Ricoh A230 User manual

SERVICE MANUAL
000861MIU
A230/A231/A232
RICOH GROUP COMPANIES

SERVICE MANUAL
A230/A231/A232
RICOH GROUP COMPANIES
®
®

A230/A231/A232
SERVICE MANUAL
000861MIU

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document to maintain a level of confidentiality that is in the best interest of Ricoh
Corporation and its member companies.
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PERMISSION OF RICOH CORPORATION.
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used in this document are trademarks, registered trademarks or the property of their
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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.
2000 RICOH Corporation. All rights reserved.

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 Corporatio
n
WARNING

LEGEND
PRODUCT
CODE COMPANY
GESTETNER RICOH SAVIN
A230 3235s Aficio 340 9935D
A231 3235 Aficio 350 9935DP
A232 3245 Aficio 450 9945P
DOCUMENTATION HISTORY
REV. NO. DATE COMMENTS
* 5/98 Original Printing
1 6/98 ..Revised pages
2 1/99 G909/G912 Addition
3 5/99 A695 Addition
Rev. 5/15/99

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SM A230/A231/A232
A230/A231/A232
TABLE OF CONTENTS
1. OVERALL MACHINE INFORMATION........................................1-1
1.1 SPECIFICATIONS.................................................................................... 1-1
1.2 PAPER EXIT TRAY SELECTION............................................................. 1-5
1.3 MACHINE CONFIGURATION.................................................................. 1-6
1.3.1 SYSTEM COMPONENTS ............................................................... 1-6
1.3.2 INSTALLABLE OPTION TABLE...................................................... 1-8
Copier options...................................................................................... 1-8
Fax options .......................................................................................... 1-8
1.4 MECHANICAL COMPONENT LAYOUT................................................... 1-9
1.5 PAPER PATH......................................................................................... 1-11
1.6 ELECTRICAL COMPONENT DESCRIPTIONS...................................... 1-12
1.7 DRIVE LAYOUT ..................................................................................... 1-15
1.8 COPY PROCESS................................................................................... 1-16
1.8.1 OVERVIEW ................................................................................... 1-16
1.9 BOARD STRUCTURE............................................................................ 1-18
1.9.1 BLOCK DIAGRAM......................................................................... 1-18
1.9.2 DESCRIPTIONS............................................................................ 1-19
2. DETAILED SECTION DESCRIPTIONS.......................................2-1
2.1 SCANNING............................................................................................... 2-1
2.1.1 OVERVIEW ..................................................................................... 2-1
2.1.2 SCANNER DRIVE ........................................................................... 2-2
2.1.3 ORIGINAL SIZE DETECTION IN PLATEN MODE.......................... 2-3
2.2 IMAGE PROCESSING ............................................................................. 2-5
2.2.1 OVERVIEW ..................................................................................... 2-5
2.2.2 SBU ................................................................................................. 2-6
2.2.3 AUTO IMAGE DENSITY (ADS)....................................................... 2-7
2.2.4 IPU (IMAGE PROCESSING UNIT).................................................. 2-8
Overview.............................................................................................. 2-8
Image processing path......................................................................... 2-9
SP modes for each image process .................................................... 2-10
Auto shading...................................................................................... 2-12
Background erase.............................................................................. 2-12
Independent dot erase ....................................................................... 2-13
Filtering, main scan magnification/reduction ...................................... 2-14
Gamma (γ) correction......................................................................... 2-15
Gradation processing......................................................................... 2-15
2.2.5 MEMORY BLOCK.......................................................................... 2-18
Binary picture processing mode......................................................... 2-19
Grayscale processing mode............................................................... 2-20
2.2.6 FCI (FINE CHARACTER IMAGE).................................................. 2-21
2.3 LASER EXPOSURE............................................................................... 2-22

