Ricon B245 User manual

B245/B276/B277
SERVICE MANUAL
002706MIU

B245/B276/B277
SERVICE MANUAL

B245/B276/B277
SERVICE MANUAL
002706MIU

It is the reader's responsibility when discussing the information contained
within this document to maintain a level of confidentiality that is in the best
interest of Ricoh Corporation and its member companies.
NO PART OF THIS DOCUMENT MAY BE REPRODUCED IN ANY
FASHION AND DISTRIBUTED WITHOUT THE PRIOR
PERMISSION OF RICOH CORPORATION.
All product names, domain names or product illustrations, including
desktop images, used in this document are trademarks, registered
trademarks or the property of their respective companies.
They are used throughout this book in an informational or editorial fashion
only and for the benefit of such companies. No such use, or the use of
any trade name, or web site is intended to convey endorsement or other
affiliation with Ricoh products.
©2007 RICOH Corporation. All rights reserved.

The Service Manual contains information
regarding service techniques, procedures,
processes and spare parts of office equipment
distributed by Ricoh Corporation. Users of this
manual should be either service trained or
certified by successfully completing a Ricoh
Technical Training Program.
Untrained and uncertified users utilizing
information contained in this service manual to
repair or modify Ricoh equipment risk personal
injury, damage to property or loss of warranty
protection.
Ricoh Corporation
WARNING

LEGEND
PRODUCT CODE COMPANY
GESTETNER LANIER RICOH SAVIN
*B245 DSm715 LD315 MP 1500 N/A
B276 DSm716 LD316 Aficio MP 1600 9016
B277 DSm721d LD320d Aficio MP 2000 9021d
B276 DSm716s LD316L Aficio MP 1600L 9016s
B277 DSm721ds LD320dL Aficio MP 2000L 9021ds
*Latin America Only
DOCUMENTATION HISTORY
REV. NO. DATE COMMENTS
* 06/2006 Original Printing
1 02/2007 B276/B277 Launch
2 02/2007 Added product launch model numbers

SM i B245/B276/B277
B245/B276/B277
TABLE OF CONTENTS
INSTALLATION
1. INSTALLATION ....................................................................... 1-1
1.1 INSTALLATION REQUIREMENTS .......................................................1-1
1.1.1 ENVIRONMENT ...........................................................................1-1
1.1.2 MACHINE LEVEL.........................................................................1-2
1.1.3 MINIMUM SPACE REQUIREMENTS ..........................................1-2
1.1.4 POWER REQUIREMENTS ..........................................................1-2
1.2 COPIER INSTALLATION ......................................................................1-3
1.2.1 POWER SOCKETS FOR PERIPHERALS ...................................1-3
1.2.2 ACCESSORY CHECK .................................................................1-3
1.2.3 INSTALLATION PROCEDURE ....................................................1-4
1.3 PLATEN COVER INSTALLATION ........................................................1-8
1.3.1 ACCESSORY CHECK .................................................................1-8
1.3.2 INSTALLATION PROCEDURE ....................................................1-8
1.4 ARDF INSTALLATION ..........................................................................1-9
1.4.1 ACCESSORY CHECK .................................................................1-9
1.4.2 INSTALLATION PROCEDURE ..................................................1-10
1.5 ADF INSTALLATION ...........................................................................1-13
1.5.1 ACCESSORY CHECK ...............................................................1-13
1.5.2 INSTALLATION PROCEDURE ..................................................1-13
1.6 TWO-TRAY PAPER TRAY UNIT INSTALLATION ..............................1-17
1.6.1 ACCESSORY CHECK ...............................................................1-17
1.6.2 INSTALLATION PROCEDURE ..................................................1-17
1.7 ONE-TRAY PAPER TRAY UNIT INSTALLATION...............................1-22
1.7.1 ACCESSORY CHECK ...............................................................1-22
1.7.2 INSTALLATION PROCEDURE ..................................................1-22
1.8 ONE-BIN TRAY INSTALLATION.........................................................1-26
1.8.1 ACCESSORY CHECK ...............................................................1-26
1.8.2 INSTALLATION PROCEDURE ..................................................1-26
1.9 ANTI-CONDENSATION HEATER INSTALLATION ............................1-29
1.10 TRAY HEATERS .............................................................................1-30
1.10.1 UPPER TRAY HEATER ...........................................................1-30
1.10.2 LOWER TRAY HEATER (TWO-TRAY MODEL ONLY) ...........1-32
1.10.3 TRAY HEATERS FOR THE OPTIONAL PAPER FEED UNITS1-33
1.11 KEY COUNTER INSTALLATION ....................................................1-37
1.12 KEY COUNTER INSTALLATION (20 PINS)....................................1-40
PREVENTIVE MAINTENANCE
2. PREVENTIVE MAINTENANCE ............................................... 2-1
2.1 PM TABLES ..........................................................................................2-1
Rev. 03/2007

