Ricoh A294, BELLINI Service Manual
BELLINI
(Machine Code: A294)
SERVICE MANUAL
Subject to change
Ricoh Technical Service
October 22th, 1999
I
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. 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 SICU 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
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.
4. When keeping used lithium batteries in or der to dispos e 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.
NOTES
FOR DISPOSAL
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
I
Use of controls, or adjustment, or performance of procedures other than
those specified in this manual may result in hazardous radiation exposure.
WARNING
I
WARNING: Turn off the main switch before attempting any of the
procedures in the Laser Unit section. Laser beams can
seriously damage your eyes.
CAUTION MARKING:
TABLE OF CONTENTS
1. OVERALL MACHINE INFORMAT ION........................................1-1
1.1 SPECIFICATIONS.................................................................................... 1-1
1.1.1 COPIER ENGINE ............................................................................ 1-1
1.1.2 ADF.................................................................................................. 1-4
1.2 MACHINE CONFIGURATION.................................................................. 1-5
1.3 COMPONENT LAYOUT........................................................................... 1-6
1.3.1 COPIER ENGINE ............................................................................ 1-6
1.3.2 ADF.................................................................................................. 1-7
1.4 PAPER PATH........................................................................................... 1-8
1.5 COPY PROCESS..................................................................................... 1-9
1.6 DRIVE LAYOUT ..................................................................................... 1-11
1.6.1 COPIER ENGINE .......................................................................... 1-11
1.6.2 ADF................................................................................................ 1-12
1.7 ELECTRICAL COMPONENT DESCRIPTIONS...................................... 1-13
1.7.1 COPIER ENGINE .......................................................................... 1-13
1.7.2 ADF................................................................................................ 1-19
2. DETAILED SECTION DESCRIPTIONS.......................................2-1
2.1 DOCUMENT FEEDER.............................................................................. 2-1
2.1.1 PICK-UP ROLLER RELEASE.......................................................... 2-1
2.1.2 BOTTOM PLATE LIFT..................................................................... 2-2
2.1.3 PICK-UP AND SEPARATION.......................................................... 2-3
2.1.4 ORIGINAL FEED............................................................................. 2-4
2.1.5 ORIGINAL SIZE DETECTION......................................................... 2-5
2.1.6 ORIGINAL TRANSPORT................................................................. 2-6
2.1.7 ORIGINAL SKEW CORRECTION................................................... 2-7
2.1.8 ORIGINAL INVERSION AND FEED-OUT....................................... 2-8
2.1.9 JAM CONDITIONS........................................................................ 2-12
2.2 SCANNING............................................................................................. 2-13
2.2.1 OVERVIEW ................................................................................... 2-13
2.2.2 SCANNER DRIVE ......................................................................... 2-14
2.2.3 ORIGINAL SIZE DETECTION IN BOOK MODE............................ 2-15
2.3 IMAGE PROCESSING ........................................................................... 2-17
2.3.1 OVERVIEW ................................................................................... 2-17
2.3.2 SBU ............................................................................................... 2-18
2.3.3 AUTO IMAGE DENSITY (ADS)..................................................... 2-19
2.3.4 IMAGE PROCESSING STEPS AND RELATED SP MODE.......... 2-20
2.3.5 AUTO SHADING............................................................................ 2-26
2.3.6 BACKGROUND ERASE................................................................ 2-27
2.3.7 INDEPENDENT DOT ERASE........................................................ 2-28
2.3.8 FILTERING, MAIN SCAN MAGNIFICATION/REDUCTION........... 2-29
2.3.9 GAMMA (g) CORRECTION ........................................................... 2-31
2.3.10 GRADATION PROCESSING....................................................... 2-31
2.3.11 LINE WIDTH CORRECTION....................................................... 2-32
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2.4 LASER EXPOSURE............................................................................... 2-33
2.4.1 OVERVIEW ................................................................................... 2-33
2.4.2 OPTICAL PATH............................................................................. 2-34
2.4.3 AUTO POWER CONTROL (APC) ................................................. 2-35
2.4.4 FOUR BEAM LASER WRITING .................................................... 2-36
2.4.5 LD SAFETY SWITCHES ............................................................... 2-37
2.5 DRUM UNIT............................................................................................ 2-38
2.5.1 PROCESS CONTROL................................................................... 2-38
2.5.2 TONER DENSITY CONTROL....................................................... 2-43
2.5.3 DRUM UNIT COMPONENTS........................................................ 2-46
2.5.4 DRIVE............................................................................................ 2-47
2.5.5 DRUM CHARGE............................................................................ 2-48
2.5.6 DRUM CLEANING......................................................................... 2-50
2.5.7 OTHERS........................................................................................ 2-53
2.6 DEVELOPMENT..................................................................................... 2-56
2.6.1 OVERVIEW ................................................................................... 2-56
2.6.2 DEVELOPMENT MECHANISM..................................................... 2-57
2.6.3 DRIVE............................................................................................ 2-58
2.6.4 CROSSMIXING ............................................................................. 2-59
2.6.5 DEVELOPMENT BIAS................................................................... 2-60
2.7 TONER SUPPLY AND RECYCLING...................................................... 2-61
2.7.1 TONER BANK................................................................................ 2-61
2.7.2 SUPPLYING TONER TO THE DEVELOPMENT UNIT ................. 2-65
2.7.3 TONER HOPPER.......................................................................... 2-66
2.7.4 TONER RECYCLING AND WASTE TONER COLLECTION......... 2-68
2.8 PAPER FEED.........................................................................................2-71
2.8.1 OVERVIEW ................................................................................... 2-71
2.8.2 DRIVE............................................................................................ 2-72
