Ricoh C231 User manual

®
SERVICE MANUAL
PN: RCSMC231
C231
®
RICOH GROUP COMPANIES

SERVICE MANUAL
C231
RICOH GROUP COMPANIES
®
®
®

C231
SERVICE MANUAL
PN:RCSMC231

The Service Manual contains informatio
n
regarding service techniques, procedures,
processes and spare parts of office equipmen
t
distributed by Ricoh Corporation. Users of thi
s
manual should be either service trained o
r
certified by successfully completing a Rico
h
Technical Training Program.
Untrained and uncertified users utilizin
g
information contained in this service manual t
o
repair or modify Ricoh equipment risk persona
l
injury, damage to property. or loss of warrant
y
protection.
Ricoh Corporation
WARNING

LEGEND
PRODUCT CODE COMPANY
RICOH SAVIN GESTETNER
C231 JP1030 3150DNP 5306L
DOCUMENTATION HISTORY
REV. NO. DATE COMMENTS
*7/98 Original Printing

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SM C231
C231
TABLE OF CONTENTS
OVERALL INFORMATION...............................................................1-1
1.1 SPECIFICATION...................................................................................... 1-1
1.2 GUIDE TO COMPONENTS AND THEIR FUNCTION.............................. 1-5
1.2.1 MACHINE EXTERIOR..................................................................... 1-5
1.2.2 MACHINE INTERIOR...................................................................... 1-6
1.2.3 OPERATION PANEL....................................................................... 1-7
Keys..................................................................................................... 1-7
Indicators ............................................................................................. 1-9
1.3 PRINTING PROCESS............................................................................ 1-10
1.4 MECHANICAL COMPONENT LAYOUT................................................. 1-11
1.5 ELECTRICAL COMPONENT LAYOUT.................................................. 1-12
1.5.1 ADF................................................................................................ 1-12
1.5.2 MAIN BODY................................................................................... 1-13
Boards................................................................................................ 1-14
Motors................................................................................................ 1-14
Solenoids........................................................................................... 1-15
Switches............................................................................................. 1-15
Sensors.............................................................................................. 1-15
Counters ............................................................................................ 1-16
Others................................................................................................ 1-16
1.6 DRIVE LAYOUT ..................................................................................... 1-17
DETAILED SECTION DESCRIPTIONS............................................2-1
2.1 SCANNER AND OPTICS ......................................................................... 2-1
2.1.1 BOOK SCANNER OVERVIEW........................................................ 2-1
2.1.2 ADF OVERVIEW ............................................................................. 2-2
2.1.3 CONTACT IMAGE SENSOR........................................................... 2-4
2.1.4 DRIVE MECHANISM....................................................................... 2-5
Book Scanner....................................................................................... 2-5
ADF...................................................................................................... 2-6
2.1.5 PICK-UP AND FEED (ADF)............................................................. 2-7
2.1.6 SEPARATION MECHANISM (ADF) ................................................ 2-8
2.1.7 ERROR CONDITIONS .................................................................... 2-9
Book Scanner....................................................................................... 2-9
ADF...................................................................................................... 2-9
2.2 IMAGE-PROCESSING........................................................................... 2-10
2.2.1 OVERVIEW ................................................................................... 2-10
2.2.2 A/D CONVERSION PROCESSING............................................... 2-11
Shading Distortion Correction ............................................................ 2-11
Original Background Correction......................................................... 2-12
Peak Hold .......................................................................................... 2-12