B245/B276/B277 ii SM
2.2 HOW TO RESET THE PM COUNTER..................................................2-4
REPLACEMENT AND ADJUSTMENT
3. REPLACEMENT AND ADJUSTMENT....................................3-1
3.1 GENERAL CAUTIONS..........................................................................3-1
3.1.1 PCU (PHOTOCONDUCTOR UNIT).............................................3-1
3.1.2 TRANSFER ROLLER...................................................................3-1
3.1.3 SCANNER UNIT...........................................................................3-1
3.1.4 LASER UNIT ................................................................................3-2
3.1.5 FUSING UNIT ..............................................................................3-2
3.1.6 PAPER FEED...............................................................................3-2
3.2 SPECIAL TOOLS AND LUBRICANTS..................................................3-3
3.3 EXTERIOR COVERS & OPERATION PANEL......................................3-4
3.3.1 REAR COVER..............................................................................3-4
3.3.2 REAR LOWER COVER (TWO-TRAY MODELS ONLY) ..............3-4
3.3.3 COPY TRAY.................................................................................3-5
3.3.4 UPPER COVERS.........................................................................3-5
3.3.5 LEFT COVER...............................................................................3-6
3.3.6 FRONT COVER ...........................................................................3-6
3.3.7 FRONT RIGHT COVER...............................................................3-7
3.3.8 RIGHT REAR COVER..................................................................3-7
3.3.9 RIGHT DOOR (DUPLEX UNIT (B269/B277)) ..............................3-8
3.3.10 BY-PASS TRAY .........................................................................3-8
3.3.11 LEFT LOWER COVER (TWO-TRAY MODELS ONLY)..............3-9
3.3.12 RIGHT LOWER COVER (TWO-TRAY MODELS ONLY)...........3-9
3.3.13 PLATEN COVER SENSOR......................................................3-10
3.4 SCANNER UNIT..................................................................................3-11
3.4.1 EXPOSURE GLASS/DF EXPOSURE GLASS...........................3-11
3.4.2 LENS BLOCK.............................................................................3-11
3.4.3 LAMP STABILIZER BOARD AND EXPOSURE LAMP ..............3-12
3.4.4 ORIGINAL WIDTH/LENGTH SENSOR......................................3-13
3.4.5 SCANNER MOTOR....................................................................3-15
3.4.6 SCANNER HOME POSITION SENSOR....................................3-16
3.4.7 ADJUSTING SCANNER POSITIONS........................................3-17
3.5 LASER UNIT .......................................................................................3-21
3.5.1 LOCATION OF CAUTION DECAL.............................................3-21
3.5.2 TONER SHIELD GLASS............................................................3-21
3.5.3 LASER UNIT ..............................................................................3-22
3.5.4 LD UNIT .....................................................................................3-23
3.5.5 POLYGONAL MIRROR MOTOR................................................3-23
3.5.6 LASER UNIT ALIGNMENT ADJUSTMENT ...............................3-24
3.6 PCU SECTION....................................................................................3-26
3.6.1 PCU............................................................................................3-26
3.6.2 PICK-OFF PAWLS AND TONER DENSITY SENSOR...............3-27
3.6.3 OPC DRUM................................................................................3-28
3.6.4 CHARGE ROLLER AND CLEANING BRUSH ...........................3-29
3.6.5 CLEANING BLADE ....................................................................3-29