2.8.3 PAPER LIFT – TRAYS 2 & 3......................................................... 2-73
2.8.4 PICK-UP AND FEED – TRAYS 1 TO 3 ......................................... 2-75
2.8.5 REMAINING PAPER/
PAPER END DETECTION – TRAYS 2 & 3................................... 2-79
2.8.6 PAPER SIZE DETECTION – TRAYS 2 & 3................................... 2-80
2.8.7 TRAY LOCK – TRAYS 2 & 3 ......................................................... 2-81
2.8.8 TANDEM FEED – TRAY 1............................................................. 2-82
2.8.9 VERTICAL TRANSPORT.............................................................. 2-89
2.8.10 PAPER REGISTRATION ............................................................. 2-90
2.9 IMAGE TRANSFER AND PAPER SEPARATION.................................. 2-93
2.9.1 OVERVIEW ................................................................................... 2-93
2.9.2 IMAGE TRANSFER AND PAPER SEPARATION ......................... 2-94
2.9.3 TRANSFER BELT UNIT LIFT........................................................ 2-96
2.9.4 PAPER TRANSPORTATION AND BELT DRIVE.......................... 2-97
2.9.5 TRANSFER BELT CLEANING ...................................................... 2-98
2.9.6 TONER COLLECTION .................................................................. 2-99
2.9.7 TRANSFER ANTI-CONDENSATION HEATER........................... 2-100
2.10 FUSING.............................................................................................. 2-101
2.10.1 OVERVIEW ............................................................................... 2-101
2.10.2 FUSING ENTRANCE GUIDE.................................................... 2-102
2.10.3 FUSING UNIT DRIVE................................................................ 2-103
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2.10.4 FUSING LAMP CONTROL........................................................ 2-104
2.10.5 OIL SUPPLY AND CLEANING.................................................. 2-105
2.10.6 PAPER COOLING..................................................................... 2-106
2.10.7 FUSING PRESSURE................................................................. 2-107
2.10.8 HOT ROLLER STRIPPER RELEASE........................................ 2-108
2.11 PAPER EXIT/DUPLEX....................................................................... 2-109
2.11.1 OVERVIEW ............................................................................... 2-109
2.11.2 PAPER EXIT MECHANISM....................................................... 2-110
2.11.3 DUPLEX DRIVE MECHANISM.................................................. 2-111
2.11.4 INVERTER................................................................................. 2-112
2.11.5 DUPLEX TRAY FEED MECHANISM......................................... 2-114
2.11.6 BASIC DUPLEX FEED OPERATION........................................ 2-115
2.12 ENERGY SAVER MODES ................................................................. 2-119
2.12.1 OVERVIEW ............................................................................... 2-119
2.12.2 ENERGY SAVER (PANEL OFF) MODE.................................... 2-120
2.12.3 LOW POWER MODE ................................................................ 2-121
2.12.4 OFF MODE................................................................................ 2-122
2.12.5 SUMMARY................................................................................. 2-124
2.13 OTHERS............................................................................................. 2-125
2.13.1 OPERATION UNIT .................................................................... 2-125
2.13.2 DOOR SAFETY SWITCH LOCK TOOLS .................................. 2-126
2.13.3 HDD CONTROL......................................................................... 2-127
2.13.4 DATA PATH THROUGH THE INTERFACE BOARD................. 2-129
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.............................................................. 3-2
3.2 COPIER (A294)........................................................................................ 3-3
3.2.1 ACCESSORY CHECK..................................................................... 3-3
3.2.2 INSTALLATION PROCEDURE........................................................ 3-5
3.3 FINISHER INSTALLATION (B302)......................................................... 3-12
3.3.1 ACCESSORY CHECK................................................................... 3-12
3.3.2 INSTALLATION PROCEDURE...................................................... 3-13
3.4 LCT INSTALLATION (B303)................................................................... 3-16
3.4.1 ACCESSORY CHECK................................................................... 3-16
3.4.2 INSTALLATION PROCEDURE...................................................... 3-17
3.5 PUNCH UNIT INSTALLATION (A812).................................................... 3-19
3.5.1 ACCESSORY CHECK................................................................... 3-19
3.5.2 PUNCH UNIT INSTALLATION...................................................... 3-20
3.6 A3/DLT TRAY (B331)............................................................................. 3-23
3.6.1 ACCESSORY CHECK................................................................... 3-23
3.6.2 INSTALLATION PROCEDURE...................................................... 3-24
3.7 KEY COUNTER INSTALLATION ........................................................... 3-27
3.8 INTERFACE BOARD
(CD-RW/TANDEM COPY KIT/PRINTER CONTROLLER)..................... 3-30
3.8.1 INSTALLATION PROCEDURE...................................................... 3-30
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4. SERVICE TABLES......................................................................4-1
4.1 GENERAL CAUTIONS............................................................................. 4-1
4.1.1 DRUM.............................................................................................. 4-1
4.1.2 DRUM UNIT ..................................................................................... 4-1
4.1.3 TRANSFER BELT UNIT .................................................................. 4-2
4.1.4 SCANNER UNIT..............................................................................4-2
4.1.5 LASER UNIT.................................................................................... 4-2
4.1.6 CHARGE CORONA......................................................................... 4-3
4.1.7 DEVELOPMENT.............................................................................. 4-3
4.1.8 CLEANING....................................................................................... 4-4
4.1.9 FUSING UNIT.................................................................................. 4-4
4.1.10 PAPER FEED................................................................................ 4-4
4.1.11 USED TONER ............................................................................... 4-4
4.2 SERVICE PROGRAM MODE................................................................... 4-5
4.2.1 SERVICE PROGRAM MODE OPERATION.................................... 4-5
4.2.2 SERVICE PROGRAM MODE TABLES......................................... 4-10
4.2.3 TEST PATTERN PRINTING (SP2-902)......................................... 4-59
4.2.4 INPUT CHECK............................................................................... 4-60
4.2.5 OUTPUT CHECK........................................................................... 4-68
4.2.6 SYSTEM PARAMETER AND DATA LISTS (SMC LISTS)............. 4-70