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C231 SM
2.2.3 BINARY PROCESSING................................................................. 2-13
Data Compensation Processing......................................................... 2-13
MTF Correction.................................................................................. 2-14
Binary Processing in Letter/Photo Mode............................................ 2-14
Error Diffusion.................................................................................... 2-15
2.2.4 MAIN SCAN MAGNIFICATION...................................................... 2-16
2.2.5 IMAGE POSITION ADJUSTMENT IN THE MAIN
SCAN DIRECTION........................................................................ 2-17
2.2.6 PASTE SHADOW ERASE MODE................................................. 2-17
2.2.7 THERMAL HEAD........................................................................... 2-18
Specifications..................................................................................... 2-18
Thermal Head Control........................................................................ 2-18
Thermal Head Protection................................................................... 2-18
Remarks for Handling the Thermal Head........................................... 2-19
2.3 MASTER EJECT .................................................................................... 2-20
2.3.1 OVERALL ...................................................................................... 2-20
2.3.2 MASTER CLAMPER OPEN MECHANISM.................................... 2-21
Drum Position Lock Mechanism......................................................... 2-21
2.3.3 MASTER EJECT ROLLER MECHANISM ..................................... 2-22
2.3.4 PRESSURE PLATE MECHANISM................................................ 2-23
2.4 MASTER FEED ...................................................................................... 2-24
2.4.1 OVERALL ...................................................................................... 2-24
2.4.2 MASTER FEED MECHANISM....................................................... 2-25
2.4.3 MASTER CLAMPER OPERATION AND TENSION ROLLER
RELEASE MECHANISM ............................................................... 2-26
2.4.4 CUTTER MECHANISM ................................................................. 2-27
2.5 DRUM..................................................................................................... 2-28
2.5.1 OVERALL ...................................................................................... 2-28
2.5.2 DRUM DRIVE MECHANISM ......................................................... 2-29
2.5.3 INK SUPPLY MECHANISM........................................................... 2-30
2.5.4 INK ROLLER MECHANISM........................................................... 2-31
2.5.5 INK SUPPLY CONTROL............................................................... 2-32
2.5.6 DETECTION OF MASTERS ON THE DRUM................................ 2-33
2.6 PAPER FEED......................................................................................... 2-34
2.6.1 OVERALL ...................................................................................... 2-34
2.6.2 PAPER FEED MECHANISM ......................................................... 2-35
2.6.3 PAPER FEED/SEPARATION PRESSURE ADJUSTMENT
MECHANISM................................................................................. 2-36
2.6.4 REGISTRATION ROLLER MECHANISM...................................... 2-37
Registration Roller Drive .................................................................... 2-37
Registration Roller Up/Down Mechanism........................................... 2-38
2.6.5 PRINTING PRESSURE MECHANISM.......................................... 2-39
2.6.6 PAPER TABLE MECHANISM........................................................ 2-40
Table Up and Down Mechanism........................................................ 2-40
Paper End Detection Mechanism....................................................... 2-40
Paper Table Side Fence Mechanism................................................. 2-41
Paper Table Side-to-Side Shift Mechanism ....................................... 2-41
Side Fence Friction Pads................................................................... 2-42

