Mita-Kyocera SRDF-2 Service Manual

SRDF-2

SERVICE

MANUAL

Published in Apr. ’02

843C0110

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) Parts names .................................................................................................................................... 1-1-2

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

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

(1) Drive system .................................................................................................................................... 1-1-4

1-2 Handling Precautions

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

1-3 Installation

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

(1) Unpacking ........................................................................................................................................ 1-3-1

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 ............................................................................................. 1-4-3

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1-5 Troubleshooting

1-5-1 Original misfeed detection .................................................................................................................... 1-5-1

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

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

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

1-5-2 Image formation problems .................................................................................................................... 1-5-5

(1) There is a regular error between the centers of the original and copy image. ................................ 1-5-6

(2) There is a regular error between the leading edges of the original and copy image. ...................... 1-5-6

(3) There is a regular error between the trailing edges of the original and copy image. ....................... 1-5-6

1-5-3 Electrical problems ................................................................................................................................ 1-5-7

(1) The original feed motor does not operate. ....................................................................................... 1-5-7

(2) The original conveying motor does not operate. ............................................................................. 1-5-7

(3) The original feed solenoid does not operate. .................................................................................. 1-5-7

(4) The switchback feedshift solenoid does not operate. ...................................................................... 1-5-7

(5) The eject feedshift solenoid does not operate. ................................................................................ 1-5-7

(6) The switchback pressure solenoid does not operate. ..................................................................... 1-5-7

(7) The original feed clutch does not operate. ...................................................................................... 1-5-8

(8) A message indicating cover open is displayed when the DF is closed correctly. ............................ 1-5-8

(9) An original jams when the main switch is turned on. ....................................................................... 1-5-8

1-5-4 Mechanical problems ........................................................................................................................... 1-5-9

(1) No primary original feed. ................................................................................................................. 1-5-9

(2) No secondary original feed. ............................................................................................................. 1-5-9

(3) Originals jam. ................................................................................................................................... 1-5-9

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 Original feed section ............................................................................................................................. 1-6-3

(1) Detaching and refitting the DF forwarding pulley and DF feed pulley ............................................. 1-6-3

(2) Detaching and refitting the DF separation pulley ............................................................................. 1-6-4

(3) Adjusting the DF magnification ........................................................................................................ 1-6-8

(4) Adjusting the DF center line ............................................................................................................ 1-6-9

(5) Adjusting the scanning start position ............................................................................................. 1-6-10

(5-1) Adjusting the DF leading edge registration ........................................................................... 1-6-10

(5-2) Adjusting the DF trailing edge registration ............................................................................ 1-6-11

(6) Adjusting the margins for scanning the original from the DF ......................................................... 1-6-12

1-1-1

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2-1 Mechanical construction

2-1-1 Original feed section ............................................................................................................................. 2-1-1

(1) Original feed timing .......................................................................................................................... 2-1-2

2-1-2 Original switchback section ................................................................................................................... 2-1-3

(1) Operation of original switchback ...................................................................................................... 2-1-4

2-1-3 Original conveying section .................................................................................................................... 2-1-5

(1) Original switchback/conveying timing .............................................................................................. 2-1-6

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) Clutches and solenoids ................................................................................................................... 2-2-4

2-3 Operation of the PCBs

2-3-1 DF driver PCB ....................................................................................................................................... 2-3-1

2-4 Appendixes

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

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

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

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

Periodic maintenance procedures ................................................................................................................... 2-4-5

Connection diagram ........................................................................................................................................ 2-4-7

Wiring diagram ................................................................................................................................................ 2-4-8

1-1-2

1-1-1 Specifications

Type ............................................... Machine mounted type duplex sheet-through document feeder

Original feed system ...................... Automatic feed

Originals ......................................... Sheets

Original weights.............................. Single-sided original mode: 35 – 160 g/m

Double-sided original mode: 50 – 120 g/m

Original paper................................. Plain paper, thermal paper, art paper and colored paper

Original sizes .................................. A3 – A5R, folio/11" × 17" – 5

/2" × 81/2"

No. of originals ............................... Up to 70 sheets (A3, B4, folio, 11" × 17", 8

Up to 100 sheets (up to A4/11" × 8 Up to 30 sheets in the auto selection mode

Original processing speed.............. Original replacement: Max. 62 sheets/min (A4/11" × 81/2")

Original scanning: 167 mm/s (100%)

Power source ................................. Electrically connected to the copier (5 V DC and 24 V DC)

Dimensions .................................... 553 (W) × 478 (D) × 137 (H) mm

/4" (W) × 1813/16" (D) × 53/8" (H)

Weight ............................................Approx. 10.5 kg/23.1 lbs

/2")

/2" × 14")