SM iii B245/B276/B277
3.6.6 DEVELOPER .............................................................................3-30
3.6.7 AFTER REPLACEMENT OR ADJUSTMENT ............................3-31
3.7 TONER SUPPLY MOTOR...................................................................3-32
3.8 PAPER FEED SECTION.....................................................................3-33
3.8.1 PAPER FEED ROLLER .............................................................3-33
3.8.2 FRICTION PAD..........................................................................3-33
3.8.3 PAPER END SENSOR...............................................................3-34
3.8.4 EXIT SENSOR ...........................................................................3-34
3.8.5 BY-PASS FEED ROLLER AND PAPER END SENSOR............3-35
3.8.6 REGISTRATION ROLLER.........................................................3-36
3.8.7 BY-PASS PAPER SIZE SWITCH...............................................3-37
3.8.8 REGISTRATION CLUTCH.........................................................3-38
3.8.9 REGISTRATION SENSOR ........................................................3-38
3.8.10 UPPER PAPER FEED CLUTCH AND BY-PASS FEED CLUTCH..
.................................................................................................3-39
3.8.11 RELAY CLUTCH......................................................................3-39
3.8.12 RELAY SENSOR......................................................................3-40
3.8.13 LOWER PAPER FEED CLUTCH (TWO-TRAY MODELS ONLY)
.................................................................................................3-40
3.8.14 VERTICAL TRANSPORT SENSOR (TWO-TRAY MODELS ONLY)
.................................................................................................3-41
3.8.15 PAPER SIZE SWITCH.............................................................3-41
3.9 IMAGE TRANSFER.............................................................................3-42
3.9.1 IMAGE TRANSFER ROLLER ....................................................3-42
3.9.2 IMAGE DENSITY SENSOR .......................................................3-42
3.10 FUSING...........................................................................................3-44
3.10.1 FUSING UNIT ..........................................................................3-44
3.10.2 THERMISTOR..........................................................................3-44
3.10.3 FUSING LAMPS.......................................................................3-45
3.10.4 HOT ROLLER STRIPPER PAWLS..........................................3-46
3.10.5 HOT ROLLER ..........................................................................3-46
3.10.6 THERMOSTAT.........................................................................3-47
3.10.7 PRESSURE ROLLER AND BUSHINGS..................................3-47
3.10.8 NIP BAND WIDTH ADJUSTMENT...........................................3-48
3.10.9 CLEANING ROLLER................................................................3-49
3.11 DUPLEX UNIT (DUPLEX MODELS B269/B277 ONLY)..................3-50
3.11.1 DUPLEX EXIT SENSOR..........................................................3-50
3.11.2 DUPLEX ENTRANCE SENSOR ..............................................3-50
3.11.3 DUPLEX INVERTER SENSOR................................................3-51
3.11.4 DUPLEX TRANSPORT MOTOR..............................................3-51
3.11.5 DUPLEX INVERTER MOTOR..................................................3-52
3.11.6 DUPLEX CONTROL BOARD...................................................3-52
3.12 OTHER REPLACEMENTS..............................................................3-53
3.12.1 QUENCHING LAMP.................................................................3-53
3.12.2 HIGH-VOLTAGE POWER SUPPLY BOARD...........................3-53
3.12.3 BICU (BASE-ENGINE IMAGE CONTROL UNIT).....................3-54
3.12.4 MAIN MOTOR..........................................................................3-54
3.12.5 REAR EXHAUST FAN (B269/B277 ONLY)..............................3-55
3.12.6 LEFT EXHAUST FAN...............................................................3-55

B245/B276/B277 iv SM
3.12.7 PSU (POWER SUPPLY UNIT).................................................3-56
3.12.8 GEARBOX................................................................................3-57
3.13 COPY ADJUSTMENTS PRINTING/SCANNING.............................3-60
3.13.1 PRINTING................................................................................3-60
3.13.2 SCANNING ..............................................................................3-62
3.13.3 ADF IMAGE ADJUSTMENT.....................................................3-64
TROUBLESHOOTING
4. TROUBLESHOOTING.............................................................4-1
4.1 SERVICE CALL CONDITIONS .............................................................4-1
4.1.1 SUMMARY...................................................................................4-1
4.1.2 SC CODE DESCRIPTIONS.........................................................4-2
4.2 ELECTRICAL COMPONENT DEFECTS.............................................4-18
4.2.1 SENSORS..................................................................................4-18
4.2.2 SWITCHES ................................................................................4-20
4.3 BLOWN FUSE CONDITIONS .............................................................4-22
4.4 LED DISPLAY .....................................................................................4-23
4.4.1 BICU...........................................................................................4-23
SERVICE TABLES
5. SERVICE TABLES ..................................................................5-1
5.1 SERVICE PROGRAM MODE................................................................5-1
5.1.1 HOW TO ENTER THE SP MODE................................................5-1
5.2 SP MODE TABLES ...............................................................................5-4
5.2.1 SP1-XXX (FEED) .........................................................................5-4
5.2.2 SP2-XXX (DRUM)........................................................................5-8
5.2.3 SP4-XXX (SCANNER) ...............................................................5-15
5.2.4 SP5-XXX (MODE)......................................................................5-23
5.2.5 SP6-XXX (PERIPHERALS)........................................................5-28
5.2.6 SP7-XXX (DATA LOG)...............................................................5-30
5.2.7 SP8-XXX (HISTORY).................................................................5-35
5.2.8 SP9-XXX (ETC.).........................................................................5-40
5.3 USING SP MODES .............................................................................5-41
5.3.1 ADJUSTING REGISTRATION AND MAGNIFICATION .............5-41
5.3.2 ID SENSOR ERROR ANALYSIS (SP 2221) ..............................5-42
5.3.3 DISPLAY APS DATA (SP 4301 1)..............................................5-43
5.3.4 MEMORY CLEAR ......................................................................5-44
5.3.5 INPUT CHECK (SP 5803)..........................................................5-46
5.3.6 OUTPUT CHECK (SP 5804)......................................................5-50
5.3.7 SERIAL NUMBER INPUT (SP 5811) .........................................5-52
5.3.8 NVRAM DATA UPLOAD/DOWNLOAD (SP 5824/5825)............5-52
5.3.9 FIRMWARE UPDATE PROCEDURE.........................................5-55
5.3.10 TEST PATTERN PRINT (SP 5902 1).......................................5-59
5.3.11 PAPER JAM COUNTERS (SP 7504).......................................5-61
5.3.12 SMC PRINT (SP 5990).............................................................5-62