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SM C231
2.7 PAPER DELIVERY................................................................................. 2-43
2.7.1 OVERALL ...................................................................................... 2-43
2.7.2 PAPER DELIVERY UNIT DRIVE MECHANISM............................ 2-44
2.7.3 PAPER SEPARATION FROM DRUM ........................................... 2-45
2.7.4 EXIT PAWL DRIVE MECHANISM................................................. 2-46
2.8 ERROR DETECTION............................................................................. 2-47
2.8.1 ORIGINAL JAM DETECTION........................................................ 2-47
2.8.2 MASTER EJECT JAM DETECTION.............................................. 2-47
2.8.3 MASTER FEED JAM DETECTION................................................ 2-48
2.8.4 PAPER FEED JAM DETECTION .................................................. 2-49
INSTALLATION................................................................................3-1
3.1 INSTALLATION REQUIREMENTS .......................................................... 3-1
3.1.1 OPTIMUM ENVIRONMENTAL CONDITION................................... 3-1
3.1.2 ENVIRONMENTS TO AVOID.......................................................... 3-1
3.1.3 POWER CONNECTION.................................................................. 3-1
3.1.4 ACCESS TO MACHINE................................................................... 3-2
3.2 INSTALLATION PROCEDURE ................................................................ 3-3
3.2.1 MAIN BODY..................................................................................... 3-3
Accessory Check ................................................................................. 3-3
Installation Procedure .......................................................................... 3-4
3.2.2 AUTO DOCUMENT FEEDER (OPTION)......................................... 3-9
Accessory Check ................................................................................. 3-9
Installation Procedure ........................................................................ 3-10
3.2.3 TAPE MARKER (OPTION)............................................................ 3-14
Accessory Check ............................................................................... 3-14
Installation Procedure - For C231 -.................................................... 3-15
3.2.4 COLOR DRUM (OPTION) ............................................................. 3-17
3.2.5 INTERFACE BOARD (OPTION).................................................... 3-18
Accessory Check ............................................................................... 3-18
Installation Procedure ........................................................................ 3-18
SERVICE TABLES...........................................................................4-1
4.1 SERVICE REMARKS ............................................................................... 4-1
4.1.1 MASTER FEED SECTION............................................................... 4-1
1. Thermal Head Installation................................................................ 4-1
2. Thermal Head Voltage Adjustment .................................................. 4-1
4.1.2 PAPER FEED SECTION ................................................................. 4-1
1. Friction Pad...................................................................................... 4-1
2. Paper Feed Roller and Paper Separation Roller.............................. 4-1
3. Paper Guide Plate Position for Registration Roller........................... 4-1
4.1.3 DRUM AND DRUM DRIVE SECTION............................................. 4-2
1. Main Motor....................................................................................... 4-2
2. Doctor Roller.................................................................................... 4-2
3. Drum Master Clamper...................................................................... 4-2

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C231 SM
4. Ink Roller Unit................................................................................... 4-2
5. Ink Pump.......................................................................................... 4-2
4.1.4 PAPER DELIVERY SECTION......................................................... 4-3
1. Exit Pawl .......................................................................................... 4-3
4.1.5 ELECTRICAL COMPONENTS........................................................ 4-3
1. Main Processing Unit (MPU) 1......................................................... 4-3
2. Main Processing Unit (MPU) 2......................................................... 4-3
3. Power Supply Unit............................................................................ 4-3
4. Sensor Adjustments......................................................................... 4-3
4.2 DIP SW, LED, VR, TP, AND FUSE TABLES............................................ 4-4
4.2.1 TEST POINTS ................................................................................. 4-4
MPU..................................................................................................... 4-4
4.2.2 POTENTIOMETERS........................................................................ 4-4
MPU..................................................................................................... 4-4
Power Supply Unit................................................................................ 4-4
4.2.3 LED'S............................................................................................... 4-4
4.2.4 FUSES............................................................................................. 4-5
MPU..................................................................................................... 4-5
PSU...................................................................................................... 4-5
4.3 SERVICE CALL CODES .......................................................................... 4-6
4.4 SERVICE PROGRAM MODE................................................................... 4-8
4.4.1 ACCESS PROCEDURE .................................................................. 4-8
Service Program Mode Access Procedure (For Engineers)................. 4-8
Service Program Mode Access Procedure (For Users) ....................... 4-9
Change Adjustment Values or Modes................................................ 4-10
4.4.2 SERVICE PROGRAM TABLE ....................................................... 4-11
Remarks............................................................................................. 4-20
4.4.3 INPUT/OUTPUT CHECK MODE................................................... 4-23
Input/Output Check Mode Access Procedure.................................... 4-23
Input Check Table.............................................................................. 4-24
Output Check Table........................................................................... 4-26
4.5 TEST PATTERN IMAGE MODE............................................................. 4-28
4.6 USER CODE MODE............................................................................... 4-29
PREVENTIVE MAINTENANCE........................................................5-1
5.1 MAINTENANCE TABLE ........................................................................... 5-1
REPLACEMENT AND ADJUSTMENT.............................................6-1
6.1 EXTERIOR COVER REMOVAL............................................................... 6-1
6.1.1 ADF.................................................................................................. 6-1
6.1.2 OPERATION PANEL....................................................................... 6-2
6.1.3 PLATEN COVER AND UPPER COVERS ....................................... 6-3
6.1.4 TOP COVER AND EXPOSURE GLASS ......................................... 6-3
6.1.5 OTHER COVERS............................................................................ 6-4