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1-1-1

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1-1-2 Parts names and their functions

(1) Parts names

Figure 1-1-1

1 Original table 2 Original insert guides 3 DF original reversing cover 4 Original set indicator 5 Original eject cover 6 DF opening/closing lever 7 Ejection extension

1-1-2

1-1-3 Machine cross section

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Paper and original path

Figure 1-1-2 Machine cross section

1 Original feed section 2 Original switchback section 3 Original conveying section

1-1-3

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1-1-4 Drive system

(1) Drive system

Figure 1-1-3 Drive system (inside rear of machine)

1 Original feed motor pulley 2 Pulley 35/22/22 3 Idle gear 26 4 Original feed clutch gear 5 DF original feed pulley 18 6 DF forwarding pulley 18 7 Tension pulley 8 Original feed drive belt 9 DF forwarding belt

As viewed from machine rear

0 DF registration pulley 28/18 ! Idle gear 15 @ Idle gear 20 # Switch back gear 18 $ DF registration drive belt % Gear 22/35 ^ Original conveying motor pulley & Gear 28 * Original conveying drive belt 1

Figure 1-1-4 Drive system (inside front of machine)

1 Lower original conveying pulley 25/18 2 Gear 18/25 3 Eject gear 18 4 Middle original conveying pulley 18 5 Upper original conveying pulley 18 6 JAM release gear 24

As viewed from machine front

7 Joint gear 14 8 JAM release gear 14 9 Tension pulley 0 Eject drive belt ! Conveying drive belt 2

1-1-4

1-2-1 Installation environment

1. Installation location (Be based on the copier establishment place.)

• 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.

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a: 553 mm/21 b: 478 mm/18 c: 137 mm/5

/4"

/16"

/8"

Figure 1-2-1 Installation dimensions

1-2-1

1-3-1 Unpacking and installation

(1) Unpacking

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Figure 1-3-1 Unpacking

1 Document feeder 2 Installation guide 3 Bottom pad 4 Outer case 5 Upper pad 6 Eject pad 7 Plastic sheet (1300 × 1300)

8 Plastic bag 9 Plastic bag (200 × 200) 0 Bar code labels ! Front A pad @ Front B pad # Rear A pad $ Rear B pad

1-3-1

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

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Yes

Enter “10871087” using

the numeric keys.

Enter the maintenance item

number using the cursor up/down keys

or numeric keys.

Press the start key.

The selected maintenance item is run.

Press the stop/clear key.

Repeat the same

maintenance item?

Maintenance mode is entered.

The maintenance item is selected.

Yes

Run another maintenance

item?

Enter “001” using the cursor

up/down keys or numeric keys

and press the start key.

End

Maintenance mode is exited.

1-4-1

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(2) Maintenance mode item list

Section

DF U068 Adjusting the scanning position for originals from the DF 0

Item

No. setting*

U070 Adjusting the DF magnification 0

U071 Adjusting the DF scanning timing

• DF leading edge registration 8 (black and

• DF trailing edge registration 0

U072 Adjusting the DF center line 0

U074 Adjusting the DF input light luminosity (black and white copiers only) 1

U203 Operating DF separately —

U243 Checking the operation of the DF motors, solenoids and clutch —

U244 Checking the DF switches —

U263 Setting the paper ejection when copying from the DF (color copiers only)

U404 Adjusting margins for scanning an original from the DF —

Maintenance item contents

Initial

white copiers)

0 (color copiers)

TRAY (NORMAL)

* Initial setting for executing maintenance item U020

1-4-2

(3) Contents of maintenance mode items

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Maintenance

item No.

U068 Adjusting the scanning position for originals from the DF

Description

Adjusts the position for scanning originals from the DF.

Purpose

Used when there is a regular error between the leading edges of the original and the copy image.

Method

Press the start key. The screen for executing is displayed.

Setting

1. Change the setting using the cursor up/down keys (in the case of black and white copiers). Change the setting using the cursor left/right keys (in the case of color copiers).

Description Setting range Initial setting Change in value per step

Scanning position –2 to +3 0 0.254 mm (in the case of

–9 to +9 0 0.169 mm (in the case of

Increasing the setting moves the image backward, and decreasing it moves the image forward.

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

Completion

Press the stop/clear key. The screen for selecting a maintenance item No. is displayed.

U070 Adjusting the DF magnification

Adjustment

See pages 1-6-8.

U071 Adjusting the DF scanning timing

Adjustment

See page 1-6-10.

U072 Adjusting the DF center line

Adjustment

See page 1-6-9.

U074 Adjusting the DF input light luminosity (black and white copiers only)

Description

Adjusts the luminosity of the exposure lamp for scanning originals from the DF.