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A230/A231/A232 SM
2.3.1 OVERVIEW ................................................................................... 2-22
2.3.2 OPTICAL PATH............................................................................. 2-23
2.3.3 AUTO POWER CONTROL (APS) ................................................. 2-24
2.3.4 DUAL BEAM WRITING.................................................................. 2-25
2.3.5 LASER BEAM PITCH CHANGE MECHANISM............................. 2-26
2.3.6 LD SAFETY SWITCHES ............................................................... 2-27
2.4 PHOTOCONDUCTOR UNIT (PCU)........................................................ 2-28
2.4.1 OVERVIEW ................................................................................... 2-28
2.4.2 DRIVE MECHANISM..................................................................... 2-29
2.5 DRUM CHARGE..................................................................................... 2-30
2.5.1 OVERVIEW ................................................................................... 2-30
2.5.2 CHARGE ROLLER VOLTAGE CORRECTION ............................. 2-31
Correction for environmental conditions............................................. 2-31
Correction for paper width and thickness (bypass tray only).............. 2-32
2.5.3 ID SENSOR PATTERN PRODUCTION TIMING........................... 2-33
2.5.4 DRUM CHARGE ROLLER CLEANING......................................... 2-33
2.6 DEVELOPMENT..................................................................................... 2-34
2.6.1 OVERVIEW ................................................................................... 2-34
2.6.2 DRIVE MECHANISM..................................................................... 2-35
2.6.3 DEVELOPER MIXING................................................................... 2-36
2.6.4 DEVELOPMENT BIAS................................................................... 2-37
Correction for paper width and thickness (bypass tray only).............. 2-37
2.6.5 TONER SUPPLY........................................................................... 2-38
Toner bottle replenishment mechanism............................................. 2-38
Toner supply mechanism................................................................... 2-39
2.6.6 TONER DENSITY CONTROL ....................................................... 2-40
Overview............................................................................................ 2-40
Toner density control flow chart ......................................................... 2-40
Sensor control mode.......................................................................... 2-41
Image Pixel Count Control Mode. ...................................................... 2-42
2.6.7 TONER NEAR END/END DETECTION......................................... 2-43
Toner near end/end detection flow chart............................................ 2-43
2.6.8 TONER END RECOVERY............................................................. 2-45
Toner end recovery flow chart............................................................ 2-45
2.6.9 TONER SUPPLY IN ABNORMAL SENSOR CONDITIONS.......... 2-46
2.7 DRUM CLEANING AND TONER RECYCLING...................................... 2-47
2.7.1 DRUM CLEANING......................................................................... 2-47
2.7.2 TONER RECYCLING .................................................................... 2-48
2.8 PAPER FEED......................................................................................... 2-49
2.8.1 OVERVIEW ................................................................................... 2-49
2.8.2 PAPER FEED DRIVE MECHANISM ............................................. 2-50
2.8.3 PICK-UP AND SEPARATION ROLLER RELEASE MECHANISM 2-51
2.8.4 PAPER LIFT MECHANISM............................................................ 2-52
2.8.5 PAPER END DETECTION............................................................. 2-54
2.8.6 PAPER REGISTRATION............................................................... 2-55
2.8.7 PAPER FEED AND JAM TIMING.................................................. 2-56
2.9 IMAGE TRANSFER AND PAPER SEPARATION.................................. 2-57
2.9.1 OVERVIEW ................................................................................... 2-57
2.9.2 BELT DRIVE MECHANISM........................................................... 2-58

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2.9.3 IMAGE TRANSFER AND PAPER SEPARATION MECHANISM.. 2-58
2.9.4 TRANSFER BELT UNIT CONTACT MECHANISM....................... 2-60
2.9.5 TRANSFER BELT CHARGE ......................................................... 2-61
Overview............................................................................................ 2-61
Correction for paper width and thickness........................................... 2-62
Currents applied to leading edge and image areas............................ 2-62
2.9.6 TRANSFER BELT CLEANING MECHANISM................................ 2-63
2.10 IMAGE FUSING AND PAPER EXIT..................................................... 2-64
2.10.1 OVERVIEW ................................................................................. 2-64
2.10.2 FUSING DRIVE AND RELEASE MECHANISM........................... 2-65
2.10.3 FUSING ENTRANCE GUIDE SHIFT MECHANISM.................... 2-66
2.10.4 PRESSURE ROLLER.................................................................. 2-67
2.10.5 CLEANING MECHANISM............................................................ 2-67
2.10.6 FUSING TEMPERATURE CONTROL......................................... 2-68
Temperature Control.......................................................................... 2-68
Fusing Idling....................................................................................... 2-68
2.10.7 OVERHEAT PROTECTION......................................................... 2-69
2.11 ENERGY SAVER MODES ................................................................... 2-70
2.11.1 OVERVIEW ................................................................................. 2-70
2.11.2 ENERGY SAVER MODE............................................................. 2-71
Entering the energy saver mode........................................................ 2-71
What happens in energy saver mode................................................. 2-71
Return to stand-by mode.................................................................... 2-71
2.11.3 LOW POWER MODE .................................................................. 2-72
Entering the low power mode............................................................. 2-72
What happens in low power mode..................................................... 2-72
Return to stand-by mode.................................................................... 2-72
2.11.4 AUTO OFF MODE....................................................................... 2-73
Entering auto off mode....................................................................... 2-73
What happens in auto off mode ......................................................... 2-73
Returning to stand-by mode............................................................... 2-73
2.11.5 NIGHT MODE.............................................................................. 2-74
Entering night stand-by and night modes........................................... 2-74
What happens in night stand-by and night modes............................. 2-74
Returning to stand-by mode............................................................... 2-75
3. INSTALLATION PROCEDURE...................................................3-1
3.1 INSTALLATION REQUIREMENTS .......................................................... 3-1
3.1.1 ENVIRONMENT .............................................................................. 3-1
3.1.2 MACHINE LEVEL............................................................................ 3-1
3.1.3 MINIMUM SPACE REQUIREMENTS.............................................. 3-2
3.1.4 POWER REQUIREMENTS.............................................................. 3-3
3.2 INSTALLATION FLOW CHART................................................................ 3-4
3.3 COPIER INSTALLATION.......................................................................... 3-5
3.3.1 ACCESSORY CHECK..................................................................... 3-5
3.3.2 INSTALLATION PROCEDURE........................................................ 3-6
3.4 PAPER TRAY UNIT INSTALLATION ..................................................... 3-12
3.4.1 ACCESSORY CHECK................................................................... 3-12
3.4.2 INSTALLATION PROCEDURE...................................................... 3-13