4.2.7 MEMORY ALL CLEAR (SP5-801)................................................. 4-70
4.2.8 SOFTWARE RESET...................................................................... 4-71
4.2.9 SYSTEM SETTING AND
COPY SETTING (UP MODE) RESET........................................... 4-71
4.3 PM COUNTER........................................................................................ 4-72
4.3.1 PM COUNTER ACCESS PROCEDURE....................................... 4-72
4.4 PROGRAM DOWNLOAD....................................................................... 4-78
4.5 NVRAM DATA DOWNLOAD.................................................................. 4-80
4.6 LANGUAGE DATA DOWNLOAD........................................................... 4-81
4.7 STAMP DATA DOWNLOAD................................................................... 4-81
4.8 USER PROGRAM MODE....................................................................... 4-82
4.8.1 HOW TO ENTER AND EXIT UP MODE........................................ 4-82
4.8.2 UP MODE TABLE.......................................................................... 4-82
4.8.3 IMAGE QUALITY SETTING BY UP MODE................................... 4-85
4.8.4 LEDS ............................................................................................. 4-91
4.9 TEST POINTS/DIP SWITCHES/LEDS................................................... 4-92
4.9.1 DIP SWITCHES............................................................................. 4-92
4.9.2 TEST POINTS............................................................................... 4-93
4.9.3 FUSES........................................................................................... 4-93
4.9.4 VARIABLE RESISTORS................................................................ 4-93
4.10 SPECIAL TOOLS AND LUBRICANTS................................................. 4-94
4.10.1 SPECIAL TOOLS......................................................................... 4-94
4.10.2 LUBRICANTS.............................................................................. 4-94
5. PREVENTIVE MAINTENANCE SCHEDULE...............................5-1
5.1 PM PARTS ............................................................................................... 5-1
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6. REPLACEMENT AND ADJUSTMENT ........................................ 6-1
6.1 EXTERIOR ............................................................................................... 6-1
6.1.1 FRONT ............................................................................................ 6-1
6.1.2 RIGHT.............................................................................................. 6-2
6.1.3 LEFT................................................................................................ 6-3
6.1.4 REAR............................................................................................... 6-4
6.2 DOCUMENT FEEDER.............................................................................. 6-5
6.2.1 COVER REMOVAL.......................................................................... 6-5
6.2.2 FEED UNIT REMOVAL AND
SEPARATION ROLLER REPLACEMENT....................................... 6-7
6.2.3 FEED BELT REPLACEMENT.......................................................... 6-8
6.2.4 PICK-UP ROLLER REPLACEMENT............................................... 6-9
6.2.5 SENSOR REPLACEMENT............................................................ 6-10
6.2.6 TRANSPORT BELT REPLACEMENT........................................... 6-14
6.2.7 MOTOR REPLACEMENT.............................................................. 6-15
6.2.8 FEED-IN CLUTCH REPLACEMENT............................................. 6-17
6.3 SCANNER UNIT..................................................................................... 6-18
6.3.1 EXPOSURE GLASS...................................................................... 6-18
6.3.2 LENS BLOCK................................................................................ 6-19
6.3.3 ORIGINAL SIZE SENSORS.......................................................... 6-20
6.3.4 EXPOSURE LAMP........................................................................ 6-21
6.3.5 LAMP REGULATOR...................................................................... 6-22
6.3.6 OPTICS DUST FILTER ................................................................. 6-23
6.3.7 SCANNER H.P. SENSOR............................................................. 6-24
6.3.8 SCANNER MOTOR....................................................................... 6-25
6.3.9 SCANNER DRIVE WIRES............................................................. 6-26
6.4 LASER UNIT........................................................................................... 6-29
6.4.1 CAUTION DECAL LOCATIONS.................................................... 6-29
6.4.2 LDB AND LD FILTER REPLACEMENT......................................... 6-30
6.4.3 POLYGON MIRROR MOTOR REPLACEMENT............................ 6-31
6.4.4 LASER SYNCHRONIZATION DETECTOR REPLACEMENT....... 6-32
6.5 DRUM UNIT............................................................................................ 6-33
6.5.1 DRUM UNIT REMOVAL AND DRUM REPLACEMENT................ 6-33
6.5.2 QUENCHING LAMP REPLACEMENT .......................................... 6-34
6.5.3 GRID PLATE/CHARGE CORONA WIRE/
WIRE CLEANER REPLACEMENT................................................ 6-35
6.5.4 DRUM POTENTIAL SENSOR REPLACEMENT........................... 6-37
6.5.5 CLEANING BLADE/ID SENSOR REPLACEMENT....................... 6-38
6.5.6 CLEANING BRUSH REPLACEMENT........................................... 6-39
6.5.7 PICK-OFF PAWL REPLACEMENT............................................... 6-40
6.5.8 DRUM FILTER REPLACEMENT................................................... 6-41
6.6 DEVELOPMENT AND TONER SUPPLY................................................ 6-42
6.6.1 DEVELOPMENT UNIT REMOVAL................................................ 6-42
6.6.2 DEVELOPER REPLACEMENT..................................................... 6-43
6.6.3 DEVELOPMENT AND AIR DUST FILTER REPLACEMENT ........ 6-45
6.6.4 DEVELOPMENT ENTRANCE, FRONT, AND
REAR SIDE SEALS....................................................................... 6-46
6.6.5 TONER DENSITY SENSOR REPLACEMENT.............................. 6-47
v
6.6.6 TONER HOPPER SENSOR REPLACEMENT.............................. 6-48
6.6.7 DEVELOPMENT MOTOR REPLACEMENT.................................. 6-49
6.6.8 DEVELOPMENT ROLLER SHAFT CLEANING............................. 6-50
6.7 TRANSFER BELT UNIT......................................................................... 6-51
6.7.1 TRANSFER BELT UNIT REMOVAL/INSTALLATION ................... 6-51
6.7.2 TRANSFER BELT REPLACEMENT.............................................. 6-53
6.7.3 TRANSFER BELT CLEANING BLADE REPLACEMTNT.............. 6-55
6.7.4 TRANSFER BELT BIAS BRUSH REPLACEMENT....................... 6-56
6.8 PAPER FEED.........................................................................................6-57
6.8.1 PAPER TRAY REMOVAL.............................................................. 6-57
6.8.2 PAPER FEED ROLLER REPLACEMENT..................................... 6-60
6.8.3 PAPER FEED AND VERTICAL TRANSPORT CLUTCH, AND
TRAY LIFT, PAPER FEED, AND
PAPER END SENSOR REMOVAL............................................... 6-61
6.8.4 REAR FENCE RETURN SENSOR REPLACEMENT.................... 6-64
6.8.5 REAR FENCE HP SENSOR REPLACEMENT.............................. 6-65
6.8.6 RIGHT 1ST TRAY PAPER SENSOR REPLACMENT................... 6-66
