Mita-Kyocera KM-1525 Service Manual

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SERVICE

MANUAL

Published in Mar.’01

842BV110

CAUTION

Danger of explosion if battery is incorrectly replaced. Replace only with the same or equivalent type recommended by the manufacturer. Dispose of used batteries according to the manufacturer’s instructions.

CAUTION

Double-pole/neutral fusing.

Safety precautions

This booklet provides safety warnings and precautions for our service personnel to ensure the safety of their customers, their machines as well as themselves during maintenance activities. Service personnel are advised to read this booklet carefully to familiarize themselves with the warnings and precautions described here before engaging in maintenance activities.

Safety warnings and precautions

Various symbols are used to protect our service personnel and customers from physical danger and to prevent damage to their property. These symbols are described below:

DANGER: High risk of serious bodily injury or death may result from insufficient attention to or incorrect

compliance with warning messages using this symbol.

WARNING:Serious bodily injury or death may result from insufficient attention to or incorrect compliance

with warning messages using this symbol.

CAUTION:Bodily injury or damage to property may result from insufficient attention to or incorrect

compliance with warning messages using this symbol.

Symbols

The triangle ( ) symbol indicates a warning including danger and caution. The specific point of attention is shown inside the symbol.

General warning.

Warning of risk of electric shock.

Warning of high temperature.

indicates a prohibited action. The specific prohibition is shown inside the symbol.

General prohibited action.

Disassembly prohibited.

indicates that action is required. The specific action required is shown inside the symbol.

General action required.

Remove the power plug from the wall outlet.

Always ground the copier.

1. Installation Precautions

WARNING

• Do not use a power supply with a voltage other than that specified. Avoid multiple connections to one outlet: they may cause fire or electric shock. When using an extension cable, always check

that it is adequate for the rated current. ............................................................................................

• Connect the ground wire to a suitable grounding point. Not grounding the copier may cause fire or electric shock. Connecting the earth wire to an object not approved for the purpose may cause explosion or electric shock. Never connect the ground cable to any of the following: gas pipes, lightning rods, ground cables for telephone lines and water pipes or faucets not approved by the

proper authorities. .............................................................................................................................

CAUTION:

• Do not place the copier on an infirm or angled surface: the copier may tip over, causing injury. .....

• Do not install the copier in a humid or dusty place. This may cause fire or electric shock. ..............

• Do not install the copier near a radiator, heater, other heat source or near flammable material.

This may cause fire. ..........................................................................................................................

• Allow sufficient space around the copier to allow the ventilation grills to keep the machine as cool

as possible. Insufficient ventilation may cause heat buildup and poor copying performance. ..........

• Always handle the machine by the correct locations when moving it. ..............................................

• Always use anti-toppling and locking devices on copiers so equipped. Failure to do this may

cause the copier to move unexpectedly or topple, leading to injury..................................................

• Avoid inhaling toner or developer excessively. Protect the eyes. If toner or developer is accidentally ingested, drink a lot of water to dilute it in the stomach and obtain medical attention immediately. If it gets into the eyes, rinse immediately with copious amounts of water and obtain

medical attention. ..............................................................................................................................

• Advice customers that they must always follow the safety warnings and precautions in the copier’s

instruction handbook. ........................................................................................................................

2. Precautions for Maintenance

WARNING

• Always remove the power plug from the wall outlet before starting machine disassembly...............

• Always follow the procedures for maintenance described in the service manual and other related

brochures. .........................................................................................................................................

• Under no circumstances attempt to bypass or disable safety features including safety

mechanisms and protective circuits. .................................................................................................

• Always use parts having the correct specifications...........................................................................

• Always use the thermostat or thermal fuse specified in the service manual or other related brochure when replacing them. Using a piece of wire, for example, could lead to fire or other

serious accident. ...............................................................................................................................

• When the service manual or other serious brochure specifies a distance or gap for installation of a

part, always use the correct scale and measure carefully. ...............................................................

• Always check that the copier is correctly connected to an outlet with a ground connection. ............

• Check that the power cable covering is free of damage. Check that the power plug is dust-free. If

it is dirty, clean it to remove the risk of fire or electric shock. ............................................................

• Never attempt to disassemble the optical unit in machines using lasers. Leaking laser light may

damage eyesight...............................................................................................................................

• Handle the charger sections with care. They are charged to high potentials and may cause

electric shock if handled improperly. .................................................................................................

CAUTION

• Wear safe clothing. If wearing loose clothing or accessories such as ties, make sure they are

safely secured so they will not be caught in rotating sections...........................................................

• Use utmost caution when working on a powered machine. Keep away from chains and belts. .......

• Handle the fixing section with care to avoid burns as it can be extremely hot. .................................

• Check that the fixing unit thermistor, heat and press rollers are clean. Dirt on them can cause

abnormally high temperatures...........................................................................................................

• Do not remove the ozone filter, if any, from the copier except for routine replacement....................

• Do not pull on the AC power cord or connector wires on high-voltage components when removing

them; always hold the plug itself. ......................................................................................................

• Do not route the power cable where it may be stood on or trapped. If necessary, protect it with a

cable cover or other appropriate item. ..............................................................................................

• Treat the ends of the wire carefully when installing a new charger wire to avoid electric leaks........

• Remove toner completely from electronic components. ...................................................................

• Run wire harnesses carefully so that wires will not be trapped or damaged. ...................................

• After maintenance, always check that all the parts, screws, connectors and wires that were

removed, have been refitted correctly. Special attention should be paid to any forgotten

connector, trapped wire and missing screws. ..................................................................................

• Check that all the caution labels that should be present on the machine according to the

instruction handbook are clean and not peeling. Replace with new ones if necessary. ...................

• Handle greases and solvents with care by following the instructions below: ....................................

· Use only a small amount of solvent at a time, being careful not to spill. Wipe spills off completely.

· Ventilate the room well while using grease or solvents.

· Allow applied solvents to evaporate completely before refitting the covers or turning the main switch on.

· Always wash hands afterwards.

• Never dispose of toner or toner bottles in fire. Toner may cause sparks when exposed directly to

fire in a furnace, etc...........................................................................................................................

• Should smoke be seen coming from the copier, remove the power plug from the wall outlet

immediately. ......................................................................................................................................

3. Miscellaneous

WARNING

• Never attempt to heat the drum or expose it to any organic solvents such as alcohol, other than

the specified refiner; it may generate toxic gas.................................................................................

CONTENTS

1-1 Specifications

1-1-1 Specifications ....................................................................................................................................... 1-1-1

1-1-2 Parts names and their functions........................................................................................................... 1-1-2

(1) Copier ............................................................................................................................................. 1-1-2

(2) Operation panel .............................................................................................................................. 1-1-3

1-1-3 Machine cross section.......................................................................................................................... 1-1-4

1-1-4 Drive system ........................................................................................................................................ 1-1-5

(1) Drive system 1 (optical section) ...................................................................................................... 1-1-5

(2) Drive system 2 (drive motor drive train) .......................................................................................... 1-1-6

1-2 Handling Precautions

1-2-1 Drum .................................................................................................................................................... 1-2-1

1-2-2 Developer and toner............................................................................................................................. 1-2-1

1-2-3 Installation environment ....................................................................................................................... 1-2-1

1-3 Installation

1-3-1 Unpacking and installation ................................................................................................................... 1-3-1

(1) Installation procedure ..................................................................................................................... 1-3-1

1-3-2 Setting initial copy modes .................................................................................................................. 1-3-12

1-3-3 Copier management........................................................................................................................... 1-3-13

(1) Using the copier management mode ............................................................................................ 1-3-13

(2) Copy default ................................................................................................................................. 1-3-14

1-3-4 Installing the total counter (option) ..................................................................................................... 1-3-16

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1-4 Maintenance Mode

1-4-1 Maintenance mode............................................................................................................................... 1-4-1

(1) Executing a maintenance item ....................................................................................................... 1-4-1

(2) Maintenance mode item list ............................................................................................................ 1-4-2

(3) Contents of maintenance mode items ............................................................................................ 1-4-4

1-5 Troubleshooting

1-5-1 Paper misfeed detection ...................................................................................................................... 1-5-1

(1) Paper misfeed indication ................................................................................................................ 1-5-1

(2) Paper misfeed detection conditions ................................................................................................ 1-5-2

(3) Paper misfeeds ............................................................................................................................... 1-5-5

1-5-2 Self-diagnosis....................................................................................................................................... 1-5-7

(1) Self-diagnostic function .................................................................................................................. 1-5-7

(2) Self-diagnostic codes ..................................................................................................................... 1-5-7

1-5-3 Image formation problems ................................................................................................................. 1-5-11

(1) No image appears (entirely white). ............................................................................................... 1-5-12

(2) No image appears (entirely black). ............................................................................................... 1-5-12

(3) Image is too light. ......................................................................................................................... 1-5-13

(4) Background is visible. ................................................................................................................... 1-5-13

(5) A white line appears longitudinally. .............................................................................................. 1-5-13

(6) A black line appears longitudinally. .............................................................................................. 1-5-14

(7) A black line appears laterally. ....................................................................................................... 1-5-14

(8) One side of the copy image is darker than the other. ................................................................... 1-5-14

(9) Black dots appear on the image. .................................................................................................. 1-5-15

(10) Image is blurred............................................................................................................................ 1-5-15

(11) The leading edge of the image is consistently misaligned with the original. ................................ 1-5-15

(12) The leading edge of the image is sporadically misaligned with the original. ................................ 1-5-16

(13) Paper creases. ............................................................................................................................. 1-5-16

(14) Offset occurs. ............................................................................................................................... 1-5-16

(15) Image is partly missing................................................................................................................. 1-5-17

(16) Fixing is poor. ............................................................................................................................... 1-5-17

1-1-1

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(17) Image is out of focus. ................................................................................................................... 1-5-17

(18) Image center does not align with the original center. ................................................................... 1-5-17

(19) Image is not square...................................................................................................................... 1-5-18

(20) Image contrast is low (carrier scattering)...................................................................................... 1-5-18

1-5-4 Electrical problems ............................................................................................................................. 1-5-19

(1) The machine does not operate when the main switch is turned on. ............................................. 1-5-19

(2) The drive motor does not operate (C200). ................................................................................... 1-5-19

(3) The scanner motor does not operate. .......................................................................................... 1-5-19

(4) The toner feed motor does not operate. ....................................................................................... 1-5-19

(5) Cooling fan motor 1 does not operate. ......................................................................................... 1-5-19

(6) Cooling fan motor 2 does not operate. ......................................................................................... 1-5-19

(7) Cooling fan motor 3 does not operate. ......................................................................................... 1-5-20

(8) The registration clutch does not operate. ..................................................................................... 1-5-20

(9) The paper feed clutch does not operate. ...................................................................................... 1-5-20

(10) The bypass paper feed clutch does not operate. ......................................................................... 1-5-20

(11) The cleaning lamp does not turn on. ............................................................................................ 1-5-20

(12) The exposure lamp does not turn on............................................................................................ 1-5-20

(13) The exposure lamp does not turn off............................................................................................ 1-5-20

(14) The fixing heater does not turn on (C610).................................................................................... 1-5-20

(15) The fixing heater does not turn off................................................................................................ 1-5-20

(16) Main charging is not performed (C510)........................................................................................ 1-5-21

(17) Transfer charging is not performed. ............................................................................................. 1-5-21

(18) No developing bias is output. ....................................................................................................... 1-5-21

(19) The message requesting paper to be loaded is shown when paper is present

in the drawer................................................................................................................................. 1-5-21

(20) A paper jam in the paper feed, paper conveying or fixing section is indicated

when the main switch is turned on. .............................................................................................. 1-5-21

(21) The message requesting covers to be closed is displayed when the front cover and

paper conveying unit are closed................................................................................................... 1-5-22

(22) Others........................................................................................................................................... 1-5-22

1-5-5 Mechanical problems ......................................................................................................................... 1-5-23

(1) No primary paper feed. ................................................................................................................. 1-5-23

(2) No secondary paper feed. ............................................................................................................ 1-5-23

(3) Skewed paper feed. ...................................................................................................................... 1-5-23

(4) The scanner does not travel. ........................................................................................................ 1-5-23

(5) Multiple sheets of paper are fed at one time.................................................................................. 1-5-23

(6) Paper jams. .................................................................................................................................. 1-5-23

(7) Toner drops on the paper conveying path. ................................................................................... 1-5-23

(8) Abnormal noise is heard. .............................................................................................................. 1-5-23

1-6 Assembly and Disassembly

1-6-1 Precautions for assembly and disassembly ......................................................................................... 1-6-1

(1) Precautions ..................................................................................................................................... 1-6-1

(2) Running a maintenance item .......................................................................................................... 1-6-2

1-6-2 Paper feed section ............................................................................................................................... 1-6-3

(1) Detaching and refitting the paper feed pulleys ............................................................................... 1-6-3

(2) Detaching and refitting the bypass paper feed pulley ..................................................................... 1-6-5

(3) Detaching and refitting the left registration cleaner assembly ........................................................ 1-6-7

(4) Detaching and refitting the right registration cleaner assembly ...................................................... 1-6-7

(5) Detaching and refitting the bypass paper width switch ................................................................... 1-6-8

(6) Adjustment after roller and clutch replacement .............................................................................. 1-6-9

(6-1) Adjusting the leading edge registration of image printing...................................................... 1-6-9

(6-2) Adjusting the center line of image printing........................................................................... 1-6-10

(6-3) Adjusting the margins for printing........................................................................................ 1-6-11

(6-4) Adjusting the amount of slack in the paper.......................................................................... 1-6-12

1-6-3 Optical section.................................................................................................................................... 1-6-13

(1) Detaching and refitting the exposure lamp ................................................................................... 1-6-13

1-1-2

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(2) Detaching and refitting the scanner wires .................................................................................... 1-6-14

(2-1) Detaching the scanner wires ............................................................................................... 1-6-14

(2-2) Fitting the scanner wires...................................................................................................... 1-6-15

(3) Detaching and refitting the laser scanner unit .............................................................................. 1-6-18

(4) Adjusting the skew and vertical shifting of the laser scanner unit ................................................ 1-6-20

(4-1) Adjusting the skew of the laser scanner unit ....................................................................... 1-6-20

(4-2) Adjusting the vertical shifting of the laser scanner unit........................................................ 1-6-21

(5) Detaching and refitting the ISU (reference) .................................................................................. 1-6-22

(6) Adjusting the position of the ISU (reference) ................................................................................ 1-6-24

(7) Adjusting the longitudinal squareness (reference) ....................................................................... 1-6-25

(8) Adjusting magnification of the scanner in the main scanning direction ........................................ 1-6-26

(9) Adjusting magnification of the scanner in the auxiliary scanning direction ................................... 1-6-27

(10) Adjusting the scanner leading edge registration........................................................................... 1-6-28

(11) Adjusting the scanner center line ................................................................................................. 1-6-29

(12) Adjusting the margins for scanning an original on the contact glass............................................ 1-6-30

1-6-4 Main charging section ........................................................................................................................ 1-6-31

(1) Detaching and refitting the charger assembly .............................................................................. 1-6-31

(2) Replacing the tungsten wire (reference) ....................................................................................... 1-6-32

1-6-5 Drum section ...................................................................................................................................... 1-6-34

(1) Detaching and refitting the drum .................................................................................................. 1-6-34

1-6-6 Developing section ............................................................................................................................. 1-6-35

(1) Adjusting the position of the doctor blade (reference) .................................................................. 1-6-35

1-6-7 Transfer section ................................................................................................................................. 1-6-36

(1) Detaching and refitting the transfer roller assembly ..................................................................... 1-6-36

1-6-8 Cleaning section................................................................................................................................. 1-6-37

(1) Detaching and refitting the cleaning blade ................................................................................... 1-6-37

(2) Detaching and refitting the drum separation claw assemblies ..................................................... 1-6-38

(3) Detaching and refitting the cleaning lower seal assembly ............................................................ 1-6-38

1-6-9 Fixing section ..................................................................................................................................... 1-6-39

(1) Detaching and refitting the fixing unit ........................................................................................... 1-6-39

(2) Detaching and refitting the fixing unit thermistor .......................................................................... 1-6-40

(3) Detaching and refitting the heat roller separation claws ............................................................... 1-6-40

(4) Detaching and refitting the fixing heater ....................................................................................... 1-6-41

(5) Detaching and refitting the heat roller ........................................................................................... 1-6-42

(6) Detaching and refitting the press roller ......................................................................................... 1-6-44

1-7 Requirements on PCB Replacement

1-7-1 Replacing the main PCB ...................................................................................................................... 1-7-1

1-7-2 Upgrading the firmware on the main PCB............................................................................................ 1-7-3

1-7-3 Adjustment-free variable resistors (VR) ............................................................................................... 1-7-4

2-1 Mechanical construction

2-1-1 Paper feed section ............................................................................................................................... 2-1-1

2-1-2 Main charging section .......................................................................................................................... 2-1-4

2-1-3 Optical section...................................................................................................................................... 2-1-6

(1) Original scanning ............................................................................................................................ 2-1-7

(2) Image printing ................................................................................................................................. 2-1-8

2-1-4 Developing section ............................................................................................................................. 2-1-10

(1) Formation of magnetic brush ........................................................................................................ 2-1-11

(2) Toner density detection by the toner sensor ................................................................................ 2-1-12

(3) Toner density control .................................................................................................................... 2-1-12

(4) Correcting the toner sensor control voltage .................................................................................. 2-1-13

(5) Correcting toner sensor output voltage ........................................................................................ 2-1-14

2-1-5 Transfer and separation section......................................................................................................... 2-1-15

2-1-6 Cleaning section................................................................................................................................. 2-1-17

2-1-7 Charge erasing section ...................................................................................................................... 2-1-18

2-1-8 Fixing section ..................................................................................................................................... 2-1-19

1-1-3

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2-2 Electrical Parts Layout

2-2-1 Electrical parts layout ........................................................................................................................... 2-2-1

(1) PCBs .............................................................................................................................................. 2-2-1

(2) Switches and sensors..................................................................................................................... 2-2-2

(3) Motors............................................................................................................................................. 2-2-3

(4) Other electrical components........................................................................................................... 2-2-4

2-3 Operation of the PCBs

2-3-1 Power source PCB ............................................................................................................................... 2-3-1

2-3-2 Main PCB ............................................................................................................................................. 2-3-3

2-3-3 CCD PCB ............................................................................................................................................. 2-3-8

2-3-4 Laser diode PCB .................................................................................................................................. 2-3-9

2-4 Appendixes

Timing chart No. 1 .......................................................................................................................................... 2-4-1

Timing chart No. 2 .......................................................................................................................................... 2-4-2

Timing chart No. 3 .......................................................................................................................................... 2-4-3

Timing chart No. 4 .......................................................................................................................................... 2-4-4

Maintenance parts list .................................................................................................................................... 2-4-5

Periodic maintenance procedures.................................................................................................................. 2-4-6

General wiring diagram .................................................................................................................................. 2-4-9

1-1-4

1-1-1 Specifications

Type ...............................................Desktop

Copying system..............................Indirect electrostatic system

Originals .........................................Sheets and books

Maximum size: A3

Original feed system ......................Fixed

Copy paper.....................................Drawer: Plain paper (64 – 80 g/m

Bypass table: Plain paper (60 – 160 g/m

Special paper: Transparencies, tracing paper and letterhead

Note: Use the bypass table for special paper.