Purpose

Used if the exposure amount differs significantly between when scanning an original on the contact glass and when scanning an original from the DF (installed to the black and white copiers).

Method

Press the start key. The screen for executing is displayed.

Setting

1. Change the setting using the cursor up/down keys.

Description Setting range Initial setting

DF input light luminosity 0 to 8 1

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

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 screen for selecting a maintenance item No. is displayed.

Description

black and white copiers)

color copiers)

1-4-3

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Maintenance

item No. U203 Operating DF separately

Description

Simulates the original conveying operation separately in the DF.

Purpose

To check the DF.

Method (in the case of black and white copiers)

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

2. Place an original in the DF if running this simulation with paper.

3. Select the item to be operated. The selected item is displayed in reverse.

4. Select the magnification using the cursor up/down keys.

Display Operation Setting range Initial setting

ADF With paper, single-sided original 50 to 200 (%) 100 RADF With paper, double-sided original 50 to 200 (%) 100 ADF (NON-P) Without paper, single-sided original 50 to 200 (%) 100

RADF (NON-P) Without paper, double-sided original 50 to 200 (%) 100

5. Press the start key. The operation starts for the selected magnification.

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

Method (in the case of color copiers)

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

2. Place an original in the DF if running this simulation with paper.

3. Select the item to be operated using the cursor up/down keys. The selected item is displayed in reverse.

Display Operation

ADF With paper, single-sided original RADF With paper, double-sided original ADF (NON-P) Without paper, single-sided original (continuous operation) RADF (NON-P) Without paper, double-sided original (continuous operation)

4. Press the start key. The operation starts.

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

Completion

Press the stop/clear key when the operation stops. The screen for selecting a maintenance item No. is displayed.

Description

(continuous operation)

1-4-4

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Maintenance

item No.

U243 Checking the operation of the DF motors, solenoids and clutch

Description

Turns the motors, solenoids or clutch in the DF on.

Purpose

To check the operation of the DF motors, solenoids and clutch .

Method

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

2. Select the item to be operated (in the case of black and white copiers). Select the item to be operated using the cursor up/down keys (in the case of color copiers). The selected item is displayed in reverse and the operation starts.

Display Motors, solenoids and clutch Operation In operation

F MOT Original feed motor (OFM) In operation C MOT Original paper conveying motor (OCM) In operation FD CL Original feed clutch (OFCL) On for 0.5 s EJ SL Eject feedshift solenoid (EFSSOL) On for 0.5 s RJ SL Switchback feedshift solenoid (SBFSSOL) On for 0.5 s FD SL Original feed solenoid (OFSOL) On and off RP SL Switchback pressure solenoid (SBPSOL) On and off

3. To turn each motor off, press the stop/clear key.

Completion

Press the stop/clear key when operation stops. The screen for selecting a maintenance item No. is displayed.

U244 Checking the DF switches

Description

Displays the status of the respective switches in the DF.

Purpose

To check if respective switches in the DF operate correctly.

Start

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

2. Select the type of switches (SW or VR) to be checked (in the case of black and white copiers). Select the type of switches (SW or VR) to be checked using the cursor up/down keys (in the case of color copiers). The screen for executing each item is displayed.

Display Type of switches

SW On/off switches VR Volume switch

Description

Method for the on/off switches (SW)

1. Turn the respective switches on and off manually to check the status. If the on-status of a switch is detected, the corresponding switch is displayed in reverse.

Display Switches

SET SW Original set switch (OSSW) FEED SW Original feed switch (OFSW) REV SW Original switchback switch (OSBSW) TMG SW DF timing switch (DFTSW) SZ A SW Original size length switch (OSLSW)

2. To return to the screen for selecting an item, press the stop/clear key.

1-4-5

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Maintenance

item No. U244 Method for the volume switch (VR)

1. Move the original insertion guides to check the detection status of the original size width switch. The detected original width is displayed as a numerical value with the decimals omitted.

Numerical

103.936

104.448

139.264

139.776

146.432

146.994

value

000

49.664

50.176

61.440

61.952

····························································

Description

Original width to be detected

/2" × 81/2"

A5R

B5R

Folio/A4R

B4/B5

/2" × 14"/

/2" × 11"

197.120

197.632

197.720

223.232

256

CF (11"

A3/A4

15")

11" 11" 11"

17"/ 15"/ 81/2"

For example, if any value between 105 and 139 is displayed when the original insertion guides are adjusted for A4R paper, it indicates that the original width is detected correctly.

2. To return to the screen for selecting an item, press the stop/clear key.

Completion

Press the stop/clear key at the screen for selecting an item. The screen for selecting a maintenance item No. is displayed.

1-4-6

+ 46 hidden pages