6.8.7 BOTTOM PLATE LIFT WIRE REPLACEMENT............................. 6-67
6.8.8 PAPER DUST REMOVER CLEANING.......................................... 6-69
6.8.9 REGISTRATION SENSOR CLEANING......................................... 6-70
6.8.10 UNIVERSAL TRAY SIZE SWITCH REPLACEMENT.................. 6-71
6.8.11 1ST TRAY LIFT MOTOR REMOVAL........................................... 6-72
6.8.12 LIFT MOTOR REMOVAL (2ND & 3RD TRAYS).......................... 6-73
6.8.13 PAPER FEED MOTOR REMOVAL ............................................. 6-74
6.8.14 RELAY MOTOR, UPPER RELAY CLUTCH,
LCT RELAY CLUTCH REMOVAL............................................... 6-75
6.8.15 REGISTRATION MOTOR REMOVAL......................................... 6-76
6.8.16 COPIER FEED UNIT/DEVELOPMENT FAN MOTOR
REMOVAL................................................................................... 6-77
6.8.17 LCT RELAY AND RELAY SENSOR REMOVAL.......................... 6-78
6.8.18 TANDEM FEED TRAY PAPER SIZE CHANGE.......................... 6-79
6.8.19 MECHANICAL SIDE REGISTRATION ADJUSTMENT............... 6-82
6.9 FUSING UNIT......................................................................................... 6-83
6.9.1 OIL SUPPLY & CLEANING WEB UNIT REMOVAL ...................... 6-83
6.9.2 HOT ROLLER UNIT REMOVAL AND
PRESSURE ROLLER REPLACEMENT........................................ 6-84
6.9.3 HOT ROLLER REPLACEMENT.................................................... 6-86
6.9.4 OIL SUPPLY & CLEANING WEB REPLACEMENT ...................... 6-88
6.9.5 WEB CLEANING ROLLER REPLACEMENT ................................ 6-90
6.9.6 HOT ROLLER STRIPPER REPLACEMENT ................................. 6-91
6.9.7 PRESSURE ROLLER STRIPPER REPLACEMENT..................... 6-92
6.9.8 PRESSURE ROLLER CLEANING ROLLER REPLACEMENT...... 6-93
6.9.9 FUSING AND EXIT UNIT REMOVAL............................................ 6-94
6.9.10 FUSING PRESSURE ADJUSTMENT.......................................... 6-95
6.10 PAPER EXIT/DUPLEX UNIT................................................................ 6-96
6.10.1 EXIT SENSOR REPLACEMENT................................................. 6-96
6.10.2 DUPLEX UNIT REMOVAL........................................................... 6-97
6.10.3 DUPLEX UNIT INNER COVER REMOVAL................................. 6-98
6.10.4 JOGGER MOTOR REPLACEMENT............................................ 6-99
vi
6.10.5 DUPLEX UNIT CLUTCH REPLACEMENT................................ 6-100
6.10.6 DUPLEX ENTRANCE SENSOR REPLACEMENT.................... 6-101
6.10.7 DUPLEX TRANSPORT SENSORS 2 & 3.................................. 6-102
6.10.8 DUPLEX TRANSPORT SENSOR 1/
DUPLEX INVERTER SENSOR................................................. 6-103
6.11 TONER BANK .................................................................................... 6-104
6.11.1 WASTE TONER BOTTLE REMOVAL....................................... 6-104
6.11.2 TONER BANK UNIT REMOVAL................................................ 6-105
6.11.3 TONER SUPPLY MOTOR AND
TONER SUPPLY MOTOR SENSOR REMOVAL ...................... 6-108
6.11.4 ACCESS TO INSIDE THE TONER BANK.................................6-109
6.12 BOARDS AND OTHER ITEMS........................................................... 6-110
6.12.1 SICU BOARD............................................................................. 6-110
6.12.2 HARD DISK DRIVE ................................................................... 6-111
6.12.3 BCU BOARD.............................................................................. 6-112
6.12.4 I/O BOARD ................................................................................ 6-113
6.12.5 PSU ........................................................................................... 6-114
6.12.6 CHARGE/GRID/BIAS POWER PACK ....................................... 6-115
6.12.7 FUSING/DUPLEX MOTOR REPLACEMENT............................ 6-116
6.12.8 DRUM MOTOR REPLACEMENT.............................................. 6-117
6.13 COPY IMAGE ADJUSTMENT: PRINTING/SCANNING..................... 6-118
6.13.1 PRINTING.................................................................................. 6-118
6.13.2 PARALLELOGRAM IMAGE ADJUSTMENT.............................. 6-121
6.13.3 SCANNING................................................................................ 6-123
6.13.4 ADF IMAGE ADJUSTMENT...................................................... 6-124
6.14 TOUCH SCREEN CALIBRATION...................................................... 6-125
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................................................ 7-36
7.2.1 SENSORS..................................................................................... 7-36
7.2.2 SWITCHES.................................................................................... 7-40
7.3 BLOWN FUSE CONDITIONS................................................................. 7-41
vii
OPTION
3,000-SHEET FINISHER (B302)
1. OVERALL MACH INE INFORMATION..................................B302-1
1.1 SPECIFICATIONS..............................................................................B302-1
1.2 MECHANICAL COMPONENT LAYOUT.............................................B302-3
1.3 ELECTRICAL COMPONENT DESCRIPTION....................................B302-4
1.4 DRIVE LAYOUT .................................................................................B302-6
2. DETAILED DESCRIPTIONS .................................................B302-7
2.1 TRAY AND STAPLER JUNCTION GATE...........................................B302-7
2.2 PAPER PRE-STACKING....................................................................B302-8
2.3 JOGGER UNIT PAPER POSITIONING..............................................B302-9
2.4 STAPLER UNIT MOVEMENT..........................................................B302-10
2.5 STAPLER .........................................................................................B302-12
2.6 FEED-OUT .......................................................................................B302-14
2.7 SHIFT TRAY UP/DOWN MOVEMENT.............................................B302-15
2.8 SHIFT TRAY SIDE-TO-SIDE MOVEMENT......................................B302-16
2.9 PUNCH UNIT DRIVE........................................................................B302-17
2.10 PUNCH WASTE COLLECTION .....................................................B302-18
2.11 JAM CONDITIONS.........................................................................B302-19
3. SERVICE TABLES..............................................................B302-20
3.1 DIP SWITCHES................................................................................B302-20
3.2 TEST POINTS..................................................................................B302-20
3.3 FUSES..............................................................................................B302-20
4. REPLACEMENT AND ADJUSTMENT................................B302-21
4.1 COVER REPLACEMENT.................................................................B302-21
4.2 POSITIONING ROLLER REPLACEMENT.......................................B302-24
4.3 ALIGNMENT BRUSH ROLLER REPLACEMENT............................B302-25
4.4 SENSOR REPLACEMENT...............................................................B302-26
4.4.1 STACK HEIGHT 1, 2 AND EXIT GUIDE OPEN SENSOR ......B302-26
4.4.2 UPPER TRAY PAPER LIMIT AND EXIT SENSOR.................B302-27
4.4.3 SHIFT TRAY EXIT SENSOR...................................................B302-28
4.4.4 ENTRANCE AND
STAPLER TRAY ENTRANCE SENSORS...............................B302-29
4.4.5 PRE-STACK STOPPER SENSOR..........................................B302-30