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A230/A231/A232 SM
3.5 INTERCHANGE UNIT INSTALLATION.................................................. 3-17
3.5.1 ACCESSORY CHECK................................................................... 3-17
3.5.2 INSTALLATION PROCEDURE...................................................... 3-18
3.6 1-BIN TRAY UNIT INSTALLATION ........................................................ 3-22
3.6.1 ACCESSORY CHECK................................................................... 3-22
3.6.2 INSTALLATION PROCEDURE...................................................... 3-23
3.7 BRIDGE UNIT INSTALLATION.............................................................. 3-28
3.7.1 ACCESSORY CHECK................................................................... 3-28
3.7.2 INSTALLATION PROCEDURE...................................................... 3-29
3.8 AUTO REVERSE DOCUMENT FEEDER INSTALLATION.................... 3-31
3.8.1 ACCESSORY CHECK................................................................... 3-31
3.8.2 INSTALLATION PROCEDURE...................................................... 3-32
3.9 DUPLEX UNIT INSTALLATION.............................................................. 3-34
3.9.1 ACCESSORY CHECK................................................................... 3-34
3.9.2 INSTALLATION PROCEDURE...................................................... 3-35
3.10 BY-PASS FEED UNIT INSTALLATION................................................ 3-39
3.10.1 ACCESSORY CHECK................................................................. 3-39
3.10.2 INSTALLATION PROCEDURE.................................................... 3-39
3.11 LCT INSTALLATION............................................................................. 3-41
3.11.1 ACCESSORY CHECK................................................................. 3-41
3.11.2 INSTALLATION PROCEDURE.................................................... 3-42
3.12 1,000-SHEET FINISHER INSTALLATION............................................ 3-44
3.12.1 ACCESSORY CHECK................................................................. 3-44
3.12.2 INSTALLATION PROCEDURE.................................................... 3-45
3.13 3,000-SHEET FINISHER INSTALLATION............................................ 3-48
3.13.1 ACCESSORY CHECK................................................................. 3-48
3.13.2 INSTALLATION PROCEDURE.................................................... 3-49
3.14 PUNCH UNIT INSTALLATION............................................................. 3-52
3.14.1 ACCESSORY CHECK................................................................. 3-52
3.14.2 INSTALLATION PROCEDURE.................................................... 3-53
3.15 PLATEN COVER INSTALLATION........................................................ 3-56
3.16 IMAGE ENHACEMENT KIT (HDD) INSTALLATION............................ 3-57
3.16.1 ACCESSORY CHECK................................................................. 3-57
3.16.2 INSTALLATION PROCEDURE.................................................... 3-58
3.17 ELECTRIC SORT KIT INSTALLATION................................................ 3-60
3.18 KEY COUNTER INSTALLATION ......................................................... 3-61
3.19 ANTI-CONDENSATION HEATER........................................................ 3-63
3.20 TRAY HEATER..................................................................................... 3-65
3.21 TRAY HEATER (OPTIONAL PAPER TRAY UNIT).............................. 3-66
4. SERVICE TABLES......................................................................4-1
4.1 GENERAL CAUTIONS............................................................................. 4-1
4.1.1 DRUM.............................................................................................. 4-1
4.1.2 TRANSFER BELT UNIT .................................................................. 4-2
4.1.3 SCANNER UNIT.............................................................................. 4-2
4.1.4 LASER UNIT.................................................................................... 4-2
4.1.5 CHARGE ROLLER.......................................................................... 4-3
4.1.6 DEVELOPMENT.............................................................................. 4-3
4.1.7 FUSING UNIT.................................................................................. 4-3

