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FT1008/FT1208
(Plover, A226/A227)
Service Manual
Issued April 8, 1998, Ricoh CO., LTD.
IMPORTANT SAFETY NOTES
PREVENTION OF PHYSICAL INJURY
1. Before disassembling or assembling any parts of the copier, make sure that the
power cord is unplugged.
2. The wall outlet should be near the copier and easily accessible.
3. 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.
4. If the Start key is pressed before the copier completes the warm-up period the
Ready indicator will alternately light green and red. When in this condition, keep
hands away from mechanical and electrical components, as the copier will start
making copies as soon as the warm-up period is completed.
5. 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. 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.
2. Never operate the copier without the ozone filter installed.
OBSERVANCE OF ELECTRICAL SAFETY STANDARDS
1. The copier must be maintained by a trained customer service representative.
SAFETY AND ECOLOGICAL NOTES FOR DISPOSAL
1. Do not incinerate the CTDM. Toner dust may ignite suddenly when exposed to
open flame.
2. Dispose of the CTDM and organic photoconductor in accordance with local
regulations. (These are non-toxic supplies.)
3. Dispose of replaced parts in accordance with local regulations.
TABLE OF CONTENTS
1. OVERALL MACHINE INFORMATION ........................................ 1-1
1.1 SPECIFICATIONS .................................................................................... 1-1
1.2 COPY PROCESSES AROUND THE DRUM ............................................ 1-3
1.3 MECHANICAL COMPONENT LAYOUT................................................... 1-5
1.4 ELECTRICAL COMPONENT LAYOUT .................................................... 1-6
1.5 ELECTRICAL COMPONENT DESCRIPTIONS........................................ 1-7
2. DETAILED DESCRIPTION.......................................................... 2-1
2.1 DRUM ....................................................................................................... 2-1
2.1.1 OPC DRUM CHARACTERISTICS................................................... 2-1
2.2 CHARGE .................................................................................................. 2-2
2.2.1 OVERVIEW ..................................................................................... 2-2
2.3 OPTICS .................................................................................................... 2-3
2.3.1 OVERVIEW ..................................................................................... 2-3
2.3.2 SCANNER DRIVE ........................................................................... 2-4
2.3.3 LENS AND 4TH/5TH MIRROR DRIVE (A227 MACHINE ONLY) .... 2-5
2.3.4 AUTOMATIC IMAGE DENSITY CONTROL SYSTEM (ADS) .......... 2-6
2.3.5 EXPOSURE LAMP VOLTAGE CONTROL ...................................... 2-7
2.4 ERASE.................................................................................................... 2-12
2.4.1 OVERVIEW ................................................................................... 2-12
2.4.2 LEAD EDGE ERASE ..................................................................... 2-13
2.4.3 SIDE ERASE (A227 MACHINES ONLY) ....................................... 2-13
2.4.4 TRAILING EDGE ERASE .............................................................. 2-13
2.5 DEVELOPMENT..................................................................................... 2-14
2.5.1 OVERVIEW ................................................................................... 2-14
2.5.2 TONER SUPPLY MECHANISM .................................................... 2-15
2.5.3 DEVELOMENT BIAS FOR IMAGE DENSITY CONTROL ............. 2-16
2.5.4 TONER END CONDITION............................................................. 2-18
2.6 IMAGE TRANSFER ................................................................................ 2-20
2.7 DRUM CLEANING.................................................................................. 2-21
2.8 QUENCHING.......................................................................................... 2-22
2.9 PAPER FEED AND REGISTRATION..................................................... 2-23
2.9.1 OVERVIEW ................................................................................... 2-23
2.9.2 PAPER FEED MECHANISM ......................................................... 2-24
2.9.3 REGISTRATION MECHANISM ..................................................... 2-25
2.9.4 BY-PASS FEED............................................................................. 2-26
2.9.5 PAPER FEED AND MISFEED DETECTION TIMING.................... 2-27
2.10 IMAGE FUSING.................................................................................... 2-28
2.10.1 OVERVIEW ................................................................................. 2-28
2.10.2 FUSING LAMP CONTROL .......................................................... 2-29
2.10.3 FUSING LAMP CONTROL CIRCUIT........................................... 2-30
3. INSTALLATION........................................................................... 3-1
3.1 INSTALLATION REQUIREMENTS .......................................................... 3-1
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1.2.1 ENVIRONMENT .............................................................................. 3-1
1.2.2 MACHINE LEVEL ............................................................................ 3-1
1.2.3 MINIMUM SPACE REQUIREMENTS.............................................. 3-2
1.2.4 POWER REQUIREMENTS.............................................................. 3-2
3.2 MACHINE INSTALLATION....................................................................... 3-2
4. SERVICE TABLES ...................................................................... 4-1
4.1 SERVICE REMARKS ............................................................................... 4-1
4.1.1 GENERAL CAUTIONS .................................................................... 4-1
4.1.2 DRUM .............................................................................................. 4-1
4.1.3 CTDM (CLEANING TONER DEVELOPMENT MAGAZINE)............ 4-2
4.1.4 CHARGE CORONA UNIT ............................................................... 4-2
4.1.5 ERASE LAMP .................................................................................. 4-2
4.1.6 OPTICS ........................................................................................... 4-3
4.1.7 TRANSFER CORONA..................................................................... 4-3