4.4.6 STAPLE WASTE HOPPER SENSOR.....................................B302-31
4.4.7 STAPLER ROTATION HP AND
STAPLER RETURN SENSORS..............................................B302-32
4.5 STAPLER REMOVAL.......................................................................B302-33
4.6 PUNCH POSITION ADJUSTMENT..................................................B302-34
viii
LCT (B303)
1. OVERALL MACH INE INFORMATION..................................B303-1
1.1 SPECIFICATIONS..............................................................................B303-1
1.2 MECHANICAL COMPONENT LAYOUT.............................................B303-2
1.3 ELECTRICAL COMPONENT DESCRIPTIONS..................................B303-3
1.4 DRIVE LAYOUT .................................................................................B303-5
2. DETAILED DESCRIPTIONS .................................................B303-6
2.1 PAPER FEED.....................................................................................B303-6
2.2 PICK-UP AND FEED..........................................................................B303-7
2.2.1 OVERVIEW ...............................................................................B303-7
2.2.2 PICK-UP AND FEED.................................................................B303-8
2.2.3 SEPARATION ROLLER RELEASE...........................................B303-9
2.3 PAPER LIFT.....................................................................................B303-10
2.3.1 TRAY DETECTION..................................................................B303-10
2.3.2 LIFT MECHANISM...................................................................B303-10
2.3.3 LIFT SENSOR.........................................................................B303-11
2.4 PAPER SIZE DETECTION...............................................................B303-12
1.5 PAPER END DETECTION ...............................................................B303-13
3. REPLACEMENT AND ADJUSTMENT................................B303-14
3.1 EXTERIOR COVER REMOVAL.......................................................B303-14
3.2 INNER COVER REMOVAL .............................................................. B303-15
3.3 PAPER FEED ROLLER REPLACEMENT........................................B303-16
3.4 LCT MOTOR REPLACEMENT.........................................................B303-17
3.5 RELAY SENSOR REPLACEMENT.................................................. B303-18
3.6 PAPER HEIGHT SENSOR AND
PAPER SIZE SWITCH REPLACEMENT..........................................B303-19
3.7 MAIN DRIVE BELT REPLACEMENT...............................................B303-20
3.8 SIDE REGISTRATION ADJUSTMENT.............................................B303-21
A3/DLT TRAY KIT (B331)
1. OVERALL MACH INE INFORMATION..................................B331-1
1.1 SPECIFICATIONS..............................................................................B331-1
2. DETAILED DESCRIPTIONS .................................................B331-2
2.1 SECTIONAL DESCRIPTION..............................................................B331-2
3. REPLACEMENT AND ADJUSTMENT..................................B331-3
3.1 BOTTOM PLATE LIFT WIRE REPLACEMENT......................B331-3
ix
22 October 1999 SPECIFICATIONS
1. OVERALL MACHINE INFORMATION
1.1 SPECIFICATIONS
1.1.1 COPIER ENGINE
Configuration: Console
Copy Process: Dry electrostatic transfer system
Originals: Sheet/Book
Original Size: Maximum: A3/11" x 17"
Minimum: A5, 5
Original Alignment: Rear left corner
Paper Size/Weight:
Size: Mainframe, Tray 1 (Tandem Tray):
A4 sideways and LT sideways
Mainframe, Trays 2 and 3 (Universal Trays):
Europe/Asia:
A5 sideways - A3 lengthwise,
8-kai sideways, 16-kai
N. America:
5
" x 8
1/2
LCT, Trays 4 ~ 6:
A4 sideways, B5 sideways, LT sideways, A5, HLT
Duplex Tray: A5/HLT (lengthwise or sideways)
"x 8
1/2
" sideways - 11" x 17" lengthwise
1/2
" (using ADF)
1/2
to A3/DLT, except that tab paper cannot
be used
Overall
Information
Weight: Mainframe, Trays 1 to 3:
52 to 163 g/m
2
16 to 40 lbs Bond
50 to 60 lbs Cover
90 lbs Index (no Tab)
LCT, Trays 4 and 5:
52 to 216 g/m
2
16 to 40 lbs Bond
50 to 80 lbs Cover
90 to 110 lbs Index
LCT, Tray 6:
Same as Mainframe, Trays 1 to 3
Duplex Tray:
64 to 163 g/m
2
20 to 40 lbs Bond
50 to 60 lbs Cover
90 lbs Index (no Tab)
1-1
SPECIFICATIONS 22 October 1999
Reproduction Ratios: 7 reduction and 5 enlargement
Metric Version Inch Version
400%
200%
Enlargement
Full Size 100% 100%
Reduction
141%
122%
115%
93%
82%
75%
71%
65%
50%
25%
400%
200%
155%
129%
121%
93%
85%
78%
73%
65%
50%
25%
Zoom: 25 ~ 400%
Copy Speed: Max. 85 cpm (A4/8
" x 11" sideways)
1/2
Resolution: Scanning: 600 dpi
Printing: 600 dpi
Gradation: 256 levels
Warm-up Time: Less than 360 s (from Off mode)
First Copy Time:
(1st Tray, A4 sideways)
Less than 5.4 s (Finisher upper tray: face down)
Less than 4.1 s (Finisher upper tray: face up)
Less than 4.5 s (Copier: face down)
Less than 3.2 s (Copier: face up)
Copy Number Input: Ten-key pad, 1 to 9999
Copy Paper Capacity: 1st Tray: 1,000 sheets (2,000 when used as a tandem
tray)
2nd/3rd Tray: 500 sheets each
4th/5th Tray (LCT): 1,000 sheets each
6th Tray (LCT): 2,500 sheets
Memory Capacity: RAM: 48 MB x 2
HDD: 4.3 GB x 2
Toner Replenishment: Cartridge exchange (1,450 g/cartridge)
Toner Yield: 55 k copies
(A4 sideways, 6% full black, 1 to 25 copying)
Power Source: North America:240 V, 60 Hz, 20 A
Europe/Asia: 220 ~ 240 V, 50Hz/60 Hz, 16 A
1-2
22 October 1999 SPECIFICATIONS
Power Consumption:
N. America Version
NA (240 V/60 Hz)
Copier Only System
Single Side
Copy
Warm-up ON 1,864 1,888
OFF 444 462 470 502Copying
ON 2,122 2,135 2, 152 2,182
OFF 190 203Stand-by
ON 753 766
OFF 169 183Energy Star
(15 min)
Low Power Mode 293.2
OFF Mode 11
ON 733 746
Duplex
Copy
Single Side
Copy
Europe Version
EU (230 V/50 Hz)
Copier Only System
Single Side
Copy
Warm-up ON 1,800 1,810
OFF 453 472 467 510Copying
ON 2,014 2,036 2, 032 2,074
OFF 190 203Stand-by
ON 718 733
OFF 169 182Energy Star
(15 min)
Low Power Mode 299.0
OFF Mode 11
ON 698 712
Duplex
Copy
Single Side
Copy
(Unit: Wh)
Overall
Information
Duplex
Copy
(Unit: Wh)
Duplex
Copy
NOTE:
ON: Fusing Lamp On, OFF: Fusing Lamp Off
1-3
SPECIFICATIONS 22 October 1999
Noise Emission:
Sound Power Level:
The measurements were made in accordance with ISO 7779.
Copier only Full system
Stand-by Less than 59 dB(A) Less than 58 dB(A)
Copying (ADF 1 to 1) Less than 72 dB(A) Less than 78 dB(A)
Copying Less than 71 dB(A) Less than 77 dB(A)
Sound Pressure Level:
The measurements were made in accordance with ISO 7779.
Copier only Full system
Stand-by Less than 44 dB(A) Less than 45 dB(A)
Copying (ADF 1 to 1) Less than 67 dB(A) Less than 68 dB(A)
Copying (From Memory) Less than 59 dB(A) N/A
Dimensions:
(W x D x H)
870 x 735 x 1,476 mm (34.3" x 28.9" x 58.1")
(without options)
Weight: 252 kg (without options)
Optional Equipment: Refer to Machine Configuration
1.1.2 ADF
Original Size: Normal Original Mode:
A3 to B6, DLT to HLT
Thin Original Mode:
A3 to B6 sideways, DLT to HLT
Duplex Original Mode:
A3 to A5, DLT to HLT
Original Weight: Normal Original Mode:52 ~ 156 g/m2, 14 ~ 42 lb
Thin Original Mode: 40 ~ 156 g/m2, 11 ~ 42 lb
Duplex Original Mode: 52 ~ 128 g/m2, 14 ~ 34 lb
Table Capacity: 100 sheets (80 g/m2, 20 lb)
Original Feeding Speed: 72 cpm (A4/LT sideways, 1 to 1)
Original Standard Position: Rear left corner
Separation: FRR
Original Transport: One flat belt
Original Feed Order: From the top original
Power Source: DC 24 V and DC 38 V from the copier
Power Consumption: 145 W
Dimensions (W x D x H): 680 x 560 x 150 mm
1-4
22 October 1999 MACHINE CONFIGURATION
1.2 MACHINE CONFIGURATION
46 5
1
3
Overall
Information
2
7
Item Machine Code No.