Copying sizes.................................Maximum: A3

Minimum: A6R/Folio (When the bypass table is used)

Magnification ratios ........................ Manual mode: 50 – 200%, 1% increments

Copy speed ....................................At 100% magnification in copy mode:

A4: 15 copies/min.

A4R: 10 copies/min.

A3: 8 copies/min.

B5: 15 copies/min.

B5R: 10 copies/min.

B4 (257 × 364 mm): 8 copies/min.

First copy time................................ Within 5.5 seconds (A4, 100% magnification, drawer)

Warm-up time.................................Within 30 seconds (room temperature 20°C/68°F, 65% RH)

In preheat/energy saver mode: Within 30 seconds (room temperature 20°C/68°F,

65% RH) [priorty to power save]

In preheat/energy saver mode: Within 15 seconds (room temperature 20°C/68°F,

65% RH) [priorty to recovery]

Paper feed system ......................... Automatic feed

Capacity:

Drawers: 250 sheets

Manual feed

Capacity:

Bypass: 50 sheets (A4, A4R, B5, B5R, A5R, B6R, A6R)

25 sheets (A3, B4, Folio)

Continuous copying........................1 – 250 sheets

Photoconductor ..............................OPC (drum diameter 30 mm)

Charging system ............................ Single positive corona charging

Exposure light source.....................Semiconductor laser

Exposure scanning system ............ Polygon mirror

Developing system.........................Dry, reverse developing (magnetic brush)

Developer: 2-component, ferrite carrier and N29T black toner Toner density control: toner sensor

Toner replenishing: automatic from a toner cartridge

Transfer system ............................. Transfer roller

Fixing system ................................. Heat roller

Heat source: halogen heaters (910 W)

Control temperature: 180°C (at normal ambient temperature)

Abnormally high temperature protection device: 140°C thermostat

Fixing pressure: 49 N

Charge erasing system .................. Exposure by cleaning lamp

Cleaning system.............................Cleaning blade

Scanning system............................ Flat bed scanning by CCD image sensor

Resolution ...................................... 600 × 600 dpi

Light source....................................Inert gas lamp

Dimensions ....................................550 (W) × 560 (D) × 455 (H) mm

Weight............................................Approx. 38 kg

Floor requirements .........................891 (W) × 560 (D) mm

Functions........................................Self-diagnostics, preheat, automatic copy density control, enlargement/reduction

copy and photo mode

Power source ................................. 220 – 240 V AC, 50/60 Hz, 2.8 A

Power consumption .......................1080W

Option.............................................Total counter

)

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1-1-1

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1-1-2 Parts names and their functions

(1) Copier

Figure 1-1-1

1 Original cover 2 Operation panel 3 Paper conveying unit 4 Multi-Bypass 5 Insert guides 6 Support tray 7 T oner cartridge 8 Toner cartridge release lever 9 Waste toner tank 0 Waste toner tank release lever ! Cleaning shaft @ Front cover # Main switch $ Copy store section % Ejection section ^ Drawer & Platen * Original size scales ( Length adjustment plate ) Width adjustment lever ⁄ Drawer lift ¤ Handles for transport

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1-1-2

(2) Operation panel

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1 Start key (Indicator) 2 Stop/Clear key 3 Numeric keys 4 Reset key 5 Interrupt key (Indicator) 6 Energy Saver (preheat) key (Indicator) 7 Manual/Enter key 8 Copy quantity/magnification display 9 Zoom (+) key 0 Zoom (-) key ! Auto mode selection key/APS/AMS indicators @ Recall key (Indicator) # Paper Select key $ Drawer select indicators

Figure 1-1-2

% Misfeed location indicators ^ Paper size indicators & Original key * Original size indicators ( Misfeed indicator ) Add Paper indicator ⁄ Add Toner indicator ¤ Toner Disposal indicator ‹ Maintenance indicator › Copy exposure adjustment keys ﬁ Copy exposure indicators ﬂ Image mode selection key/Auto Exposure/Text

& Photo/Photo/Text indicators

1-1-3

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1-1-3 Machine cross section

Figure 1-1-3 Machine cross section

Light path Paper path

1-1-4

1 Paper feed section 2 Main charging section 3 Optical section 4 Developing section 5 Transfer and paper conveying section 6 Cleaning section 7 Charge erasing section 8 Fixing section

1-1-4 Drive system

(1) Drive system 1 (optical section)

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1 Scanner motor gear 2 Gear 44/16 3 Gear 26 4 Scanner wire drum

Figure 1-1-4

5 Scanner wire 6 Scanner wire pulley 7 Scanner wire pulley 8 Scanner wire pulley

As viewed from machine front

1-1-5

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(2) Drive system 2 (drive motor drive train)

„

—

‡

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As viewed from machine rear

)

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1 Drive motor gear 2 Gear 58/30 3 Gear 48/27 4 Gear 60 5 Drum gear 6 Transfer roller gear 7 Gear 52/30 8 Gear 32/16 9 Gear 32/16 0 Gear 20 ! Gear 20 @ Gear 20 # Idle gear 16

Figure 1-1-5

$ Bypass paper feed clutch gear % Gear 16 ^ Upper paper feed clutch gear & Gear 30 * Gear 26/14 ( Gear 20 ) Registration clutch gear ⁄ Gear 15 ¤ Gear 18 ‹ Gear 20 › Gear 34/23 ﬁ Gear 24 ﬂ Gear 15

‡ Spiral gear 17 — Blade thrust gear 21

· Gear 16 ‚ Idle gear Œ Gear 19 „ Gear 23 ´ Gear 23 ‰ Gear 29 ˇ Fixing gear 19 Á Heat roller gear 35 ¨ Idle gear ˆ Gear 21

1-1-6

1-2-1 Drum

Note the following when handling or storing the drum.

• When removing the image formation unit, never expose the drum surface to strong direct light.

• Keep the drum at an ambient temperature between –20°C/–4°F and 40°C/104°F and at a relative humidity not higher

than 85% RH. Avoid abrupt changes in temperature and humidity.

• Avoid exposure to any substance which is harmful to or may affect the quality of the drum.

• Do not touch the drum surface with any object. Should it be touched by hands or stained with oil, clean it.

• If the machine is left open for more than 5 minutes for maintenance, remove the drum and store it in the drum storage

bag (Part No. 78369020).

1-2-2 Developer and toner

Store the developer and toner in a cool, dark place. Avoid direct light and high humidity.

1-2-3 Installation environment

1.Temperature: 10 - 35°C/50 - 95°F

2.Humidity: 15 - 85%RH

3.Power supply: 220 - 240 V AC, 2.8 A

4.Power source frequency: 50 Hz ±0.3%/60 Hz ±0.3%

5.Installation location

• Avoid direct sunlight or bright lighting. Ensure that the photoconductor will not be exposed to direct sunlight or other strong light when removing paper jams.

• Avoid extremes of temperature and humidity, abrupt ambient temperature changes, and hot or cold air directed onto the machine.

• Avoid dust and vibration.

• Choose a surface capable of supporting the weight of the machine.

• Place the machine on a level surface (maximum allowance inclination: 1° ).

• Avoid air-borne substances that may adversely affect the machine or degrade the photoconductor, such as mercury, acidic of alkaline vapors, inorganic gasses, NOx, SOx gases and chlorine-based organic solvents.

• Select a room with good ventilation.

6.Allow sufficient access for proper operation and maintenance of the machine. Machine front: 1000 mm/39 Machine right: 700 mm/27

/8" Machine rear: 100 mm/4"

/8" Machine left: 600 mm/235/8"

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a: 455 mm/17 b: 550 mm/21

c: 718 mm/281/4" d: 560 mm/22 e: 930 mm/36

15 5

1 5

/16"

/8" /16"

/8"

f: 418 mm/167/16"

Figure 1-2-1 Installation dimensions

1-2-1

1-3-1 Unpacking and installation

(1) Installation procedure

Start

Unpack.

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Remove the tapes.

Remove the pins holding light source units 1 and 2.

Install the optional devices.

Remove the image formation unit.

Load developer.

Release the cleaning blade.

Install a waste toner tank.

Adjust the fixing pressure.

Connect the power cord.

Carry out initial developer setting

(maintenance item U130).

Load paper.

Output an own-status report

(maintenance item U000).

Exit maintenance mode.

Install a toner cartridge.

Make test copies.

Completion of the machine installation.

1-3-1

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Light source unit 1 pins

Light source unit 2 pin

Figure 1-3-1

1-3-2

Unpack.

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)

%&⁄

1 Copier 2 Outer case 3 Inner frame 4 Upper pads 5 Bottom pads 6 Bottom case 7 Skid 8 Bottom plate 9 Spacer* 0 Machine cover ! Original cover @ Plastic bag

Figure 1-3-2 Unpacking

# Bar code labels $ Hinge joint % Drawer size sheet ^ Plastic bag & Error code label* * Drawer spacers ( Drawer claw spacers ) Power cord ⁄ Paper storage bag

*1: 230 V specifications only. *2: Asia and Oceania specifications only.

1-3-3

2BV

Remove the tapes.

1. Remove the tape holding the front cover and the power cord, and remove the tape binding the power cord.

2. Remove the tape holding the drawer.

3. Remove the two tapes holding the paper conveying unit and bypass tray.

4. Remove the three tapes holding the pins for light source units 1 and 2.

Light source

unit 2 pin

Light source unit 1 pins

Power cord

Front cover Drawer

5. Pull the drawer out and remove the tape holding each of the drawer spacers and then the spacers.

6. Remove the tape holding the fulcrum of the drawer lift inside the drawer.

Fulcrum of the drawer lift

Bypass tray

Paper conveying unit

Figure 1-3-3

1-3-4

Drawer spacers

Figure 1-3-4

7. Remove the tape holding each of the front and rear cursors.

2BV

Rear cursor

Front cursor

Figure 1-3-5

8. Remove the tape holding each of the drawer claw spacers and then the spacers.

9. Refit the drawer.

Drawer claw spacers

Figure 1-3-6

1-3-5

2BV

Remove the pins holding light source units 1 and 2.

1. Remove the two pins for light source unit 1 and the pin for light source unit 2.

Light source unit 1 pins

Light source unit 2 pin

Figure 1-3-7

Remove the image formation unit.

1. Open the front cover, bypass tray and the paper conveying unit.

2. Remove the two screws and disconnect the 12pin connector. While pressing the hook on the front image formation cover, pull the image formation unit out.

12-pin Connector

Hook

Screws

Image formation unit

Figure 1-3-8

1-3-6

Load developer.

1. Remove the developing unit upper cover by pushing and lifting it in the direction of the arrow in the diagram. Caution: Be sure to place the image formation unit on a level surface when loading developer.

2. Shake the developer bottle well to agitate the developer.

3. While turning the magnet roller gear in the direction of the arrow in the diagram, uniformly pour developer into the image formation unit. Caution: Never turn the magnet roller gear in the reverse direction.

2BV

Developing unit

upper cover

Figure 1-3-9

4.Refit the developing unit upper cover.

Release the cleaning blade.

1.Remove the tape holding each of the two cleaning blade release levers. Apply the cleaning blade to the drum by gently pushing the cleaning blade release levers in the direction of the arrows in the diagram using a screwdriver.

•The cleaning blade comes into contact with the drum.

Developer

Cleaning blade release lever

Magnet roller gear

Figure 1-3-10

Tapes

Screwdriver

Figure 1-3-11

1-3-7

2BV

2.Check that the cleaning shaft is inserted as far as it will go.

3. Refit the image formation unit using the two screws.

4. Connect the 12-pin connector.

Install a waste toner tank.

1.While holding the waste toner tank release lever up, fit the waste toner tank in the copier.

12-pin connector

Figure 1-3-12

Waste toner tank release lever

2. Close the front cover.

Adjust the fixing pressure.

1. Remove the two blue screws.

2.Close the paper conveying unit and the bypass tray.

1-3-8

Waste toner tank

Figure 1-3-13

Blue screws

Figure 1-3-14

Connect the power cord.

1.Connect the power cord to the connector on the copier.

2.Insert the power plug into the wall outlet.

Carry out initial developer setting (maintenance item U130).

1.Turn the main switch on and enter the maintenance mode by entering “10871087” using the numeric keys.

2.Enter “130” using the numeric keys and press the start key.

3.Press the start key to execute the maintenance item. The drive stops within approximately 4 minutes and the toner feed start level and toner sensor control voltage are automatically set. Each time the copy exposure adjustment keys are pressed, the settings for INPUT, CONTROL, TARGET and HUMID are displayed on the copy quantity/magnification display in the order presented.

4.Press the stop/clear key.

Load paper.

1.Load paper in the drawer. Caution: Loading paper before turning the main switch on may cause paper jams.

Output an own-status report (maintenance item U000).

1.Enter “000” using the numeric keys and press the start key.

2.Select “d-L” and press the start key to output a list of the current settings of the maintenance items.

3.Press the stop/clear key.

2BV

Exit maintenance mode.

1. Enter "001" using the numeric keys and press the start key. The machine exits the maintenance mode.

1-3-9

2BV

Install a toner cartridge.

1. Open the front cover.

2.Shift the toner cartridge release lever to the right until it stops.

3.Tap the toner cartridge on the top five or six times and shake it horizontally eight to ten times to agitate the toner.

Toner cartridge release lever

Figure 1-3-15

4.Align the arrows on the top of the toner cartridge with the cutouts in the eject tray and then insert the cartridge into the copier.

5.Secure the toner cartridge by shifting the toner cartridge release lever to the left until it stops.

6. Close the front cover.

1-3-10

Figure 1-3-16

Cutouts

Toner cartridge

Figure 1-3-17

Make test copies.

1. Place an original and make test copies. Check if the center lines of the bypass tray and drawer are correct. If not, adjust the center lines.

Completion of machine installation.

2BV

1-3-11

2BV

1-3-2 Setting initial copy modes

Factory settings are as follows:

Maintenance item

No.

U253 Switching between double and single counts Double count Double count U254 Turning auto start function on/off On On U255 Setting auto clear time 90 s 90 s U256 Turning auto preheat/energy saver function on/off On On U258 Switching copy operation at toner empty Single mode, Single mode,

detection 70 sheets 70 sheets U260 Changing the copy count timing After ejection After ejection U342 Setting the ejection restriction On On U344 Setting preheat/energy saver mode Energy star Energy star U348 Setting the copy density adjustment range Special area Special area

Contents

Metric Inch

Factory setting

1-3-12

2BV

1-3-3 Copier management

In addition to a maintenance function for service, the copier is equipped with a management function which can be operated by users (mainly by the copier administrator). In this copier management mode, settings such as default settings can be changed.

(1) Using the copier management mode

• Executing a default setting item

Start

Press both of the copy exposure adjustment keys for 3 s.

