Page 1
CONTENTS
CONTENTS
SAFETY AND IMPORTANT WARNING ITEMS .......... C-1
IMPORTANT NOTICE .................................................. C-1
DESCRIPTION ITEMS FOR DANGER, WARNING
AND CAUTION............................................................. C-1
SAFETY WARNINGS...................................................C-2
SAFETY INFORMATION .............................................C-4
IMPORTANT INFORMATION ...................................... C-4
SAFETY CIRCUITS .....................................................C-5
INDICATION OF WARNING ON THE MACHINE.........C-7
1.OUTLINE
OUTLINE OF SYSTEM ........................................... 1-1
7075 PRODUCT SPECIFICATIONS.......................1-2
CENTER CROSS-SECTIONAL VIEW .................... 1-4
DRIVE SYSTEM DIAGRAM....................................1-5
[1] Main Drive Section......................................1-5
[2] Drum Drive Section.....................................1-6
[3] Developing Drive Section............................ 1-7
[4] Paper Feed Drive Section........................... 1-8
[5] Tray 1 and 2 Paper Feed Drive Section...... 1-9
[6] Tray 3 Paper Feed Drive Section.............. 1-10
[7] Vertical Conveyance Drive Section........... 1-11
[8] Bypass Paper Feed Drive Section ............ 1-12
[9] Conveyance/Transfer and Separation Wire
Cleaning Drive Section .............................1-13
[10] ADU Conveyance Drive Section ............... 1-14
[11] Paper Exit Drive Section ........................... 1-15
[12] Toner Supply Drive ...................................1-16
[13] Optics Drive Section ................................. 1-17
[14] Web Drive Section ....................................1-18
2. UNIT EXPLANATION
EXTERNAL SECTION ........................................ 2-A-1
[1] Composition ............................................ 2-A-1
DRIVE SECTION ................................................ 2-B-1
[1] Composition ............................................ 2-B-1
[2] Mechanisms............................................ 2-B-1
[3] M1 (Main) Control ................................... 2-B-2
[4] M2 (Drum) Control .................................. 2-B-2
READ SECTION ................................................. 2-C-1
[1] Composition ............................................ 2-C-1
[2] Mechanisms............................................ 2-C-1
[3] M13 (Scanner Drive) Control ..................2-C-2
[4] Exposure control ..................................... 2-C-4
[5] Original Read Control ............................. 2-C-5
[6] APS Control ............................................2-C-5
[7] AE Control............................................... 2-C-7
WRITE UNIT ....................................................... 2-D-1
[1] Composition ............................................ 2-D-1
[2] Mechanisms............................................ 2-D-1
[3] M17 (Polygon ) Control ........................... 2-D-2
[4] Image Write Control ................................ 2-D-4
DRUM UNIT ........................................................ 2-E-1
[1] Composition ............................................ 2-E-1
[2] Mechanisms............................................ 2-E-1
[3] Separation Claw Control ......................... 2-E-2
[4] Paper Guide Plate Control ...................... 2-E-2
[5] Drum Potential Control............................ 2-E-3
[6] HTR1 (drum heater) Control ................... 2-E-4
CORONA UNIT SECTION .................................. 2-F-1
[1] Composition ............................................ 2-F-1
[2] Mechanisms............................................ 2-F-1
[3] Charging Control..................................... 2-F-2
1 OUTLINE
OPERATING INSTRUCTIONS
2
3 DIS./ASSEMBLY
Page 2
CONTENTS
1 OUTLINE
OPERATING INSTRUCTIONS
2
3 DIS./ASSEMBLY
[4] Transfer/Separation Control.................... 2-F-3
[5] M23 (Charger Cleaning ) Control........... 2-F-4
[6] M18 (Transfer/Separation Cleaning)
Control .................................................... 2-F-5
[7] PCL/TSL Control..................................... 2-F-6
DEVELOPING UNIT............................................ 2-G-1
[1] Composition ............................................ 2-G-1
[2] Mechanisms............................................ 2-G-1
[3] M3 (Developing Unit Drive) Control ........2-G-2
[4] Developing Bias Control .........................2-G-2
[5] Toner Density Control ............................. 2-G-3
[6] Dmax Control .......................................... 2-G-4
[7] Gradation Correction Control .................. 2-G-6
[8] Dot Diameter Correction Control.............2-G-7
[9] FM2 (Developing Suction) Control.......... 2-G-8
TONER SUPPLY UNIT ....................................... 2-H-1
[1] Composition ............................................ 2-H-1
[2] Mechanisms............................................ 2-H-1
[3] Toner Level Detection Control ................2-H-2
[4] M11 (Toner Supply 1) Control................. 2-H-4
CLEANING/TONER RECYCLE UNIT ...................2-I-1