Mainframe A294 1
Finisher B302 2
LCT B303 3
Interface Kit Type 850: * B327 4
A3/DLT Tray Kit Type 850
CD-RW
(CDROM reader/writer): *
Punch Unit A812-30, 31, 32, 57, 67 Inside the Finisher
Connector
(for the Tandem Copy feature): *
*: When the CD-RW and/or the copy connector cable are/is installed, the interface kit is
required.
B331
B334 5
B328 6
Replaces the tandem LCT
A294V502.WMF
7
1-5
COMPONENT LAYOUT 22 October 1999
1.3 COMPONENT LAYOUT
1.3.1 COPIER ENGINE
8
96 753 41 2
3433
32
31
30
29
28
27
26
25
24
10
11
12
13
14
15
16
17
18
23 22 21 20 19
1. Laser Diode Board
2. fq Lenses
3. Sensor Board Unit
4. Exposure Lamp
5. Cleaning Brush
6. Lamp Regulator
7. Cleaning Blade
8. Charge Corona Unit
9. System Image Contro l Unit
10. Color LCD
11. Drum
12. Development Unit
13. Registration Roller
14. LCT Relay Roller
15. Transfer Belt Unit
16. Relay Roller
17. Pick-up Roller
A294V101.WMF
18. Vertical Transport Rollers
19. Separation Roller
20. Feed Roller
21. 1st Tray (Tandem, 1,000 sheets each)
22. 2nd Tr ay (500 sheets)
23. 3rd Tray (500 sheets)
24. Used Toner Bottle
25. Toner Bank Unit
26. Duplex Tr ay
27. Inverter Unit Paper Exit Roller
28. Inverter Feed Roller
29. Pressure Roller
30. Paper Cooling Pipe
31. Hot Roller
32. Motor Control Unit
33. Oil Supply & Cleaning Web
34. Drum Unit
1-6
22 October 1999 COMPONENT LAYOUT
1.3.2 ADF
Overall
Information
1
21
20
19
18 17 1213141516
1. Separation Roller
2. Feed Belt
3. Pick-up Roller
4. Bottom Plate
5. Original Tray
6. Upper Tray Exit Roller
7. Inverter Gate
8. Inverter Guide Roller
9. Inverter Sensor
10. Right Tray Exit Roller
11. Right Exit Tray
7
12. Exit Gate
13. Inverter Roller
14. Exit Sensor
15. Upper Exit Tray
16. Transport Belt
17. Registration Sensor
18. Lower Transport Roller
19. Width Sensor
20. Upper T ransport Roller
21. Entrance Sensor
863425
B301V001.WMF
9
10
11
1-7
PAPER PATH 22 October 1999
1.4 PAPER PATH
1
10
9
8
7
6
5
4
1. ADF
2. Optional LCT
3. Tray 3 (1,500-sheet LCT)
4. Tray 2 (550-sheet Tray)
5. Tray 1 (Tandem Tray)
2
3
A294V504.WMF
6. Duplex Unit
7. Finisher
8. Inverter Unit
9. Shift Tray
10. Upper T ray
1-8
22 October 1999 COPY PROCESS
1.5 COPY PROCESS
1
A229V508.WMF
Overall
Information
2
10
3
4
9
8
7
6
A229V510.WMF
1. EXPOSURE
A xenon lamp exposes the original. Light reflected from the original passes to
the CCD, where it is converted into an analog data signal. This data is
converted to a digital signal, processed, and stored in the memory. At the time
of printing, the data is retrieved and sent to the laser diode. For multi-copy runs,
the original is scanned once only and stored to the hard disk.
5
2. DRUM CHARGE
An OPC (organic photoconductor) drum is used in this machine. In the dark,
the charge corona unit gives a negative charge to the drum. The grid plate
ensures that corona charge is applied uniformly. The charge remains on the
surface of the drum because the OPC layer has a high electrical resistance in
the dark.
1-9
COPY PROCESS 22 October 1999
3. LASER EXPOSURE
The processed data from the scanned original is retrieved from the hard disk
and transferred to the drum by four laser beams, w hic h for m an electr ost ati c
latent image on the drum surface. The amount of charge remaining as a latent
image on the drum depends on the laser beam intensity, which is controlled by
the laser diode board (LDB).
4. DRUM POTENTIAL SENSOR
The drum potential sensor detects the electric potential on the drum to correct
various process control elements.
5. DEVELOPMENT
The magnetic developer br ush on the development rollers comes in contac t
with the latent image on the drum surface. Toner particles are electrostatically
attracted to the areas of the drum surface where the laser reduced the negative
charge on the drum.
6. IMAGE TRANSFER
Paper is fed to the area between the drum surface and the transfer belt at the
proper time to align the copy paper and the developed image on the drum.
Then, the transfer bias roller and brush apply a high positive charge to the
reverse side of the paper through the transfer belt. This positive charge pulls
the toner particles from the drum to the paper. At the same time, the paper is
electrically attracted to the transfer belt.
7. PAPER SEPARATION
Paper separates from the drum as a result of the electrical attraction between
the paper and the transfer belt. The pick-off pawls also help separate the paper
from the drum.
8. ID SENSOR
The laser forms a sensor pattern on the drum surface. The ID sensor measures
the reflectivity of the pattern. The output signal is one of the factors used for
toner supply control.
9. CLEANING
The cleaning brush removes toner remaining on the drum after image transfer
and the cleaning blade scrapes off all remaining toner.
10. QUENCHING
The light from the quenching lamp electrically neutralizes the charge on the
drum surface.
1-10
22 October 1999 DRIVE LAYOUT
1.6 DRIVE LAYOUT
1.6.1 COPIER ENGINE
Overall
Information
1
2
7
6
3
5
4
A294V501.WMF
1. Drum Motor
2. Scanner Motor
3. Fusing/Duplex Motor
4. Paper Feed Motor
5. Registrat ion Motor
6. Relay Motor
7. Development Motor
1-11
DRIVE LAYOUT 22 October 1999
1.6.2 ADF
14
13
12
11
10
1
2
3
4
5
9
6
8
B301V101.WMF
7
1. Pick-up Motor
2. Bottom Plate Motor
3. Feed-in Motor
4. Transport Motor
5. Upper Exit Roller
6. Feed-out Motor
7. Right Exit Roller
8. Transport Belt
9. Lower Transport Roller
10. Upper T ransport Roller
11. Separation Roller
12. Feed Belt
13. Pick-up Roller
14. Feed-in Clutch
1-12
22 October 1999 ELECTRICAL COMPONENT DESCRIPTIONS
1.7 ELECTRICAL COMPONENT DESCRIPTIONS
Refer to the electrical component layout on the reverse side of the point-to-point
diagram for the location of the components using the symbols and index numbers.
1.7.1 COPIER ENGINE
Symbol Name Function
Motors
M1 Scanner Drives the 1st and 2nd scanners.