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SM C231
6.2 COPY IMAGE ADJUSTMENT.................................................................. 6-6
6.2.1 LEADING EDGE REGISTRATION ADJUSTMENT......................... 6-6
6.2.2 SIDE-TO-SIDE REGISTRAION ADJUSTMENT.............................. 6-7
6.2.3 VERTICAL MAGNIFICATION ADJUSTMENT................................. 6-8
6.2.4 LEADING EDGE BLANK MARGIN ADJUSTMENT......................... 6-9
6.3 MPU REPLACEMENT............................................................................ 6-10
6.4 ORIGINAL FEED SECTION................................................................... 6-11
6.4.1 ADF ROLLER ASSSEMBLY.......................................................... 6-11
6.4.2 PICK-UP ROLLER......................................................................... 6-11
6.4.3 FEED ROLLER.............................................................................. 6-12
6.4.4 SEPARATION ROLLER ................................................................ 6-12
6.4.5 ADF MOTOR AND COVERS......................................................... 6-13
6.4.6 R0 AND R1 ROLLERS .................................................................. 6-13
6.4.7 R2 ROLLER................................................................................... 6-14
6.4.8 DOCUMENT SENSOR.................................................................. 6-15
6.4.9 SCAN LINE SENSOR.................................................................... 6-15
6.4.10 COVER SENSORS...................................................................... 6-16
6.5 MASTER FEED SECTION ..................................................................... 6-17
6.5.1 MASTER MAKING UNIT REMOVAL............................................. 6-17
6.5.2 THERMAL HEAD REMOVAL ........................................................ 6-19
Remarks for thermal head installation................................................ 6-20
6.5.3 THERMAL HEAD VOLTAGE ADJUSTMENT................................ 6-21
6.5.4 MASTER END SENSOR ADJUSTMENT ...................................... 6-23
6.6 MASTER EJECT SECTION.................................................................... 6-24
6.6.1 MASTER EJECT UNIT REMOVAL................................................ 6-24
6.7 PAPER FEED SECTION........................................................................ 6-25
6.7.1 PAPER FEED ROLLER, PICK-UP ROLLER,
AND FRICTION PAD.................................................................... 6-25
6.7.2 PAPER SEPARATION PRESSURE ADJUSTMENT..................... 6-26
6.7.3 PAPER FEED PRESSURE ADJUSTMENT .................................. 6-27
6.7.4 REGISTRATION ROLLER CLEARANCE ADJUSTMENT............. 6-28
6.8 PRINTING SECTION.............................................................................. 6-29
6.8.1 PRESS ROLLER REMOVAL......................................................... 6-29
6.8.2 PRESS ROLLER LOCK LEVER ADJUSTMENT........................... 6-30
6.8.3 PRINTING PRESSURE ADJUSTMENT........................................ 6-32
6.9 DRUM AND DRIVE SECTION................................................................ 6-33
6.9.1 DRUM CLOTH SCREEN REMOVAL............................................. 6-33
Remarks for the cloth screen installation ........................................... 6-34
6.9.2 DRUM MASTER CLAMPER AND METAL SCREEN REMOVAL.. 6-36
Remarks for drum screen installation................................................. 6-38
6.9.3 INK ROLLER UNIT REMOVAL...................................................... 6-39
6.9.4 DOCTOR ROLLER GAP ADJUSTMENT ...................................... 6-41
6.9.5 INK DETECTION ADJUSTMENT.................................................. 6-43
6.9.6 INK PUMP REMOVAL AND PLUNGER
POSITION ADJUSTMENT............................................................. 6-44
6.9.7 MAIN DRIVE TIMING BELT TENSION ADJUSTMENT................. 6-46
6.9.8 MAIN MOTOR PULLEY POSITION ADJUSTMENT...................... 6-48