4.1.8 FUSING UNIT .................................................................................. 4-3
4.1.9 PAPER FEED .................................................................................. 4-3
4.1.10 OTHERS ........................................................................................ 4-4
4.2 PROGRAM MODES ................................................................................. 4-5
4.2.1 BASIC OPERATION ........................................................................ 4-5
4.2.2 SP MODE ........................................................................................ 4-6
4.2.3 SP MODE QUICK REFERENCE TABLE......................................... 4-8
4.2.4 UP MODE AND SP MODE CROSS REFERENCE TABLE ............. 4-9
4.2.5 SERVICE PROGRAM MODE ........................................................ 4-10
4.2.6 CLEAR ALL MEMORY PROCEDURE........................................... 4-25
4.3 SERVICE TABLES ................................................................................. 4-26
4.3.1 VARIABLE RESISTORS................................................................ 4-26
4.4 SERVICE CALL CONDITIONS............................................................... 4-27
4.5 ERROR CODE FOR USER .................................................................... 4-32
5. SERVICE MAINTENANCE .......................................................... 5-1
5.1 MAINTENANCE ITEMS AND METHODS ................................................ 5-1
6. REPLACEMENT AND ADJUSTMENT........................................ 6-1
6.1 EXTERIOR ............................................................................................... 6-1
6.1.1 EXTERIOR COVER/EXPOSURE GLASS REMOVAL..................... 6-1
6.1.2 UPPER UNIT REMOVAL................................................................. 6-2
6.2 OPTICS .................................................................................................... 6-3
6.2.1 EXPOSURE LAMP REMOVAL........................................................ 6-3
6.2.2 1ST MIRROR REMOVAL ................................................................ 6-4
6.2.3 EXPOSURE LAMP THERMOFUSE REMOVAL.............................. 6-5
6.2.4 2ND AND 3RD MIRRORS REMOVAL............................................. 6-6
6.2.5 4TH MIRROR REMOVAL ................................................................ 6-7
6.2.6 5TH MIRROR REMOVAL (A227 MODEL)....................................... 6-8
6.2.7 5TH MIRROR REMOVAL (A226 MODEL)....................................... 6-9
6.2.8 LENS AND 4TH/5TH MIRROR POSITION ADJUSTMENT (A227
MODEL)................................................................................................... 6-10
6.2.9 LENS AND MIRROR MOTOR REMOVAL..................................... 6-11
6.2.10 SCANNER WIRE REMOVAL....................................................... 6-12
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6.3 AROUND THE DRUM UNIT ................................................................... 6-14
6.3.1 OPC DRUM REMOVAL ................................................................. 6-14
6.3.2 CHARGE CORONA UNIT REMOVAL ........................................... 6-15
6.3.3 ERASE LAMP REMOVAL ............................................................. 6-16
6.4 PAPER FEED ......................................................................................... 6-18
6.4.1 PAPER FEED CLUTCH REMOVAL .............................................. 6-18
6.4.2 PAPER FEED ROLLER REMOVAL .............................................. 6-19
6.4.3 REGISTRATION SOLENOID REMOVAL ...................................... 6-20
6.5 FUSING .................................................................................................. 6-21
6.5.1 FUSING UPPER UNIT REMOVAL ................................................ 6-21
6.5.2 PRESSURE ROLLER REMOVAL ................................................. 6-22
6.5.3 FUSING LAMP REMOVAL ............................................................ 6-23
6.5.4 HOT ROLLER STRIPPER PAWL REMOVAL................................ 6-24
6.5.5 HOT ROLLER REMOVAL ............................................................. 6-25
6.5.6 FUSING THERMISTOR REMOVAL .............................................. 6-26
6.5.7 FUSING THERMOFUSE REMOVAL............................................. 6-27
6.5.8 FUSING PRESSURE ADJUSTMENT............................................ 6-28
6.6 OTHERS................................................................................................. 6-29
6.6.1 TRANSFER CORONA UNIT REMOVAL ....................................... 6-29
6.6.2 MAIN MOTOR REMOVAL ............................................................. 6-30
6.6.3 OZONE FILTER REMOVAL .......................................................... 6-31
6.6.4 TONER END SENSOR REMOVAL ............................................... 6-32
6.6.5 POWER PACK REMOVAL ............................................................ 6-33
6.6.6 POWER PACK OUTPUT ADJUSTMENT...................................... 6-36
6.6.7 TRANSFER CORONA CURRENT ADJUSTMENT ....................... 6-37
6.6.8 GRID VOLTAGE ADJUSTMENT ................................................... 6-38
6.6.9 BIAS VOLTAGE ADJUSTMENT.................................................... 6-39
6.7 COPY QUALITY ADJUSTMENT ............................................................ 6-40
6.7.1 IMAGE DENSITY ADJUSTMENT.................................................. 6-40
6.7.2 REGISTRATION ADJUSTMENT ................................................... 6-44
6.7.3 LEAD EDGE ERASE MARGIN ADJUSTMENT ............................. 6-44
6.7.4 VERTICAL MAGNIFICATION ADJUSTMENT ............................... 6-45
6.7.5 HORIZONTAL MAGNIFICATION ADJUSTMENT (A227 ONLY) ... 6-45
6.7.6 FOCUS ADJUSTMENT (A227 ONLY)........................................... 6-46
6.7.7 PARALLELOGRAM IMAGE ADJUSTMENT.................................. 6-47
6.8 CONNECTOR LAYOUT ......................................................................... 6-48
6.8.1 MAIN CONTROL BOARD (MCB) .................................................. 6-48
6.8.2 POWER SUPPLY UNIT (PSU) ...................................................... 6-49
6.8.3 NOISE FILTER .............................................................................. 6-49
6.8.4 POWER PACK............................................................................... 6-50
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28 February 1998 SPECIFICATIONS
1. OVERALL MACHINE INFORMATION
Information
Overall
1.1 SPECIFICATIONS
Configuration: Desk top
Copy Process: Dry electrostatic transfer system
Originals: Sheet/Book
Original Size: Maximum: A4/8