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SM A230/A231/A232
4.1.8 PAPER FEED.................................................................................. 4-4
4.1.9 USED TONER ................................................................................. 4-4
4.2 SERVICE PROGRAM MODE................................................................... 4-5
4.2.1 SERVICE PROGRAM MODE OPERATION.................................... 4-5
Service Program Access Procedure .................................................... 4-5
Accessing Copy Mode from within an SP Mode .................................. 4-6
Selecting the Program Number............................................................ 4-6
Inputting a Value or Setting for an SP Mode........................................ 4-6
4.2.2 SERVICE PROGRAM MODE TABLES........................................... 4-7
4.2.3 TEST PATTERN PRINTING (SP2-902)......................................... 4-51
Test Pattern Table (SP2-902-2: Test Pattern Printing – IPU)............. 4-51
Test Pattern Table (SP2-902-3: Test Pattern Printing – Printing)....... 4-51
4.2.4 INPUT CHECK............................................................................... 4-52
Main Machine Input Check (SP5-803) ............................................... 4-52
ADF Input Check (SP6-007) .............................................................. 4-55
4.2.5 OUTPUT CHECK........................................................................... 4-56
Main Machine Output Check (SP5-804)............................................. 4-56
ADF Output Check (SP6-008)............................................................ 4-57
4.2.6 SYSTEM PARAMETER AND DATA LISTS (SMC LISTS)............. 4-57
4.2.7 NIP BAND WIDTH ADJUSTMENT (SP1-109)............................... 4-58
4.2.8 MEMORY ALL CLEAR (SP5-801)................................................. 4-59
4.2.9 SOFTWARE RESET...................................................................... 4-60
4.2.10 SYSTEM SETTING AND COPY SETTING (UP MODE) RESET. 4-60
System Setting Reset......................................................................... 4-60
Copy Setting Reset............................................................................ 4-60
4.3 PROGRAM DOWNLOAD....................................................................... 4-61
Downloading to the BICU................................................................... 4-61
Download from BICU to Flash Memory Card..................................... 4-63
4.4 USER PROGRAM MODE....................................................................... 4-65
4.4.1 HOW TO ENTER AND EXIT UP MODE........................................ 4-65
4.4.2 UP MODE TABLE.......................................................................... 4-65
System Setting Table......................................................................... 4-65
Copy Setting Table............................................................................. 4-66
4.5 TEST POINTS/DIP SWITCHES/LEDS................................................... 4-67
4.5.1 DIP SWITCHES............................................................................. 4-67
4.5.2 TEST POINTS ............................................................................... 4-67
4.5.3 LEDS ............................................................................................. 4-68
4.6 SPECIAL TOOLS AND LUBRICANTS................................................... 4-68
4.6.1 SPECIAL TOOLS........................................................................... 4-68
4.6.2 LUBRICANTS................................................................................ 4-68
5. PREVENTIVE MAINTENANCE SCHEDULE...............................5-1
5.1 PM TABLE................................................................................................ 5-1
6. REPLACEMENT AND ADJUSTMENT........................................6-1
6.1 SCANNER UNIT....................................................................................... 6-1
6.1.1 EXPOSURE GLASS........................................................................ 6-1
6.1.2 SCANNER EXTERIOR/OPERATION PANEL................................. 6-2
6.1.3 LENS BLOCK/SBU ASSEMBLY...................................................... 6-3