SM v B245/B276/B277
5.3.13 ORIGINAL JAM HISTORY DISPLAY (SP 7508)......................5-63
5.3.14 ADF APS SENSOR OUTPUT DISPLAY (SP 6901).................5-63
DETAILED DESCRIPTIONS
6. DETAILED SECTION DESCRIPTIONS...................................6-1
6.1 OVERVIEW...........................................................................................6-1
6.1.1 COMPONENT LAYOUT...............................................................6-1
6.1.2 PAPER PATH...............................................................................6-2
6.1.3 DRIVE LAYOUT...........................................................................6-3
6.2 BOARD STRUCTURE...........................................................................6-4
6.2.1 BLOCK DIAGRAM........................................................................6-4
6.2.2 BICU (BASE ENGINE AND IMAGE CONTROL UNIT) ................6-5
6.2.3 SBU (SENSOR BOARD UNIT) ....................................................6-5
6.3 COPY PROCESS OVERVIEW..............................................................6-6
6.4 SCANNING............................................................................................6-8
6.4.1 OVERVIEW..................................................................................6-8
6.4.2 SCANNER DRIVE........................................................................6-9
6.4.3 ORIGINAL SIZE DETECTION IN PLATEN MODE.....................6-10
6.5 IMAGE PROCESSING........................................................................6-13
6.5.1 OVERVIEW................................................................................6-13
6.5.2 SBU (SENSOR BOARD UNIT) ..................................................6-14
6.5.3 IPU (IMAGE PROCESSING UNIT) ............................................6-15
6.5.4 VIDEO CONTROL UNIT (VCU)..................................................6-25
6.6 LASER EXPOSURE............................................................................6-27
6.6.1 OVERVIEW................................................................................6-27
6.6.2 AUTO POWER CONTROL (APC)..............................................6-28
6.6.3 LD SAFETY SWITCH.................................................................6-29
6.7 PHOTOCONDUCTOR UNIT (PCU) ....................................................6-30
6.7.1 OVERVIEW................................................................................6-30
6.7.2 DRIVE ........................................................................................6-31
6.8 DRUM CHARGE .................................................................................6-32
6.8.1 OVERVIEW................................................................................6-32
6.8.2 CHARGE ROLLER VOLTAGE CORRECTION..........................6-33
6.8.3 ID SENSOR PATTERN PRODUCTION TIMING........................6-34
6.8.4 DRUM CHARGE ROLLER CLEANING......................................6-34
6.9 DEVELOPMENT .................................................................................6-35
6.9.1 OVERVIEW................................................................................6-35
6.9.2 DRIVE ........................................................................................6-36
6.9.3 DEVELOPER MIXING................................................................6-36
6.9.4 DEVELOPMENT BIAS...............................................................6-37
6.9.5 TONER SUPPLY........................................................................6-38
6.9.6 TONER SUPPLY MECHANISM.................................................6-39
6.9.7 TONER DENSITY CONTROL....................................................6-39
6.9.8 TONER SUPPLY IN ABNORMAL SENSOR CONDITIONS.......6-43
6.9.9 TONER NEAR END/END DETECTION AND RECOVERY........6-44
6.10 DRUM CLEANING AND TONER RECYCLING...............................6-45
6.10.1 DRUM CLEANING ...................................................................6-45