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C231 SM
6.10 PAPER DELIVERY SECTION.............................................................. 6-49
6.10.1 VACUUM UNIT REMOVAL.......................................................... 6-49
6.10.2 DELIVERY BELT/PAPER EXIT SENSOR REMOVAL................. 6-50
6.10.3 VACUUM MOTOR REMOVAL..................................................... 6-51
6.10.4 EXIT PAWL CLEARANCE ADJUSTMENT.................................. 6-52
6.10.5 EXIT PAWL DRIVE TIMING ADJUSTMENT ............................... 6-53
TAPE MARKER C532
SPECIFICATIONS............................................................................7-1
BASIC OPERATION ........................................................................7-2
2.1 OVERVIEW .............................................................................................. 7-2
2.2 DRIVE AND CUTTING MECHANISM....................................................... 7-3
2.3 MANUAL CUT .......................................................................................... 7-4
REPLACEMENT AND ADJUSTMENT.............................................7-5
3.1 CUTTER REPLACEMENT ....................................................................... 7-5
3.2 CUTTER HOME POSITION SENSOR REPLACEMENT.......................... 7-6
3.3 TAPE CUT LENGTH ADJUSTMENT ....................................................... 7-7
PRIPORT CONTROLLER USER’S GUIDE......................................8-1
POINT TO POINT DIAGRAM

IMPORTANT SAFETY NOTICES
PREVENTION OFPHYSICAL INJURY
1. Before disassembling or assembling parts of the printer and peripherals, make
sure that the power cord is unplugged.
2. The wall outlet should be near the printer and easilyaccessible.
3. If anyadjustmentor operation check has to be made with exterior covers off or
open while the main switch is turned on, keep hands awayfrom electrified or
mechanicallydriven components.
HEALTH SAFETY CONDITIONS
1. If you get ink in your eyes byaccident, tryto remove it with eye drops or flush
with water as first aid.If unsuccessful,get medical attention.
2. If you ingest ink byaccident, induce vomiting bysticking a finger down your
throat or bygiving soapyor strong saltywater to drink.
OBSERVANCE OF ELECTRICAL SAFETY STANDARDS
1. The printer and its peripherals must be installed and maintained bya customer
service representative who has completed the training course on those models.
CAUTION
The RAM has a lithium batterywhich can explode if handledincorrectly.
Replace onlywith the same type of RAM. Do not recharge or burn this
battery. Used RAM's must be handled in accordance with local regulations.
ATTENTION
La carte RAM comporte une pile aulithium qui présente un risque
d'explosion en cas de mauvaise manipulation. Remplacer la pile
uniquement par une carte RAM identique. Ne pas recharger ni brûler cette
pile. Les cartes RAM usagées doivent être éliminées conformément aux
réglementations locales.

SAFETY AND ECOLOGICAL NOTES FOR DISPOSAL
1. Dispose of replaced parts in accordance with local regulations.
2. Used ink and masters should be disposed of in an environmentallysafe
manner and in accordance with local regulations.
3. When keeping used lithium batteries (from the main processing units) in order
to dispose of them later, do not store more than 100 batteries (from the main
processing units) per sealed box. Storing larger numbers or not sealing them
apart maylead to chemical reactionsand heat build-up.

OVERALL INFORMATION
DETAILED SECTION DESCRIPTIONS
INSTALLATION
SERVICE TABLES
PREVENTIVE MAINTENANCE
REPLACEMENT AND ADJUSTMENT
TAPE MARKER C532
PRIPORT CONTROLLER USER’S GUIDE
TAB
POSITION 2 TAB
POSITION 1
TAB
POSITION 3
TAB
POSITION 4
TAB
POSITION 6 TAB
POSITION 5
TAB
POSITION 8 TAB
POSITION 7