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6.1.4 ORIGINAL SIZE SENSORS............................................................ 6-4
6.1.5 EXPOSURE LAMP.......................................................................... 6-5
6.1.6 SCANNER H.P SENSOR/PLATEN COVER SENSOR.................... 6-6
6.1.7 SCANNER MOTOR......................................................................... 6-7
6.1.8 SIB/LAMP STABILIZER................................................................... 6-8
6.1.9 SCANNER WIRE............................................................................. 6-9
6.1.10 SCANNER UNIT POSITIONING ADJUSTMENT......................... 6-12
6.2 LASER UNIT........................................................................................... 6-14
6.2.1 CAUTION DECAL LOCATIONS.................................................... 6-14
6.2.2 LASER UNIT.................................................................................. 6-15
6.2.3 POLYGON MIRROR MOTOR ....................................................... 6-16
6.2.4 LASER SYNCHRONIZATION DETECTOR................................... 6-17
6.2.5 LD UNIT......................................................................................... 6-17
Laser beam pitch adjustment............................................................. 6-18
6.3 PHOTOCONDUCTOR UNIT (PCU)........................................................ 6-19
6.3.1 PCU............................................................................................... 6-19
6.3.2 DRUM............................................................................................ 6-20
6.3.3 PICK-OFF PAWLS......................................................................... 6-21
6.3.4 CHARGE ROLLER/CHARGE ROLLER CLEANING PAD............. 6-22
6.3.5 DRUM CLEANING BLADE............................................................ 6-23
6.3.6 ID SENSOR................................................................................... 6-23
6.4 DEVELOPMENT..................................................................................... 6-24
6.4.1 DEVELOPMENT UNIT .................................................................. 6-24
6.4.2 DEVELOPMENT FILTER .............................................................. 6-25
6.4.3 DEVELOPMENT ROLLER ............................................................ 6-25
6.4.4 DEVELOPER................................................................................. 6-26
6.4.5 TD SENSOR.................................................................................. 6-27
6.5 TRANSFER UNIT................................................................................... 6-28
6.5.1 TRANSFER BELT UNIT ................................................................ 6-28
6.5.2 TRANSFER BELT.......................................................................... 6-29
6.5.3 TRANSFER BELT CLEANING BLADE/TONER OVERFLOW
SENSOR........................................................................................ 6-30
Transfer Belt Cleaning Blade ............................................................. 6-30
Toner Overflow Sensor...................................................................... 6-30
6.5.4 RIGHT COVER.............................................................................. 6-31
6.6 PAPER FEED......................................................................................... 6-32
6.6.1 PICK-UP, SEPARATION, AND FEED ROLLERS.......................... 6-32
6.6.2 LOWER RIGHT COVER/LOWER REAR COVER......................... 6-32
6.6.3 RELAY/UPPER PAPER FEED/LOWER PAPER FEED
CLUTCHES ................................................................................... 6-33
6.6.4 UPPER PAPER FEED UNIT.......................................................... 6-34
6.6.5 LOWER PAPER FEED UNIT......................................................... 6-35
6.6.6 PAPER END/PAPER HEIGHT/RELAY SENSORS ....................... 6-36
6.6.7 REGISTRATION SENSOR............................................................ 6-37
6.7 FUSING.................................................................................................. 6-39
6.7.1 FUSING UNIT................................................................................ 6-39
6.7.2 HOT ROLLER STRIPPERS AND FUSING LAMP......................... 6-40
6.7.3 THERMISTOR AND THERMOFUSE............................................. 6-41
6.7.4 CLEANING ROLLER..................................................................... 6-42

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6.7.5 HOT ROLLER AND PRESSURE ROLLER ....................................6-43
6.8 DRIVE AREA...........................................................................................6-44
6.8.1 REGISTRATION CLUTCH AND TRANSFER BELT CLUTCH .......6-44
6.8.2 MAIN MOTOR ................................................................................6-45
6.8.3 TONER BOTTLE MOTOR..............................................................6-46
6.9 PCBS.......................................................................................................6-47
6.9.1 POWER PACK ...............................................................................6-47
6.9.2 I/O BOARD .....................................................................................6-47
6.9.3 BICU BOARD .................................................................................6-48
6.9.4 PSU ................................................................................................6-49
6.10 HARD DISK...........................................................................................6-50
6.11 COPY ADJUSTMENTS: PRINTING/SCANNING ..................................6-51
6.11.1 PRINTING ....................................................................................6-51
Registration - Leading Edge/Side-to-Side...........................................6-51
Blank Margin.......................................................................................6-52
Main Scan Magnification.....................................................................6-52
Parallelogram Image Adjustment........................................................6-53
6.11.2 SCANNING...................................................................................6-54
Registration: Platen Mode...................................................................6-54
Magnification.......................................................................................6-54
Scanner Skew Image Adjustment.......................................................6-55
6.11.3 ADF IMAGE ADJUSTMENT.........................................................6-56
Registration.........................................................................................6-56
7. TROUBLESHOOTING ................................................................ 7-1
7.1 SERVICE CALL CONDITIONS .................................................................7-1
7.1.1 SUMMARY .......................................................................................7-1
7.1.2 SC CODE DESCRIPTIONS .............................................................7-2
7.2 ELECTRICAL COMPONENT DEFECTS ................................................7-24
7.2.1 SENSORS ......................................................................................7-24
7.2.2 SWITCHES.....................................................................................7-25
7.3 BLOWN FUSE CONDITIONS .................................................................7-26
7.4 ROM HISTORY .......................................................................................7-27
Rev. 09/2000