B245/B276/B277 vi SM
6.10.2 TONER RECYCLING...............................................................6-46
6.11 PAPER FEED..................................................................................6-47
6.11.1 OVERVIEW..............................................................................6-47
6.11.2 PAPER FEED DRIVE MECHANISM........................................6-48
6.11.3 PAPER FEED AND SEPARATION MECHANISM ...................6-48
6.11.4 PAPER LIFT MECHANISM......................................................6-49
6.11.5 PAPER END DETECTION.......................................................6-49
6.11.6 PAPER SIZE DETECTION.......................................................6-50
6.11.7 SIDE FENCES .........................................................................6-52
6.11.8 PAPER REGISTRATION .........................................................6-52
6.12 IMAGE TRANSFER AND PAPER SEPARATION...........................6-54
6.12.1 OVERVIEW..............................................................................6-54
6.12.2 IMAGE TRANSFER CURRENT TIMING..................................6-55
6.12.3 TRANSFER ROLLER CLEANING............................................6-56
6.12.4 PAPER SEPARATION MECHANISM ......................................6-56
6.13 IMAGE FUSING AND PAPER EXIT................................................6-58
6.13.1 OVERVIEW..............................................................................6-58
6.13.2 FUSING UNIT DRIVE AND RELEASE MECHANISM..............6-59
6.13.3 FUSING ENTRANCE GUIDE SHIFT........................................6-60
6.13.4 PRESSURE ROLLER ..............................................................6-61
6.13.5 FUSING TEMPERATURE CONTROL .....................................6-61
6.13.6 OVERHEAT PROTECTION .....................................................6-63
6.14 DUPLEX UNIT.................................................................................6-65
6.14.1 OVERALL.................................................................................6-65
6.14.2 DRIVE MECHANISM................................................................6-66
6.14.3 BASIC OPERATION.................................................................6-66
6.14.4 FEED IN AND EXIT MECHANISM...........................................6-69
6.15 ENERGY SAVER MODES OF BASIC MACHINES.........................6-70
6.15.1 OVERVIEW..............................................................................6-70
6.15.2 AOF..........................................................................................6-71
6.15.3 TIMERS....................................................................................6-71
6.15.4 RECOVERY.............................................................................6-71
6.16 ENERGY SAVER MODES OF DDST MACHINES..........................6-72
6.16.1 OVERVIEW..............................................................................6-72
6.16.2 AOF..........................................................................................6-73
6.16.3 TIMERS....................................................................................6-73
6.16.4 RECOVERY.............................................................................6-73
SPECIFICATIONS
7. SPECIFICATIONS ...................................................................7-1
7.1 GENERAL SPECIFICATIONS...............................................................7-1
7.2 SUPPORTED PAPER SIZES................................................................7-5
7.2.1 ORIGINAL SIZE DETECTION......................................................7-5
7.2.2 PAPER FEED AND EXIT.............................................................7-7
7.3 MACHINE CONFIGURATION.............................................................7-10
7.4 OPTIONAL EQUIPMENT....................................................................7-12
7.4.1 ARDF..........................................................................................7-12

SM vii B245/B276/B277
7.4.2 ADF............................................................................................7-12
7.4.3 ONE-TRAY PAPER TRAY UNIT................................................7-13
7.4.4 TWO-TRAY PAPER TRAY UNIT ...............................................7-13
7.4.5 ONE-BIN TRAY .........................................................................7-14
DOCUMENT FEEDER (B813)
SEE SECTION B813 FOR DETAILED TABLE OF CONTENTS
ARDF (B814)
SEE SECTION B814 FOR DETAILED TABLE OF CONTENTS
DDST UNIT (B865/B866)
SEE SECTION B865/B866 FOR DETAILED TABLE OF CONTENTS
MFP EXPANSION CONTROLLER BOX/PRINTER
SCANNER/FAX (B843/B867/B868)
SEE SECTION B843/B867/B868 FOR DETAILED TABLE OF CONTENTS
PRINTER/SCANNER UNIT (B867)
SEE SECTION B867 FOR DETAILED TABLE OF CONTENTS
FAX OPTION (B868)
SEE SECTION B868 FOR DETAILED TABLE OF CONTENTS