M2 Polygonal Mirror Turns the polygonal mirror.
M3 Drum Drives the drum, cleaning unit, and transfer belt unit.
M4 Development Drives the development unit.
M5 Toner Supply Supplies the toner to the toner hopper.
M6
M7
M8
M9
M10
M11
M12
M13
M14 Relay Drives the upper relay roller and the LCT relay roller.
M15
M16
M17
M18 Registration Drives the registration r oller s.
M19
M20
M21
M22 Optics Cooling Fan Removes heat from the scanner optics unit.
M23
M24 LDB Cooling Fan Removes heat from around the LDB.
Toner Bank Drives the toner transport coil, which feeds fresh
toner from the toner bank to the toner supply cylinder.
Upper Toner Bottle
Upper Bottle Cap Opens and closes the inner cap of the upper toner
Lower Toner Bottle Rotates the lower toner bottle to supply toner to the
Lower Bottle Cap Opens and closes the inner cap of the lower toner
Charge Corona Wire
Cleaner
Fusing/Duplex Drives the fusing unit, duplex unit, inverter unit, and
Paper Feed Drives the paper feed, separation, pick-up, lower
1st Tray Lift
2nd Tray Lift Raises and lowers the bottom plate in the 2nd paper
3rd Tray Lift Raises and lowers the bottom plate in the 3rd paper
Oil Supply/Cleaning
Web
Rear Fence Drive
Jogger Drives the jogger fences to square the paper stack in
Polygonal Mirror
Motor Cooling Fan
Rotates the upper toner bottle to supply toner to the
toner entrance tank.
bottle.
toner entrance tank.
bottle.
Drives the charge corona wire cleaner.
paper exit rollers.
relay, and vertical transport rollers.
Raises and lowers the bottom plate in the 1st paper
tray.
tray.
tray.
Drives the oil supply/cleaning web.
Moves the paper stack in the left tandem tray to the
right tandem tray.
the duplex unit.
Removes heat from around the polygonal mirror
motor.
Overall
Information
1-13
ELECTRICAL COMPONENT DESCRIPTIONS 22 October 1999
Symbol Name Function
M25 SICU Cooling Fan Removes heat from around the SICU.
M26 Drum Cooling Fan Removes heat from the drum.
M27
M28
M29
Development Unit
Cooling Fan 1
Development Unit
Cooling Fan 2
Paper Cooling Pipe
Fan
Removes heat from the development unit.
Removes heat from the development unit.
Removes heat from the paper cooling pipe.
M30 Duplex Cooling Fan Rem oves heat from around the duplex unit.
M31 Exhaust Fan Removes heat from around the fusing unit.
M32 Steam Removal Fan Removes water vapour from around the fusing unit.
M33 PSU Cooling Fan 1 Removes heat from the PSU.
M34 PSU Cooling Fan 2 Removes heat from the PSU.
Sensors
S1
S2
S3
S4
Scanner HP Informs the CPU when the 1st and 2nd scanners are
at home position.
Original Width
Detects original width.
This is one of the APS (Auto Paper Select) sensors.
Original Length 1 Detect s original length.
This is one of the APS (Auto Paper Select) sensors.
Original Length 2 Detect s original length.
This is one of the APS (Auto Paper Select) sensors.
S5 Drum Potential Detects the drum surface potential.
S6 Toner Density (TD) Detects the amount of toner in the developer.
S7
Image Density (ID)
Detects the density of the ID sensor pattern on the
drum.
S8 Toner Hopper Detects toner in the toner hopper.
S9 Toner Supply Motor Monitors the toner supply motor.
S10 Upper Toner Bottle Detects when the upper toner bottle is set.
S11 Lower Toner Bottle Detects when the lower toner bottle is set.
S12
S13
S14
Upper Bottle Inner
Cap
Lower Bottle Inner
Cap
Toner Collection
Bottle
Detects when the inner cap of the upper toner bottle
is opened.
Detects when the inner cap of the lower toner bottle is
opened.
Detects when the waste toner collection bottle is set.
S15 Toner Overflow Detects when the waste toner collection bottle is full.
S16 Toner Near End Detects toner near end in the toner bank unit.
S17
S18
S19
S20
1st Paper Feed Controls the 1st paper feed clutch on/off timing and
the 1st pick-up solenoid off timing.
2nd Paper Feed
Controls the 2nd paper feed clutch on/off timing and
the 2nd pick-up solenoid off timing.
3rd Paper Feed Controls the 3rd paper feed clutch on/off timing and
the 3rd pick-up solenoid off timing.
1st Tray Lift Detects when the paper in tray 1 is at the correct
height for paper feed.
1-14
22 October 1999 ELECTRICAL COMPONENT DESCRIPTIONS
Symbol Name Function
S21
S22
2nd Tray Lift Detects when the paper in tray 2 is at the correct
height for paper feed.
3rd Tray Lift Detects when the paper in tray 3 is at the correct
height for paper feed.
S23 1st Paper End Informs the CPU when tray 1 runs out of paper.
S24 2nd Paper End Informs the CPU when tray 2 runs out of paper.
S25 3rd Paper End Informs the CPU when tray 3 runs out of paper.
S26
S27
S28
S29
S30
S31
S32
S33
S34
S35
S36
S37
S38
Rear Fence HP Informs the CPU when the tandem tray rear fence is
in the home position.
Rear Fence Return
Informs the CPU when the tandem tray rear fence is
in the return position.
Front Side Fence
Open
Front Side Fence
Closed
Rear Side Fence
Open
Rear Side Fence
Closed
Detects whether the tandem tray front side fence is
opened.
Detects whether the tandem tray front side fence is
closed.
Detects whether the tandem tray rear side fence is
opened.
Detects whether the tandem tray rear side fence is
closed.
Base Plate Down Detects when the bottom plate is completely lowered,
to stop the 1st tray lift motor.
1st Tray Paper
Detects the paper height in the 1st tray.
Height 1
1st Tray Paper
Detects the paper height in the 1st tray.
Height 2
1st Tray Paper
Detects the paper height in the 1st tray.
Height 3
1st Tray Paper
Detects the paper height in the 1st tray.
Height 4
Left 1st Tray Paper
Detects whether there is paper in the left side of the
1st tray.
Right 1st Tray Paper Detects whether there is paper in the right side of the
1st tray, allowing the tray to lift if paper is present.
S39 Duplex Inverter Detects misfeeds.
S40
Duplex Entrance Detects the leading and trailing edges of the paper to
determine the reverse roller solenoid on or off timing.
S41 Duplex Transport 1 Detects the position of paper in the duplex unit.
S42 Duplex Transport 2 Detects the position of paper in the duplex unit.
S43 Duplex Transport 3 Detects the position of paper in the duplex unit.
S44
Duplex Jogger HP Detects if the duplex jogger fences are at the home
position or not.
S45 LCT Relay Detects misfeeds.
S46 Relay Detects misfeeds.
S47
S48
Registration
Guide Plate Position
Detects misfeeds and controls registration clutch
on/off timin g.