Select an item using the zoom +/– keys or numeric keys.

Press the enter key.

Execute the default

setting item (page 1-3-14).

Select “F00” and

press the enter key.

End

1-3-13

2BV

(2) Copy default

User status report

Prints the details of the default settings.

1. Select “F01” and press the enter key. If A4 paper is present, the list is automatically printed out. Otherwise, select the paper source and press the start key.

Exposure mode

Selects the image mode at power-on.

1. Select “F02” and press the enter key.

2. Select the exposure mode and press the enter key. Exposure mode: 1 (auto exposure)/ 2 (text & photo)/3 (photo)/4 (text)

Exposure steps

Sets the number of exposure steps for the manual exposure mode.

1. Select “F03” and press the enter key.

2. Select “5 steps” or “9 steps” and press the enter key. Setting range: 1 (5 steps)/2 (9 steps)

Auto exposure adjustment

Adjusts the exposure for the auto exposure mode.

1. Select “F04” and press the enter key.

2. Select the setting and press the enter key. Setting range: 1 to 7

Text and photo original exposure adjustment

Adjusts the exposure to be used when text and photo original is selected for the image mode.

1. Select “F05” and press the enter key.

2. Select the setting and press the enter key. Setting range: 1 to 7

Text original exposure adjustment

Adjusts the exposure to be used when text original is selected for the image mode.

1. Select “F06” and press the enter key.

2. Select the setting and press the enter key. Setting range: 1 to 7

Photo original exposure adjustment

Adjusts the exposure to be used when photo original is selected for the image mode.

1. Select “F07” and press the enter key.

2. Select the setting and press the enter key. Setting range: 1 to 7

Paper selection

Sets whether the same sized paper as the original to be copied is automatically selected.

1. Select “F08” and press the enter key.

2. Select “auto” or “manual” and press the enter key. Setting range: 1 (auto)/2 (manual)

AMS mode

Selects whether auto magnification selection or 100% magnification is to be given priority when the sizes of the original and copy paper are different.

1. Select “F09” and press the enter key.

2. Select “auto magnification selection” or “same size” and press the enter key. Setting range: 1 (auto magnification selection)/ 2 (same size)

Drawer paper size

Sets the paper size for the drawer so that it will be automatically selected.

1. Select “F10” and press the enter key.

2. Select the paper size for the drawer and press the enter key. Paper size: 1 (A3)/2 (A4 vertical)/3 (A4)/ 4 (B4)/5 (B5 vertical)/6 (A5 vertical)/7 (folio)

Bypass tray paper size

Sets the paper size for the bypass tray so that it will be automatically selected.

1. Select “F11” and press the enter key.

2. Select the paper size for the bypass tray and press the enter key. Paper size: 1 (A3)/2 (A4 vertical)/3 (A4)/ 4 (B4)/5 (B5 vertical)/6 (B5)/7 (folio)/ 8 (no size setting*)

* Setting of non-standard size paper width for

bypass tray

Non-standard size paper width setting for bypass tray

Sets the paper width for the bypass tray to use non-standard size paper.

1. Select “F12” and press the enter key.

2. Enter the setting and press the enter key. Setting range: 100 to 297 mm

Copy limit

Sets the number of copies limit for multiple copying.

1. Select “F13” and press the enter key.

2. Enter the setting and press the enter key. Setting range: 1 to 250 copies

1-3-14

Silent mode

Selects whether or not to enter silent mode after copying.

1. Select “F14” and press the enter key.

2. Select “on” or “off” and press the enter key. Setting range: 1 (on)/2 (off)

Auto shutoff

Sets whether the auto shutoff function is available .

1. Select “F15” and press the enter key.

2. Select “on” or “off” and press the enter key. Setting range: 1 (on)/2 (off)

Auto preheat time

Sets the auto preheat time.

1. Select “F16” and press the enter key.

2. Select the setting and press the enter key. Setting range: 5 to 45 minutes (in 5-minute increments) 1 (5 min)/2 (10 min)/3 (15 min)/4 (20 min)/ 5 (25 min)/6 (30 min)/7 (35 min)/8 (40 min)/ 9 45 min) Note: Set the auto preheat time to be shorter than the auto shutoff time.

2BV

Auto shutoff time

Sets the auto shutoff time.

1. Select “F17” and press the enter key.

2. Select the setting and press the enter key. Setting range: 15 to 240 minutes (in 15-minute increments) 1 (15 min)/2 (30 min)/3 (45 min)/4 (60 min)/ 5 (75 min)/6 (90 min)/7 (105 min)/8 (120 min)/ 9 (135 min)/10 (150 min)/11 (165 min)/ 12 (180 min)/13 (195 min)/14 (210 min)/ 15 (225 min)/16 (240 min)

Toner counter report

Prints the report on the toner consumption ratio.

1. Select “F18” and press the enter key. If A4 paper is present, the list is automatically printed out. Otherwise, select the paper source and press the start key.

1-3-15

2BV

1-3-4 Installing the total counter (option)

Procedure

1. Remove the right cover and eject tray.

2. Remove the Lumirror (polyester film) from the right side of the copier.

3. Check the vertical orientation of the total counter and then insert it into the opening in the copier.

4. Connect the 2-pin connector of the total counter to the 2-pin connector inside the copier. Be sure to pass the cable of the total counter connector through the cutout in the copier inner frame.

5. Refit the removed parts.

6. Turn the main switch on and enter the maintenance mode.

7. Run maintenance item U204 and change the setting to “on”.

2-pin connector

Cutout

Total counter

Figure 1-3-18

1-3-16

1-4-1 Maintenance mode

The copier is equipped with a maintenance function which can be used to maintain and service the machine.

(1) Executing a maintenance item

Start

2BV

Enter 10871087.

Enter the number of the maintenance item to be executed using the zoom +/keys or numeric keys.

Press the start key.

The maintenance item is run.

Press the stop/clear key.

Yes

Run the item again?

· · · · · · · Entering the maintenance mode

· · · · · · · Selecting a maintenance item

Yes

Run another maintenance

mode?

Enter 001 using the zoom +/- keys or numeric keys, and press the print key.

End

· · · · · · · Exiting the maintenance mode

1-4-1

2BV

(2) Maintenance mode item list

Section

General

Initialization

Drive, paper feed, paper conveying and cooling system

Optical

High voltage

Developing

* Initial setting for executing maintenance item U020

Item

No. setting*

U000 Outputting an own-status report — U001 Exiting the maintenance mode — U004 Setting the machine number — U005 Copying without paper — U020 Initializing all data — U021 Initializing memories — U022 Initializing backup data — U030 Checking motor operation — U031 Checking switches for paper conveying — U032 Checking clutch operation — U033 Checking solenoid operation — U034 Adjusting the print start timing

• Adjusting the leading edge registration 0

• Adjusting the center line 0

U035 Setting folio size

• Length 330

• Width 210

U051 Adjusting the amount of slack in the paper

• Regist data 0

U053 Performing fine adjustment of the motor speed

• Drive motor 0

• Polygon motor 0 U060 Adjusting the scanner input properties 12 U061 Turning the exposure lamp on — U063 Adjusting the shading position 0 U065 Adjusting the scanner magnification

• Main scanning direction/auxiliary scanning direction 0 U066 Adjusting the leading edge registration for scanning an original on the 0

contact glass U067 Adjusting the center line for scanning an original on the contact glass 0 U073 Checking scanner operation — U088 Setting the input filter (moiré reduction mode) Off U089 Outputting a MIP-PG pattern — U091 Checking shading — U092 Adjusting the scanner automatically — U093 Setting the exposure density gradient

• Text/text and photo/photo mode 0 U100 Setting the surface potential 184 U101 Setting high voltages

• Developing bias 193/38

• Transfer voltage 115

• Transfer voltage output timing –176 U109 Setting the drum type H U110 Checking/clearing the drum count — U111 Checking/clearing the drum drive time — U130 Initial setting for the developer — U131 Setting the toner sensor control voltage 155 U132 Replenishing toner forcibly — U135 Checking toner feed motor operation — U155 Displaying the toner sensor output —

Maintenance item contents

1-4-2

Initial

2BV

Section

Developing

Fixing and cleaning

Operation panel and support equipment

Mode setting

Image processing

Others

Item

No. setting*

U156 Changing the toner control level

• Toner feed start level 100

• Toner empty level 44 U157 Checking/clearing the developing drive time — U158 Checking/clearing the developing count — U161 Setting the fixing control temperature

• Primary stabilization fixing temperature 135

• Secondary stabilization fixing temperature 160

• Regular stabilization control temperature 180

• Temperature to be deducted from the regular control temperature 0

when copying onto small-sized paper U162 Stabilizing fixing forcibly — U163 Resetting the fixing problem data — U196 Turning the fixing heater on — U199 Checking the fixing temperature — U200 Turning all LEDs on —

U204 Setting the presence or absence of a total counter —

U250 Setting the maintenance cycle 100 U251 Checking/clearing the maintenance count — U252 Setting the destination Japan U253 Switching between double and single counts Double count U254 Turning auto start function on/off On U255 Setting auto clear time 120 U256 Turning auto preheat/energy saver function on/off On U258 Switching copy operation at toner empty detection Single mode,

U260 Changing the copy count timing After ejection U332 Setting the size conversion factor — U342 Setting the ejection restriction On U344 Setting preheat/energy saver mode Energy star U345 Setting the value for maintenance due indication 0 U348 Setting the copy density adjustment range Normal U402 Adjusting margins of image printing — U403 Adjusting margins for scanning an original on the contact glass — U901 Checking/clearing copy counts by paper feed locations — U903 Checking/clearing the paper jam counts — U904 Checking/clearing the service call counts — U906 Resetting partial operation control — U910 Clearing the black ratio data — U917 Setting the reading/writing of backup data Read U990 Checking/clearing the time for the exposure lamp to light — U993 Outputting a VTC-PG pattern — U998 Outputting the memory list —

Maintenance item contents

Initial

* Initial setting for executing maintenance item U020

1-4-3

2BV

(3) Contents of maintenance mode items

Maintenance

item No. U000 Outputting an own-status report

Description

Outputs lists of the current settings of the maintenance items, and paper jam and service call occurrences.

Purpose

To check the current setting of the maintenance items, or paper jam or service call occurrences. Before initializing the backup RAM, output a list of the current settings of the maintenance items to reenter the settings after initialization or replacement.

Method

1. Press the start key. A selection item appears.

2. Select the item to be output using the copy exposure adjustment keys.

Display Output list

d-L List of the current settings of the maintenance modes J-L List of the paper jam occurrences C-L List of the service call occurrences

3. Press the start key. The interrupt copy mode is entered and a list is output.

When A4/11" × 8

/2" paper is available , a report of this size is output. If not, specify the paper f eed location.

When output is complete, the selected item appears.

Completion

Press the stop/clear key while a selection item is display ed. The indication for selecting a maintenance item No . appears.

U001 Exiting the maintenance mode

Description

Exits the maintenance mode and returns to the normal copy mode.

Purpose

To exit the maintenance mode.

Method

Press the start key. The normal copy mode is entered.

U004 Setting the machine number

Description

Displays and changes the machine number.

Purpose

To check or set the machine number.

Method

Press the start key. The currently set machine number is displayed.

Setting

1. Select the item by lighting a copy exposure indicator using the copy exposure adjustment keys.

2. Enter the last six digits of the machine number using the numeric or zoom +/– keys. Do not enter the first two digits, 3 and 7.

Copy exposure indicator Description Setting range Initial setting

Exp. 1 First 3 digits 000 to 999 000 Exp. 2 Last 3 digits 000 to 999 000

3. Press the start key. The machine number is set. The indication for selecting a maintenance item No. appears.

Completion

To exit this maintenance item without changing the current setting, press the stop/clear key. The indication for selecting a maintenance item No. appears.

Description

1-4-4

2BV

Maintenance

item No.

U005 Copying without paper

Description

Simulates the copy operation without paper feed.

Purpose

To check the overall operation of the machine.

Method

1. Press the start key. A selection item appears.

2. Select the item to be operated using the copy exposure adjustment keys.

Display Operation

P Only the copier operates.

3. Press the interrupt key.

4. Set the operation conditions required. Changes in the following settings can be made.

• Paper feed locations

• Magnifications

• Number of copies: continuous copying is performed when set to 250.

• Copy density

• Keys on the operation panel other than the energy saver (preheat) key

5. To control the paper feed pulley, remove all the paper in the drawers, or the drawers. With the paper present, the paper feed pulley does not operate.

6. Press the start key. The operation starts. Copy operation is simulated without paper under the set conditions. When operation is complete, the selected item appears.

7. To stop continuous operation, press the stop/clear key.

Completion

Press the stop/clear key at the screen for selecting an item. The indication f or selecting a maintenance item No . appears.

U020 Initializing all data

Description

Initializes all the backup RAM on the main PCB to return to the original settings.

Purpose

Used when replacing the main PCB.

Method

1. Press the start key.

2. Select “on” using the zoom +/– keys.

Display Operation

––– Canceling initialization on Executing initialization

3. Press the start key. All data in the backup RAM is initialized, and the original settings for Japan specifications are set. When initialization is complete, the machine automatically returns to the same status as when the main switch is turned on.

Completion

To exit this maintenance item without executing initialization, press the stop/clear key. The indication for selecting a maintenance item No. appears.

Description

1-4-5

2BV

Maintenance

item No. U021 Initializing memories

Description

Initializes the setting data other than that for adjustments due to variations between respective machines, i.e., settings for counters, service call history and mode settings. As a result, initializes the backup RAM according to the specifications depending on the destination selected in U252.

Purpose

Used to return the machine settings to the factory settings.

Method

1. Press the start key.

2. Select “on” using the zoom +/– keys.

Display Operation

––– Canceling initialization on Executing initialization

3. Press the start key. All data other than that for adjustments due to variations between machines is initialized based on the destination setting. When initialization is complete, the machine automatically returns to the same status as when the main switch is turned on.

Completion

Press the stop/clear key. The indication for selecting a maintenance item No. appears.

U022 Initializing backup data

Description

Initializes only the data set for the optical section.

Purpose

To be executed after replacing the scanner unit.

Method

1. Press the start key. “A” appears.

2. Press the start key.

3. Select “on” using the zoom +/– keys.

Display Operation

––– Canceling initialization on Executing initialization

4. Press the start key. The data for the optical section (U060 to 093, U403 and U990) is initialized.

Completion

Press the stop/clear key. The indication for selecting a maintenance item No. appears.

U030 Checking motor operation

Description

Drives the drive motor.

Purpose

To check the operation of the drive motor.

Method

1. Press the start key. A selection item appears.

2. Select the motor to be operated using the copy exposure adjustment keys.

3. Press the start key. The selected motor operates.

Display Motor

A Drive motor (DM)

4. To stop operation, press the stop/clear key.

Completion

Press the stop key after operation stops. The indication for selecting a maintenance item No. appears.

Description

1-4-6

2BV

Maintenance

item No.

U031 Checking switches for paper conveying

Description

Displays the on-off status of each paper detection switch on the paper path.

Purpose

To check if the switches for paper conveying operate correctly.

Method

1. Press the start key.

2. Tur n each switch on and off manually to check the status. When the on-status of a switch is detected, the corresponding original size indicator lights.

Original size indicator Switch

A3/11" × 17" Eject switch (ESW)

A4/8

/2" × 11" Registration switch (RSW)

Completion

Press the stop/clear key. The indication for selecting a maintenance item No. appears.

U032 Checking clutch operation

Description

Turns each clutch on.

Purpose

To check the operation of each clutch.

Method

1. Press the start key. A selection item appears.

2. Select the clutch to be operated using the copy exposure adjustment keys.

3. Press the start key. The selected clutch turns on for 1 s.

Display Clutch

P1 Paper feed clutch (PFCL) Pb Bypass paper feed clutch (BYPPFCL) 2F Registration clutch (RCL)

Description

Completion

Press the stop/clear key. The indication for selecting a maintenance item No. appears.

1-4-7

2BV

Maintenance

item No. U033 Checking solenoid operation

Description

Turns the solenoid on.

Purpose

To check the operation of the solenoid.

Method

1. Press the start key. A selection item appears.

2. Select the desired operation using the copy exposure adjustment keys.

3. Press the start key. The selected operation starts.

Display Operation

A Turning the main switch off

Completion

Press the stop/clear key. The indication for selecting a maintenance item No. appears.

U034 Adjusting the print start timing

Adjustment

See pages 1-6-9 and 10.

U035 Setting folio size

Description

Changes the image area for copying onto folio size paper.

Purpose

To prevent the image at the trailing edge, or right or left side of the paper from not being copied by setting the actual size of the folio paper used.

Method

Press the start key.

Setting

1. Select the item by lighting a copy exposure indicator using the copy exposure adjustment keys.

2. Change the setting using the zoom +/– keys.

Copy exposure indicator Setting Setting range Initial setting

Exp. 1 Length 330 to 356 mm 330 Exp. 2 Width 200 to 220 mm 210

3. Press the start key. The value is set.

Completion

Press the stop/clear key. The indication for selecting a maintenance item No. appears.

