Ricoh cattleya Service Manual catt2
CATTLEYA 2
SERVICE MANUAL
!
IMPORTANT SAFETY NOTICES
PREVENTION OF PHYSICAL INJURY
1. Before disassembling or assembling parts of the copier and peripherals,
make sure that the copier power cord is unplugged.
2. The wall outlet should be near the copier and easily accessible.
3. Note that some components of the copier and the paper tray unit are
supplied with electrical voltage even if the main power switch is turned off.
4. If any adjustment or operation check has to be made with exterior covers off
or open while the main switch is turned on, keep hands away from electrified
or mechanically driven components.
5. If the Start key is pressed before the copier completes the warm-up period
(the Start key starts blinking red and green alternatively), keep hands away
from the mechanical and the electrical components as the copier starts
making copies as soon as the warm-up period is completed.
6. The inside and the metal parts of the fusing unit become extremely hot while
the copier is operating. Be careful to avoid touching those components with
your bare hands.
HEALTH SAFETY CONDITIONS
1. Never operate the copier without the ozone filters installed.
2. Always replace the ozone filters with the specified ones at the specified
intervals.
3. Toner and developer are non-toxic, but if you get either of them in your eyes
by accident, it may cause temporary eye discomfort. Try to remove with eye
drops or flush with water as first aid. If unsuccessful, get medical attention.
OBSERVANCE OF ELECTRICAL SAFETY STANDARDS
1. The copier and its peripherals must be installed and maintained by a
customer service representative who has completed the training course on
those models.
2. The NVRAM on the system control board has a lithium battery which can
explode if replaced incorrectly. Replace the NVRAM only with an identical
one. The manufacturer recommends replacing the entire NVRAM. Do not
recharge or burn this battery. Used NVRAM must be handled in accordance
with local regulations.
SAFETY AND ECOLOGICAL NOTES FOR DISPOSAL
1. Do not incinerate toner bottles or used toner. Toner dust may ignite suddenly
when exposed to an open flame.
2. Dispose of used toner, developer, and organic photoconductors in
accordance with local regulations. (These are non-toxic supplies.)
3. Dispose of replaced parts in accordance with local regulations.
3. When keeping used lithium batteries in or der to dispose of them later, do not
put more than 100 batteries per sealed box. Storing larger numbers or not
sealing them apart may lead to chemical reactions and heat build-up.
LASER SAFETY
The Center for Devices and Radiological Health (CDRH) prohibits the repair of
laser-based optical units in the field. The optical housing unit can only be repaired
in a factory or at a location with the requisite equipment. The laser subsystem is
replaceable in the field by a qualified Customer Engineer. The laser chassis is not
repairable in the field. Customer engineers are therefore directed to return all
chassis and laser subsystems to the factory or service depot when replacement of
the optical subsystem is required.
!
WARNING
Use of controls, or adjustment, or performance of procedures other than
those specified in this manual may result in hazardous radiation exposure.
!
WARNING
WARNING: Turn off the main switch before atte mpting any of the
procedures in the Laser Unit section. Laser beams can
seriously damage your eyes.
CAUTION MARKING:
Symbols
This manual uses several symbols. The meaning of those symbols are as follows:
☛
!
"
#
$
%
See or Refer to
Core tech manual
Clip ring
E-ring
Screw
Connector
TABLE OF CONTENTS
1 INSTALLATION PROCEDURES ................................................. 1-1
1.1 INSTALLATION REQUIREMENTS...........................................................1-1
1.1.1 DIMENSIONS...................................................................................1-1
1.1.2 ENVIRONMENT...............................................................................1-2
Environmental Requirements................................................................1-2
Minimum Space Requirements.............................................................1-3
Power Requirements............................................................................1-3
1.2 COPIER.....................................................................................................1-4
1.2.1 ACCESSORY CHECK......................................................................1-4
1.2.2 PREPARATION................................................................................1-5
1.2.3 DEVELOPER INSTALLATION.......................................................1-11
1.2.4 LOADING TONER CARTRIDGES..................................................1-16
1.2.5 FUSING UNIT.................................................................................1-18
1.2.6 DEFAULT SETTINGS AND OPERATION CHECKS......................1-19
1.2.7 HEIGHT ADJUSTMENT.................................................................1-21
1.2.8 COUNTER DISPLAY SETTING.....................................................1-21
1.2.9 RESETTING THE ELECTRONIC TOTAL COUNTER....................1-21
1.2.10 PREPARATION FOR TRANSPORT............................................1-22
1.3 PLATEN COVER (A749-01) ....................................................................1-23
1.3.1 INSTALLATION..............................................................................1-23
1.4 ARDF (A663)...........................................................................................1-24
1.4.1 ACCESSORY CHECK....................................................................1-24
1.4.2 INSTALLATION..............................................................................1-25
1.5 SORTER STAPLER (A831)....................................................................1-26
1.5.1 INSTALLATION..............................................................................1-26
1.6 LCT (A683)..............................................................................................1-31
1.6.1 INSTALLATION..............................................................................1-31
1.7 LCT ADAPTER (A840)............................................................................1-32
1.7.1 INSTALLATION..............................................................................1-32
1.8 EDIT OPTION (B370-01).........................................................................1-38
1.8.1 ACCESSORY CHECK....................................................................1-38
1.8.2 INSTALLATION PROCEDURE......................................................1-39
1.9 CONTROLLER INTERFACE (B371).......................................................1-41
1.9.1 ACCESSORY CHECK....................................................................1-41
1.9.2 INSTALLATION PROCEDURE......................................................1-42
1.10 KEY COUNTER HOLDER.....................................................................1-45
1.11 USER CODE SETTING.........................................................................1-46
2 PREVENTIVE MAINTENANCE.................................................... 2-1
2.1 REGULAR PM ITEMS...............................................................................2-1
2.1.1 REGULAR PM TABLE......................................................................2-1
Peripherals............................................................................................2-4
2.2 PM PROCEDURES...................................................................................2-6
2.2.1 PM-RELATED COUNTERS .............................................................2-6
SP7-803 (PM Counter Display).............................................................2-6
i
2.2.2 REGULAR PREVENTIVE MAINTENANCE FLOW DIAGRAM.........2-9
3 REPLACEMENT AND ADJUSTMENT......................................... 3-1
3.1 GENERAL CAUTION................................................................................3-1
3.2 COVERS AND FILTERS...........................................................................3-1
3.2.1 FRONT DOOR AND LOWER FRONT COVER................................3-1
3.2.2 RIGHT-SIDE FRONT COVER AND RIGHT EDGE COVER............3-2
3.2.3 INNER COVERS..............................................................................3-2
3.2.4 REAR COVERS ...............................................................................3-3
3.2.5 LEFT COVERS.................................................................................3-3
3.2.6 EXPOSURE GLASS.........................................................................3-4