Detects whether the registration guide plate is open
or closed.
Overall
Information
1-15
ELECTRICAL COMPONENT DESCRIPTIONS 22 October 1999
Symbol Name Function
S49
Oil Supply/Cleaning
Web End
Detects when the oil supply/cleaning web has been
used up.
S50 Fusing Exit Detects misfeeds.
S51 Exit Detects misfeeds.
Switches
SW1
SW2
SW3
SW4
SW5
SW6
SW7
SW8
SW9
SW10
SW11
Main Power Provides power to the machine. If this is off, there is
no power supplied to the machine.
Right Front Door
Safety 1
Right Front Door
Safety 2
Right Front Door
Cuts the +24 V dc power line for the fusing/duplex
motor.
Detects if the front door is open or not, and cuts the
+24 V dc power line for the IOB.
Cuts the +5 V LD dc power line.
Safety 3
Right Front Door
Cuts the +5 V LD dc power line.
Safety 4
Left Front Door
Safety 1
Left Front Door
Safety 2
Left Front Door
Cuts the +24 V dc power line for the fusing/duplex
motor.
Detects if the front door is open or not, and cuts the
+24 V dc power line for the IOB.
Cuts the +5 V LD dc power line.
Safety 3
Left Front Door
Cuts the +5 V LD dc power line.
Safety 4
2nd Tray Paper Size Determines the size of paper in tray 2. Also detects
when the tray has been placed in the machine.
3rd Tray Paper Size Det er m ines the size of paper in tray 3. Also detects
when the tray has been placed in the machine.
Solenoids
SOL1
SOL2
SOL3
SOL4
SOL5
SOL6
SOL7
SOL8
SOL9
Transfer Belt Lift Controls the up-down movement of the transfer belt
unit.
1st Pick-up Controls the up-down movement of the pick-up roller
in tray 1.
2nd Pick-up
Controls the up-down movement of the pick-up roller
in tray 2.
3rd Pick-up
Controls the up-down movement of the pick-up roller
in tray 3.
1st Separation
Roller
2nd Separation
Roller
3rd Separation
Roller
Controls the up-down movement of the separation
roller in tray 1.
Controls the up-down movement of the separation
roller in tray 2.
Controls the up-down movement of the separation
roller in tray 3.
Front Side Fence Opens and closes the front side fence in the tandem
tray.
Rear Side Fence Opens and closes the rear side fence in the tandem
tray.
1-16
22 October 1999 ELECTRICAL COMPONENT DESCRIPTIONS
Symbol Name Function
SOL10
SOL11
SOL12
SOL13
SOL14
SOL15
SOL16
Tandem Tray
Connect
Left 1st Tray Lock Locks the left tandem tray while paper is being
Duplex Inverter Gate
Reverse Roller Controls the up-down movement of the reverse roller
Inverter Guide Plate Controls the up-down movement of the inverter feed
Guide Plate
Inverter Gate Moves the junction gate to direct copies to the
Connects/disconnects the two halves of the tandem
tray.
transported from left tray to right tray.
Moves the junction gate to direct copies to the duplex
tray or to the paper exit.
in the duplex unit.
guide plate in the duplex unit.
Opens the guide plate when a paper misfeed occurs
around this area.
duplex/inverter unit or to the paper exit unit.
Magnetic Clutches
MC1
MC2
Toner Supply Coil Transfers drive from the toner bank motor to the toner
transport coil, to transport toner towards the hopper.
Toner Supply Roller
Turns the toner supply roller to supply toner from the
toner hopper to the development unit.
MC3 1st Paper Feed Starts paper feed from tray 1.
MC4 2nd Paper Feed Starts paper feed from tray 2.
MC5 3rd Paper Feed Starts paper feed from tray 3.
MC6
MC7
MC8
MC9
MC10
MC11
MC12
MC13
MC14
Inverter Exit Roller
Duplex Transport Drives the duplex transport rollers to transport the
Duplex Feed Starts paper feed out of the duplex tray back into the
1st Vertical
Transport
2nd Vertical
Transport
3rd Vertical
Transport
Upper Relay
LCT Relay Drives the relay rollers for paper feed into the
Lower Relay Drives the lower relay rollers (between paper trays 1
Releases the drive from the inverter exit roller in the
duplex unit.
paper to the duplex feed rollers.
machine via to the relay rollers.
Drives the 1st vertical transport rollers.
Drives the 2nd vertical transport rollers.
Drives the 3rd vertical transport rollers.
Drives the upper relay rollers (between tray1 and the
registration rol lers)
machine from the LCT.
and 2).
Overall
Information
PCBs
PCB1
PCB2
BCU (Base Engine
Control Unit)
SICU (Scanner
Image Control Unit)
Controls all base engine functions both directly and
through other control boards.
Controls image processing, the laser diode, and the
polygonal mirror motor.
1-17
ELECTRICAL COMPONENT DESCRIPTIONS 22 October 1999
Symbol Name Function
PCB3
PCB4
PCB5
PCB6
PSU
(Power Supply Unit)
IOB
(Input/Output Board)
SBU
(Sensor Board Unit)
MCU
(Motor Control Unit)
Provides dc power to the system and ac power to the
fusing lamp and heaters.
Controls the paper feed components.
Contains the CCD, and outputs a video signal to the
SBICU board.
Drives the scanner motor.
PCB7 Lamp Regulator Provides dc power to the exposure lamp.
PCB8
Polygonal Mirror
Motor Control
Drives and controls the polygonal mirror motor.
PCB9 LDB Controls the laser diode.
PCB10 AC Dr ive Drives the ac components.
PCB11 O per ation Panel Controls the components of the operation panel.
PCB12 O per ation Key Controls the operation switch.
Lamps
L1
Exposure Lamp Applies high intensity light to the original for
exposure.
L2 Fusing Lamp 1 Provides heat to the hot roller.
L3 Fusing Lamp 2 Provides heat to the hot roller.
L4 Fusing Lamp 3 Provides heat to the hot roller.
L5
Quenching Neutralizes any charge remaining on the drum
surface after cleaning.
Power Packs
PP1
Charge/bias/grid
Provides high voltage for the charge corona wires,
grid plate, and the development roller.
PP2 Transfer Pr ovides hig h voltage for the transfer belt.
Others
CB1
H1
Circuit Breaker Provides back-up high current protection for the
electrical components.
Optics
Anti-Condensation
Turns on when the main switch is off to prevent
moisture from forming on the optics.
(option)
H2
H3
H4
HDD1
HDD2
Drum (option) Turns on when the main switch is off to prevent
moisture from forming around the drum.
Tray Heater 1
(option)
Tray Heater 2
(option)
Turns on when the main switch is off to keep paper
dry in the paper tray.
Turns on when the main switch is off to keep paper
dry in the paper tray.
HDD Scanned image data is compressed and held here
temporarily.
HDD Scanned image data is compressed and held here
temporarily.
NF1 Noise Filter Removes noise from the power line.
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