLESHOOTING...B PAPER JAM... B PAPER-JAM HANDLING... B RESETTING THE COPIER... B COMPONENT-RELATED PAPER JAM... B Motor-Related Paper Jam... B Solenoid-Related Paper Jam... B ADF (B616) AND ARDF (B617) ADF (B616) AND ARDF (B617)...B616-1 ix

11 SPECIFICATIONS... SPEC-1 1. GENERAL SPECIFICATIONS...SPEC-1 Duplex Unit (B123 only)...spec-5 2. SUPPORTED PAPER SIZES...SPEC ORIGINAL SIZE DETECTION...SPEC-6 North America, Europe, Asia, Taiwan...SPEC-6 China, Korea...SPEC PAPER FEED AND EXIT...SPEC-8 Main Frame, Duplex...SPEC-8 Optional Paper Tray, One-Bin Tray, By-pass Tray...SPEC MACHINE CONFIGURATION...SPEC OPTIONAL EQUIPMENT...SPEC-15 ARDF...SPEC-15 ADF...SPEC-16 ONE-TRAY PAPER TRAY UNIT...SPEC-17 TWO-TRAY PAPER TRAY UNIT...SPEC-18 One-Bin Tray...SPEC-18 x

12 Model K-C2 (B121/B122/B123) PARTS CATALOG First edition, October 2003 Ricoh Company, LTD.

13 Input Document Property ModelCode PARTS CATALOG This catalog gives the numbers and names of parts on this machine. LOCATION OF UNIT EXTERIOR 1 (B121) EXTERIOR 2 (B122/B123) OPERATION PANEL (B121/B122/B123) OPTICS SECTION 1 (B121/B122/B123) OPTICS SECTION 2 (B121/B122/B123) OPTICS SECTION 3 (B121/B122/B123) LASER UNIT (B121/B122/B123) BY-PASS FEED SECTION (B121/B122/B123) PAPER CASSETTE (B121/B122/B123) PAPER RESISTRATION (B121/B122/B123) ST PAPER FEED SECTION (B121/B122/B123) ND PAPER FEED SECTION (B122/B123) VERTICAL TRANSPORT (B121/B122) PCU 1 (B121/B122/B123) PCU 2 (B121/B122/B123) TONER SUPPLY UNIT (B121/B122/B123) FUSING UNIT (B121/B122/B123) PAPER EXIT SECTION (B121/B122/B123) DUPLEX UNIT 1 (B123) DUPLEX UNIT 2 (B123) DUPLEX UNIT 3 (B123) DRIVE SECTION (B121/B122/B123) ELECTRICAL SECTION 1 (B121/B122/B123) ELECTRICAL SECTION 2 (B121/B122/B123) FRAME SECTION 1 (B121/B122/B123) FRAME SECTION 2 (B122/B123) BICU BOARD (B121/B122/B123) DECAL AND DOCUMENT (B121/B122/B123) SPECIAL TOOLS (B121/B122/B123) PARTS INDEX October,16 ' 2003

14 LOCATIONS OF UNITS 1. EXTERIOR 1 (B121) 2. EXTERIOR 2 (B122/B123) 3. OPERATION PANEL (B121/B122/B123) See Page 9 4. OPTICS SECTION 1 (B121/B122/B123) See Page OPTICS SECTION 2 (B121/B122/B123) See Page OPTICS SECTION 3 (B121/B122/B123) See Page 15 See Page 17 See Page 19 2

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