U051 Adjusting the amount of slack in the paper

Adjustment

See page 1-6-12.

Description

1-4-8

2BV

Maintenance

item No.

U053 Performing fine adjustment of the motor speed

Description

Performs fine adjustment of the speeds of the motors.

Purpose

Used to adjust the speed of the respective motors when the magnification is not correct.

Method

Press the start key.

Setting

1. Select the item by lighting a copy exposure indicator using the copy exposure adjustment keys.

2. Change the setting using the zoom +/– keys.

Copy exposure indicator Description Setting range Initial setting

Exp. 1 Drive motor speed adjustment –5.0 to +5.0 0 Exp. 2 Polygon motor speed adjustment –5.0 to +5.0 0

Drive motor speed adjustment (unit: %) Increasing the setting makes the image longer in the auxiliary scanning direction, and decreasing it makes the image shorter in the auxiliary scanning direction. Polygon motor speed adjustment (unit: %) Increasing the setting makes the image longer in the main scanning direction and shorter in the auxiliary scanning direction; decreasing the setting makes the image shorter in the main scanning direction and longer in the auxiliary scanning direction.

3. Press the start key. The value is set.

Interrupt copy mode

While this maintenance item is being performed, a VTC pattern shown below is output in interrupt copy mode. Correct values for an A3/11" × 17" output are:

A = 300 ± 0.75 mm B = 260 ± 1.3 mm

Description

Figure 1-4-1

Adjustment

1. Output an A3/11" × 17" VTC pattern in interrupt mode.

2. Measure A and B on the VTC pattern (Figure 1-4-1), and perform the following adjustments if they are different from the correct sizes:

A: Drive motor speed adjustment B: Polygon motor speed adjustment

Completion

Press the stop/clear key at the screen for selecting an item. The indication f or selecting a maintenance item No . appears.

1-4-9

2BV

Maintenance

item No. U060 Adjusting the scanner input properties

Description

Adjusts the image scanning density.

Purpose

Used when the entire image appears too dark or light.

Method

Press the start key.

Setting

1. Change the setting using the zoom +/– keys.

Description Setting range Initial setting

Image scanning density 0 to 23 12

Increasing the setting makes the density lower, and decreasing it makes the density higher.

2. Press the start key. The value is set.

Interrupt copy mode

While this maintenance item is being performed, copying from an original can be made in interrupt copy mode.

Completion

Press the stop/clear key at the screen for selecting an item. The indication f or selecting a maintenance item No . appears.

Caution

The following settings are also reset to the initial values by performing this maintenance item:

• Exposure density gradient set in maintenance mode (U093)

• Exposure set in the copy default item of the copier management mode

U061 Turning the exposure lamp on

Description

Turns the exposure lamp on.

Purpose

To check the exposure lamp.

Method

1. Press the start key. “on” appears.

2. Press the start key. The exposure lamp lights.

3. To tur n the exposure lamp off, press the stop/clear key.

Completion

Press the stop/clear key. The indication for selecting a maintenance item No. appears.

U063 Adjusting the shading position

Description

Changes the shading position.

Purpose

Used when white lines continue to appear longitudinally on the image after the shading plate is cleaned. This is due to flaws or stains inside the shading plate. To pre vent this problem, the shading position should be changed so that shading is possible without being affected by the flaws or stains.

Method

1. Press the start key.

2. Change the setting using the zoom +/– keys.

Description Setting range Initial setting Change in value per step

Shading position –5 to +5 0 0.17 mm

Increasing the setting moves the shading position toward the machine right, and decreasing it moves the position toward the machine left.

3. Press the start key. The value is set.

Interrupt copy mode

While this maintenance item is being performed, copying from an original can be made in interrupt copy mode.

Completion

Press the stop/clear key at the screen for adjustment. The indication for selecting a maintenance item No. appears.

Description

1-4-10

2BV

Maintenance

item No.

U065 Adjusting the scanner magnification

Adjustment

See pages 1-6-26 and 27.

U066 Adjusting the leading edge registration for scanning an original on the contact glass

Adjustment

See page 1-6-28.

U067 Adjusting the center line for scanning an original on the contact glass

Adjustment

See page 1-6-29.

U073 Checking scanner operation

Description

Simulates the scanner operation under arbitrary conditions.

Purpose

To check scanner operation.

Method

1. Press the start key.

2. Select the item to be changed by lighting a copy exposure indicator using the copy exposure adjustment keys.

3. Change the setting using the zoom +/– keys.

Copy exposure indicator Operating conditions Setting range

Exp. 1 Magnification 50 to 200% Exp. 2 Paper size See below. Exp. 3 On and off of the exposure lamp on or off

Description

Paper size for each setting

Setting Paper size Setting Paper size

8 A4 40 A4R 9 B5 41 B5R 36 A3 42 A5R 39 B4 47 Folio

4. Press the start key. Scanning starts under the selected conditions.

5. To stop operation, press the stop/clear key.

Completion

Press the stop/clear key when scanning stops. The indication for selecting a maintenance item No. appears.

1-4-11

2BV

Maintenance

item No. U088 Setting the input filter (moiré reduction mode)

Description

Turns moiré reduction mode on and off by switching the input filter on and off.

Purpose

Used to prevent regular density unevenness (moiré) on halftone image areas of the copy image in text mode and text and photo mode. Such moiré is more likely to appear when an enlargement or reduction copy is made in text mode from an original containing large halftone image areas.

Method

Press the start key.

Setting

1. Select “on” or “oFF” using the zoom +/– keys. The selected item is displayed in reverse.

Display Description

on Moiré reduction mode oFF Normal copy mode

Initial setting: oFF If moiré on the copy image is significant, change the setting to “on”. Note that when the moiré reduction

mode is turned on, the resolution may be slightly reduced.

2. Press the start key. The value is set. The indication for selecting a maintenance item No. appears.

Completion

To exit this maintenance item without changing the current setting, press the stop/clear key. The indication for selecting a maintenance item No. appears.

U089 Outputting a MIP-PG pattern

Description

Selects and outputs a MIP-PG pattern created in the copier.

Purpose

When performing respective image printing adjustments, used to check the machine status apart from that of the scanner with a non-scanned output MIP-PG pattern.

Method

1. Press the start key.

2. Select the MIP-PG pattern to be output using the copy exposure adjustment keys.

Display Setting Setting range Initial setting

G-5 Gray scale - 180 Mono level 0 to 255 180 1-d 1-dot level - -

3. Press the size select key. The machine enters the PG pattern output mode.

4. Press the start key. A MIP-PG pattern is output.

Completion

Press the stop/reset key. The indication for selecting a maintenance item No. appears.

Description

1-4-12

2BV

Maintenance

item No.

U091 Checking shading

Description

Performs scanning under the same conditions as before and after shading is performed, displaying the original scanning values at nine points of the contact glass.

Purpose

To check the change in original scanning values before and after shading. The results may be used to decide the causes for fixing unevenness (uneven density) of the gray area of an image: either due to optical (shading or CCD) or other problems. Also to check the causes for a white or black line appearing longitudinally.

Method

1. Press the start key. A selection item appears.

2. Select the item to be operated using the zoom +/– keys.

Display Output list

on Performs scanning before shading and displays the result. oFF Performs scanning after shading and displays the result.

3. Press the start key. Scanning is performed under the selected conditions and the result is displayed.

4. Change the measurement point by lighting a copy exposure indicator or making one flash using the copy exposure adjustment keys. For the correspondence between the measurement points and the copy exposure indicators, see Figure 1-4-2.

Description

20 mm from the machine left 200 mm from the machine left 400 mm from the machine left

123 456 789

100 mm from the machine

center toward machine front

Machine center

100 mm from machine

center toward machine rear

Point Copy exposure indicator

1 Exp. 1 lights. 2 Exp. 2 lights. 3 Exp. 3 lights. 4 Exp. 4 lights. 5 Exp. 5 lights. 6 Exp. 1 flashes. 7 Exp. 2 flashes. 8 Exp. 3 flashes. 9 Exp. 4 flashes.

Figure 1-4-2

1-4-13

2BV

Maintenance

item No. U091

(cont.)

U092 Adjusting the scanner automatically

When scanning is performed before shading, the scan value at the machine center should be slightly different from those at the machine front and rear. When scanning is perf ormed after shading, there should be no difference between respective v alues. Any diff erences between the v alues at machine front and rear indicates that scanner problem causes the fixing unevenness. If the displayed results indicate no shading problems, the fixing unevenness (uneven copy density) is caused by factors other than in the scanner section (shading or CCD). If a black line appears, the cause may be assumed based on the results of the scanning operation before shading: if a white line appears, they may be assumed based on the results of the scanning operation after shading. Note that depending on the thickness and location of the black or white line, it may not be possible to use this method to determine the cause. This is because the displa yed v alues obtained from scanning at the limit of nine points are insufficient to provide significant information.

5. Press the stop/clear key. The selected item appears.

Completion

Press the stop/clear key while a selection item is displayed. The indication for selecting a maintenance item No. appears.

Description

Makes auto scanner adjustments in the order below using the specified original.

• Adjusting the scanner center line (U067)

• Adjusting the scanner leading edge registration (U066)

• Adjusting scanner magnification in the auxiliary direction (U065)

When this maintenance item is performed, the settings in U065, U066 and U067 are also changed.

Purpose

Used to make respective auto adjustments for the scanner.

Method

1. Place the specified original (P/N: 2AC68240) on the contact glass.

2. Press the start key. “on” appears.

3. Press the start key. Auto adjustment starts. When adjustment is complete, “Gd” appears.

4. Display each setting value after adjustment by lighting a copy exposure indicator using the copy exposure adjustment keys.

Copy exposure indicator Setting value

Exp. 2 Scanner center line Exp. 3 Scanner leading edge registration Exp. 4 Scanner magnification in the auxiliary scanning direction

If a problem occurs during auto adjustment, “nG” is displayed and operation stops. Lighting the copy exposure indicator exp. 2 and then exp. 3 using the copy exposure adjustment keys will display the error code. Determine the details of the problem and either repeat the procedure from the beginning, or adjust the remaining items manually by running the corresponding maintenance items.

Completion

Press the stop/clear key after auto adjustment is complete. The indication f or selecting a maintenance item No . appears. If the stop/clear key is pressed during auto adjustment, adjustment stops and no settings are changed.

Description

1-4-14

2BV

Maintenance

item No.

U093 Setting the exposure density gradient

Description

Changes the exposure density gradient in manual density mode, depending on respective image modes (text, text and photo, photo).

Purpose

T o set ho w the image density is altered by a change of one step in the manual density adjustment. Also used to make copy image darker or lighter.

Start

1. Press the start key. A selection item appears.

2. Select the image mode to be adjusted by lighting image mode LEDs using the image mode selection key.

3. Press the start key. The machine enters the setting mode.

Image mode LEDs Description

Auto Exposure

Text & Photo

Photo

Text

Auto Exposure

Text & Photo

Photo

Text

Auto Exposure

Text & Photo

Photo

Text

Density in text mode

Density in text and photo mode

Density in photo mode

: Off, : On

Description

1-4-15

2BV

Maintenance

item No. U093

(cont.)

Setting

1. Select the item to be adjusted by lighting a copy exposure indicator using the copy exposure adjustment

Description

keys.

2. Adjust the setting using the zoom +/– keys.

Copy exposure indicator

Description Setting range Initial setting

Exp. 1 Change in density when manual density is set dark 0 to 3 0 Exp. 2 Change in density when manual density is set light 0 to 3 0

Increasing the setting makes the change in density larger, and decreasing it makes the change smaller.

Image density

Dark

Light

Density adjustment range: Special area

Set to DARKERSet to LIGHTER

Center

Density adjustment range: Normal

Setting: 0Setting: 3

Density adjustment

Dark

Figure 1-4-3 Exposure density gradient

3. Press the start key. The value is set.

4. Press the stop/clear key. The selected item appears.

Interrupt copy mode

While this maintenance item is being performed, copying from an original can be made in interrupt copy mode.

Completion

Press the stop/clear key while a selection item is display ed. The indication for selecting a maintenance item No . appears.

1-4-16

2BV

Maintenance

item No.

U100 Setting the surface potential

Description

Changes the surface potential by changing the grid control voltage. Also performs main charging.

Purpose

To set the surface potential or check main charging. Also used when reentering data after initializing the set data.

Start

1. Press the start key. A selection item appears.

2. Select the item using the copy exposure adjustment keys.

Display (copy exposure indicator) Description

——— (exp. 1) Changing the grid control voltage on1 (exp. 2) Turning the main charger on on2 (exp. 3) Turning the main charger on and the laser scanner unit

Method for main charger output

1. Press the start key. The selected operation starts.

2. To stop operation, press the stop/clear key.

Setting the grid control voltage

1. Change the setting using the zoom +/– keys.

Description Setting range Initial setting

Grid control voltage 0 to 255 184

Increasing the setting makes the surface potential higher, and decreasing it makes the potential lower. Change in value per step: approximately 3.6 V

2. Press the start key. The value is set.

Interrupt copy mode

While this maintenance item is being performed, copying from an original can be made in interrupt copy mode.

Completion

Press the stop/clear key when main charger output stops while a selection item is displayed. The indication for selecting a maintenance item No. appears.

Description

on and off

1-4-17

2BV

Maintenance

item No. U101 Setting high voltages

Description

Changes the developing bias voltage and transfer voltage by changing the developing bias control voltage and transfer control voltage. Also checks the transfer output voltage.

Purpose

To check and change high voltages other than the main charger voltage.

Start

1. Press the start key. A selection item appears.

2. Select the item to be set or checked by lighting image mode LEDs using the image mode selection key.

Image mode LEDs Description

: Off, : On

Setting the developing bias

1. Select the item to be adjusted by lighting a copy exposure indicator using the copy exposure adjustment keys.

2. Change the setting using the zoom +/– keys.

Copy exposure indicator Description Setting range Initial setting

Exp. 1 Developing bias control voltage 25 to 255 193 Exp. 2 Developing bias control voltage 25 to 255 38

Increasing the setting makes the developing bias higher and the image darker; decreasing it makes the bias lower and the image lighter.

3.Press the start key. The value is set.

Setting the transfer voltage

1. Select the item to be adjusted by lighting a copy exposure indicator using the copy exposure adjustment keys.

2. Change the setting using the zoom +/– keys.

Copy exposure indicator Description Setting range Initial setting

Exp. 1 Transfer control voltage 0 to 255 115 Exp. 2 Transfer voltage output timing –250 to +250 –176

Increasing the exp. 1 setting makes the transf er v oltage higher , and decreasing it mak es the v oltage low er . Increasing the exp. 2 setting makes the transfer voltage output timing later and improves paper separation performance.

3. Press the start key. The value is set.

4. To check the transfer voltage output, light the copy exposure indicator exp. 3 using the copy exposure adjustment keys and press the start key. The currently set transfer voltage is output.

5. To stop the transfer voltage output, press the stop/clear key.

Interrupt copy mode

While this maintenance item is being performed, copying from an original can be made in interrupt copy mode.

Completion

Press the stop/clear key while a selection item is displayed. The indication for selecting a maintenance item No. appears.

Auto Exposure

Text & Photo

Photo

Text

Auto Exposure

Text & Photo

Photo

Text

Description

Setting the developing bias

Setting and checking the transfer voltage

during image formation during no image formation

1-4-18

2BV

Maintenance

item No.

U109 Setting the drum type

Description

Sets the type of the drum installed in the copier.

Purpose

To prevent variations in halftone due to differences in drum sensitivity.

Method

Press the start key.

Setting

1. Select the drum type using the zoom +/– keys.

Display Description

G Type G H Type H J Type J

Initial setting: H

2. Press the start key. The setting is set. The indication for selecting a maintenance item No. appears.

Completion

To exit this maintenance item without changing the current setting, press the stop/clear key. The indication for selecting a maintenance item No. appears.

U110 Checking/clearing the drum count

Description

Displays the drum counts for checking, clearing or changing the figure, which is used as a reference when correcting the main charger potential output.

Purpose

To check the drum status. Also used to clear the count after replacing the drum during regular maintenance. Since the count was cleared before shipping, do not clear it when installing.

Method

1. Press the start key.

2. Select the item by lighting a copy exposure indicator using the copy exposure adjustment keys.

Copy exposure indicator Description Setting range Initial setting

Exp. 1 First 3 digits 000 to 999 000 Exp. 2 Last 3 digits 000 to 999 000 Exp. 3 Clearing the count ——— ———

Description

Clearing

1. Light exp. 3.

2. Press the start key. The count is cleared, and the indication for selecting a maintenance item No. appears.

Setting

1. Change the count using the numeric or zoom +/– keys.

2. Press the start key. The count is set, and the indication for selecting a maintenance item No. appears.

Completion

T o e xit the maintenance mode without changing the count, press the stop/clear ke y. The indication f or selecting a maintenance item No. appears.

1-4-19

2BV

Maintenance

item No. U111 Checking/clearing the drum drive time

Description

Displays the drum drive time for checking, clearing or changing a figure, which is used as a reference when correcting the high voltage based on time.