[1] Composition ..............................................2-I-1
[2] Mechanisms.............................................. 2-I-1
[3] M14 (Blade) Control.................................. 2-I-2
TRAY 1/2 PAPER FEED UNIT............................. 2-J-1
[1] Composition ............................................. 2-J-1
[2] Mechanisms............................................. 2-J-1
[3] First Paper Feed Control.......................... 2-J-3
[4] Paper Up Drive Control............................ 2-J-5
[5] Paper Size Detection Control................... 2-J-7
[6] No paper detection control....................... 2-J-8
TRAY 3 PAPER FEED UNIT............................... 2-K-1
[1] Composition ............................................ 2-K-1
[2] Mechanisms............................................ 2-K-1
[3] First Paper Feed Control......................... 2-K-3
[4] Paper Up Drive Control........................... 2-K-4
[5] Paper Size Detection Control.................. 2-K-5
[6] No paper detection control...................... 2-K-5
BY-PASS TRAY ...................................................2-L-1
[1] Composition .............................................2-L-1
[2] Mechanisms............................................. 2-L-1
[3] First Paper Feed Control..........................2-L-2
[4] Paper Up/down Control............................2-L-3
[5] Paper Size Detection Control...................2-L-4
[6] No paper detection control....................... 2-L-5
VERTICAL PAPER CONVEYANCE SECTION ..2-M-1
[1] Composition ............................................2-M-1
[2] Mechanisms............................................ 2-M-1
[3] Vertical Paper Conveyance Control........ 2-M-2
ADU..................................................................... 2-N-1
[1] Composition ............................................ 2-N-1
[2] Mechanisms............................................ 2-N-2
[3] Loop/Second Paper Feed Control .......... 2-N-9
[4] Paper Conveyance Control................... 2-N-10
[5] Paper Reverse and Exit Control ........... 2-N-11
[6] ADU Paper Feed/Reversal Control....... 2-N-13
[7]
ADU Paper Conveyance/Feed Control..
FIXING UNIT ....................................................... 2-O-1
[1] Composition ............................................ 2-O-1
[2] Mechanisms............................................ 2-O-1
[3] M16 (Web Drive)..................................... 2-O-4
[4] Fixing Temperature Control ....................2-O-5
[5] SD3 (fixing guide) Control....................... 2-O-7
OTHER KINDS OF CONTROL ........................... 2-P-1
[1] Parts Energized when
the Main Switch is OFF........................... 2-P-1
[2] Parts that Operate when the Main Switch
is Turned ON........................................... 2-P-2
[3] Cooling Fan Control ................................ 2-P-3
[4] Operation Panel Control ......................... 2-P-6
[5] Counter Control....................................... 2-P-8
[6] Option Control......................................... 2-P-9
3. DISASSEMBLY/ASSEMBLY
EXTERNAL SECTION ........................................ 3-A-1
[1] Replacing Ozone Filters.......................... 3-A-1
[2] Removing and Reinstalling the External
Cover ...................................................... 3-A-1
[3] Removing and Reinstalling the Front
Right Door............................................... 3-A-2
[4] Removing and Reinstalling the Front
Left Door ................................................. 3-A-3
[5] Removing and Reinstalling the Operation
Panel....................................................... 3-A-3
DRIVE SECTION ................................................ 3-B-1
[1] Removing and Reinstalling the Drum
Motor....................................................... 3-B-1
[2] Removing and Reinstalling the Main
Motor....................................................... 3-B-2
READ SECTION ................................................. 3-C-1
[1] Screw that Must not be Removed/
Loosened ................................................3-C-1
[2] Removing and Reinstalling the CCD
Unit.......................................................... 3-C-1
[3] Replacing the Exposure Lamp................ 3-C-3
[4] Replacing and Reinstalling the Exposure
Unit.......................................................... 3-C-4
[5] Installing the Optics Wire ........................3-C-5
[6] Cleaning the Slit Glass and White Color
Reference Plate Glass ............................ 3-C-8
[7] Cleaning the Platen Glass ...................... 3-C-8
WRITE SECTION................................................ 3-D-1
[1] Removing and Reinstalling the Write
Unit.......................................................... 3-D-1
[2] Cleaning the Dust-proof Glass................ 3-D-2
[3] Removing and Reinstalling the Image
Control Board.......................................... 3-D-3
2-N-15
Page 3
CONTENTS
DRUM UNIT ........................................................ 3-E-1
[1] Removing and Reinstalling the Drum
Unit.......................................................... 3-E-1