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A230/A231/A232 SM
PAPER TRAY UNIT A682
1. OVERALL MACHINE INFORMATION........................................8-1
1.1 SPECIFICATIONS.................................................................................... 8-1
1.2 MECHANICAL COMPONENT LAYOUT................................................... 8-2
1.3 ELECTRICAL COMPONENT LAYOUT.................................................... 8-3
1.4 ELECTRICAL COMPONENT DESCRIPTION.......................................... 8-4
1.5 DRIVE LAYOUT ....................................................................................... 8-5
2. DETAILED DESCRIPTIONS .......................................................8-6
2.1 PICK-UP AND SEPARATION ROLLER RELEASE MECHANISM........... 8-6
2.2 PAPER LIFT MECHANISM ...................................................................... 8-7
2.3 PAPER END DETECTION ....................................................................... 8-9
2.4 PAPER HEIGHT DETECTION ............................................................... 8-10
3. SERVICE TABLES....................................................................8-11
3.1 DIP SWITCHES...................................................................................... 8-11
3.2 TEST POINTS........................................................................................ 8-11
3.3 SWITCHES............................................................................................. 8-11
3.4 FUSES.................................................................................................... 8-11
4. REPLACEMENT AND ADJUSTMENT...................................... 8-12
4.1 COVER REPLACEMENT....................................................................... 8-12
Right Cover........................................................................................ 8-12
Rear Cover......................................................................................... 8-12
4.2 ROLLER REPLACEMENT...................................................................... 8-13
4.2.1 PAPER FEED, SEPARATION, AND PICK-UP ROLLERS ............ 8-13
Pick-up Roller..................................................................................... 8-13
Paper Feed Roller.............................................................................. 8-13
Separation Roller ............................................................................... 8-13
4.3 TRAY MOTOR REPLACEMENT............................................................ 8-14
4.4 PAPER FEED AND RELAY CLUTCH REPLACEMENT......................... 8-15
4.5 PAPER FEED UNIT REPLACEMENT.................................................... 8-16
Upper Paper Feed Unit ...................................................................... 8-17
Lower Paper Feed Unit...................................................................... 8-17
4.6 PAPER END, TRAY LIFT, AND RELAY SENSOR
REPLACEMENT..................................................................................... 8-18
Paper End Sensor.............................................................................. 8-18
Tray Lift Sensor.................................................................................. 8-18
Relay Sensor...................................................................................... 8-18
LCT (A683)
1. OVERALL MACHINE INFORMATION........................................9-1
1.1 SPECIFICATIONS.................................................................................... 9-1
1.2 MECHANICAL COMPONENT LAYOUT................................................... 9-2
1.3 ELECTRICAL COMPONENT LAYOUT.................................................... 9-3