Purpose

To check the drum status. Also used to clear the drive time after replacing the drum.

Method

1. Press the start key.

2. Select the item by lighting a copy exposure indicator using the copy exposure adjustment keys.

Copy exposure indicator Description Setting range Initial setting

Exp. 1 First 2 digits 00 to 59 (min) 00 Exp. 2 Last 3 digits 000 to 999 (min) 000 Exp. 3 Clearing the drive time ——— ———

Clearing

1. Light exp. 3.

2. Press the start key. The time is cleared, and the indication for selecting a maintenance item No. appears.

Setting

1. Change the drive time (in minutes) using the numeric or zoom +/– keys.

2. Press the start key. The time is set, and the indication for selecting a maintenance No. appears.

Completion

To exit this maintenance item without changing the time, press the stop/clear k ey. The indication f or selecting a maintenance item No. appears.

U130 Initial setting for the developer

Description

Automatically sets the toner sensor control voltage and toner feed start level for the installed developer.

Purpose

To set the initial settings for the developer when installing the machine or replacing the developer.

Method

1. Press the start key.

2. Press the start key. The initial settings for the developer is set, and the result is displayed.

3. Display the setting value for each item by lighting the respective copy exposure indicator using the copy exposure adjustment keys.

Copy exposure indicator Description

Exp. 1 Toner sensor output value Exp. 2 Toner sensor control voltage Exp. 3 Toner feed start level Exp. 4 Absolute humidity

Description

1-4-20

Supplement

The following data is also renewed or cleared by performing this maintenance item:

• Renewing the toner sensor control voltage (U131)

• Renewing the toner feed start level (U156)

• Clearing the developing drive time (U157)

• Clearing the developing count (U158)

• Resetting the toner feed start level and toner empty detection

Completion

After initial setting is complete, press the stop/clear key. The indication for selecting a maintenance item No. appears.

2BV

Maintenance

item No.

U131 Setting the toner sensor control voltage

Description

Displays or changes the toner sensor control voltage automatically set in maintenance item U130.

Purpose

To check the automatically set toner sensor control voltage . Also to change the toner density if an image is too dark or light.

Method

Press the start key. The current setting for the toner sensor control voltage is displayed.

Setting

1. Change the setting using the zoom +/– keys.

Description Setting range Initial setting

Toner sensor control voltage 0 to 255 155

Increasing the setting makes the density higher, and decreasing it makes the density lower. Increasing the setting too high may result in toner scattering.

2. Press the start key. The value is set.

Completion

Press the stop/clear key. The indication for selecting a maintenance item No. appears.

U132 Replenishing toner forcibly

Description

Replenishes toner forcibly until the toner sensor output value reaches the toner feed start level.

Purpose

Used when the toner empty is detected frequently.

Method

1. Press the start key.

2. Press the start key. Operation starts, and the current data is displayed. Toner is replenished until the toner sensor output value reaches the toner feed start level.

3. Display each data by lighting the respective copy exposure indicator using the copy exposure adjustment keys.

Copy exposure indicator Description

Exp. 1 Toner sensor output value after start key is pressed Exp. 2 Current toner feed start level Exp. 3 Current toner sensor control voltage Exp. 4 Absolute humidity

4. To stop operation, press the stop/clear key.

Completion

Press the stop/clear key when toner replenishment stops. The indication for selecting a maintenance item No. appears.

U135 Checking toner feed motor operation

Description

Drives the toner feed motor.

Purpose

To check the operation of the toner feed motor.

Caution

Note that driving the motor unnecessarily long may cause a toner jam, resulting in machine lockup. Be sure to drive the motor for only a few seconds.

Method

1. Press the start key. “on” appears.

2. Press the start key. The toner feed motor turns on.

3. To stop operation, press the stop/clear key.

Completion

Press the stop/clear key when operation stops. The indication for selecting a maintenance item No. appears.

Description

1-4-21

2BV

Maintenance

item No. U155 Displaying the toner sensor output

Description

Displays the toner sensor output value, and related data.

Purpose

To check the toner sensor output value.

Method

1. Press the start key.

2. Press the start key. Sampling starts.

3. Display each data by lighting the respective copy exposure indicator using the copy exposure adjustment keys.

Copy exposure indicator Description

Exp. 1 Toner sensor output value after start key is pressed Exp. 2 Current toner feed level (value corrected based on humidity

Exp. 3 Current toner sensor control voltage Exp. 4 Absolute humidity

4. Press the stop/clear key. The sampling operation stops.

Completion

Press the stop/clear key. The indication for selecting a maintenance item No. appears.

U156 Changing the toner control level

Description

Changes the toner feed start level set in maintenance item U130 or the toner empty level to be determined by the difference from the toner feed start level.

Purpose

To check the toner feed start level and toner empty level.

Method

1. Press the start key.

2. Select the item by lighting a copy exposure indicator using the copy exposure adjustment keys.

Copy exposure indicator Description

Exp. 1 Toner feed start level Exp. 2 Difference between the toner feed start level and toner empty

Description

and drive time)

level

1-4-22

Setting for the toner feed start level

1. Change the setting using the zoom +/– keys.

Description Setting range

Toner feed start level 0 to 255

Increasing the setting makes the toner density lower.

2. Press the start key. The value is set.

Setting for the toner empty level

1. Change the setting using the zoom +/– keys.

Description Setting range

Difference between the toner feed start level and the toner empty level 0 to 255

Increasing the setting makes the toner empty level higher: the toner density is lower when the toner empty is detected.

2. Press the start key. The value is set.

Completion

Press the stop/clear key. The indication for selecting a maintenance item No. appears.

2BV

Maintenance

item No.

U157 Checking/clearing the developing drive time

Description

Displays the developing drive time for checking, clearing or changing a figure, which is used as a reference when correcting the toner control. It is automatically cleared when U130 is executed.

Purpose

To check the developing drive time after replacing the developer.

Method

1. Press the start key.

2. Select the item by lighting a copy exposure indicator using the copy exposure adjustment keys.

Copy exposure indicator Description Setting range Initial setting

Exp. 1 First 2 digits 00 to 59 (min) 00 Exp. 2 Last 3 digits 000 to 999 (min) 000 Exp. 3 Clearing the drive time ——— ———

Clearing

1. Light exp. 3.

2. Press the start key. The time is cleared, and the indication for selecting a maintenance item No. appears.

Setting

1. Change the drive time (in minutes) using the numeric or zoom +/– keys.

2. Press the start key. The time is set, and the indication for selecting a maintenance item No. appears.

Completion

To exit this maintenance item without changing the time, press the stop/clear k ey. The indication for selecting a maintenance item No. appears.

U158 Checking/clearing the developing count

Description

Displays the developing count for checking, clearing or changing a figure, which is used as a reference when correcting the toner control. It is automatically cleared when U130 is executed.

Purpose

To check the developing count after replacing the developer.

Method

1. Press the start key.

2. Select the item by lighting a copy exposure indicator using the copy exposure adjustment keys.

Copy exposure indicator Description Setting range Initial setting

Exp. 1 First 3 digits 000 to 999 000 Exp. 2 Last 3 digits 000 to 999 000 Exp. 3 Clearing the count ——— ———

Description

Clearing

1. Light exp. 3.

2. Press the start key. The count is cleared, and the indication for selecting a maintenance item No. appears.

Setting

1. Change the count using the numeric or zoom +/– keys.

2. Press the start key. The count is cleared, and the indication for selecting a maintenance item No. appears.

Completion

To exit this maintenance item without changing the count, press the stop/clear ke y. The indication for selecting a maintenance item No. appears.

1-4-23

2BV

Maintenance

item No. U161 Setting the fixing control temperature

Description

Changes the fixing control temperature.

Purpose

Normally no change is necessary. However, can be used to prevent curling or creasing of paper, or solve a fixing problem on thick paper.

Method

Press the start key. The screen for selecting an item is displayed.

Setting

1. Select the item to be set by lighting a copy exposure indicator using the copy exposure adjustment keys.

2. Change the setting using the zoom +/– keys.

Copy exposure indicator

Exp. 1 Primary stabilization fixing temperature 115 to 145 (°C) 135 Exp. 2 Secondary stabilization fixing temperature 135 to 190 (°C) 160 Exp. 3 Regular stabilization control temperature 145 to 220 (°C) 180 Exp. 4 Temperature to be deducted from the 0 to 50 (°C) 0

The temperatures are to be set such that exp. 2 ≥ exp. 1.

3. Press the start key. The value is set.

Completion

Press the stop/clear key. The indication for selecting a maintenance item No. appears.

U162 Stabilizing fixing forcibly

Description

Stops the stabilization fixing drive forcibly, regardless of fixing temperature.

Purpose

To forcibly stabilize the machine before the fixing section reaches stabilization temperature.

Method

1. Press the start key. “on” appears.

2. Press the start key. The forced stabilization mode is entered, and stabilization operation stops regardless of fixing temperature. The indication for selecting a maintenance item No. appears. To exit the forced stabilization mode, turn the power off and on.

Completion

To exit this maintenance item without executing forced fixing stabilization, press the stop/clear key. The indication for selecting a maintenance item No. appears.

U163 Resetting the fixing problem data

Description

Resets the detection of a service call code indicating a problem in the fixing section.

Purpose

To prevent accidents due to an abnormally high fixing temperature.

Method

1. Press the start key. “CLE” appears.

2. Press the start key. The fixing problem data is initialized.

Completion

Press the stop/clear key. The indication for selecting a maintenance item No. appears.

Description Setting range Initial setting

regular control temperature when copying onto small-sized paper.

Description

1-4-24

2BV

Maintenance

item No.

U196 Turning the fixing heater on

Description

Turns the fixing heater on.

Purpose

To check fixing heater.

Method

1. Press the start key. “on” appears.

2. Press the start key. The fixing heater turns on for 1 s and then turns off.

Completion

Press the stop/clear key when fixing heater is off. The indication for selecting a maintenance item No. appears.

U199 Checking the fixing temperature

Description

Displays the fixing temperature and the ambient temperature.

Purpose

To check the fixing temperature and the ambient temperature.

Method

1. Press the start key.

2. Display each temperature by lighting the respective copy exposure indicator using the copy exposure adjustment keys.

Copy exposure indicator Description

Exp. 1 Fixing temperature (°C) Exp. 2 Ambient temperature (°C)

Description

Completion

Press the stop/clear key. The indication for selecting a maintenance item No. appears.

U200 Turning all LEDs on

Description

Turns all the LEDs on the operation panel on.

Purpose

To check if all the LEDs on the operation panel light.

Method

Press the start key. All the LEDs on the operation panel light. Press the stop/clear key or wait for 10 s. The LEDs turns off, and the indication for selecting a maintenance item No. appears.

1-4-25

2BV

Maintenance

item No. U204 Setting the presence or absence of a total counter

Description

Sets the presence or absence of the optional total counter.

Purpose

Perform after installing the total counter.

Method

Press the start key.

Setting

1. Select the installation status of the total counter using the zoom +/- keys.

Display Description

oFF None on The total counter is installed

2. Press the start key. The setting is set and the indication for selecting a maintenance item No. appears.

Completion

To exit this maintenance item without changing the current setting, press the stop/clear key. The indication for selecting a maintenance item No. appears.

U207 Checking the operation panel keys

Description

Checks operation of the operation panel keys.

Purpose

To check operation of all the keys and LEDs on the operation panel.

Method

1. Press the start key.

2. “1” appears on the copy quantity display and the leftmost LED on the operation panel lights.

3. As the keys lined up in the same line as the lit indicator are pressed in the order from the top to the bottom, the figure shown on the copy quantity display increases in increments of 1. When all the keys in that line are pressed and if there are any LEDs corresponding to the keys in the line on the immediate right, the top LED in that line will light.

4. When all the keys on the operation panel have been pressed, all the LEDs light for up to 10 seconds.

5. When the LEDs go off, press the start key. All the LEDs light for 10 seconds again.

Completion

Press the stop/clear key. The indication for selecting a maintenance item No. appears.

• After checking numeric key 1, the operation cannot be canceled until all the keys are checked.

Description

1-4-26

2BV

Maintenance

item No.

U250 Setting the maintenance cycle

Description

Displays and changes the maintenance cycle.

Purpose

To check and change the maintenance cycle.

Method

Press the start key. The current setting is displayed as follows: Maintenance cycle (number of copies) = setting × 1000

Setting

1. Change the setting using the zoom +/– keys.

Description Setting range Initial setting Change in value per step

Maintenance cycle 0 to 600 100 1000 (copies)

For example, when set to 120, the maintenance cycle is set to 120000.

2. Press the start key. The value is set, and the indication for selecting a maintenance item No. appears.

Completion

To exit this maintenance item without changing the current setting, press the stop/clear key. The indication for selecting a maintenance item No. appears.

Description

1-4-27

2BV

Maintenance

item No. U251 Checking/clearing the maintenance count

Description

Displays, clears and changes the maintenance count.

Purpose

To check the maintenance count. Also to clear the count during maintenance service.

Method

1. Press the start key.

2. Select the item by lighting a copy exposure indicator using the copy exposure adjustment keys.

Copy exposure indicator Description Setting range Initial setting

Exp. 1 First 3 digits 000 to 999 000 Exp. 2 Last 3 digits 000 to 999 000 Exp. 3 Clearing the count ——— ———

Clearing

1. Light exp. 3.

2. Press the start key. The count is cleared, and the indication for selecting a maintenance item No. appears.

Setting

1. Change the count using the numeric or zoom +/– keys.

2. Press the start key. The count is set, and the indication for selecting a maintenance item No. appears.

Completion

To exit this maintenance item without changing the count, press the stop/clear k ey. The indication for selecting a maintenance item No. appears.

U252 Setting the destination

Description

Switches the operations and screens of the machine according to the destination.

Purpose

To be executed after replacing the backup RAM on the main PCB or initializing the backup RAM by running maintenance item U020, in order to return the setting to the value before replacement or initialization.

Method

Press the start key.

Setting

1. Select the destination using the zoom +/– keys.

Display Description

JPn Metric (Japan) specifications Inc Inch (North America) specifications EUP Metric (Europe) specifications ASA Metric (Asia Pacific) specifications

2. Press the start key. The setting is set, and the machine automatically returns to the same status as when the power is turned on.

Completion

To exit this maintenance item without changing the current count, press the stop/clear key. The indication for selecting a maintenance item No. appears.

Supplement

The specified initial settings are provided according to the destinations in the maintenance items below. To change the initial settings in those items, be sure to run maintenance item U021 after changing the destination.

Description

1-4-28

2BV

Maintenance

item No.

U253 Switching between double and single counts

Description

Switches the count system for the total counter and other counters.

Purpose

According to user (copy service provider) request, select if A3/11" × 17" paper is to be counted as one sheet (single count) or two sheets (double count).

Method

Press the start key.

Setting

1. Select double or single count using the zoom +/– keys.

Display Description

d-C Double count for A3/11" × 17" paper only S-C Single count for all size paper

Initial setting: Double count

2. Press the start key. The setting is set, and the indication for selecting a maintenance item No. appears.

Completion

To exit this maintenance item without changing the current setting, press the stop/clear key. The indication for selecting a maintenance item No. appears.

U254 Turning auto start function on/off

Description

Selects if the auto start function is turned on.

Purpose

Normally no change is necessary. If incorrect operation occurs, turn the function off: this may solve the problem.

Method

Press the start key.

Setting

1. Select either “on” or “oFF” using the zoom +/– keys.

Display Description

on Auto start function on oFF Auto start function off

Initial setting: on

2. Press the start key. The setting is set, and the indication for selecting a maintenance item No. appears.

Completion

To exit this maintenance item without changing the current setting, press the stop/clear key. The indication for selecting a maintenance item No. appears.

Description

1-4-29

2BV

Maintenance

item No. U255 Setting auto clear time

Description

Sets the time to return to initial settings after copying is complete.

Purpose

To be set according to frequency of use. Set to a comparatively long time for continuous copying at the same settings, and a comparatively short time for frequent copying at various settings.

Method

Press the start key. The current setting is displayed.

Setting

1. Change the setting using the zoom +/– keys.

Description Setting range Initial setting

Auto clear time 0 to 270 90

The setting can be changed by 30 s per step. When set to 0, the auto clear function is cancelled.

2. Press the start key. The value is set, and the indication for selecting a maintenance item No. appears.

Completion

To exit this maintenance item without changing the current setting, press the stop/clear key. The indication for selecting a maintenance item No. appears.

U256 Turning auto preheat/energy saver function on/off

Description

Selects if the auto preheat/energy saver function is turned on. When set to ON, the time to enter preheat/ energy saver mode can be changed in copy management mode.

Purpose

According to user request, to set the preheat time to save energy, or enable copying promptly without the recovery time from preheat mode.

Method

Press the start key.

Setting

1. Select “on” or “oFF” using the zoom +/– keys.

Display Description

on Auto preheat/energy saver function on oFF Auto preheat/energy saver function off

Initial setting: on

2. Press the start key. The setting is set, and the indication for selecting a maintenance item No. appears. When the setting is changed from “oFF” to “on”, the auto preheat time is set to the initial setting of 15 minutes.