3.2.7 UPPER COVERS.............................................................................3-4
3.2.8 OPERATION PANEL........................................................................3-4
3.2.9 USED TONER TANK........................................................................3-5
3.2.10 CHARGE CORONA FILTER..........................................................3-5
3.2.11 DUST AND OZONE FILTERS........................................................3-6
3.2.12 OPTICS DUST FILTERS................................................................3-7
3.2.13 REVOLVER FILTER.......................................................................3-7
3.2.14 INNER COVER FILTER .................................................................3-7
3.2.15 FUSING UNIT FILTER ...................................................................3-8
3.3 UNIT REMOVAL........................................................................................3-9
3.3.1 REVOLVER/DRUM DRAWER .........................................................3-9
3.3.2 DRUM UNIT REMOVAL.................................................................3-11
3.3.3 REINSTALLING THE REVOLVER/DRUM DRAWER ....................3-12
3.3.4 IMAGE TRANSFER BELT UNIT REMOVAL..................................3-14
Reinstalling the Image Transfer Belt Unit............................................3-15
3.3.5 PAPER TRANSFER UNIT REMOVAL...........................................3-17
3.3.6 REMOVING THE FUSING UNIT....................................................3-18
3.4 SCANNER UNIT......................................................................................3-19
3.4.1 EXPOSURE LAMP REPLACEMENT.............................................3-19
3.4.2 SBU REPLACEMENT....................................................................3-19
3.4.3 SCANNER IPU BOARD REPLACEMENT......................................3-21
3.4.4 SCANNER WIRE/SCANNER MOTOR REPLACEMENT...............3-22
3.4.5 APS SENSORS..............................................................................3-24
3.4.6 SCANNER HP SENSOR................................................................3-24
3.5 LASER OPTICS SECTION .....................................................................3-25
3.5.1 OPENING THE SCANNER UNIT...................................................3-25
3.5.2 POLYGON MIRROR MOTOR REPLACEMENT ............................3-26
3.5.3 LASER SYNCHRONIZING DETECTOR REPLACEMENT............3-27
3.5.4 LD UNIT REPLACEMENT..............................................................3-27
3.5.5 LD PITCH CHECK AND ADJUSTMENT].......................................3-28
3.5.6 LASER ANGLE ADJUSTMENT......................................................3-32
3.5.7 LD CONTROL BOARD REPLACEMENT.......................................3-34
3.6 DRUM UNIT ............................................................................................3-35
3.6.1 DRUM REPLACEMENT.................................................................3-35
Post-replacement Procedure..............................................................3-36
3.6.2 CLEANING BLADE REPLACEMENT.............................................3-37
3.6.3 CLEANING BRUSH REPLACEMENT............................................3-38
3.6.4 LUBRICANT BAR REPLACEMENT...............................................3-38
ii
3.6.5 BIAS ROLLER BLADE REPLACEMENT........................................3-38
3.6.6 CHARGE GRID AND CORONA WIRE AND CLEANER PAD
REPLACEMENT.............................................................................3-39
3.6.7 PCC WIRE REPLACEMENT..........................................................3-39
3.6.8 DRUM POTENTIAL SENSOR REPLACEMENT............................3-40
3.6.9 ID SENSOR REPLACEMENT........................................................3-41
3.7 IMAGE TRANSFER SECTION................................................................3-42
3.7.1 IMAGE TRANSFER BELT REPLACEMENT..................................3-42
3.7.2 TRANSFER BELT LUBRICANT BAR AND LUBRICANT BRUSH
REPLACEMENT.............................................................................3-44
3.7.3 IMAGE TRANSFER BELT BLADE REPLACEMENT .....................3-45
3.7.4 ENTRANCE SEAL GAP ADJUSTMENT........................................3-46
3.7.5 PAPER TRANSFER ROLLER........................................................3-47
PTR Discharge Plate Cleaning...........................................................3-47
PTR Coating Bar and Cleaning Blade Replacement ..........................3-47
Transfer Roller Replacement..............................................................3-47
3.8 DEVELOPMENT UNIT............................................................................3-48
3.8.1 DEVELOPER REPLACEMENT......................................................3-48
Collecting Old Developer....................................................................3-48
Loading New Developer......................................................................3-52
Initialization.........................................................................................3-55
3.8.2 SETTING THE DEVELOPMENT UNIT COLOR............................3-56
3.8.3 CLEANING THE TONER CATCH COVER.....................................3-56
3.8.4 REVOLVER MOTOR REPLACEMENT..........................................3-57
3.8.5 TONER DENSITY SENSOR REPLACEMENT ...............................3-57
3.8.6 TD SENSOR INTERFACE (I/F) BOARD REPLACEMENT ............3-58
3.9 PAPER FEED AND REGISTRATION SECTION.....................................3-59
3.9.1 BY-PASS FEED TABLE REMOVAL...............................................3-59
3.9.2 BY-PASS FEED PAPER WIDTH/PAPER LENGTH/
PAPER END SENSOR REPLACEMENT.......................................3-60
3.9.3 BY-PASS PICK-UP ROLLER REPLACEMENT .............................3-61
3.9.4 BY-PASS FEED ROLLER REPLACEMENT ..................................3-61
3.9.5 BY-PASS SEPARATION ROLLER/
BY-PASS TABLE LIFT MOTOR ASSEMBLY REPLACEMENT.....3-62
3.9.6 BY-PASS PAPER FEED UNIT REMOVAL.....................................3-62
3.9.7 BY-PASS PAPER FEED UNIT INSTALLATION.............................3-63
3.9.8 REGISTRATION SENSOR REPLACEMENT.................................3-65
3.9.9 PAPER DUST CATCHING MYLAR CLEANING ............................3-65
3.9.10 PAPER TRAY ROLLER REPLACEMENT....................................3-66
3.9.11 PAPER FEED UNIT AND PAPER FEED CLUTCH
REPLACEMENT...........................................................................3-67
3.9.12 COPY IMAGE AREA ADJUSTMENT...........................................3-69
3.10 PAPER TRANSPORT, FUSING, AND PAPER EXIT............................3-71
3.10.1 TRANSPORT UNIT REMOVAL....................................................3-71
3.10.2 FUSING UNIT TOP COVER REMOVAL......................................3-71
3.10.3 OIL SUPPLY UNIT REPLACEMENT AND CLEANING................3-72
3.10.4 HOT ROLLER BLADE REPLACEMENT......................................3-73
3.10.5 HOT ROLLER SEPARATION PAWL CLEANING ........................3-74
iii
3.10.6 CLEANING THE CLEANING ROLLER SCRAPER AND
PRE-CLEANING ROLLER REPLACEMENT................................3-74
3.10.7 FUSING THERMOFUSE AND THERMISTOR
REPLACEMENT...........................................................................3-75
3.10.8 OIL TANK REMOVAL...................................................................3-75
3.10.9 FUSING UNIT DISASSEMBLY.....................................................3-76
3.10.10 FUSING LAMP REPLACEMENT................................................3-77
3.10.11 HOT ROLLER REPLACEMENT.................................................3-77
3.10.12 CLEANING THE HOT ROLLER CLEANING ROLLER...............3-78
3.10.13 PRESSURE ROLLER LAMP/ROLLER REPLACEMENT...........3-78
3.10.14 PRESSURE THERMOFUSE AND THERMISTOR
REPLACEMENT.........................................................................3-79
3.10.15 CLEANING THE PRESSURE CLEANING ROLLER..................3-79
3.10.16 PRESSURE ROLLER BLADE CLEANING
(230 V MACHINES ONLY) .........................................................3-80
3.10.17 PRESSURE ROLLER OIL SUPPLY PAD REPLACEMENT
(230 V MACHINES ONLY) .........................................................3-80
3.10.18 NIP BAND WIDTH ADJUSTMENT.............................................3-82
3.10.19 CAUTIONS TO BE TAKEN WHEN USING A FUSING UNIT
THAT HAS BEEN IN STOCK FOR A LONG PERIOD................3-83
3.11 DUPLEX UNIT.......................................................................................3-84
3.11.1 DUPLEX UNIT REMOVAL ...........................................................3-84