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1.4 ELECTRICAL COMPONENT DESCRIPTION.......................................... 9-4
1.5 DRIVE LAYOUT ....................................................................................... 9-5
2. DETAILED DESCRIPTIONS .......................................................9-6
2.1 PAPER FEED MECHANISM.................................................................... 9-6
2.2 TRAY LIFT AND PAPER HEIGHT DETECTION MECHANISM............... 9-7
Tray lifting conditions ........................................................................... 9-7
Tray lowering conditions ...................................................................... 9-7
2.3 TRAY UNIT SLIDE MECHANISM............................................................. 9-8
3. SERVICE TABLES......................................................................9-9
3.1 DIP SWITCHES........................................................................................ 9-9
3.2 TEST POINTS.......................................................................................... 9-9
3.3 SWITCHES............................................................................................... 9-9
3.4 FUSES...................................................................................................... 9-9
4. REPLACEMENT AND ADJUSTMENT...................................... 9-10
4.1 COVER REPLACEMENT....................................................................... 9-10
Tray Cover ......................................................................................... 9-10
Front Cover........................................................................................ 9-10
Rear Cover......................................................................................... 9-10
Right Lower Cover ............................................................................. 9-10
Upper Cover....................................................................................... 9-10
4.2 ROLLER REPLACEMENT...................................................................... 9-11
4.2.1 PAPER FEED, SEPARATION, AND PICK-UP ROLLERS ............ 9-11
Pick-up Roller..................................................................................... 9-11
Paper Feed Roller.............................................................................. 9-11
Separation Roller ............................................................................... 9-11
4.3 TRAY LIFT AND PAPER END SENSOR REPLACEMENT.................... 9-12
Tray Lift Sensor.................................................................................. 9-12
Paper End Sensor.............................................................................. 9-12
4.4 RELAY SENSOR REPLACEMENT........................................................ 9-13
4.5 SIDE FENCE POSITION CHANGE........................................................ 9-14
BY-PASS A689
1 OVERALL MACHINE INFORMATION .......................................10-1
1.1 SPECIFICATIONS.................................................................................. 10-1
1.2 MECHANICAL COMPONENT LAYOUT................................................. 10-2
1.3 ELECTRICAL COMPONENT LAYOUT.................................................. 10-3
1.4 ELECTRICAL COMPONENT DESCRIPTION........................................ 10-3
2 DETAILED DESCRIPTIONS ......................................................10-4
2.1 BASIC OPERATION............................................................................... 10-4
2.2 PAPER SIZE DETECTION..................................................................... 10-5
3 REPLACEMENT AND ADJUSTMENT.......................................10-6

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3.1 COVER REPLACEMENT....................................................................... 10-6
Rear Cover......................................................................................... 10-6
Front Cover........................................................................................ 10-6
Hinge Cover....................................................................................... 10-6
Upper Cover....................................................................................... 10-6
3.2 PAPER FEED AND PICK-UP ROLLER REPLACEMENT...................... 10-7
Paper Feed Roller.............................................................................. 10-7
Pick-up Roller..................................................................................... 10-7
3.3 SEPARATION ROLLER REPLACEMENT.............................................. 10-8
3.4 PAPER END SENSOR AND PICK-UP SOLENOID
REPLACEMENT..................................................................................... 10-9
Paper End Sensor.............................................................................. 10-9
Pick-up Solenoid................................................................................ 10-9
3.5 PAPER SIZE SENSOR BOARD REPLACEMENT............................... 10-10
3.6 BY-PASS TABLE REMOVAL ............................................................... 10-11
3.7 PAPER FEED CLUTCH REPLACEMENT............................................ 10-12
1-BIN TRAY A684
1. OVERALL MACHINE INFORMATION......................................11-1
1.1 SPECIFICATIONS.................................................................................. 11-1
1.2 MECHANICAL COMPONENT AND DRIVE LAYOUT ............................ 11-2
1.3 ELECTRICAL COMPONENT LAYOUT.................................................. 11-3
1.4 ELECTRICAL COMPONENT DESCRIPTION........................................ 11-3
2. DETAILED DESCRIPTIONS .....................................................11-4
2.1 BASIC OPERATION............................................................................... 11-4
3. REPLACEMENT AND ADJUSTMENT......................................11-5
3.1 COVER REMOVAL ................................................................................ 11-5
Front Cover........................................................................................ 11-5
Upper Cover....................................................................................... 11-5
Rear Cover......................................................................................... 11-5
3.2 PAPER SENSOR REPLACEMENT........................................................ 11-6
3.3 ENTRANCE AND PAPER LIMIT SENSOR REPLACEMENT ................ 11-7
Paper Limit Sensor............................................................................. 11-7
Entrance Sensor ................................................................................ 11-7
AUTO DOCUMENT FEEDER A680
1. OVERALL MACHINE INFORMATION......................................12-1
1.1 SPECIFICATIONS.................................................................................. 12-1
1.2 MECHANICAL COMPONENT LAYOUT................................................. 12-2
1.3 ELECTRICAL COMPONENT LAYOUT.................................................. 12-3
1.4 ELECTRICAL COMPONENT DESCRIPTION........................................ 12-4
1.5 DRIVE LAYOUT ..................................................................................... 12-6