Completion

To exit this maintenance item without changing the current setting, press the stop/clear key. The indication for selecting a maintenance item No. appears.

Description

1-4-30

2BV

Maintenance

item No.

Description

U258 Switching copy operation at toner empty detection

Description

Selects if continuous copying is enabled after toner empty is detected, and sets the number of copies that can be made after the detection.

Method

Press the start key. The current setting is displayed.

Start

1. Press the start key. A selection item appears.

2. Select the item by lighting image mode LEDs using the image mode selection key.

Image mode LEDs Description

Auto Exposure

Text & Photo

Photo

Text

Auto Exposure

Text & Photo

Photo

Text

Switching copy operation at toner empty detection between single or continuous copying

Setting the number of copies after toner empty detection

: Off, : On

Setting copy operation at toner empty detection between single and continuous copying

1. Select single or continuous copying using the zoom +/– keys.

Display Description

Sin Enables only single copying. Con Enables single and continuous copying.

Initial setting: Sin

2. Press the start key. The setting is set.

Setting the number of copies after toner empty detection

1. Set the number of copies that can be made using the zoom +/– keys.

Description Setting range Initial setting

Number of copies after toner empty detection 0 to 200 (copies) 70

The setting can be changed by 5 copies per step. When set to 0, the number of copies is not limited regardless of the setting for single or continuous copying.

2. Press the start key.

Completion

Press the stop/clear key while a selection item is displayed. The indication for selecting a maintenance item No. appears.

1-4-31

2BV

Maintenance

item No. U260 Changing the copy count timing

Description

Changes the copy count timing for the total counter and other counters.

Purpose

To be set according to user (copy service provider) request. If a paper jam occurs frequently in the eject section when the number of copies is counted at the time of paper ejection, copies are provided without copy counts. The copy service provider cannot charge for such copying. To prevent this, the copy timing should be made earlier. If a paper jam occurs frequently in the paper conveying or fixing sections when the number of copies is counted before the paper reaches those sections, copying is charged without a copy being made. To prevent this, the copy timing should be made later.

Method

Press the start key.

Setting

1. Select the copy count timing using the zoom +/– keys.

Display Description

FEd When secondary paper feed starts EJE When the paper is ejected

Initial setting: EJE

2. Press the start key. The setting is set, and the indication for selecting a maintenance item No. appears.

Completion

To exit this maintenance item without changing the current setting, press the stop/clear key. The indication for selecting a maintenance item No. appears.

Description

1-4-32

2BV

Maintenance

item No.

Description

U332 Setting the size conversion factor

Description

Sets the factor for converting each paper size into A4/11" × 81/2". The black ratio is converted for the A4/

11" × 8

/2" size using the factor set in this maintenance item. Values set are displayed in the user simulation.

Purpose

To set the factor to convert the black ratio of each paper size for A4/11" × 8

/2" size.

Method

1. Press the start key.

2. Select the paper size to be set by lighting a copy exposure indicator or making one flash using the copy exposure adjustment keys.

Metric specifications

Image mode LEDs

Copy exposure indicator setting

Paper size Setting range

Setting for the copier mode Exp. 1 (lit) A3 0.0 to 3.0 2.0

Exp. 2 (lit) B4 0.0 to 3.0 1.5 Exp. 3 (lit) A4 0.0 to 3.0 1.0 Exp. 4 (lit) B5 0.0 to 3.0 0.7 Exp. 5 (lit) A5 0.0 to 3.0 0.5 Exp. 1 (flashing) B6 0.0 to 3.0 0.5 Exp. 2 (flashing) A6 0.0 to 3.0 0.5 Exp. 3 (flashing) Postcard 0.0 to 3.0 0.5 Exp. 4 (flashing) Folio 0.0 to 3.0 1.5 Exp. 5 (flashing) Non-standard 0.0 to 3.0 1.0

: Off, : On

Inch specifications

Image mode LEDs

Copy exposure indicator setting

Paper size Setting range

Setting for the copier mode Exp. 1 (lit) 11" × 17" 0.0 to 3.0 2.0

Auto Exposure

Text & Photo

Photo

Text

Exp. 2 (lit) 8 Exp. 3 (lit) 8 Exp. 4 (lit) 5 Exp. 5 (lit) Non-standard 0.0 to 3.0 1.0

/2" × 14" 0.0 to 3.0 1.5

/2" × 11" 0.0 to 3.0 1.0

/2" × 81/2" 0.0 to 3.0 0.5

: Off, : On

Initial

4. Change the setting using the zoom +/– keys.

5. Press the start key. The value is set.

Completion

To exit this maintenance item without changing the current setting, press the stop/clear key. The indication for selecting a maintenance item No. appears.

1-4-33

2BV

Maintenance

item No. U344 Setting preheat/energy saver mode

Description

Changes the control for preheat/energy saver mode.

Purpose

According to user request, selects which has priority, the recovery time from preheat or energy saver.

Method

Press the start key.

Setting

1. Select control mode using the zoom +/– keys.

Display Control in preheat mode

InS (instant ready) Without decreasing the fixing control temperature, the display

on the operation panel is turned off.

ESr (energy star) The fixing control temperature is set at 70°C/158°F. The

copier is forcibly stabilized 30 s after exiting preheat/energy saver mode.

Prh (priority to recovery time) The fixing control temperature is set at 130°C/266°F.

Initial setting: Energy star

2. Press the start key. The setting is set, and the indication for selecting a maintenance item No. appears.

Completion

To exit this maintenance item without changing the current setting, press the stop/clear key. The indication for selecting a maintenance item No. appears.

U345 Setting the value for maintenance due indication

Description

Sets when to indicate that the time for maintenance is about to be reached, by setting the number of copies that can be made before the current maintenance cycle ends. When the difference between the number of copies of the maintenance cycle and that of the maintenance count reaches the set value, the maintenance indicator flashes.

Purpose

To change the time to display the maintenance due indication.

Method

Press the start key. The current setting is displayed.

Setting

1. Select the item by lighting a copy exposure indicator using the copy exposure adjustment keys.

Copy exposure indicator Description Setting range Initial setting

Exp. 1 First digit 0 to 9 0 Exp. 2 Last 3 digits 000 to 999 000

2. Change the setting value using the numeric or zoom +/– keys.

3. Press the start key. The setting is set, and the indication for selecting a maintenance item No. appears.

Completion

To exit this maintenance item without changing the current setting, press the stop/clear key. The indication for selecting a maintenance item No. appears.

Description

1-4-34

2BV

Maintenance

item No.

U348 Setting the copy density adjustment range

Description

Selects the adjustment range for copy density from NORMAL and SPECIAL AREA (for wider range).

Purpose

To change the setting according to user request. When especially dark or light density is requested, set to SPECIAL AREA.

Method

Press the start key.

Setting

1. Select the density range using the zoom +/– keys.

Display Description

SPC (special area) 11/15 steps (enlargement mode) nrL (normal) 5/9 steps

Initial setting: Normal

2. Press the start key. The setting is set, and the indication for selecting a maintenance item No. appears.

Completion

To exit this maintenance item without changing the current setting, press the stop/clear key. The indication for selecting a maintenance item No. appears.

U402 Adjusting margins of image printing

Adjustment

See page 1-6-11.

U403 Adjusting margins for scanning an original on the contact glass

Adjustment

See page 1-6-30.

Description

1-4-35

2BV

Maintenance

item No.

Description

U901 Checking/clearing copy counts by paper feed locations

Description

Displays or clears copy counts by paper feed locations.

Purpose

To check the time to replace consumable parts. Also to clear the counts after replacing the consumable parts.

Method

1. Press the start key.

2. Select the paper feed location (group No.) for which the count is to be checked or cleared by lighting image mode LEDs using the image mode selection key.

3. Change the indication of the copy quantity display by lighting a copy exposure indicator using the copy exposure adjustment keys.

Image mode LED (group No.)

Auto Exposure

Text & Photo

Photo

Text

Auto Exposure

Text & Photo

Photo

Text

Auto Exposure

Text & Photo

Photo

Text

Copy exposure indicator

Exp. 1 First 3 digits of bypass copy count Exp. 2 Last 3 digits of bypass copy count Exp. 3 Clearing the count (CLE)

Exp. 1 First 3 digits of drawer copy count Exp. 2 Last 3 digits of drawer copy count Exp. 3 Clearing the count (CLE)

Exp. 1 Clearing all counts (CLE)

: Off, : On

Clearing copy counts by paper feed locations

1. Select the paper feed location to clear the count.

2. Light exp. 3 using the copy exposure adjustment key.

3. Press the start key. The count is cleared.

Clearing copy counts for all paper feed locations

1. Select group 3.

2. Press the start key. The counts are cleared.

Completion

Press the stop/clear key. The indication for selecting a maintenance item No. appears.

Copy quantity display (count value)

1-4-36

2BV

Maintenance

item No.

U903 Checking/clearing the paper jam counts

Description

Displays or clears the jam counts by jam locations.

Purpose

To check the paper jam status. Also to clear the jam counts after replacing consumable parts.

Method

1. Press the start key.

2. Display the jam code to check the count using the copy exposure adjustment keys.

3. Press the start key. The jam count appears. If the jam count is a 4-digit value, the first digit and the last 3 digits are displayed alternately.

4. Press the stop/clear key. The jam code appears again.

Copy exposure

J10

Stop/ clear key

adjustment keys

Start key

Copy exposure adjustment keys

Clearing all jam counts

1. Display “CLE” using the copy exposure adjustment keys. Jam counts cannot be cleared individually.

2. Press the start key. The counts are cleared.

Completion

Press the stop/clear key. The indication for selecting a maintenance item No. appears.

U904 Checking/clearing the service call counts

Description

Displays or clears the service call code counts by types.

Purpose

To check the service call code status by types. Also to clear the service call code counts after replacing consumable parts.

Method

1. Press the start key.

2. Display the service call code to check the count using the copy exposure adjustment keys.

3. Press the start key. The service call count appears. If the service call count is a 4-digit value, the first digit and the last 3 digits are displayed alternately.

4. Press the stop/clear key. The service call code appears again.

Description

J20

Stop/ clear key

100

Figure 1-4-4

Copy exposure adjustment keys

Start key

CLE

Stop/ clear key

011

Copy exposure adjustment keys

Start key

Copy exposure adjustment keys

100

Stop/ clear key

100

Copy exposure adjustment keys

Start key

Figure 1-4-5

Clearing counts by service call codes

1. Display the service call code to clear the count.

2. Press the reset key. The count is cleared.

Clearing all service call counts

1. Display “CLE” using the copy exposure adjustment keys.

2. Press the start key. The counts are cleared.

Completion

Press the stop/clear key. The indication for selecting a maintenance item No. appears.

CLE

1-4-37

2BV

Maintenance

item No. U906 Resetting partial operation control

Description

Resets the service call code for partial operation control.

Purpose

To be reset after partial operation is performed due to problems in the drawers or other sections, and the related parts are serviced.

Method

1. Press the start key.

2. Select “on” using the zoom +/– keys.

Display Operation

––– Canceling the resetting on Executing the resetting

3. Press the start key to reset partial operation control. The maintenance mode is exited, and the machine returns to the same status as when the main switch is turned on.

Description

1-4-38

2BV

Maintenance

item No.

U910 Clearing the black ratio data

Description

Clears the accumulated black ratio data f or A4/11" × 81/2" sheets.

Purpose

To clear data as required at times such as during maintenance service.

Method

1. Press the start key.

2. Select “on” using the zoom +/– keys.

Display Operation

––– Canceling the clearing on Executing the clearing

3. Press the start key. The accumulated black ratio data is cleared.

Completion

To exit this maintenance item without clearing the data, press the stop/clear key. The indication for selecting a maintenance item No. appears.

U917 Setting the reading/writing of backup data

Description

Selects whether to read out the backup data on the main PCB to the NVRAM on the memory tool PCB or to write backup data on the NVRAM on the memory tool PCB to the main PCB. When the memory is initialized (maintenance items U020, U021, U022 and U252), this is set to read out the backup data from the main PCB to the NVRAM on the memory tool PCB. To write the backup data to the main PCB from the NVRAM on the memory tool PCB, change the setting before starting writing.

Purpose

Used when replacing the main PCB.

Method

1. Press the start key.

2. Select “rd” or “rE” using the zoom +/– keys.

Display Description

rd Reading out the backup data rE Writing the backup data

3. Press the start key.

Completion

To exit this maintenance item without changing the current setting, press the stop/clear key. The indication for selecting a maintenance item No. appears.

Description

1-4-39

2BV

Maintenance

item No. U990 Checking/clearing the time for the exposure lamp to light

Description

Displays or clears the accumulated time for the exposure lamp to light.

Purpose

To check duration of use of the exposure lamp. Also to clear the accumulated time for the lamp after replacement.

Method

1. Press the start key.

2. Change the indication of the copy quantity display by lighting a copy exposure indicator using the copy exposure adjustment keys.

Copy exposure indicator Copy quantity display

Exp. 1 First 3 digits of the lamp-on time (minutes) Exp. 2 Last 3 digits of the lamp-on time (minutes) Exp. 3 Clearing the lamp-on time (CLE)

Clearing

1. Light exp. 3.

2. Press the start key. The accumulated time is cleared, and the indication for selecting a maintenance item No. appears.

Completion

To exit this maintenance item without changing the accumulated time, press the stop/clear key. The indication for selecting a maintenance item No. appears.

Description

1-4-40

2BV

Maintenance

item No.

U993 Outputting a VTC-PG pattern

Description

Selects and outputs a VTC-PG pattern created in the copier.

Purpose

When performing respective image printing adjustments, used to check the machine status apart from that of the scanner with a non-scanned output VTC-PG pattern.

Method

1. Press the start key.

2. Select the VTC-PG pattern to be output using the copy exposure adjustment keys.

Display PG pattern to be output Purpose

Description

• Center line adjustment

• Lateral squareness adjustment

• Magnification adjustment

• Checking the fixing performance (fixing pressure)

3. Press the interrupt key. The machine enters the PG pattern output mode.

4. Press the start key. A VTC-PG pattern is output.

Completion

Press the stop/clear key. The indication for selecting a maintenance item No. appears.

1-4-41

2BV

Maintenance

item No. U998 Outputting the memory list

Description

Outputs the list of memory.

Purpose

To output the list as required.

Method

Press the start key.

Entering the address

1. Select the item by lighting a copy exposure indicator using the copy exposure adjustment keys.

Copy exposure indicator Description Setting range

Exp. 1 Bit 16 to bit 23 of the address 00 to FF Exp. 2 Bit 8 to bit 15 of the address 00 to FF Exp. 3 Bit 0 to bit 7 of the address 00 to FF

2. Enter the address in hexadecimal using the numeric keys or the zoom +/– keys.

3. Press the start key. The address is set.

Printing the list

1. Press the interrupt key. The machine enters the list output mode.

2. Press the start key. The list is printed.

Completion

Press the stop/clear key. The indication for selecting a maintenance item No. appears.

Description

1-4-42

2BV

1-5-1 Paper misfeed detection

(1) Paper misfeed indication

When a paper misfeed occurs, the copier immediately stops copying and displays the jam location on the operation panel. Paper misfeed counts sorted by the detection condition can be checked in maintenance item U903. To remove paper jammed in the copier, open the front cover, paper conveying unit or drawer. Paper misfeed detection can be reset by opening and closing the respective covers to turn safety switch 1 or 2 off and on.

1 Drawer 2 Paper conveying section

Figure 1-5-1

Jam code Contents See pape

10 14 20 22 30 40 50

No paper feed from drawer No paper feed from bypass Multiple sheets in copier paper feed section Multiple sheets in bypass tray Misfeed in registration/transfer section Misfeed in fixing section Misfeed in eject section

P.1-5-3 P.1-5-3 P.1-5-3 P.1-5-3 P.1-5-3 P.1-5-4 P.1-5-4

1-5-1

2BV

(2) Paper misfeed detection conditions

ESW

RSW

Figure 1-5-2

1-5-2

2BV

1. Jam at power-on

• One or more of the switches in the paper feed conveying system is on when the main switch is turned on (jam code 00).

2. Paper feed section

• No paper feed from drawer (jam code 10) The registration switch (RSW) does not turn on within 980 ms of the paper feed clutch (PFCL) turning on.

PFCL OFF

RSW

980 ms

Timing chart 1-5-1

• No paper feed from bypass (jam code 14) The registration switch (RSW) does not turn on within 1400 ms of the bypass paper feed clutch (BYPPFCL) turning on.

BYPPFCL OFF

RSW

1400 ms

OFF ON

ON OFF ON

Timing chart 1-5-2

• Multiple sheets in copier paper feed section (jam code 20) The registration switch (RSW) does not turn off within the time required to convey the length of the used paper size plus 2000 ms of turning on (when paper is fed from the drawer).

RSW OFF

Paper size + 2000 ms

Timing chart 1-5-3

• Multiple sheets in bypass tray (jam code 22) The registration switch (RSW) does not turn off within 6320 ms of turning on (when paper is fed from the bypass tray).