3.11.2 SEPARATION ROLLER REPLACEMENT ...................................3-84
3.11.3 FEED ROLLER REPLACEMENT.................................................3-85
3.11.4 DUPLEX FEED MOTOR REPLACEMENT...................................3-86
3.12 SYSTEM AND ELECTRONICS.............................................................3-88
3.12.1 SOFTWARE UPDATE USING AN IC CARD................................3-88
Care of the IC Card.............................................................................3-88
Upgrading the Main Control Board Software ......................................3-88
Upgrading the Scanner IPU Software.................................................3-89
NV-RAM Uploading and Downloading................................................3-90
Upload/download procedur e...............................................................3-90
3.12.2 RAM CLEAR.................................................................................3-91
RAM Clear Procedure.........................................................................3-91
3.12.3 MAIN CONTROL BOARD ............................................................3-92
Main Control Board Replacement Procedure .....................................3-92
3.12.4 COUNTERS .................................................................................3-93
About the Total Counter......................................................................3-93
Mechanical Counter............................................................................3-93
NV-RAM Replacement Procedure......................................................3-93
3.12.5 TOUCH PANEL CALIBRATION...................................................3-94
3.12.6 DOOR SAFETY SWITCH LOCK TOOLS.....................................3-95
4 TROUBLESHOOTING ................................................................. 4-1
4.1 PROCESS CONTROL ERROR CONDITIONS.........................................4-1
4.1.1 PROCESS CONTROL SELF CHECK RESULTS (SP3-975-00)......4-1
4.1.2 DEVELOPER SETUP RESULTS (SP3-964-00)...............................4-2
“Developer Agitation (SP2-225)” Operation Flow..................................4-3
4.1.3 TD SENSOR INITIALIZATION RESULTS (SP3-005-006)................4-3
iv
How to Avoid the Abnormal TD Sensor Initialization.............................4-4
Countermeasure...................................................................................4-4
Action in the Field.................................................................................4-5
4.1.4 TONER SCATTERING.....................................................................4-6
4.1.5 SELF-CHECK PROCESS CONTROL RELATED SC’s....................4-7
SC385: VSG Adjustment Error..............................................................4-7
Other Self-check Process Control Related SC’s...................................4-7
4.2 DRUM LIGHT FATIGUE............................................................................4-8
4.3 ANTI-CONDENSATION HEATERS ..........................................................4-9
Condition...............................................................................................4-9
4.4 JITTER IN THICK OR EXTRA THICK PAPER MODE............................4-10
4.5 SC CODE TABLE....................................................................................4-11
4.5.1 SC TYPES AND RESETTING PROCEDURES..............................4-11
SC CODE TABLE...............................................................................4-12
5 SERVICE TABLES....................................................................... 5-1
5.1 SERVICE PROGRAM (SP) MODES.........................................................5-1
5.1.1 HOW TO ENTER AN SP MODE......................................................5-1
How to make copies from SP mode:.....................................................5-1
Pop-up Screen......................................................................................5-2
5.1.2 SP MODE TYPES............................................................................5-3
5.1.3 SERVICE PROGRAM MODE TABLES............................................5-3
SP1-XXX (Feed)...................................................................................5-4
SP2-XXX (Drum)...................................................................................5-7
SP3-XXX (Process Control)................................................................5-20
SP4-XXX (Scanner Unit).....................................................................5-24
SP5-XXX (Opera tio n Modes/System).................................................5-30
SP6-XXX (Peripherals).......................................................................5-34
SP7-XXX (Logging Data)....................................................................5-35
SP8-XXX (Special Mode)....................................................................5-37
5.1.4 POP-UP SCREEN..........................................................................5-42
SCREEN-A (1/2).................................................................................5-42
SCREEN-A (2/2).................................................................................5-42
SCREEN-B.........................................................................................5-43
SCREEN-C.........................................................................................5-43
SCREEN-D.........................................................................................5-44
SCREEN-E.........................................................................................5-44
SCREEN-F .........................................................................................5-45
SCREEN-G.........................................................................................5-45
SCREEN-H (1/2).................................................................................5-46
SCREEN-H (2/2).................................................................................5-46
SCREEN-I...........................................................................................5-47
SCREEN-J..........................................................................................5-47
SCREEN-K (1/6).................................................................................5-48
SCREEN-K (2/6).................................................................................5-48
SCREEN-K (3/6).................................................................................5-49
SCREEN-K (4/6).................................................................................5-49
SCREEN-K (5/6).................................................................................5-50
SCREEN-K (6/6).................................................................................5-50
v
5.1.5 SP4-301 APS OPERATION CHECK DETAILS.............................. 5-51
5.1.6 TEST PATTERN.............................................................................5-52
IPU Test Pattern (SP4-417)................................................................5-52
LD Control Board Test Pattern (SP4-907) ..........................................5-52
5.1.7 SP5-803 INPUT CHECK................................................................5-53
COPIER..............................................................................................5-53
LCT.....................................................................................................5-54
SORTER.............................................................................................5-55
ADF.....................................................................................................5-55
5.1.8 SP5-804 OUTPUT CHECK ............................................................5-56
COPIER..............................................................................................5-56
OPTIONS (SORTER, ADF)................................................................5-57
5.1.9 SP5-955 PRINTER INTERNAL PATTERN.....................................5-58
5-955-018: Internal Pattern Ty pes......................................................5-58
5.2 USER TOOLS.........................................................................................5-58
5.2.1 HOW TO ENTER USER TOOLS....................................................5-58
5.2.2 DETAILED DESCRIPTION OF USER TOOLS...............................5-58
5.3 TP/SW/LED/FUSE...................................................................................5-59
5.3.1 MAIN CONTROL BOARD TEST PINS...........................................5-59
5.3.2 LD MAIN CONTROL BOARD TEST PINS..................................... 5-60
5.3.3 I/O CONTROL BOARD TEST PINS...............................................5-60
5.3.4 FUSE SPECIFICATIONS...............................................................5-65
5.3.5 LED/SW SPECIFICATIONS OF SCANNER IPU BOARD..............5-66
LED Specifications..............................................................................5-66
SW Specifications...............................................................................5-66
6 DETAILED SECTION DESCRIPTIONS ....................................... 6-1
6.1 MECHANISM OVERVIEW........................................................................6-1
6.1.1 IMAGE GENERATION PROCESS...................................................6-1
6.1.2 MAJOR UNITS AND PAPER PATH.................................................6-3
6.2 PARTS LAYOUT.......................................................................................6-4
6.2.1 MAJOR UNIT LAYOUT DIAGRAM...................................................6-4
6.3 DRIVE LAYOUT........................................................................................6-5
6.4 AIR FLOW.................................................................................................6-6
6.4.1 AIR FLOW SYSTEM 1......................................................................6-6
6.4.2 AIR FLOW SYSTEM 2......................................................................6-7
6.5 PROCESS CONTROL ..............................................................................6-8
6.5.1 OVERVIEW......................................................................................6-8
6.5.2 POTENTIAL CONTROL.................................................................6-10
Overview............................................................................................. 6-10
Potential Control Timing......................................................................6-10
6.5.3 PROCESS CONTROL SELF-CHECK OPERATION FLOW...........6-12
Step 1: VSG Adjustment......................................................................6-13
Step 2: Generating ID Sensor Patch Patterns....................................6-13
Step 3: Sensor Pattern Potential Detection.........................................6-14
Step 4: Sensor Pattern Density Detection...........................................6-15
Step 5: Toner Amount Calculation......................................................6-17
Step 6: Development Potential Calculation.........................................6-17
Step 7: Selecting the Optimum VD, VB, VL.........................................6-18
vi
6.5.4 PROCESS CONTROL γ CORRECTION........................................6-19
What is process control γ?..................................................................6-19
How is it done?...................................................................................6-19
Process Control γ Correction Timing...................................................6-20
Relationship Between Process Control γ Correction, ACC, and
Other γ Corrections.............................................................................6-20
6.5.5 TONER SUPPLY CONTROL .........................................................6-21
Toner Supply Control Modes..............................................................6-21
TD Sensor Output...............................................................................6-22
Detecting VSP for Toner Supply Control .............................................6-22
Calculating the Amount of Toner on the Drum....................................6-23
Summery of Toner Supply Control......................................................6-23
6.6 DRUM UNIT ............................................................................................6-24
6.6.1 MAJOR COMPONENTS ................................................................6-24
6.6.2 DRUM UNIT DRIVE........................................................................6-25
Drum Drive..........................................................................................6-25
Cleaning Drive....................................................................................6-25
6.6.3 CHARGE CORONA UNIT..............................................................6-26
6.6.4 CHARGE CORONA UNIT CLEANER............................................ 6-27
Drive ...................................................................................................6-27
Cleaning Conditions............................................................................6-27
Related SP modes..............................................................................6-27
Home Position ....................................................................................6-27
Cleaning Path (front → rear → front)..................................................6-27
Position Detection...............................................................................6-27
6.6.5 CLEANING MECHANISM ..............................................................6-28
Cleaning.............................................................................................. 6-28
Lubricant.............................................................................................6-28
6.6.6 PRE-CLEANING CORONA (PCC).................................................6-28
6.6.7 QUENCHING..................................................................................6-29
6.6.8 CARRIER CATCHER.....................................................................6-29
6.7 SCANNER UNIT......................................................................................6-30
6.7.1 OVERVIEW....................................................................................6-30
6.7.2 SCANNER......................................................................................6-31
First Scanner ......................................................................................6-31
Exposure Lamp...................................................................................6-31
Mirrors.................................................................................................6-31
6.7.3 SCANNER DRIVE..........................................................................6-32
Full Size mode....................................................................................6-32
Reduction/Enlargement modes...........................................................6-32
6.7.4 COLOR CCD..................................................................................6-33
6.7.5 WHITE PLATE SCANNING............................................................6-34
6.7.6 SCANNER IPU...............................................................................6-34
6.7.7 ORIGINAL SIZE DETECTION........................................................6-35
6.7.8 OTHERS.........................................................................................6-37
Anti-condensation Heater ...................................................................6-37
Fans ....................................................................................................6-37
6.8 IMAGE PROCESSING............................................................................6-38
vii
6.8.1 OVERVIEW....................................................................................6-38
6.8.2 SCANNER SECTION BLOCK DIAGRAM......................................6-39
6.8.3 SCANNER FUNCTIONS................................................................6-40
Photoelectric Conversion....................................................................6-40
Signal Processing (Analog ASIC).......................................................6-40
A/D Conversion...................................................................................6-40
Shading Compensation Circuit ...........................................................6-41
D/A Conversion...................................................................................6-42
Scan Line Correction Circuit...............................................................6-42
6.8.4 IPU SECTION BLOCK DIAGRAM..................................................6-43
6.8.5 IPU FUNCTIONS............................................................................6-44
Scanner γ Conversion and Picture Element Correction......................6-44
ACS (Auto Color Selection)................................................................6-46
Automatic Original Type Selection......................................................6-47
Image Separation ...............................................................................6-48
Filtering and Color Conversion ...........................................................6-49
Image Creation...................................................................................6-54
Gradation Processing.........................................................................6-56
Area Manipulation Functions ..............................................................6-59
CPU....................................................................................................6-59
IPU Board Test...................................................................................6-59
6.9 LASER EXPOSURE................................................................................6-60
6.9.1 OVERVIEW....................................................................................6-60
6.9.2 LD UNIT..........................................................................................6-61
LD Safety Switch.................................................................................6-61
LD Unit Configuration..........................................................................6-62
Auto Power Control (APC)..................................................................6-63
6.9.3 LASER OPTICS SYSTEM..............................................................6-64
Cylindrical Lens ..................................................................................6-64
Polygon Mirror.....................................................................................6-64
fθ Lenses and the BTL........................................................................6-65
Laser Synchronization Mechanism.....................................................6-65
Laser Exposure Control......................................................................6-66
Multibeam Laser Exposure.................................................................6-67
Laser Diode Control Board Functions .................................................6-67
6.10 DEVELOPMENT UNIT..........................................................................6-68
6.10.1 OVERVIEW..................................................................................6-68
6.10.2 REVOLVER MECHANISM...........................................................6-69
Revolver Drive....................................................................................6-70
Revolver Home Position Detection .....................................................6-71
6.10.3 DEVELOPMENT MECHANISM....................................................6-72
Development.......................................................................................6-72
Magnetic Doctor Blade........................................................................6-72
Narrow Gap Development..................................................................6-72
6.10.4 DEVELOPMENT DRIVE...............................................................6-73
6.10.5 DEVELOPER AGITATION...........................................................6-73
6.10.6 TONER AGITATION.....................................................................6-74
6.10.7 DEVELOPMENT BIAS.................................................................6-74
6.10.8 TONER SUPPLY MECHANISM...................................................6-75
viii
6.10.9 TONER BLOCKING MECHANISM...............................................6-76
6.10.10 TONER CARTRIDGE DETECTION...........................................6-77
6.10.11 TONER CARTRIDGE SHUTTER LOCK PIN .............................6-77
6.10.12 INCORRECT TONER INSTALLATION PREVENTION..............6-77
6.10.13 TONER END SENSOR ..............................................................6-78
Sensor ................................................................................................6-78
Toner Near End/Toner End Detection ................................................6-78
6.10.14 TONER END RECOVERY .........................................................6-80
6.10.15 TONER LOOSENING.................................................................6-81
6.10.16 REVOLVER LOCK MECHANISM...............................................6-82
6.11 TRANSFER SYSTEM ...........................................................................6-83
6.11.1 OVERVIEW..................................................................................6-83
6.11.2 IMAGE TRANSFER BELT SECTION...........................................6-84
Image Transfer Belt Drive Mechanism................................................6-84
Belt Tension Release Mechanism ......................................................6-85
Image Transfer Belt Bias....................................................................6-86
Error Codes ........................................................................................6-87
Belt Mark Sensor................................................................................6-87
Belt Pressure Release Mechanism.....................................................6-87
Belt Cleaning Mechanism...................................................................6-88
Cleaning Vacuum ...............................................................................6-90
Toner Collection Mechanism ..............................................................6-90
6.11.3 PAPER TRANSFER MECHANISM..............................................6-91
Paper Transfer Roller Unit Contact/Release Mechanism....................6-91
Paper Transfer Roller Cleaning ..........................................................6-92
Paper Transfer Roller and Transport Belts Drive................................6-93
Paper Transfer Bias............................................................................6-94
6.11.4 PAPER SEPARATION MECHANISM...........................................6-96
6.12 PAPER FEED AND REGISTRATION SECTION...................................6-97
6.12.1 MAJOR COMPONENTS ..............................................................6-97
Diagram..............................................................................................6-97
6.12.2 PAPER TRAY SECTION..............................................................6-98
Paper Feed/Separation Mechanism ...................................................6-98
Reverse Roller Release Mechanism...................................................6-98
Paper Feed Operation........................................................................6-98
Paper Lift Mechanism.........................................................................6-99
Paper End Detection.........................................................................6-100
Paper Near End Detection................................................................6-100
6.12.3 BY-PASS PAPER FEED SECTION............................................6-101
By-pass Feed Table..........................................................................6-101
By-pass Feed Unit............................................................................6-101
By-pass Paper End Sensor...............................................................6-101
By-pass Feed Table Lift Mechanism.................................................6-102
By-pass Pick-up Roller Pressure......................................................6-102
6.12.4 PAPER FEED DRIVE.................................................................6-103
Tray Feed Unit Drive.........................................................................6-103
Registration Roller Drive...................................................................6-103
By-pass Feed Unit Drive................................................................... 6-104
6.12.5 PAPER DUST CATCHING.........................................................6-104
ix
6.12.6 PAPER FEEDING SPEED......................................................... 6-105
6.12.7 PAPER PATH.............................................................................6-105
Dipping Up-hill Paper Path................................................................ 6-105
6.13 TRANSPORT, FUSING, AND EXIT ....................................................6-106
6.13.1 MAJOR COMPONENTS ............................................................6-106
6.13.2 DRIVE MECHANISM..................................................................6-107
6.13.3 FUSING UNIT OVERVIEW ........................................................6-107
6.13.4 FUSING TEMPERATURE CONTROL........................................6-108
6.13.5 FUSING PRESSURE.................................................................6-108
6.13.6 OIL SUPPLY...............................................................................6-109
6.13.7 CLEANING MECHANISM ..........................................................6-110
6.13.8 FUSING OIL RECYCLING MECHANISM...................................6-111
6.13.9 HOT ROLLER SEPARATION PAWL..........................................6-111
6.13.10 PAPER EXIT AND PAPER INVERSION..................................6-112
Paper Exit Mechanism......................................................................6-112
Junction Gate Mechanism................................................................6-112
Paper Exit Cover...............................................................................6-112
6.14 DUPLEX TRAY....................................................................................6-113
6.14.1 OVERVIEW................................................................................6-113
6.14.2 DRIVE MECHANISM..................................................................6-114
6.14.3 PAPER FEED INTO THE DUPLEX TRAY .................................6-115
Duplex Stacking................................................................................6-115
Paper Feed from the Duplex Tray.....................................................6-116
Duplex Entrance to Duplex Tray.......................................................6-117
6.14.4 JOGGER MECHANISM..............................................................6-118
6.14.5 PAPER FEED FROM THE DUPLEX TRAY ...............................6-119
Bottom Plate Lift Mechanism............................................................6-119
6.14.6 PAPER FEED-OUT MECHANISM.............................................6-120
6.15 SYSTEM CONFIGURATION...............................................................6-121
6.15.1 CONFIGURATION......................................................................6-121
6.15.2 POWER STATES.......................................................................6-122
Energy Saver Mode..........................................................................6-122
Power-off (Sleep) State (AOF Mode)................................................6-122
Main Power Switch Off State............................................................6-122
Copier Modes ...................................................................................6-123
6.15.3 OPERATION PANEL..................................................................6-124
6.15.4 PRINTER CONTROLLER INTERFACE.....................................6-125
SPECIFICATIONS.....................................................................SPEC-1
1. MAJOR UNITS....................................................................................SPEC-1
B023 Copier:.................................................................................SPEC-1
2. BASIC SPECIFICATIONS...................................................................SPEC-2
3. PLATEN/ARDF ORIGINAL SIZE DETECTION...................................SPEC-7
4. COPY PAPER SIZES..........................................................................SPEC-8
5. NOISE EMISSION...............................................................................SPEC-9
6. POWER CONSUMPTION...................................................................SPEC-9
x
PERIPHERALS
ARDF (A663)
1 SPECIFICATIONS..................................................................A663-1
2 COMPONENT LAYOUT.........................................................A663-2
2.1 MECHANICAL COMPONENTS ......................................................... A663-2
2.2 ELECTRICAL COMPONENTS........................................................... A663-3
3 ELECTRICAL COMPONENT DESCRIPTION........................A663-4
4 DETAILED DESCRIPTIONS..................................................A663-5
4.1 ORIGINAL PICK-UP MECHANISM.................................................... A663-5
4.2 SEPARATION AND PAPER FEED MECHANISM ............................. A663-6
4.3 FRICTION BELT DRIVE MECHANISM.............................................. A663-7
4.4 ORIGINAL SIZE DETECTION............................................................ A663-8
4.5 PAPER TRANSPORT MECHANISM ................................................. A663-9
4.6 THICK/THIN ORIGINAL MODES..................................................... A663-10
4.7 ORIGINAL FEED-OUT MECHANISM.............................................. A663-11
4.8 TWO-SIDED ORIGINAL FEED MECHANISM..................................A663-12
5 TIMING CHARTS.................................................................A663-13
5.1 A4 SIDEWAYS: 1 SIDED ORIGINAL............................................... A663-13
5.2 COMBINE 2 ORIGINAL MODE........................................................ A663-14
5.3 A4 SIDEWAYS: DUPLEX................................................................. A663-15
6 SERVICE TABLES...............................................................A663-16
6.1 DIP SWITCHES................................................................................ A663-16
6.2 VARIABLE RESISTORS.................................................................. A663-17
6.3 LED .................................................................................................. A663-17
6.4 FUSE................................................................................................ A663-17
7 REPLACEMENT AND ADJUSTMENT.................................A663-18
7.1 TRANSPORT BELT REPLACEMENT.............................................. A663-18
7.2 FEED ROLLER REPLACEMENT..................................................... A663-19
7.3 FRICTION BELT REPLACEMENT................................................... A663-20
7.4 ORIGINAL SET AND WIDTH SENSOR REPLACEMENT ............... A663-21
7.5 VERTICAL REGISTRATION ADJUSTMENT...................................A663-22
7.5.1 ONE SIDED THIN ORIGINAL MODE...................................... A663-22
7.5.2 TWO SIDED ORIGINAL MODE .............................................. A663-23
7.6 SIDE-TO-SIDE REGISTRATION (DF POSITIONING)
ADJUSTMENT ................................................................................. A663-24
xi
SORTER STAPLER (A831)
1 OVERALL MAHCINE INFORMATION...................................A831-1
1.1 SPECIFICATIONS.............................................................................. A831-1
1.2 COMPONENT LAYOUT..................................................................... A831-3
1.2.1 MECHANICAL COMPONENT LAYOUT.................................... A831-3
1.2.2 DRIVE LAYOUT........................................................................ A831-4
2 DETAILED DESCRIPTION ....................................................A831-5
2.1 BASIC OPERATION........................................................................... A831-5
2.1.1 NORMAL (PROOF MODE) AND SORT/STACK MODE........... A831-5
Normal (Proof) Mode (From the Turn Gate Section to
the Proof Tray)............................................................................... A831-5
Sort Mode (From the Turn Gate Section to the Bins)..................... A831-6
Stack Mode (From the Turn Gate Section to the Bins).................. A831-7
Reverse Mode (From the Turn Gate Section to the Bins).............. A831-8
2.1.2 STAPLE MODE.........................................................................A831-9
2.2 TURN GATE SECTION.................................................................... A831-11
2.3 BIN DRIVE MECHANISM................................................................. A831-12
2.4 BIN HOME POSITION...................................................................... A831-13
2.5 JOGGER SECTION ......................................................................... A831-14
2.6 BIN REAR PLATE DRIVE SECTION ............................................... A831-15
2.7 GRIP ASSEMBLY............................................................................ A831-16
2.7.1 GRIP MOTOR ......................................................................... A831-17
2.7.2 GRIP SHIFT MOTOR.............................................................. A831-18
2.8 STAPLE UNIT.................................................................................. A831-19
2.8.1 STAPLE UNIT DRIVE MECHANISM....................................... A831-19
2.8.2 STAPLER................................................................................ A831-20
Staple Prohibit Conditions............................................................ A831-21
2.8.3 STAPLE UNIT PULLED-OUT MECHANISM........................... A831-22
3 REPLACEMENTS AND ADJUSTMENTS............................A831-23
3.1 EXTERIOR COVER REMOVAL....................................................... A831-23
3.2 STAPLER REMOVAL AND REINSTALLATION............................... A831-24
3.3 JOGGER PLATE REMOVAL AND INSTALLATION......................... A831-25
Removal....................................................................................... A831-25
Installation.................................................................................... A831-25
3.4 BINS REMOVAL............................................................................... A831-26
Removal....................................................................................... A831-26
Installation.................................................................................... A831-28
3.5 MAIN MOTOR REMOVAL................................................................ A831-30
3.6 GRIP ASSEMBLY REMOVAL.......................................................... A831-31
3.7 UPPER GRIP ASSEMBLY REMOVAL............................................. A831-32
3.8 GRIP SHIFT MOTOR REMOVAL.....................................................A831-33
3.9 HELICAL WHEELS REMOVAL........................................................ A831-34
Removal....................................................................................... A831-34
Front Helical Wheel...................................................................... A831-34
Rear Helical Wheel...................................................................... A831-35
xii
Installation.................................................................................... A831-36
Rear Helical Wheel...................................................................... A831-36
Front Helical Wheel...................................................................... A831-37
Alignment of the 2 Helical Wheels ............................................... A831-38
3.10 GRIP MOTOR AND SENSORS REMOVAL................................... A831-39
3.10.1 GRIP MOTOR/GRIP MOTOR HP SENSOR/GRIP SHIFT MOTOR
HP SENSOR REMOVAL................................................................... A831-39
3.11 MAIN CONTROL BOARD REPLACEMENT................................... A831-40
4 SP MODE AND STAPLE POSITION ADJUSTMENT ..........A831-41
4.1 SERVICE TABLES (MAIN CONTROL BOARD)...............................A831-41
4.1.1 DIP SWITCHES....................................................................... A831-41
DIP 1 (Mode) SP Mode................................................................ A831-41
DIP 2 (Staple) Staple Position Adjustment (A)............................. A831-41
DIP 3 (Chuck) Staple Position Adjustment (B)............................. A831-41
LCT (A683)
1 OVERALL MACHINE INFORMATION...................................A683-1
1.1 SPECIFICATIONS.............................................................................. A683-1
1.2 MECHANICAL COMPONENT LAYOUT ............................................ A683-2
1.3 ELECTRICAL COMPONENT LAYOUT.............................................. A683-3
1.4 ELECTRICAL COMPONENT DESCRIPTION.................................... A683-4
1.5 DRIVE LAYOUT................................................................................. A683-5
2 DETAILED DESCRIPTIONS..................................................A683-6
2.1 PAPER FEED MECHANISM.............................................................. A683-6
2.2 TRAY LIFT AND PAPER HEIGHT DETECTION MECHANISM.........A683-7
Tray lifting conditions.....................................................................A683-7
Tray lowering conditions................................................................ A683-7
2.3 TRAY UNIT SLIDE MECHANISM ...................................................... A683-8
3 SERVICE TABLES.................................................................A683-9
3.1 DIP SWITCHES.................................................................................. A683-9
3.2 TEST POINTS.................................................................................... A683-9
3.3 SWITCHES......................................................................................... A683-9
3.4 FUSES ............................................................................................... A683-9
4 REPLACEMENT AND ADJUSTMENT.................................A683-10
4.1 COVER REPLACEMENT................................................................. A683-10
Tray Cover................................................................................... A683-10
Front Cover.................................................................................. A683-10
Rear Cover .................................................................................. A683-10
Right Lower Cover....................................................................... A683-10
Upper Cover ................................................................................ A683-10
4.2 ROLLER REPLACEMENT............................................................... A683-11
xiii
4.2.1 PAPER FEED, SEPARATION, AND PICK-UP ROLLERS...... A683-11
Pick-up Roller .............................................................................. A683-11
Paper Feed Roller........................................................................ A683-11
Separation Roller......................................................................... A683-11
4.3 TRAY LIFT AND PAPER END SENSOR REPLACEMENT ............. A683-12
Tray Lift Sensor ........................................................................... A683-12
Paper End Sensor ....................................................................... A683-12
4.4 RELAY SENSOR REPLACEMENT.................................................. A683-13
4.5 SIDE FENCE POSITION CHANGE................................................... A683-14
xiv
26 January, 2001 INSTALLATION REQUIREMENTS
1. INSTALLATION PROCEDURES
1.1 INSTALLATION REQUIREMENTS
1.1.1 DIMENSIONS
!
CAUTION
Rating voltage for Peripherals
Remote Diagnostic System
Rating voltage output connector
for accessory Max. DC5 V
Installation
ARDF
Rating voltage output connector
for accessory Max. DC24 V
LCT
Rating voltage output connector
for accessory Max. DC24 V
SORTER
Rating voltage output connector
for accessory Max. DC24 V
B023I921.WMF
1-1
INSTALLATION REQUIREMENTS 26 January, 2001
1.1.2 ENVIRONMENT
To ensure the optimum copy quality, the following environmental requirements
need to be observed. When installing this copier at the customer site, make sure
that the location meets the followi ng req uir ements.
Environmental Requirements
1. Avoid an area which is exposed to direct sunlight or is excessively illuminated
(the illumination should not exceed 2,000 lux).
2. Avoid an area which is too hot and humid or too cold and dry.
Standard temperature range: 10°C to 32°C
Standard humidity range: 15% to 80%
Limit of high temperature and humidity: 32°C/54% or 27°C/80%
3. Avoid an area near fire or heat.
4. Avoid an area which is exposed to sudden temperature changes. This includes
areas where the machine will not be directly exposed to:
1) Cool air from an air conditioner
2) Heat from a heater.
5. Avoid a dusty area (maximum allowable amount of dust: 0.15 mg/m3).
6. Avoid a poor-ventilated area (required minimum ventilation: 30 m3/hr/man
7. Do not place the machine where it will be expos ed to corrosive gases.
8. Place the machine on a level floor (the inclination on any side should be no
more than 5 mm).
9. Do not place the machine where it may be subjected to strong vibrations.
10. Do not install the machine at any location over 2,000 m (6,500 feet) above sea
level.
11. If the machine is installed close to other electronic equipment, they may
interfere with each other. To avoid this problem:
1) Keep the machine as far away as possible from television sets or radios.
2) Reorient the receiving antenna of television sets and radios as needed.
3) Use a separate outlet for the machine.
!
CAUTION
1. Do not install the machine in a very humid or dusty area.
2. Do not install the machine on a shaky or inclined floor.
1-2
26 January, 2001 INSTALLATION REQUIREMENTS
Minimum Space Requirements
Provide clearance for the copier, as shown below. If one or more options (such as
the ARDF or sorter stapler) are added to the copier, this clearance should be
provided around the entire system.
Installation
B023I157.WMF
NOTE: A space of at least 100 mm (4.0") at the rear of the machine is important
for machine ventilation.
Power Requireme nts
!
WARNING
1. Install the machine as close to the outlet as possible. Firmly plug in the
machine after installation.
2. Avoid multi-wiring.
3. The power cord should be placed where it cannot be stepped on or
flattened by the machine. When installing the machine, route the power
cord out of the way of general traffic.
4. Be sure to connect the power cord’s grounding wire.
1. Input voltage level:
120 V, 60 Hz: More than 16 A (North America)
220 V to 240 V, 50 Hz: More than 8 A (Europe, Middle Ease)
220 V to 240 V, 50/60 Hz: More than 8 A (Asia)
2. Permissible voltage fluctuation: ±10%
3. Do not set anything on the power cord.
1-3
COPIER 26 January, 2001
1.2 COPIER
1.2.1 ACCESSORY CHECK
Description Qty
1. Operating Instructions Quick Reference................................1
2. Operating Instructions Manual...............................................1
3. Copy Tray..............................................................................1
4. Tray Size Decal.....................................................................1
5. Image Samples .....................................................................1
6. Factory Data Sheet ...............................................................1
1-4
26 January, 2001 COPIER
1.2.2 PREPARATION
1. Remove the strips of filament tape shown
in the figures to the right.
B023I101.WMF
Installation
2. Pull out the duplex tray and remove the
protectors [A] from the metal rollers.
3. Peel off the two strips of filament tape [B]
and remove the protective sheet [C].
4. Lift the lower guide plate [D] and take out
the protective sheet.
[A]
[B]
B023I154.WMF
[D]
[C]
1-5
B023I152.WMF
COPIER 26 January, 2001
5. Open the front door and remove the
revolver cover [A] (4 screws).
[A]
B023I102.WMF
[C]
6. Loosen the screw [B] (don’t remove) then
remove the fusing/transfer drawer clamp
[C].
NOTE: Keep the fusing/transfer drawer
clamp in a safe location as it will
be reused when relocating the
copier.
Part No.: A2691115
7. Tighten screw [B] again.
[B]
B023I140.WMF
1-6
26 January, 2001 COPIER
8. Remove the charge corona unit [A] (1
snap ring and 1 connector).
9. Remove the pre-cleaning corona unit
[B] (1 screw).
[A]
Installation
10. Remove the transfer faceplate [C] (3
long screws, 1 knob, 1 connector, and
2 clamps).
11. Remove the image transfer belt cleaning
unit [D].
NOTE: 1) When removin g and
reinstalling the image
transfer belt cleaning unit
during servicing, please do
so while holding the
positioning pin [E].
2) Do not hold the entrance
seal release lever [F]. If the
lever is held, it will move and
the gap will fall out of the
adjustment range. This will
cause the problems. (☛
3.7.4)
3) The screw [G] that fastens
the entrance seal release
lever should not be loosened
during servicing.
[E]
[F]
[G]
[C]
[B]
B023I327.WMF
B023I390.WMF
[D]
B023I973.WMF
1-7
COPIER 26 January, 2001
12. Pull out the revolver/drum drawer [A] (1
long screw and a pressure spring [B]).
NOTE: 1) Pulling out the drawer unit
exposes the drum to light.
Prolonged exposure can
cause optical fatigue,
resulting in poor image
quality. Be sure to shield the
drum unit with 5 or more
sheets of paper.
2) Make sure that the pressure
spring [B] is in place before
reinstalling the transfer
[A]
[B]
B023I905.WMF
faceplate.
13. Lift the drum unit [C] out of the
revolver/drum drawer.
14. Rotate the drum unit clockwise as
shown by the arrow [D] and set it
upside-down.
NOTE: If you do not rotate the drum
unit as shown, toner might
spill out.
[C]
[D]
B023I306.WMF
1-8
26 January, 2001 COPIER
15. Remove the drum protective sheet
[A]: Drum support bushing (! x 2 each)
[B]: Drum with the drum protective
sheet.
[C]: Drum protective sheet
16. Apply setting powder to the entire drum
surface then re-install the drum to the
drum unit.
NOTE: 1) Be sure to apply the
setting powder over the
entire drum. This prevents
the cleaning blade from
catching on the drum
surface.
2) Be sure not to spill the
setting powder on the drum
potential sensor.
1) Turn the drum two or three rotations
to settle the setting powder to the
drum surface.
NOTE: 1) Never remove the drum
protective sheet while the
drum is still in the drum
unit. If you do, the drum
cleaning blade will catch
on the sheet. This can
damage the drum surface.
2) Only touch the edges of
the drum unit. Do not
touch any part further than
10 mm from the edge.
3) Shield the drum unit with
5 or more sheets of paper
after removing the drum
protective sheet.
Otherwise, exposure to
light will cause optical
fatigue, resulting in poor
image quality.
[A]
[B]
Installation
[B]
B023I201.WMF
[C]
B023I977.WMF
1-9
B023I960.WMF
COPIER 26 January, 2001
17. Remove the revolver clamp (! x 1).
NOTE: Keep the revolver clamp in a safe
location. If you ever need to relocated
the printer, you can use it to hold the
revolver in place.
Part No.: A2573256
B023I110.WMF
1-10
26 January, 2001 COPIER
1.2.3 DEVELOPER INSTALLATION
NOTE: Place a floor mat or other
protective sheet on the floor. Take
care not to contaminate the
customer’s floor.
1. Remove the revolver filter [A].
2. Disconnect the toner density sensor
connector [B] and open the
development unit locks [C] at both
ends of the revolver.
[A]
B023I325.WMF
Installation
[C]
!
CAUTION
Do not push the revolver/drum
drawer into the copier with
development locks left open.
Otherwise, the revolver locks may
strike the main unit frame, resulting
in permanent damage to the revolver.
3. Engage the revolver lock [D].
!
CAUTION
1. Be sure the pawl of the revolver
lock [D] is engaged before
removing a development unit.
Failure to observe this precaution
may allow the revolver to rotate,
causing permanent damage to the
development unit or its locks.
2. Always rotate the revolver
counter-clockwise (as shown in
the illustration). Otherwise, the
developer might spill out.
[C]
[B]
B023I308.WMF
[D]
B023I357.WMF
1-11
COPIER 26 January, 2001
4. Remove the development unit [A].
NOTE: When you remove a
development unit, be sure to
rotate in the direction shown in
the figure. Rotating a
development unit in the wrong
direction will spill developer.
!
CAUTION
Remove only one development unit at
a time. Removing two or more
development units at the same time
unbalances the revolver. This can
cause the revolver to turn rapidly,
possibly either catching your fingers,
or rotating clockwise and spilling
developer.
5. Remove the developer cover [B] (2
screws, 4 hooks). (Release the hooks
with a screwdriver.)
[A]
B023I309.WMF
6. Remove the development unit gear cover
[C] (1 screw).
1-12
[B]
B023I151.WMF
[C]
B023I908.WMF
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