[2] Cleaning and Installing the Coupling ...... 3-E-2
[3] Removing and Reinstalling the Drum
Temperature Sensor Board .................... 3-E-2
[4] Cleaning the Toner Control Sensor
Board ...................................................... 3-E-3
[5] Removing, Cleaning and Reinstalling
the Drum ................................................. 3-E-4
[6] Removing and Reinstalling the Separation
Claws ...................................................... 3-E-5
CORONA UNIT SECTION .................................. 3-F-1
[1] Screws that Must not be Removed/
Loosened ................................................ 3-F-1
[2] Removing and Reinstalling the Charging
Corona Unit............................................. 3-F-1
[3] Removing and Reinstalling the Charge
Control Plate ........................................... 3-F-2
[4] Replacing the Charging Wires ................ 3-F-2
[5] Removing and Reinstalling the Charging
Wire Cleaning Pad .................................. 3-F-3
[6] Removing and Reinstalling the PCL ....... 3-F-3
[7] Cleaning the Charging Corona Unit/
PCL ......................................................... 3-F-4
[8] Removing and Reinstalling the Transfer/
Separation Corona Unit .......................... 3-F-4
[9] Removing and Reinstalling the Plunger
Prevention Plate...................................... 3-F-5
[10] Replacing the Transfer/Separation Wires,
Transfer/Separation Wire Cleaning Block
and Support Rubbers.............................. 3-F-5
[11] Removing and Reinstalling the TSL
Unit.......................................................... 3-F-7
DEVELOPING UNIT............................................ 3-G-1
[1] Screws that must not be Removed/
Loosened ................................................3-G-1
[2] Removing and Reinstalling the Developing
Unit..........................................................3-G-1
[3] Replacing the Developer......................... 3-G-2
[4] Removing and Reinstalling the Developing
Suction Filter ........................................... 3-G-4
TONER SUPPLY UNIT ....................................... 3-H-1
[1] Replacing and Cleaning the Toner
Cartridge .................................................3-H-1
[2] Drawing out the Toner Supply Unit ......... 3-H-1
[3] Removing and Reinstalling the Toner
Supply Sleeves 1 and 2 ..........................3-H-2
[4] Removing and Reinstalling the Toner
Supply Unit.............................................. 3-H-3
CLEANING/TONER RECYCLE UNIT ...................3-I-1
[1] Removing and Reinstalling the Cleaning/
Toner Recycle Unit ...................................3-I-1
[2] Cleaning the Cleaning/Toner Recycle
Unit............................................................3-I-2
[3] Removing and Reinstalling the Cleaning
Blade......................................................... 3-I-2
[4] Removing and Reinstalling the Toner Guide
Brush and Plunger Prevention Felt ...........3-I-4
[5] Replacing Guide Plate Assembly..............3-I-6
PAPER FEED UNITS OF TRAYS 1 AND 2 .........3-J-1
[1] Removing and Reinstalling Paper Feed
Trays 1 and 2 ........................................... 3-J-1
[2] Removing and Reinstalling the Front
Covers of Trays 1 and 2...........................3-J-1
[3] Cleaning the Paper Dust Removing
Brush........................................................3-J-2
[4] Cleaning the Paper Pre-registration PS/
Paper Feed PS ........................................3-J-2
[5] Removing and Reinstalling the Paper
Feed Roller and the Feed Roller.............. 3-J-3
[6] Removing and Reinstalling the Double
Feed Prevention Roller ............................3-J-4
[7] Replacing the Pre-registration and the
Feed Clutches (MCs) ............................... 3-J-5
[8] Removing and Reinstalling the Up/Down
Unit...........................................................3-J-5
[9] Replacing the Up/Down Plate Wires........ 3-J-6
TRAY 3 PAPER FEED UNIT............................... 3-K-1
[1] Removing and Reinstalling the Paper Feed
Tray 3...................................................... 3-K-1
[2] Removing and Reinstalling the Front Cover
of Paper Tray 3 ....................................... 3-K-1
[3] Cleaning the Paper Dust Removing
Brush....................................................... 3-K-2
[4] Cleaning the Paper Pre-registration PS/
the Paper Feed PS ................................. 3-K-2
[5] Removing and Reinstalling the Paper Feed
Roller and the Feed Roller ...................... 3-K-3
[6] Removing and Reinstalling the Double Feed
Prevention Roller .................................... 3-K-4
[7] Replacing the Pre-registration MC3 (MC8)
and the Feed MC3 (MC7) ....................... 3-K-5
[8] Removing and Reinstalling the Up/Down
Unit.......................................................... 3-K-5
[9] Replacing the Up/Down Plate Wires....... 3-K-6
BY-PASS TRAY ...................................................3-L-1
[1] Removing and Reinstalling the By-pass
Tray.......................................................... 3-L-1
[2] Cleaning the Paper Size Detection
Sensors.................................................... 3-L-1
[3] Replacing the Paper Feed Roller/the Feed
Roller Rubbers .........................................3-L-2
[4] Replacing the Double Feed Prevention
Roller Rubber........................................... 3-L-2
VERTICAL CONVEYANCE SECTION................3-M-1
[1] Removing and Reinstalling the Vertical
Conveyance Section ...............................3-M-1
[2] Removing and Reinstalling the Vertical
Conveyance MC (MC9, MC10)............... 3-M-1
1 OUTLINE
OPERATING INSTRUCTIONS
2
3 DIS./ASSEMBLY
Page 4
CONTENTS
1 OUTLINE
OPERATING INSTRUCTIONS
2
3 DIS./ASSEMBLY
[3] Replacing the Vertical Conveyance Roller
(Upper).................................................... 3-M-2
[4] Removing and Reinstalling the Vertical
Conveyance Rollers (Middle/Lower) .......3-M-2
[5] Cleaning the Vertical Conveyance PS/
Loop PS ..................................................3-M-3
ADU UNIT ........................................................... 3-N-1
[1] Drawing out and Reinstalling the ADU
Stand....................................................... 3-N-1
[2] Cleaning the Paper Dust Removing Brush
for Registration Roller .............................3-N-1
[3] Cleaning the Paper Dust Removing
Brushes for the Registration Roller ......... 3-N-2
[4] Cleaning PS44 (Registration PS)............ 3-N-2
[5] Cleaning Paper Mis-centering PS (PS1)/
Leading Edge Detection PS (PS45)........ 3-N-3
[6] Cleaning Paper Reverse PS (PS57)/ADU
Deceleration PS (PS59).......................... 3-N-3
[7] Removing and Reinstalling the ADU
Cover ...................................................... 3-N-4
[8] Removing and Reinstalling Registration
MC (MC1) ............................................... 3-N-5
[9] Removing and Reinstalling ADU Pre-
registration MC (MC2)............................. 3-N-6
[10] Removing and Reinstalling the Second
Paper Feed Unit...................................... 3-N-6
[11] Removing and Reinstalling the ADU
Stand....................................................... 3-N-7
[12] Removing and Reinstalling the Registration
Roller....................................................... 3-N-9
[13] Removing and Reinstalling the Registration
Motor (M12) Assembly.......................... 3-N-10
[14] Removing and Reinstalling the Loop
Roller, ADU Paper Exit Roller, and
Pre-registration Roller ........................... 3-N-11
[15] Removing and Reinstalling the Pre-transfer
Roller and Pre-registration Loop
Roller..................................................... 3-N-12
[16] Removing and Reinstalling the ADU
Reverse Roller ......................................3-N-15
[17] Removing and Reinstalling the ADU Stand
Drive Board Assembly .......................... 3-N-16
[18] Removing and Reinstalling the ADU
Horizontal Conveyance Rollers
1 and 2 .................................................. 3-N-17
[19] Removing and Reinstalling the Paper
Reverse/Exit Rollers 1, 2, and 3 ........... 3-N-19
[20] Removing and Reinstalling the Paper
Reverse/Exit Unit Entrance Roller ........ 3-N-21
[21] Removing and Reinstalling the Paper
Reverse/Exit Switchover Gate .............. 3-N-22
[22] Removing and Reinstalling the Paper Exit
Roller..................................................... 3-N-24
FIXING UNIT ....................................................... 3-O-1
[1] Removing and Reinstalling the Fixing
Unit..........................................................3-O-1
[2] Removing and Reinstalling the Fixing Unit
Top Cover ...............................................3-O-1
[3] Replacing the Cleaning Web ..................3-O-2
[4] Replacing the Fixing Heater Lamps
(Upper Roller) (L2, L3) ............................ 3-O-2
[5] Removing and Reinstalling the Fixing
Upper Roller............................................ 3-O-3
[6] Removing and Reinstalling the Fixing
Lower Roller............................................ 3-O-4
[7] Removing and Reinstalling the Fixing
Heat Roller Assembly .............................3-O-4
[8] Replacing the Heater Lamp (Lower)
(L4)..........................................................3-O-5
[9] Removing and Reinstalling the Fixing
Heat Roller .............................................. 3-O-6
[10] Removing and Reinstalling the Cleaning
Roller.......................................................3-O-7
[11] Removing and Reinstalling the Fixing
Separation Claws (Lower)....................... 3-O-7
[12] Removing and Reinstalling the Fixing
Separation Claws (Upper)....................... 3-O-8
[13] Removing and Reinstalling the Actuator for
Fixing Exit PS (PS2) ...............................3-O-8
[14] Removing and Reinstalling Fixing Temper-
ature Sensors 1 and 2.............................3-O-9
[15] Removing and Reinstalling Fixing Temper-
ature Sensors 3 and 4...........................3-O-10
[16] Removing and Reinstalling the Thermostat
(Upper).................................................. 3-O-12
[17] Removing and Reinstalling the Thermostat
(Lower).................................................. 3-O-14
DF-313
LT-401
FIELD SERVICE
INSTRUCTION MANUAL
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