RSW OFF

6320 ms

Timing chart 1-5-4

3. Paper conveying section

• Misfeed in registration/transfer section (jam code 30) The registration switch (RSW) turns on within 100 ms of turning off.

RSW

100 ms

Timing chart 1-5-5

OFF ON

1-5-3

2BV

4. Fixing section

• Misfeed in fixing section (jam code 40) The eject switch (ESW) does not turn off within 2475 ms of the registration clutch (RCL) turning on.

RCL OFF

ESW

2475 ms

OFF ON

Timing chart 1-5-6

5. Eject section

• Misfeed in eject section (jam code 50) The eject switch (ESW) does not turn off within 2475 ms of the registration switch (RSW) turning off.

OFF

RSW

2475 ms

ESW

Timing chart 1-5-7

ON OFF ON

1-5-4

(3) Paper misfeeds

Problem Causes/check procedures Corrective measures

(1) A paper jam in the paper feed, conveying, fixing or eject section is indicated as soon as the main switch is turned on.

A piece of paper torn from copy paper is caught around the registration switch or the eject switch.

Defective registration switch.

Defective eject switch.

Check visually and remove any found.

With 5 V DC present at CN3-6 on the main PCB, check if CN3-7 on the main PCB remains low when the registration switch is turned on and off. If it does, replace the registration switch.

With 5 V DC present at CN12-7 on the main PCB, check if CN12-6 on the main PCB remains low when the eject switch is turned on and off. If it does, replace the eject switch.

2BV

(2) A paper jam in the paper feed section is indicated during copying (no paper feed from drawer). Jam code 10

(3) A paper jam in the paper feed section is indicated during copying (no paper feed from bypass). Jam code 14

Paper in the drawer is extremely curled.

Check if the paper feed pulleys are deformed.

Broken registration switch actuator.

Defective registration switch.

Check if the paper feed clutch malfunctions.

Electrical problem with the paper feed clutch.

Paper in the bypass tray is extremely curled.

Check if the bypass paper feed pulleys are deformed.

Broken registration switch actuator.

Defective registration switch.

Change the paper.

Check visually and replace the pulleys if deformed. (see page 16-3).

Check visually and replace the registration switch if its actuator is broken.

With 5 V DC present at CN3-6 on the main PCB, check if CN3-7 on the main PCB remains low when the registration switch is turned on and off. If it does, replace the registration switch.

Check and remedy if necessary.

Check (see page 1-5-20).

Change the paper.

Check visually and replace the pulleys if deformed (see page 16-5).

Check visually and replace the registration switch if its actuator is broken.

With 5 V DC present at CN3-6 on the main PCB, check if CN3-7 on the main PCB remains low when the registration switch is turned on and off. If not, replace the registration switch.

(4) A paper jam in the paper feed section is indicated during copying (multiple sheets in paper feed section). Jam code 20

Check if the bypass paper feed clutch malfunctions.

Electrical problem with the bypass paper feed clutch.

Broken registration switch actuator.

Defective registration switch.

Check if the right and left registration rollers contact each other.

Check and remedy if necessary.

Check (see page 1-5-20).

Check visually and replace the registration switch if its actuator is broken.

With 5 V DC present at CN3-6 on the main PCB, check if CN3-7 on the main PCB remains low when the registration switch is turned on and off. If it does, replace the registration switch.

Check visually and remedy if necessary.

1-5-5

2BV

Problem Causes/check procedures Corrective measures

(5) A paper jam in the paper feed section is indicated during copying (multiple sheets in bypass). Jam code 22

Broken registration switch actuator.

Defective registration switch.

Check if the right and left registration rollers contact each other.

Check visually and replace the registration switch if its actuator is broken.

With 5 V DC present at CN3-6 on the main PCB, check if CN3-7 on the main PCB remains low when the registration switch is turned on and off. If it does, replace the registration switch.

Check visually and remedy if necessary.

(6) A paper jam in the paper conveying section is indicated during copying (jam in registration/ transfer section). Jam code 30

(7) A paper jam in the fixing section is indicated during copying (jam in fixing section). Jam code 40

(8) A paper jam in the eject section is indicated during copying (jam in eject section). Jam code 50

Broken registration switch actuator.

Defective registration switch.

Check if the registration clutch malfunctions.

Electrical problem with the registration clutch.

Broken eject switch actuator.

Defective eject switch.

Broken registration switch actuator.

Defective registration switch.

Broken eject switch actuator.

Check visually and replace the registration switch if its actuator is broken.

With 5 V DC present at CN3-6 on the main PCB, check if CN3-7 on the main PCB remains low when the registration switch is turned on and off. If it does, replace the registration switch.

Check and remedy if necessary.

Check (see page 1-5-20).

Check visually and replace the eject switch if its actuator is broken.

With 5 V DC present at CN12-7 on the main PCB, check if CN12-6 on the main PCB remains low when the eject switch is turned on and off. If it does, replace the eject switch.

Check visually and replace the registration switch if its actuator is broken.

With 5 V DC present at CN3-6 on the main PCB, check if CN3-7 on the main PCB remains low when the registration switch is turned on and off. If it does, replace the registration switch.

Check visually and replace the eject switch if its actuator is broken.

1-5-6

Defective eject switch.

With 5 V DC present at CN12-7 on the main PCB, check if CN12-6 on the main PCB remains low when the eject switch is turned on and off. If it does, replace the eject switch.

2BV

1-5-2 Self-diagnosis

(1) Self-diagnostic function

This unit is equipped with a self-diagnostic function. When a problem is detected, copying is disabled. "C" and a number between 011 and 740 altenates, indicating the nature of the problem. After removing the problem, the self-diagnostic function can be reset by turning safety switch 1or 2 off and back on.

(2) Self diagnostic codes

Code Contents

C011

Backup memory data problem

• Data in the specified area of the backup memory does not match the specified values.

Causes Check procedures/corrective measures

Defective main PCB.

Replace the main PCB and check for correct operation.

Remarks

C100

C104

Exposure lamp problem

• Check the CCD input value for the lighting status of the exposure lamp 100 ms after the exposure lamp is lit and the carriage is moved to the shading position. If the exposure lamp does not light, turn off the lamp. After 500 ms, light the lamp again and, a further 500 ms later, check the CCD input. The exposure lamp does not light after 5 retries.

Optical system problem

• After AGC, correct input is not obtained at CCD.

Poor contact of the connector terminals.

Defective exposure lamp.

Defective main PCB.

Incorrect shading position.

CCD PCB output problem.

Poor contact of the connector terminals.

CCD PCB output problem.

Defective main PCB.

Check the connection of connectors CN24, CN23, CN22 and CN3 on the main PCB, and the continuity across the connector terminals. Repair or replace if necessary.

Replace the exposure lamp or inverter PCB.

Replace the main PCB and check for correct operation.

Adjust the position of the contact glass (shading plate). If the problem still occurs, replace the scanner home position switch.

Replace the ISU.

Check the connection of connectors CN23, CN22 and CN3 on the main PCB, and the continuity across the connector terminals. Repair or replace if necessary.

Replace the ISU.

Replace the main PCB and check for correct operation.

C200

Drive motor problem

• LOCK ALM signal remains high for 1 s, 1 s after the drive motor has turned on.

Poor contact of the drive motor connector terminals.

Reinsert the connector. Also check for continuity within the connector cable. If none, repair or replace the cable.

1-5-7

2BV

Code Contents

C200

C310

C400

Drive motor problem

• LOCK ALM signal remains high for 1 s, 1 s after the drive motor has turned on.

Scanner carriage problem

• The home position is not correct when the power is turned on or at the start of copying using the contact glass.

Polygon motor synchronization problem

• The polygon motor does not reach a stable speed within 19 s of the polygon motor remote signal turning on.

Remarks

Causes Check procedures/corrective measures

Defective drive motor rotation control circuit.

Defective drive transmission system.

Poor contact of the connector terminals.

Defective scanner home position switch.

Defective main PCB.

Defective scanner motor.

Poor contact of the polygon motor connector terminals.

Replace the drive motor.

Check if the rollers and gears rotate smoothly. If not, grease the bushings and gears. Check for broken gears and replace if any.

Check the connection of connectors CN28 and CN25 on the main PCB and the continuity across the connector terminals. Remedy or replace if necessary.

Replace the scanner home position switch.

Replace the main PCB and check for correct operation.

Replace the scanner motor.

Reinsert the connector. Also check for continuity within the connector cable. If none, repair or replace the cable.

C401

C420

C510

Polygon motor steady-state problem

• The polygon motor rotation is not stable for 400 ms after the polygon motor rotation has been stabilized.

BD steady-state problem

• The VTC detects a BD error for 800 ms after the polygon motor rotation has been stabilizad.

Main charger problem

• MC ALM signal is detected continuously for 800 ms when MC REM signal is turned on.

Poor contact of the polygon motor connector terminals.

Defective power source PCB.

Poor contact of the laser scanner unit connector terminals.

Defective LSU. Defective main

PCB. Poor contact of

the high-voltage transformer PCB connector terminals.

Defective highvoltage transformer PCB.

Reinsert the connector. Also check for continuity within the connector cable. If none, repair or replace the cable.

Check if 24 V DC is present at CN3-1 and CN3-2 on the power source PCB. If not, replace the power source PCB.

Reinsert the connector. Also check for continuity within the connector cable. If none, repair or replace the cable.

Replace the LSU. Replace the main PCB and check for

correct operation. Reinsert the connector. Also check for

continuity within the connector cable. If none, repair or replace the cable.

Replace the high-voltage transformer PCB.

1-5-8

Leakage during main charging.

Check and clean the main charger assembly.

2BV

Code Contents

C510

C610

Main charger problem

• MC ALM signal is detected

continuously for 800 ms when MC REM signal is turned on.

Broken fixing heater wire

• Warm-up does not end within 90 s.

• The secondary stabilization fixing

temperature drops to 100°C/212°F or below.

• The fixing temperature remains below

40˚C/104˚F for 7 s or longer after the fixing heaters have been turned on.

Remarks

Causes Check procedures/corrective measures

Deformed highvoltage transformer PCB terminal spring.

Fixing heater installed incorrectly.

Broken fixing heater wire.

Poor contact in the fixing unit thermistor connector terminals.

Broken fixing unit thermistor wire.

Fixing unit thermistor installed incorrectly.

Replace the spring.

Check and reinstall if necessary.

Check for continuity. If none, replace fixing heater.

Check the connection of connector CN12 on the main PCB and the continuity across the connector terminals. Remedy or replace if necessary.

Measure the resistance. If it is ∞ Ω, replace the fixing unit thermistor.

Check and reinstall if necessary.

C620

Abnormally low fixing unit thermistor temperature

• The fixing temperature remains below

100˚C/212˚F for 10 s during copying.

Fixing unit thermostat triggered.

Fixing heater installed incorrectly.

Broken fixing heater wire.

Poor contact in the fixing unit thermistor connector terminals.

Broken fixing unit thermistor wire.

Fixing unit thermistor installed incorrectly.

Fixing unit thermostat triggered.

Check for continuity. If none, replace the fixing unit thermostat. Check the operation of the cooling fan and repair if necessary.

Check and reinstall if necessary.

Check for continuity. If none, replace fixing heater.

Check the connection of connector CN12 on the main PCB and the continuity across the connector terminals. Remedy or replace if necessary.

Measure the resistance. If it is ∞ Ω, replace the fixing unit thermistor.

Check and reinstall if necessary.

Check for continuity. If none, replace the fixing unit thermostat. Check the operation of the cooling fan and repair if necessary.

C630

Abnormally high fixing unit thermistor temperature

• The fixing temperature exceeds

240˚C/464˚F for 10 s.

Shorted fixing unit thermistor.

Broken fixing heater control circuit on the power source PCB.

Measure the resistance. If it is 0 Ω, replace the fixing unit thermistor.

Replace the power source PCB.

1-5-9

2BV

Code Contents

C710

C730

C731

Toner sensor problem

• The sensor output voltage is outside the range of 0.5 to 4.5 V during toner control.

• The toner sensor control voltage cannot be set within the setting range when maintenance item U130 is run.

Broken external temperature thermistor wire

• The input voltage is above 4.5 V.

Short-circuited external temperature thermistor

• The input voltage is below 0.5 V.

Remarks

Causes Check procedures/corrective measures

Defective toner sensor.

Poor contact of the toner sensor connector terminals.

Developer problem.

Poor contact of the humidity sensor PCB connector terminals.

Defective external temperature thermistor.

Poor contact of the humidity sensor PCB connector terminals.

Replace the toner sensor.

Reinsert the connector. Also check for continuity within the connector cable. If none, repair or replace the cable.

Replace the developer.

Reinsert the connector. Also check for continuity within the connector cable. If none, repair or replace the cable.

Replace the humidity sensor PCB.

Reinsert the connector. Also check for continuity within the connector cable. If none, repair or replace the cable.

C740

Image formation unit connector insertion problem

• Absence of the image formation unit is detected continuously for 1500 ms while there is no error on the copier.

Defective external temperature thermistor.

Image formation unit connector inserted incorrectly.

Defective image formation unit connector.

Replace the humidity sensor PCB.

Reinsert the image formation unit connector if necessary.

Replace the image formation unit.

1-5-10

1-5-3 Image formation problems

2BV

(1) No image appears

(entirely white).

See page 1-5-12

(5) A white line appears

longitudinally.

See page 1-5-13

(9) Black dots appear on

the image.

(2) No image appears

(entirely black).

See page 1-5-12

(6) A black line appears

longitudinally.

See page 1-5-14

(10)Image is blurred.

(3) Image is too light.

See page 1-5-13

(7) A black line appears

laterally.

See page 1-5-14

(11)The leading edge of the

image is consistently misaligned with the original.

(4) Background is visible.

See page 1-5-13

(8) One side of the copy

image is darker than the other.

See page 1-5-14

(12)The leading edge of the

image is sporadically misaligned with the original.

See page 1-5-15

(13)Paper creases.

See page 1-5-16

(17)Image is out of focus.

See page 1-5-17

See page 1-5-15

(14)Offset occurs.

See page 1-5-16

(18)Image center does not

align with the original center.

See page 1-5-17

See page 1-5-15

(15)Image is partly missing.

See page 1-5-17

(19)Image is not square.

See page 1-5-18

See page 1-5-16

(16)Fixing is poor.

See page 1-5-17

(20)Image contrast is low

(carrier scattering).

See page 1-5-18

1-5-11

2BV

(1) No image appears

(entirely white).

Causes Check procedures/corrective measures

1. No transfer charging. A. Broken transfer wire. B. The connector terminals of the high-voltage

transformer PCB make poor contact.

C. Defective main PCB

D. Defective high-voltage transformer PCB.

Causes

1. No transfer charging.

Replace or repair the wire. Reinsert the connector. Also check for continuity within the

connector cable. If none, remedy or replace the cable. Check if CN4-5 on the main PCB goes low when maintenance item

U101 is run. If not, replace the main PCB. Check if transfer charging takes place when CN1-5 on the high-

voltage transformer PCB goes low while maintenance item U101 is run. If not, replace the high-voltage transformer PCB.

(2) No image appears

(entirely black).

1. No main charging. A. Broken main charger wire. B. Leaking main charger housing. C. The connector terminals of the high-voltage

transformer PCB make poor contact.

D. Defective main PCB.

E. Defective high-voltage transformer PCB.

2. Exposure lamp fails to light. A. The connector terminals of the exposure

lamp make poor contact.

B. Defective inverter PCB.

C. Defective main PCB.

Causes

1. No main charging.

2. Exposure lamp fails to light.

Causes Check procedures/corrective measures

Replace the wire. Clean the main charger wire, grid and shield. Reinsert the connector. Also check for continuity within the

connector cable. If none, remedy or replace the cable. Check if CN4-3 on the main PCB goes low when maintenance item

U100 is run. If not, replace the main PCB. Check if main charging takes place when CN1-7 on the high-voltage

transformer PCB goes low while maintenance item U100 is run. If not, replace the high-voltage transformer PCB.

Reinsert the connector. Also check for continuity within the connector cable. If none, remedy or replace the cable.

Check if the exposure lamp lights when CN1-5 and 1-6 on the inverter PCB go low while maintenance item U061 is run. If not, replace the inverter PCB.

Check if CN24-1 and 24-2 on the main PCB go low when maintenance item U061 is run. If not, replace the main PCB.

1-5-12

2BV

(3) Image is too

light.

Causes Check procedures/corrective measures

1. Insufficient toner.

2. Deteriorated developer.

3. Dirty or deteriorated drum.

(4) Background is visible.

Causes

1. Insufficient toner.

2. Deteriorated developer.

3. Dirty or deteriorated drum.

If the display shows the message requesting toner replenishment, replace the cartridge.

Check the number of copies made with the current developer. If it has reached the specified limit, replace the developer.

Clean the drum or, if the maintenance level has been reached, replace the drum (see page 1-6-34).

Causes

1. Deteriorated developer.

Causes Check procedures/corrective measures

1. Deteriorated developer. Check the number of copies made with the current developer. If it has reached the specified limit, replace the developer.

(5) A white line appears

longitudinally.

Causes

1. Dirty or flawed main charger wire.

2. Foreign matter in the developing section.

3. Flawed drum.

4. Dirty shading plate.

Causes Check procedures/corrective measures

1. Dirty or flawed main charger wire.

2. Foreign matter in the developing section.

Clean the main charger wire or, if it is flawed, replace it. Check if the magnetic brush is formed uniformly. If not, replace the

developer.

3. Flawed drum.

4. Dirty shading plate.

Replace the drum (see page 1-6-34). Clean the shading plate.

1-5-13

2BV

(6) A black line appears

longitudinally.

Causes

1. Dirty contact glass.

2. Dirty or flawed drum.

3. Deformed or worn cleaning blade.

4. Dirty scanner mirror.

Causes Check procedures/corrective measures

1. Dirty contact glass.

2. Dirty or flawed drum.

3. Deformed or worn cleaning blade.

4. Dirty scanner mirror.

(7) A black line ap-

pears laterally.

Causes

1. Flawed drum.

2. Dirty developing section.

3. Leaking main charger housing.

Clean the contact glass. Clean the drum or, if it is flawed, replace it (see page 1-6-34). Replace the cleaning blade (see page 1-6-37). Clean the scanner mirror.

Causes Check procedures/corrective measures

1. Flawed drum.

2. Dirty developing section.

3. Leaking main charger housing.

(8) One side of the

copy image is darker than the

Causes

1. Dirty main charger wire.

2. Defective exposure lamp.

other.

Causes Check procedures/corrective measures

1. Dirty main charger wire.

2. Defective exposure lamp.

Replace the drum (see page 1-6-34). Clean any part contaminated with toner or carrier in the developing

section. Clean the main charger wire, grid and shield.

Clean the wire or, if it is extremely dirty, replace it. Check if the exposure lamp light is distributed evenly. If not, replace

the exposure lamp (see page 1-6-13).

1-5-14

2BV

(9) Black dots appear

on the image.

Causes

1. Dirty or flawed drum.

2. Dirty contact glass.

3. Deformed or worn cleaning blade.

Causes Check procedures/corrective measures

1. Dirty or flawed drum.

2. Dirty contact glass.

3. Deformed or worn cleaning blade.

(10)Image is blurred.

Causes

1. Scanner moves erratically.

2. Deformed press roller.

3. Paper conveying section drive problem.

Causes Check procedures/corrective measures

1. Scanner moves erratically.

2. Deformed press roller.

3. Paper conveying section drive problem.

Clean the drum or, if it is flawed, replace it (see page 1-6-34). Clean the contact glass. Replace the cleaning blade (see page 1-6-37).

Check if there is any foreign matter on the front and rear scanner rails. If any, remove it.

Replace the press roller (see page 1-6-44). Check the gears and belts and, if necessary, grease them.

(11)The leading edge of

the image is consistently misaligned with the original.

Causes

1. Misadjusted leading edge registration.

2. Misadjusted scanner leading edge registration.

Causes Check procedures/corrective measures

1. Misadjusted leading edge registration.

2. Misadjusted scanner leading edge registration.

Readjust the leading edge registration (see pages 1-6-9). Readjust the scanner leading edge registration (see page 1-6-28).

1-5-15

2BV (12)The leading edge of

the image is sporadically misaligned with the original.

Causes

1. Registration clutch, bypass paper feed clutch or paper feed clutch installed or operating incorrectly.

Causes Check procedures/corrective measures

1. Registration clutch, bypass paper feed clutch or paper feed clutch installed or operating incorrectly.

(13)Paper creases. Causes

1. Paper curled.

2. Paper damp.

3. Defective pressure springs.

Check the installation position and operation of the registration clutch, bypass paper feed clutch and paper feed clutches. If any of them operates incorrectly, replace it.

Causes Check procedures/corrective measures

1. Paper curled. Check the paper storage conditions.

2. Paper damp. Check the paper storage conditions.

3. Defective pressure springs. Replace the pressure springs.

(14)Offset occurs.

Causes

1. Defective cleaning blade.

2. Defective pressure springs.

3. Incorrect fixing temperature.

Causes Check procedures/corrective measures

1. Defective cleaning blade. Replace the cleaning blade (see page 1-6-37).

2. Defective pressure springs. Replace the pressure springs.

3. Incorrect fixing temperature. Run maintenance item U161 and check the fixing temperature.

1-5-16

2BV

(15)Image is partly miss-

ing.

Causes

1. Paper damp.

2. Paper creased.

3. Drum condensation.

4. Flawed drum.

Causes Check procedures/corrective measures

1. Paper damp. Check the paper storage conditions.

2. Paper creased. Replace the paper.

3. Drum condensation. Clean the drum.

4. Flawed drum. Replace the drum (see page 1-6-34).

(16)Fixing is poor. Causes

1. Wrong paper.

2. Defective pressure springs.

3. Flawed press roller.

Causes Check procedures/corrective measures

1. Wrong paper. Check if the paper meets specifications.

2. Defective pressure springs. Replace the pressure springs.

3. Flawed press roller. Replace the press roller (see page 1-6-44).

(17)Image is out of

focus.

Causes

1. Defective image scanning unit.

Causes Check procedures/corrective measures

1. Defective image scanning unit. Replace the image scanning unit (see page 1-6-22).

(18)Image center does not

align with the original center.

Causes

1. Misadjusted center line of image printing.

2. Misadjusted scanner center line.

3. Original placed incorrectly.

Causes Check procedures/corrective measures

1. Misadjusted center line of image printing. Readjust the center line of image printing (see pages 1-6-10).

2. Misadjusted scanner center line. Readjust the scanner center line (see page 1-6-29).

3. Original placed incorrectly. Place the original correctly.

1-5-17

2BV

(19)Image is not

square.

Causes

1. Laser scanner unit positioned incorrectly.

2. Image scanning unit positioned incorrectly.

Causes Check procedures/corrective measures

1. Laser scanner unit positioned incorrectly.

2. Image scanning unit positioned incorrectly.

(20)Image contrast is

low (carrier scatter-

Causes

1. No developing bias output.

ing).

Adjust the installation position of the laser scanner unit (see page 1-6-20).

Adjust the installation position of the image scanning unit (see page 1-6-24).

Causes Check procedures/corrective measures

1. No developing bias output.

A. Developing bias wire makes poor contact. B. Defective main PCB.

C. Defective high-voltage transformer PCB.

Check the developing bias wire. If there are any problems, replace it. Check if CN4-4 on the main PCB goes low when maintenance item

U030 is run. If not, replace the main PCB. Check if developing bias is output when there is no problem with the

main PCB while maintenance item U030 is run. If not, replace the high-voltage transformer PCB.

1-5-18

1-5-4 Electrical problems

Problem Causes Check procedures/corrective measures

(1) The machine does not operate when the main switch is turned on.

No electricity at the power outlet.

The power cord is not plugged in properly.

The front cover and/or paper conveying unit are/is not closed completely.

Measure the input voltage.

Check the contact between the power plug and the outlet.

Check the front cover and paper conveying unit.

2BV

(2) The drive motor does not operate (C200).

(3) The scanner motor does not operate.

Broken power cord. Defective main switch.

Blown fuse in the power source PCB.

Defective safety switch 1 or 2.

Defective power source PCB.

Poor contact in the drive motor connector terminals.

Broken drive motor gear. Defective drive motor.

Broken scanner motor coil.

Poor contact in the scanner motor connector terminals.

Check for continuity. If none, replace the cord. Check for continuity across the contacts. If none, replace the

main switch. Check for continuity. If none, remove the cause of blowing and

replace the fuse. Check for continuity across the contacts of each switch. If none,

replace the switch. With AC present, check for 3.3 V DC at CN3-9 on the power

source PCB, 5 V DC at CN3-5 and CN3-6, 12 V DC at CN4-3 and 24 V DC at CN3-1 and CN3-2. If none, replace the power source PCB.

Reinsert the connector. Also check for continuity within the connector cable. If none, remedy or replace the cable.

Check visually and replace the drive motor if necessary. Run maintenance item U030 and check if the drive motor

operates when CN12-16 on the main PCB goes low. If not, replace the drive motor.

Check for continuity across the coil. If none, replace the scanner motor.

Reinsert the connector. Also check for continuity within the connector cable. If none, remedy or replace the cable.

(4) The toner feed motor does not operate.

(5) Cooling fan motor 1 does not operate.

(6) Cooling fan motor 2 does not operate.

Broken toner feed motor coil.

Poor contact in the toner feed motor connector terminals.

Broken cooling fan motor 1 coil.

Poor contact in the cooling fan motor 1 connector terminals.

Broken cooling fan motor 2 coil.

Poor contact in the cooling fan motor 2 connector terminals.

Check for continuity across the coil. If none, replace the toner feed motor.

Reinsert the connector. Also check for continuity within the connector cable. If none, repair or replace the cable.

Check for continuity across the coil. If none, replace cooling fan motor 1.

Reinsert the connector. Also check for continuity within the connector cable. If none, repair or replace the cable.

Check for continuity across the coil. If none, replace cooling fan motor 2.

Reinsert the connector. Also check for continuity within the connector cable. If none, repair or replace the cable.

1-5-19

2BV

Problem Causes Check procedures/corrective measures

(7) Cooling fan motor 3 does not operate.

Broken cooling fan motor 3 coil.

Poor contact in the cooling fan motor 3 connector terminals.

Check for continuity across the coil. If none, replace cooling fan motor 3.

Reinsert the connector. Also check for continuity within the connector cable. If none, repair or replace the cable.

(8) The registration clutch does not operate.

(9) The paper feed clutch does not operate.

(10) The bypass paper feed clutch does not operate.

(11) The cleaning lamp does not turn on.

(12) The exposure lamp does not turn on.

Broken registration clutch coil.

Poor contact in the registration clutch connector terminals.

Broken paper feed clutch coil.

Poor contact in the paper feed clutch connector terminals.

Broken bypass paper feed clutch coil.

Poor contact in the bypass paper feed clutch connector terminals.

Poor contact in the cleaning lamp connector terminals.

Defective cleaning lamp. Poor contact in the

exposure lamp connector terminals.

Check for continuity across the coil. If none, replace the registration clutch.

Reinsert the connector. Also check for continuity within the connector cable. If none, remedy or replace the cable.

Check for continuity across the coil. If none, replace the paper feed clutch.

Reinsert the connector. Also check for continuity within the connector cable. If none, remedy or replace the cable.

Check for continuity across the coil. If none, replace the bypass paper feed clutch.

Reinsert the connector. Also check for continuity within the connector cable. If none, remedy or replace the cable.

Check for continuity. If none, replace the cleaning lamp. Reinsert the connector. Also check for continuity within the

connector cable. If none, remedy or replace the cable.

(13) The exposure lamp does not turn off.

(14) The fixing heater does not turn on (C610).

(15) The fixing heater does not turn off.

Defective inverter PCB.

Broken wire in fixing heater.

Fixing unit thermostat triggered.

Broken fixing unit thermistor wire.

Dirty sensor part of the fixing unit thermistor.

If the exposure lamp does not turn on when CN24-1 and CN24-2 on the inverter PCB are held low, replace the inverter PCB.

If the exposure lamp does not turn off when CN24-1 and CN24-2 on the inverter PCB are held high, replace the inverter PCB.

Check for continuity across the heater. If none, replace the heater.

Check for continuity across the thermostat. If none, remove the cause and replace the thermostat.

Measure the resistance. If it is ∞ Ω, replace the fixing unit thermistor.

Check visually and clean the thermistor sensor parts.

1-5-20

Problem Causes Check procedures/corrective measures

(16) Main charging is not performed (C510).

Broken main charger wire. Leaking main charger

housing. Poor contact in the high-

voltage transformer PCB connector terminals.

Defective main PCB. Defective high- voltage

transformer PCB .

See page 1-5-12.

2BV

(17) Transfer charging is not performed.

(18) No developing bias is output.

(19) The message requesting paper to be loaded is shown when paper is present in the drawer.

Poor contact in the highvoltage transformer PCB connector terminals.

Defective main PCB. Defective high-voltage

transformer PCB . Poor contact in the

developing bias wire. Poor contact in the high-

voltage transformer PCB connector terminals.

Defective high-voltage transformer PCB .

Poor contact in the paper switch connector terminals.

Defective paper switch.

See page 1-5-12.

Check the developing bias wire. If there is any problem, replace it.

Reinsert the connector. Also check for continuity within the connector cable. If none, remedy or replace the cable.

Check if the developing bias is output when CN1-3 on the highvoltage transformer PCB goes low while maintenance item U030 is run. If not, replace the high-voltage transformer PCB.

Reinsert the connector. Also check for continuity within the connector cable. If none, remedy or replace the cable.

Check if CN3-10 on the main PCB goes low when the paper switch is turned on with 5 V DC present at CN3-11 on the main PCB. If not, replace the paper switch.

(20) A paper jam in the paper feed, paper conveying or fixing section is indicated when the main switch is turned on.

A piece of paper torn from copy paper is caught around the registration switch or eject switch.

Defective registration switch.

Defective eject switch.

Check and remove if any.

With 5 V DC present at CN3-6 on the main PCB, check if CN3-7 on the main PCB remains low when the registration switch is turned on and off. If it does, replace the registration switch.

With 5 V DC present at CN12-7 on the main PCB, check if CN12-6 on the main PCB remains low when the eject switch is turned on and off. If it does, replace the eject switch.

1-5-21

2BV

Problem Causes Check procedures/corrective measures

(21) The message requesting covers to be closed is displayed when the front cover and paper conveying unit are closed.

Poor contact in the connector terminals of safety switch 1 or 2.

Defective safety switch 1 or 2.

Reinsert the connector. Also check for continuity within the connector cable. If none, remedy or replace the cable.

Check for continuity across the contacts of each switch. If there is no continuity when the switch is on, replace it.

(22) Others.

Wiring is broken, shorted or makes poor contact.

Noise.

Check for continuity. If none, repair.

Locate the source of noise and remove.

1-5-22

1-5-5 Mechanical problems

Problem Causes/check procedures Corrective measures

(1) No primary paper feed.

Check if the surfaces of the following pulleys are dirty with paper powder: paper feed pulleys and bypass paper feed pulleys.

2BV

Clean with isopropyl alcohol.

(2) No secondary paper feed.

(3) Skewed paper feed.

(4) The scanner does not travel.

(5) Multiple sheets of paper are fed at one time.

Check if the paper feed pulleys are deformed.

Electrical problem with the following electromagnetic clutches: paper feed clutch and bypass paper feed clutch.

Check if the surfaces of the left and right registration rollers are dirty with paper powder.

Electrical problem with the registration clutch.

Width guide in a drawer installed incorrectly.

Deformed width guide in a drawer. Check if a pressure spring along the paper

conveying path is deformed or out of place. Check if the scanner wire is loose.

The scanner motor malfunctions. Deformed drawer claw.

Check if the paper is curled.

Check visually and replace any deformed pulleys (see page 1-6-3).

See pages 1-5-20.

Clean with isopropyl alcohol.

See page 1-5-20.

Check the width guide visually and correct or replace if necessary.

Repair or replace if necessary . Repair or replace.

Reinstall the scanner wire (see page 1-6-

15). See page 1-5-19. Check the drawer claw visually and correct

or replace if necessary. Change the paper.

(6) Paper jams.

(7) Toner drops on the paper conveying path.

(8) Abnormal noise is heard.

Check if the paper is excessively curled. Deformed guides along the paper conveying

path. Check if the contact between the right and

left registration rollers is correct.

Check if the press roller is extremely dirty or deformed.

Check if the contact between the heat roller and its separation claws is correct.

Check if the developing section of the image formation unit is extremely dirty.

Check if the pulleys, rollers and gears operate smoothly.

Check if the following electromagnetic clutches are installed correctly: paper feed clutch and bypass paper feed clutch.

Change the paper. Check visually and replace any deformed

guides. Check visually and remedy if necessary.

Replace the pressure spring if it is deformed.

Clean or replace the press roller.

Repair if any springs are off the separation claws.

Clean the developing section of the image formation unit.

Grease the bearings and gears.

Correct.

1-5-23

1-6-1 Precautions for assembly and disassembly

(1) Precautions

• Be sure to turn the main switch off and disconnect the power plug before starting disassembly.

• When handling PCBs, do not touch connectors with bare hands or damage the board.

• Do not touch any PCB containing ICs with bare hands or any object prone to static charge.

• Use only the specified parts to replace the fixing unit thermostat. Never substitute electric wires, as the copier may be seriously damaged.

• Use the following testers when measuring voltages: Hioki 3200 Sanwa MD-180C Sanwa YX-360TR Beckman TECH300 Beckman DM45 Beckman 330* Beckman 3030* Beckman DM850* Fluke 8060A* Arlec DMM1050 Arlec YF1030C * Capable of measuring RMS values.

• Prepare the following as test originals:

1. NTC (new test chart)

2. NPTC (newspaper test chart)

2BV

1-6-1

Mita-Kyocera KM-1525 Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual