Xerox WorkCentre Pro 412 Service Manual

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WorkCentre Pro 412 Launch Issue

SERVICE

1. Introduction

2. Service Call Procedures

MANUAL

Contents

3. Precautions

4. Specifications

5. Circuit Description

6. Disassembly

7. Maintenance & Troubleshooting

8. Exploded Views and Parts List

9. Electrical Parts List

10. Block Diagram

11. Connection Diagram

12. Schematic Diagrams

Part Number 708P86391

WorkCentre Pro 412. Service Documentation. WorkCentre Pro 412 Service Manual. August 2001. Prepared by: Xerox Europe

Global Knowledge & Language Services Enterprise Centre P. O. Box 17 Bessemer Road Welwyn Garden City Hertfordshire AL7 1HE England.

***Xerox Private Data***

All service documentation is supplied to Xerox external customers for informational purposes only. Xerox service documentation is intended for use by certified, product trained service personnel only. Xerox does not warrant or represent that it will notify or provide to such customer any future change to this documentation. Customer performed service of equipment, or modules, components or parts of such equipment may affect whether Xerox is responsible to fix machine defects under the warranty offered by Xerox with respect to such eq uipment. You should co ns ult the applicable warranty for its te rms re gard ing customer or third-party provided service.

While every care has been taken in the preparation of this manual, no liability will be accepted by Xerox Europe arising out of any inaccuracies or omissions.

Xerox Europe, Xerox ® and all identifying n umb ers us ed in co nne cti on with the Xerox prod uct s mentioned in this publication are trademarks of Xerox Europe.

Printed in the United Kingdom. Adobe and PostScript are trademarks of Adobe Systems Incorporated. PCL, PCL5e, and PCLXL2.0 are trademark s of Hew le tt-Packa rd C om pan y. IBM is a tr ade mark of Inte rna-

tional Business Machines Corporation. Microsoft, Microsoft Windows, Windows3.1, Windows3.11, Windows95/98, WindowsNT, Windows2000, Microsoft Word, MS, and MS-DOS are trademarks of Microsoft Corporation. All other product names are trademarks/trade names of their respective owners.

1. Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

1-1 Organisation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

1-2 Warnings, Cautions and Notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

1-3 Safety Procedures and Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

1-4 Heath and Safety Incident Reporting . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

1-5 Translation of Warnings and Precautions . . . . . . . . . . . . . . . . . . . . . . . 1-6

2. Service Call Procedures. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

SCP 1 Initial Actions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

SCP 2 First Call Actions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

SCP 3 Normal Call Actions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

SCP 4 Fault Analysis. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

SCP 5 Final Actions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

3. Precautions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

4. Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

4-1 Printer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

4-2 Facsimile. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2

4-3 Scanner. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2

4-4 Copier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3

4-5 Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3

4-6 Dimension . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4

4-7 Packaging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4

4-8 Environmental Condition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4

4-9 Machine Life . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4

Table of Contents

5. Circuit Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

5-1 Main PBA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

5-2 Circuit Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2

5-3 Scanner. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-18

5-4 Host Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-22

5-5 Engine Controller. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-26

5-6 OPE PBA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-34

5-7 LIU PBA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-35

5-8 SMPS (Switching Mode Power Supply) Unit. . . . . . . . . . . . . . . . . . . . . 5-36

6. Disassembly and Reassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

6-1 General Precautions on Disassembly. . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

6-2 Rear Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

6-3 Scanner Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2

6-4 ADF Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-5

6-5 OPE Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-6

6-6 Side Cover Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-7

6-7 Fuser Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-9

6-8 Exit Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-10

6-9 Cover Paper Exit Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-11

6-10 Drive Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-12

6-11 SMPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-13

6-12 LSU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-13

6-13 Main Frame Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-14

6-14 Cover Exit Rear. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-14

6-15 MP Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-15

6-16 Feed Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-16

6-17 Pick Up Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-16

6-18 Main PBA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-17

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August 2001

TOC-1

Table of Contents

7. Maintenance & Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1

7-1 Preventative Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1

7-2 Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1

7-3 Scanner. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-9

7-4 FAX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-12

7-5 Print Quality. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-13

7-6 Malfunction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-30

8. Exploded View & Parts List. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1

8-1. Main Exploded View & Parts List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1

8-2. Platen Ass’y Exploded View & Parts List . . . . . . . . . . . . . . . . . . . . . . . 8-4

8-3. ADF ASS’Y Exploded View & Parts List. . . . . . . . . . . . . . . . . . . . . . . . 8-6

8-4. Side Cover Ass’y Exploded View & Parts List . . . . . . . . . . . . . . . . . . . 8-10

8-5. Cassette Ass’y Exploded View & Parts List . . . . . . . . . . . . . . . . . . . . . 8-14

8-6. Exit Ass’y Exploded View & Parts List . . . . . . . . . . . . . . . . . . . . . . . . . 8-16

8-7. Feeder Ass’y Exploded View & Parts List . . . . . . . . . . . . . . . . . . . . . . 8-18

8-8. MP Ass’y Exploded View & Parts List . . . . . . . . . . . . . . . . . . . . . . . . . 8-20

8-9. Base Frame Exploded View & Parts List . . . . . . . . . . . . . . . . . . . . . . . 8-22

8-10. Pick- up Ass’y Exploded View & Parts List . . . . . . . . . . . . . . . . . . . . . 8-24

8-11. Drive Ass’y Exploded View & Parts List. . . . . . . . . . . . . . . . . . . . . . . 8-26

8-12. Main Frame Ass’y Exploded View & Parts List . . . . . . . . . . . . . . . . . 8-28

8-13. FuserA ss’y Exploded View & Parts List . . . . . . . . . . . . . . . . . . . . . . 8-30

9. Electrical Parts Lists. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-1

9-1 Main PBA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-1

10. Block Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-1

11. Connection Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-1

12. Schematic Diagrams. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-1

12-1 Main Circuit Diagram (1 of 14) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-1

12-2 Main Circuit Diagram (2 of 14) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-2

12-3 Main Circuit Diagram (3 of 14) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-3

12-4 Main Circuit Diagram (4 of 14) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-4

12-5 Main Circuit Diagram (5 of 14) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-5

12-6 Main Circuit Diagram (6 of 14) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-6

12-7 Main Circuit Diagram (7 of 14) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-7

12-8 Main Circuit Diagram (8 of 14) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-8

12-9 Main Circuit diagram (9 of 14). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-9

12-10 Main Circuit Diagram (10 of 14) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-10

12-11 Main Circuit Diagram (11 of 14) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-11

12-12 Main Circuit Diagram (12 of 14) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-12

12-13 Main Circuit Diagram (13 of 14) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-13

12-14 Main Circuit Diagram (14 of 14) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-14

12-15 LIU Circuit Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-15

12-16 OPE Circuit Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-16

12-17 HVPS Circuit Diagram (1 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-17

12-18 HVPS Circuit Diagram (2 of 2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-18

12-19 SMPS (110) Circuit Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-19

12-20 SMPS (220) Circuit Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-20

12-21 ADF Circuit Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-21

12-22 Flat Circuit Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-22

12-23 PTL Circuit Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-23

12-24 Sensor Circuit Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-24

12-25 Toner RX Circuit Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-25

12-26 Toner TX Circuit Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-26

WorkCentre Pro 412 Launch Issue

August 2001

TOC-2

Introduction

1. Introduction

This service manual is part of a multinational service documentation system, but is not structured in the standard Xerox service manual format.

1-1 Organisation

Section 1 Introduction

This section describes the contents of the service manual, describes the Heath & Safety Incident Reporting and gives translations of all warnings within the service manual in French, Italian, German and Spanish languages.

Section 2 Service Call Procedures

This section is used to start and complete a service call. This section will either direct you to the Maintenance and Troubleshooting section, or identify a faulty component or sub-assembly.

Section 3 Precautions

This section contains ESD precautions.

Section 4 Specifications

This section contains the specifications for the various modules of the machine.

Section 5 Circuit Description

This section describes the control system of the machine.

Section 6 Disassembly and Reassembly

This section gives instructions for dismantling and assembling the machine.

Section 7 Maintenance & Troubleshooting

This section contains instructions for preventative maintenance and diagnosis of machine fault

Section 8 Exploded Views and Parts Lists

This section shows all parts of the machine in exploded views with lists of spared parts.

Section 9 Electrical Parts Lists.

This section lists all of the spared electrical components.

Section 10 Block Diagram

This section contains a block diagram of the machine functions.

Section 11 Connection Diagram

This section contains an electrical connection diagram for the whole machine.

Section 12 Schematic Diagrams

This section contains the schematic diagrams for the machine.

1-2 Warnings, Cautions and Notes

Translated versions of all warnings are in Translation of Warnings at the end of this section.

WorkCentre Pro 412 August 2001 1-1 Launch Issue

Introduction

WARNING

A warning is used whenever an operating or maintenanc e procedure, prac tice, condi tion or statement, if not strictly observed, could result in personal injury.

CAUTION

A caution is used whenever an operation or maintenance procedure, practice, condition or statement, if not strictly observed, could result in damage to the equipment

NOTE: A note is used where it is essential to highlight a procedure, practice, condition or statement

1-3 Safety Procedures and Information

The Xerox WorkCentre Pro 412 product and supplies are manufactured, tested and certified to strict safety regulations, electromagnetic regulations and established environmental standards.

WARNING

Any unauthorised alteration, which may include the addition of new fun ction s, th e c onne ction of exte rnal devices or the use of components not specified by Xerox may impact the products certification, safety performance or compliance with legislation.

Warning markings

All warning instructions marked on or supplied with the product should be followed.

WARNING

A warning is used whenever an operating, service or maintenance procedure, practice, condition or statement, if not strictly observed could result in personal injury

WARNING

Alerts to areas of the product where there are heated surfaces which must be avoided during service or maintenance operations.

WARNING

The following are general warning statements which apply in various service or maintenance situations.

WorkCentre Pro 412 August 2001 1-2 Launch Issue

Introduction

General Safety Warning

Switch off the po w er to th e m achin e an d disconnect the power cord fro m t he o utl et w h ile pe rform ing tas ks th at do not need the electricity on. Contact with electricity can cause death or injury.

Power Supply

This product must be operated from the type of power supply indicated on the product’s data plate label. This product must be connected to a protective earth circuit.

Safe Working

Throughout this pro cedure prior to working on a ny electrical circui t or any m ec han ic al driv e com po nen t di sc onnect all electrical power to the product. The disconnect device is the power cord. Remove the plug from the power outlet.

Ventilation

This product should not be placed in a built-in installation unless proper ventilation is provided.

Operator Accessible Areas

This product has been designed to restrict operator access to safe areas only. Operator access to hazardous areas is restricted with covers or guards, which require a tool to remove. Ensure that these covers or guards are correctly replaced after every service or maintenance task.

Maintenance/Service

Do not to carry out any maintenance or service on the product, which is not described this service documentation.

Cleaning

Before cleaning this product, unplug the product from the power outlet. Always use materials specifically designated for this product, the use of other materials may result in poor performance and may create a hazardous situation. Do not use aerosol cleaners, they may become flammable under certain circumstances.

Precautions

1. Be sure that all built-in protective devices are in place. Restore any missing protective covers.

2. When re-installing chassis and assemblies, be sure to restore all protective devices, including control knobs and compartment covers.

3. Design Alteration Warning: Never alter or add to the mechanical or electrical design of this equipment, such as auxiliary c onn ect ors, etc. Such alterations a nd m odi fic ati ons will void the manufacturer’s warranty.

4. Components, parts, and wiring that appear to have overheated or are otherwise damaged should be replaced with Xerox spare parts. Always determine the cause of damage or overheating, and correct any potential hazards.

5. Observe the original harness routing, especially near sharp edges, AC, and high voltage power supplies. Always inspect for pinched, out-of-place, or frayed wiring. Do not change the spacing between components and the printed circuit board.

6. Product Safety Notice: Some electrical and mechanical parts have special safety-related characteristics which might not be obvious from visual inspection. These safety features and the protection they provide could be lost if a replacement component differs from the original. This holds true, even though the replacement may be rated for higher voltage, wattage, etc.

Lithium battery precautions

The Main PWBA is provided with a lithium Cell designated BAT1. Observe the following precautions:

•There could be a danger of explosion if the battery is subject to forced discharge or reverse voltage.

•The battery must only be replaced with the same type.

•The battery should only be replaced at a service centre not at a customer location

•The replacement battery must be the same type and manufacturer as the original.

•Lithium batteries contain substances which are subject to control and should not be opened, crushed or

burned during disposal.

WorkCentre Pro 412 August 2001 1-3 Launch Issue

Introduction

Laser Safety

WARNING

Invisible laser radiation. avoid exposure to beam. Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure. This product contains laser warning labels. These labels are intended for use by Service and Maintenance Representatives an d are placed on the top surfa ce of the La ser U ni t. D o not a ttemp t to o pen the laser unit. There are no serviceable components or areas inside the unit. Operation of the laser unit with machine or laser covers removed could cause e ye damage if the laser beam is viewed directly.

Electrostatic Damage Caution

The following is an example of the terminology and symbols used in this manual for an electrostatic damage caution:

Caution

Certain components in this product are susceptible to damage from electrostatic discharge. Observe all ESD procedures to avoid component damage.

1-4 Heath and Safety Incident Reporting

I. Summary

This standard defines requirements for notification of health and safety incidents involving Xerox products (equipment and materials) at customer locations.

II. Scope

Xerox Corporation and subsidiaries worldwide.

WorkCentre Pro 412 August 2001 1-4 Launch Issue

Introduction

III. Objective

To enable promp t reso luti on of health and safety incidents invo lvi ng Xerox products and to ensure Xerox regulatory compliance.

IV. Definitions

Incident: An event or condition occurring in a customer account that has resulted in injury, illness or property damage. Examples of incidents incl ude mach ine fires, sm oke generati on, physi cal inju ry to an oper ator or service representative. Alleged events and product conditions are included in this definition.

V. Requirements

Initial Report:

1. Xerox organisations shall establish a process for individuals to report product incidents to EH&S within 24 hours of becoming aware of the event.

2. The information to be provided at the time of reporting is contained in Appendix A (Health and Safety Incident Report involving a Xerox product).

3. The initial notification may be made by any of the following methods:

• For incidents in North America and Developing Markets West (Brazil, Mexico, Latin American North

and Latin American South):

Phone* EH&S at: 1-800-828-6571.

• Electronic mail EH&S at: Doris.Bush@usa.xerox.com.

• Fax EH&S at: 1-716-422-7734 [intelnet 8*222 7734].

• For incident s i n Euro pe and Developing Mar ket s Eas t (M idd le East , Afric a, India, China and Hong

Kong):

• Phone* EH&S at: +44 (0) 1707 35343.

• Electronic mail EH&S at: Elaine.Grange@GBR.xerox.com.

• Fax EH&S at: +44 (0) 1707 353914 [intelnet 8*668 3914].

*Initial notification m ade by phon e must be fol lowe d within 24 hou rs by a com pleted in cident report and sen t to the indicated electronic mail address or fax number.

NOTE: If sending a fax, please also send the original via internal mail.

Responsibilities for resolution:

1. Business Groups/Product Design Teams responsible for the product involved in the incident shall: a. Manage field bulletins, customer correspondence, product recalls, safety retrofits. b. Fund all field retrofits.

2. Field Service Operations shall: a. Preserve the Xerox product involved and the scene of the incident inclusive of any associated equipment located in the vicinity of the incident. b. Return any affe cte d equip ment/par t(s) to th e loca tion de signat ed by EH&S a nd/or the Bus iness D ivisi on. c. Implement all safety retrofits.

3. EH&S shall: a. Manage and report all incident investigation activities. b. Review and approve proposed product corrective actions and retrofits, if necessary. c. Manage all communications and correspondence with government agencies. d. Define actions to correct confirmed incidents.

VI. Appendices

The Health and Safety Incid ent Report invol ving a Xerox Pro duct (For m # EH&S-70 0) is a vailable at the end of this Service Manual.

WorkCentre Pro 412 August 2001 1-5 Launch Issue

Introduction

1-5 Translation of Warnings and Precautions

WARNING

A warning is used whenever an operating or maintenanc e procedure, prac tice, condi tion or statement, if not strictly observed, could result in personal injury.

AVERTISSEMENT

Un avertissement est utilisé chaq ue fois qu'une procédure d'utilisation ou de ma inten ance peu t provo-

quer des blessures si elle n'est pas strictement respectée.

AVVERTENZA

Un’ avvertenza viene utilizzata per segnalare pro cedu re, operazion i, condizi oni o istruzion i operative e di manutenzione, la cui mancata osservanza può causare infortuni.

VORSICHT

Warnhinweise dieser Art gelten für Anweisungen und Situationen, bei deren Nichtbeachtung bzw. Auftreten Verletzungsgefahr besteht.

AVISO

Los avisos se utilizan cuan do un procedimiento, ejerci cio, condic ión o declara ción de funcionam iento o mantenimiento puede producir lesiones personales, si no se sigue estrictamente.

WARNING

AVERTISSEMENT

Toute modification non autorisée, qu'il s'agisse de l'ajout de nouvelles fonctions, de la connexion de dispositifs externes ou de l'utilisation de composants non recommandés par Xerox, peut entraîner l'annulation de la garantie.

AVVERTENZA

Qualunque modifica che implich i l’ aggiungi mento di nuove funzioni , il collegamento ad un dispositivo esterno o l’ utilizzo di componenti non autorizzati da Xerox può invalidare la certificazione e le dichiarazioni di conformità del prodotto, nonché compromettere la sicurezza operativa di questo.

VORSICHT

Warnhinweise dieser Art gelten für Anweisungen und Situationen, bei deren Nichtbeachtung bzw. Auftreten Verletzungsgefahr besteht.

AVISO

Cualquier modificación no autorizada, que puede incluir la adición de nuevas funciones, la conexión de dispositivos externos o el uso de componentes no especificados por Xerox, puede afectar a la certificación del producto, el funcionamiento seguro o el cumplimiento de la legislación.

WARNING

A warning is used whenever an operating, service or maintenance procedure, practice, condition or statement, if not strictly observed could result in personal injury

AVERTISSEMENT

WorkCentre Pro 412 August 2001 1-6 Launch Issue

Introduction

Un avertissement est utilisé à chaque fois q u'une procédure de maintenance ou qu'une manipulation présente un risque de blessure si elle n'a pas été strictement observée.

AVVERTENZA

Un’ avvertenza viene utilizzata per segnalare pro cedu re, operazion i, condizi oni o istruzion i operative e di manutenzione, la cui mancata osservanza può causare infortuni.

VORSICHT

Warnhinweise dieser Art gelten für Anweisungen und Situationen, bei deren Nichtbeachtung bzw. Auftreten Verletzungsgefahr besteht.

AVISO

Los avisos se utilizan cuando un procedimiento, eje rcicio, condición o declara ción de funcionamien to, servicio o mantenimiento puede producir lesiones personales, si no se sigue estrictamente.

WARNING

Alerts to areas of the product where there are heated surfaces which must be avoided during service or maintenance operations.

AVERTISSEMENT

Prévient des risques encourus lors d'une intervent ion dans des zones chaudes qui peuve nt provoquer des blessures.

AVVERTENZA

Evitare le superfici calde del prodotto, indicate da etichette di avvertenza, durante le operazioni di manutenzione o di assistenza.

VORSICHT

Weist auf heiße Gerätebereiche hin, die bei der Wartung und Pflege nicht angefasst werden dürfen.

AVISO

Llama la at ención sobre áreas del producto donde hay superficies calientes que deben evitarse durante las tareas de servicio o mantenimiento.

WARNING

The following are general warning statements which apply in various service or maintenance situations.

General safety warning

Power Supply

This product must be operated from the type of power supply indicated on the product’s data plate label. This product must be connected to a protective earth circuit.

Safe Working

Ventilation

This product should not be placed in a built-in installation unless proper ventilation is provided.

WorkCentre Pro 412 August 2001 1-7 Launch Issue

Introduction

Operator Accessible Areas

Maintenance/Service

Do not to carry out any maintenance or service on the product, which is not described this service documentation.

Cleaning

AVERTISSEMENT

Cette mention indique des informations relatives à différentes situations de maintenance.

Sécurité générale - Avertissement

Mettre la machine hors tension et débrancher le cordon d'alimentation de la prise murale lors d'interventions qui ne nécessitent pas que l'alimentation soit maintenue. Un contact avec une zone sous tension peut mettre en danger la sécurité des personnes.

Alimentation

Ce produit doit être utilisé avec l'alimentation indiqué sur la plaque de la machine. Ce produit doit être connecté à un circuit avec mise à la terre.

Sécurité

Pendant toute cette procédure d'intervention dans de s ci rcuits électriques ou des en traîn em ents mécaniques, débranchez la machine. Le système de déconnexion est le cordon d'alimentation. Retirer le connecteur de la prise murale.

Aération

Cet équipement ne doit pas être encastré, sans une ventilation appropriée.

Zones accessibles aux utilisateurs

Ce produit a été conçu de façon à ce que les zones accessibles par les utilisateurs soient sans danger. Les zones qui peuvent être dangereuses sont protégées par des panneaux ou des sécurités qui nécessitent l'utilisation d'un outil pour être retirer. Veiller à ce que ces pann eau x et sécurités sont correctement remis en place après toute intervention technique ou de maintenance.

Maintenance

N'effectuez aucune procédure de maintenance non décrite dans la documentation.

Nettoyage

Avant toute procédure d e nettoya ge, débranchez l' équipemen t de la prise m urale. Util isez toujours l es produ its d'entretien conçus spécifiquement pour l'appareil. L'utilisation d'autres produits risque de nuire au bon fonctionnement de l'appareil et peut s'avérer dangereuse. N'utilisez jamais d'aérosols, ils p euvent s'enflammer sous certaines circonstances.

AVVERTENZA

Le seguenti avvertenze sono applicabili a svariate situationi di manutenzione o di assistenza.

WorkCentre Pro 412 August 2001 1-8 Launch Issue

Introduction

Avvertenza sicurezza generale

Spegnere l’ apparecchio e scollegare il cavo di alimentazione dalla presa durante l’ esecu zio ne di opera zi oni che non richiedono l’ utilizzo di elettricità. Scosse elettriche accidentali posso no caus are lesio ni pers onali o morte.

Alimentazione

Utilizzare il prodotto esclusivamente con il tipo di energia indicato e collegarlo a un circuito protettivo con messa a terra.

Sicurezza elettrica

Accertarsi che il prod otto non ri ceva elet tricità dura nte le ope razioni di intervent o sui cir cuiti elet trici o su lle parti meccaniche. Il dispositivo di disattivazione del prodotto è costituito dal cavo di alimentazione, il quale deve essere scollegato dalla presa.

Ventilazione

Non installare l’ apparecchio in un alloggiamento a incasso, a meno che non sia garantita una ventilazione adeguata.

Aree accessibili per l’ operatore

Questo prodotto è stato progettato in modo da impedire l’ accesso dell’ operatore ad aree non sicure; queste sono protette da coperture o schermi che richiedono l’ utilizzo di attrezzi per la rimozione. Accertarsi che le coperture o gli scherm i siano reinseriti in seguito a qualunque op eraz ion e d i m anu ten zio ne o di assistenza del prodotto.

Manutenzione e assistenza

Non effettuare alcuna operazione di manutenzione o di assistenza non descritta nella documentazione del prodotto.

Pulizia del prodotto

Prima di eseguire operazioni di pulizia, scollegare il cavo di alimentazione dalla presa a muro. Utilizzare sempre prodotti specifici per questo apparecchio: l’ utilizzo di prodotti diversi da quelli consigliati può comportare un deterioramento delle prestazioni e causare situazioni di pericolo. Non utilizzare detergenti aerosol, che in alcune circostanze possono risultare infiammabili.

VORSICHT

Die folgenden Warnhinweise gelten für diverse Wartungs- und Pflegearbeiten.

Allgemeine Sicherheitshinweise

Bei Arbeiten, bei denen kein Strom erforderlich ist, das Gerät ausschalten und den Netzstecker abziehen.

Netzanschluss

Das Gerät muss an eine einwandfrei funkt ionierende Steckdose an geschlos sen sein. Das Gerät muss geerde t sein.

Arbeitssicherheit

Vor jeg lichen Arbei ten an einem Stro mkreis ode r einem mech anischen Antrieb ist immer de r Netzanschl uss zu trennen. Das Gerät wird durch Abziehen des Netzsteckers abgeschaltet.

Belüftung

Das Gerät darf nur dann in einer Einbau pos iti on installiert werden, we nn f ür au sre ich end e -Lüftung gesorgt ist.

WorkCentre Pro 412 August 2001 1-9 Launch Issue

Introduction

Gefahrenbereiche im Gerät

Der Zugang zum Gerät ist durch Abdeckungen und mechanische Verriegelungen auf sichere Bereiche eingegrenzt. Gefahrenbereiche sind mit Abdeckungen versehen, die nur mit Werkzeug entfernt werden kön- nen. Diese Abdeckungen müssen nach Reparaturarbeiten durch den Kundendienst wieder ordnungsgemäß eingebaut werden.

Wartung/Kundendienst

Keine Wartungsarbeiten, die nicht in der Dokumentation beschrieben sind, ausführen.

Reinigung

Vor der R einigung de s Geräts den Netzstecke r abziehen. Nur di e speziell für das Gerät em pfohlenen Teile und Verbrauchsmaterialien benutzen, da im anderen Fall schlechte Laufleistung und Sicherheitsrisiken möglich sind. Keine Reinigungssprays verwenden, da diese sich ggf. entzünden können.

AVISO

Los siguientes son declaraciones generales de aviso aplicables en varias situaciones de servicio o mantenimiento.

Aviso de seguridad general

Apague la máquina y de se nchufe el cable de alimentación de la tom a d e c orri ente pa ra r eal izar tareas que no necesiten que se tenga corriente eléctrica en la máquina. El contacto con la corriente eléctrica puede causar lesiones e incluso la muerte.

Fuente de alimentación eléctrica

Este producto debe utilizarse con el tipo de alimentación eléctrica que se indique en la etiqueta o placa de datos técnicos del producto. Este producto debe conectarse a un circuito con puesta a tierra de protección.

Seguridad en el trabajo

Durante este procedimiento antes de trabajar en algún circuito eléctrico o componente impulsor mecánico desconecte el producto de la corriente eléctrica. El dispositivo de desconexión es el cable de alimentación. Desconecte el enchufe de la toma de corriente.

Ventilación

Este producto no debe colocarse en un lugar empotrado al menos que se tenga la ventilación apropiada.

Áreas accesibles por el operador

Este producto está diseñado para limitar el acceso del operador solamente a áreas seguras. El acceso del operador a áreas de peligro se li mi ta m edi ante cub ierta s y pr otec tore s qu e para quit arlo s es nec es ario utilizar alguna her ramienta. Asegúrese de volver a colocar las cubiertas y los protectores correctamente después de cada tarea de servicio o mantenimiento.

Mantenimiento/Servicio

No realice ninguna operación de mantenimiento o servicio en este producto si no está descrita en esta documentación de servicio.

Limpieza

Antes de limpiar este producto, desenchúfelo de la toma de corriente. Utilice siempre materiales designados específicamente para este producto ; el us o d e ot ros materiales puede pro duc ir u n fu ncionamiento defectuos o o crear situaciones de peligro. No utilice limpiadores de aeros ol; en cie r t as circ uns t a nci as puede n lle gar a ser inflamables.

WorkCentre Pro 412 August 2001 1-10 Launch Issue

Introduction

Precautions

1. Be sure that all built-in protective devices are in place. Restore any missing protective covers.

2. When re-installing chassis and assemblies, be sure to restore all protective devices, including control knobs and compartment covers.

7. Components critical for safety are indicated in the parts list with symbols shown below. Use only replacement components that have the same ratings, especially for flame resistance and dielectric specifications. A replacement part that does not have the same safety characteristics as the original may create shock, fire, or other safety hazards.

Lithium battery precautions

The Main PWBA is provided with a lithium Cell designated BAT1. Observe the following precautions: There could be a danger of explosion if the battery is subject to forced discharge or reverse voltage. The battery must only be replaced with the same type. The battery should only be replaced at a service centre not at a customer location The replacement battery must be the same type and manufacturer as the original. Lithium batteries contain substances which are subject to control and should not be opened, crushed or burned during disposal.

Précautions

1. Vérifier que tous les dispositifs de protection intégrés sont en place. Replacer les panneaux de protection manquants.

2. Lors de la réinstallation du châssis et des différentes pièces, veiller à bien replacer tous les dispositifs de protection, y compris les boutons de contrôle et les couvercles de compartiment.

3. Avertissemen t rela tif a ux m odi fic ati ons de c onc ep tion : Ne jam ai s m odi fier l a st ructure mécanique ou élec- trique de cet équipement (en ajoutant, par exemple, des connecteurs auxiliaires, etc.). De telles transformations et modifications annuleraient la garantie du constructeur.

4. Tout compos ant, pièce o u câblage ayant été exposé à une surchauffe ou endommagé d’une quelconque autre façon doit être remplacé par une pièce Xerox. Toujours déterminer la cause du dommage ou de la surchauffe et élim in er les risq ue pote ntie ls .

5. Examin er le câblage initial, aux abords notamment des arêtes coupantes, de l’alimentation en courant alternatif et haute tension et toujours s’assurer qu’aucun fil n’est coincé, déplacé ou endommagé. Ne pas modifier l’espacement des composants et de la carte de circuit imprimé.

6. Sécurité produit : Certaines pièces mécaniques et électriques présentent des caractéristiques de sécurité particulières qui peuvent ne pas être évidentes à l’oeil nu. Ces caractéristiques de sécurité et la protection qu’elles assurent risquent de disparaître si un composant de rechange différent du composant d’origine est utilis é. Ceci est vrai même dans le cas où la pièce de rechange serait destinée à un voltage, à un ampérage, etc., supérieur.

7. Les composant s es sen tiels pour la sécurité sont indiqués dans la lis t e de s pièces par les symbol es décrits ci-dessous. Utiliser uniquement des composants de rechange présentant les mêmes caractéristiques assignées, surtout en matière de tenue à la flamme et de spécifications diélectriques. Une pièce de rechange ne présentant pas les mêmes caractéristiques de sécurité que la pièce d’origine peut provoquer des accidents : électrocution, incendie, et autres dangers pour la sécurité.

WorkCentre Pro 412 August 2001 1-11 Launch Issue

Introduction

Précautions relatives aux piles au Lithium

La carte PWBA est équipée d'une pile au lithium identifiée BAT 1. Observez les précauti ons suivantes : Il existe un risque d'explosion si la pile est l'objet d'une alimentation forcée ou d'un voltage inversé. Une pile ne doit être remp lac ée que par une de même type. La pile ne doit être remplacée que dans un Centre de maintenance et non chez le client. Les piles de remplacement doive nt être de même type et fabrication que celles d'origine. Les piles au Lithium contiennent des substances qui nécessitent des contrôles et ne doivent pas être ouvertes, écrasées ou brûlées.

Precauzioni

1. Accertari che non manchino dispositivi di protezione. Rimettere in sede eventuali coperture di protezione mancanti.

2. Duran te l’installazione di coperture e gruppi, accertarsi che siano presenti tutti i dispositivi di protezione, comprese manopole di controllo e coperture nelle diverse aree.

3. Avvertenza: no n modi ficare la stru ttura me ccani ca o e lettric a dell a macc hina, quali connet tori aus iliari , ecc. Eventuali modifiche o alterazioni renderanno nullo il certificato di garanzia del produttore.

4. Componenti, parti e cab laggio che app aiono s urrisca ldati o d annegg iati va nno sos tituiti da parti di ricamb io Xerox. Stabilire la causa del problema e intervenire in modo adeguato per evitare che si ripresenti.

5. Mantenere il percorso originale del cablaggio, in particolare in prossimità di bordi, per CA e alimentazione elettrica ad alta tensione. Verificare che il cablaggio non sia strozzato, fuori sede o consumato. Non alterare lo spazio tra i componenti e la scheda del circuito stampato.

6. Avviso sulla sicurezza del prodotto: alcuni componenti elettrici e meccanici possiedono delle funzioni di sicurezza non sempre ovvie durante l’ispezione visiva. Queste funzioni possono non essere più attive se un componente viene sostituito con uno diverso dall’originale. Questo vale anche se le parti di ricambio hanno specifiche più elevate, ad esempio, di alta tensione, potenza nominale, ecc.

7. I componenti per la sicurezza più importanti sono riportati nell’elenco delle parti di ricambio con i simboli illustrati qui di seguito. Utilizzare solo componenti con gli stessi valori, in particolare per quanto riguarda i valori di resistenza al calore e le specifiche dielettriche. Una parte di ricambio con funzioni di sicurezza diverse dalla parte originale può causare condizioni di pericolo quali scosse elettriche e incendi.

Precauzioni della batteria al litio

La PWBA (scheda a circuito stampato) principale è fornita di una batteria al litio (BAT1). Osservare le precauzioni riportate di seguito. La batteria può esplodere se soggetta ad una forzata discarica o tensione inversa. Sostituire la batteria ESCLUSIVAMENTE con una dello stesso tipo. Sostituire la batteria pr esso un centro di assi stenz a tecnic a e accert arsi che la batteria di sostit uzione sia dello stesso tipo e marca dell’ originale. Le batterie al litio contengono sostanze soggette a controllo e non devono essere aperte, frantumate o bruciate durante l’ eliminazione.

Vorsichtsmaßnahmen

1. Darauf achten, dass alle Sicherheitsvorrichtungen vorhanden sind. Evtl. fehlende Sicherheitsabdeckungen einbauen.

2. Beim Zusammenbau von Komponenten und Gehäuse alle Sicherheitsvorrichtungen sowie Steuerknöpfe und Abdeckungen installieren.

3. Bauartänderungen: keinerlei Änderung an der mechanischen oder elektrischen Bauart des Geräts, z. B. durch Installation von Zusatzanschlüssen, durchführen. Bei solchen Änderungen wird die Garantie des Herstellers ungültig.

4. Komponenten oder Kabel/Drähte, die überhitzt oder anderweitig beschädigt sind, müss en durc h Ersatz teile von Xerox ersetzt werden. Die Ursache einer Überhitzung mus s immer ges uc ht und ents prec hen de Gefahrenquellen beseitigt werden.

WorkCentre Pro 412 August 2001 1-12 Launch Issue

Introduction

5. Kabelbaum, Netzkabel und Hochspannungskabel besonders in der Nähe scharfer Kanten auf Schäden und Positionsänderungen überprüfen. Der Absta nd zwisc hen Kompon enten und der Leite rpla tte darf ni cht geändert werden.

6. Gerätesicherheit: Einige elektrische und mechanische Komponenten verfügen über bestimmte, nicht sichtbare, Sicherheitsmerkm ale. W erde n Kompo nenten d urch solc he ande rer Bauart e rsetzt, bieten die se ggf. nicht denselben Gefahrenschutz wie die Originalkomponenten. Das gilt auch dann, wenn die Ersatzteile für eine höhere Spannung ausgelegt sind, o. Ä.

7. Für die Betriebssicherheit wichtige Komponenten sind in der Teileliste mit dem unten gezeigten Symbol gekennzeichnet. Es dürfen nur Ersatzteile mit der gleichen Sicherheitsauslegung, insbesondere mit den gleichen dielektrischen und flammhemmenden Spezifikationen, verwendet werden. Bei Einbau einer Komponente mit ei ner and eren Sic herhei tsausl egung als d er des O riginal s bes tehen St romsc hlag-/Bran dund weitere Sicherheitsrisiken.

Lithiumbatterie

Das Haupt-PWBA enthält eine Lithiumbatterie (BAT1). Folgende Hinweise beachten: Bei Rückspannung oder erzwungener Entladung besteht Explosionsgefahr. Die Batterie darf nur durch eine Batterie gleichen Typs ersetzt werden. Die Batterie darf nur im Kundendienstzentrum, nicht aber im Haus des Kunden, ersetzt werden. Die Ersatzbatterie muss vom gleichen Typ und Hersteller sein, wie das Original. Lithiumbatterien müssen den vorschriftmäßig entsorgt werden.

Precauciones

1. Asegúrese de que todos los dispositivos de protección incorporados están en su sitio. Restaure las cubi- ertas protectoras que falten.

2. Al reinstalar el chasis y los ensamblajes, asegúrese de restaurar todos los dispositivos de protección, incluyendo mandos de control y cubiertas de compartimientos.

3. Aviso de alteración del diseño: Nunca altere o agregue nada al diseño mecánico o eléctrico de este equipo, como conectores auxiliares, etc. Tales alteraciones y modificaciones anularán la garantía del fabricante.

4. Los componentes, piezas y cables que parezcan haber sufrido sobrecalentamiento o daños de otro tipo deben reemplazarse por piezas de repuesto de Xerox. Siempre determine la causa del daño o sobrecalentamiento y corrija cualquier tipo de riesgo potencial.

5. Observe la ruta original de los mazos de cables, especialmente cerca de bordes afilados, CA y alimentaciones eléctricas de alto voltaje. Siempre inspeccione si los cables están pellizcados, fuera de lugar o pelados. No cambie el espacio entre los componentes y la tarjeta de circuito impreso.

6. Aviso de seguridad del producto: Algunas piezas eléctricas y mecánicas tienen características especiales relacionadas con la seg uridad que pueden pasar desape rci bid as a una in sp ecc ión visual. Estas funciones de seguri dad y la prot ecci ón que proporcionan podría perderse si un componente de repuesto difiere del original. Esto es verdadero, aunque la pieza de repuesto admita un voltaje o vatios más altos, etc.

7. Los componentes críticos para la seguridad se indican en la lista de piezas con símbolos mostrados debajo. Use sólo compo nentes d e repues to que te ngan lo s mism os va lores, s obre todo en cua nto a resi stencia al fuego y es pecifica ciones dieléctricas. Una pieza de r eca mbio q ue no ten ga las mism as cara cter ís- ticas de seguridad que la original puede producir una descarga, fuego u otros riesgos de seguridad.

Precauciones con la batería de litio.

El PWBA principal tiene una batería de litio denominada BAT1. Observe las precauciones siguientes: Podría producirse peligro de explosión si la batería se ve sometida a descarga forzada o tensión inversa. La batería solamente debe cambiarse por otra del mismo tipo. La batería debe cambiarse solamente en un centro de servicio y no donde el cliente. Las baterías de litio contienen substancias sujetas a control y no deben abrirse, aplastarse ni quemarse para deshacerse de ellas.

WorkCentre Pro 412 August 2001 1-13 Launch Issue

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Introduction

WorkCentre Pro 412 August 2001 1-14 Launch Issue

Service Call Procedures

2. Service Call Procedures

SCP 1 Initial Actions

The Service Call Procedures section is used to identify a suspected problem with the machine. Start a service call with Initial Actions and end with SCP 6 Final Actions. Initial Actions are used to gather information of the machine performance.

Procedure

Warning

Switch off the power to the machine and disconnect the power cord from the outlet while performing tasks that do not need the electricity on. Electricity can cause death or injury.

NOTE: Ignore any references in this manual to options not installed on the machine. NOTE: If the machine is equipp ed w i th FAX, do not service or interrupt power u ntil the j obs in th e FAX Queue

are completed, or the FAXs in the queue may be lost.

1. Take note of symptoms, error messages or error codes.

2. Ask the operator to describe or demonstrate the problem.

3. If the problem is the result of incorrect operator action, refer the operator to the user documentation.

4. Make sure that: a. The power cord is connected to the wall outlet and to the machine. b. Documents are not loaded. c. Paper is loaded correctly and all paper trays and covers are closed. d. The telephone line cable is connected correctly between the line socket and the wall jack. e. The telephone line is good. f. Connection cable between the machine and any computer or computer network is correctly connected and in good condition.

5. Check the machine service log book for any previous actions that may be relevant to the call.

6. Either perform SCP 2 First Call Actions or SCP 3 Normal Call Actions.

SCP 2 First Call Actions

First Call Actions are used for the first service call.

Procedure

Perform the following:

1. Check the machine configuration with the customer. Check that all required hardware and software is installed and / or enabled.

2. Check that all the relevant machine settings are correctly entered.

3. If a fault is present, go to SCP 3 Normal Call Actions. If there is no fault present, go to SCP 6 Final Actions.

WorkCentre Pro 412 August 2001 2-1 Launch Issue

Service Call Procedures

SCP 3 Normal Call Actions

Normal Call Actions are used to determine the reason for the service call.

Procedure

NOTE: If an error message appears at any time. Refer directly to the error code tables in 1-1 Error Codes RAP, and perform the procedure.

Perform the Following:

1. Review any defective print or copy samples.

2. If the LCD is completely blank, switch off the machine. Wait 10 seconds. Switch on the machine. If the LCD is still blank, go to 7-6 Malfunction, No Power (LCD or LED).

3. If connected to a network, verify with the customer, that it is permissible to disconnect the machine from the network.

4. Check and record the total number of images made by the machine.

5. Make a note of any parts requiring cleaning or replacement, refer to 7-1 Preventative Maintenance.

6. Go to SCP4 Fault Analysis.

SCP 4 Fault Analysis

Fault Analysis is used to identify a fault.

Procedure

Exercise the machine in all modes until the fault is determined. Perform the following:

• If an error message is displayed, go to 7-2 Diagnostics.

• If an image defect is evident, go to 7-3 Scanner.

• If there are problems in sending or receiving FAXs, go to 7-4 FAX.

• If a print defect is evident, go to 7-5 Print Quality.

• If the machine is malfunctioning, go to 7-6 Malfunction.

• When the fault is corrected, go to SCP 5 Final Actions.

SCP 5 Final Actions

Final Actions are used to evaluate the total operation of the system and to identify the actions required to complete the service call.

Procedure

Complete the following:

• Perform any remaining cleaning or replacement actions, referred to in SCP 3.

• Exercise the machine in all modes, making copies and / or prints from all trays, utilising the ADF and

the document glass.

• If necessary, make a proof copy of a customer document.

• Remove and destroy any copies of test patterns.

• Provide customer training if required.

• If any of the customers selections were changed, return them to the customers preferred settings.

• Complete all administrative tasks.

Ensure the machine and service area are clean before leaving the customer premises.

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Launch Issue

3. Precautions

Follow these ESD precautions to prevent equipment damage.

Precautions

1. Certain semiconductor devices can be easily damaged by static electricity. Such components are commonly called “Electrostatically Sensitive (ES) Devices”, or ESDs. Examples of typical ESDs are: integrated circuits, some field effect transistors, and semiconductor “chip” components.

The techniques outlined below should be followed to help reduc e the incid ence of com ponent damage caused by static electrici ty.

CAUTION

•Be sure no power is applied to the chassis or circuit, and observe all other safety precautions.

2. Before handling a semiconductor component or semiconductor-equi pped a ssembly, drain off any electrostatic charge on your body by using the standard Xerox ESD protection kit, which sho uld be removed for your personal safety reasons prior to applying power to the machine.

3. After removing an electrical assembly equipped with ESDs, place the assembly on the conductive mat of the ESD kit, to prevent electrostatic charge buildup in the vicinity of the assembly.

4. Use only a grounded tip soldering iron to solder or de-solder ESDs. Use only an “anti-static” solder removal device . Some solder removal devices not classified as “anti-static” can generate electrical charges sufficient to damage ESDs.

5. Do not use Freon-propelled chemicals. When sprayed, these can generate electrical charges sufficient to damage ESDs.

6. Do not remove a replacement ESD from its protective packaging until immediately before installing it. Most replacement ESDs are packaged with all leads shorted together by conductive foam, aluminum foil, or a comparable conductive material.

7. Immediately before removing the protective shorting material from the leads o f a replacement ESD, touch the protective mat erial to the ch assis or circuit assembly into which the device will be installed.

8. Maintain continuous elec tric al con tac t between the ESD and the assembly into which it will be installed, until completely plugged or soldered into the circuit.

9. Minimize bodily motions when handling unpacked replacement ESDs. Normal motions, such as the brushing together of clothing fabric and lifting one’s foot from a carpeted floor, can generate static electricity sufficien t to damage an ESD.

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3-1

Precautions

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4. Specifications

4-1 Printer

Printing method Laser scanning unit + electro photography Print speed 12 PPM (Letter size, 5% area coverage) Resolution True 600 X 600 DPI Emulation PCL6 Operation system Windows 95/98/2000/NT 4.0/Win-ME Interface IEEE1284 (Nibble/ECP)

USB (Windows 98/2000 only, without HUB mode) Source of Light Laser diode (LSU) Feed method Cassette type and multi-purpose tray Feed direction FISO (front-in side-out) Paper Size

Specifications

Normal paper: A4,letter,legal,B5,

Executive, A5

Envelope: normal envelope

Length: 149 to 356mm (5.87 to 14 inches)

Width: 100 to 216mm (3.94 to 8.5 inches)

Weight: For MPF, 60 to 90gsm (16 to 24 bond/xerographic)

For cassette, 60-163 gsm (16 to 40 bond/xerographic) Paper capacity MPF: 100 sheets (based on 75gsm, 20 lb.)

Cassette: 550 sheet (based on 75gsm, 20 lb.) Paper stacker capacity Face Down: 250 Sheets (75gsm, 20 lb.) Warming up time Stand-by: 20 seconds First printing time Power save mode: 30 seconds Minimum PC spec Pentium II 300 MHz, 64MB RAM Duplex printing Yes

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4-1

Specifications

4-2 Facsimile

Machine type Desk top Applicable line G3 PSTN Compatibility ITU Group 3 Data coding MH/MR/MMR/JPEG (colour FAX transfer) FAX Mode Standard, fine, super fine, halftone Modem speed 33,600 bps Transmission speed Approx. 3 sec. Effective scanning width 208 mm (8.2 inches) Memory 4 M Byte Halftone 256 levels Automatic document feeder 30 pages (75gsm) LCD 16 characters x 2 lines

4-3 Scanner

Operation System Windows 95/98/2000/NT 4.0/Win-ME Interface IEEE 1284 (ECP Support), USB (without HUB Mode) Compatibility TWAIN standard, WIA Device Color CCD (charge coupled device) module Scan width Max.: 216 mm (8.5 inches), effective: 208 mm (8.2 inches) Color depth Internal 36 bit, external 24 bit Optical resolution (H x V) 600 x 600 dpi Interpolation resolution Max. 4800 dpi Pre-scan mode: Yes, 75 dpi Scan speed Mono: 1.25 msec/line, Color: 5 msec/line

(Pentium II 300MHz, 64MB Memory)

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4-4 Copier

Copy mode B/W Scanner type CCD, Flat-bed with automatic document feeder Maximum original size A4/letter Maximum paper size A4/letter/legal Maximum scan width 216 mm (8.5 inches) Optical resolution 600 x 600 dpi Copy quality Text/photo/mixed Paper type selection Plain, label, card stock, index, transparency Mono copy speed (Note 1) Platen (SDMP): 12 cpm

ADF (SDMP): 12 cpm

ADF (MDPS): text/mixed:6.6 cpm, photo: 3.3cpm Effective print-edge margin Top: 4mm, bottom: 4mm, each side: 4mm (0.16 inches) Multi copy 999 pages (memory multi copy: mono fast mode only)

Specifications

Zoom Rate Platen: 25% ~ 400% (1% step)

ADF: 25% ~ 100% (1% step) Fixed reduction/enlargement settings 100%, autofit, clone Contrast control 5 steps FCOT (platen/ADF) 9.8sec(300 dpi), 18sec(600dpi)

Note 1: Speed claims based on the test chart: Printed spdtst.sam(mono)/letter size. SDMP = single document multiple printout MDSP = multiple document single printout

4-5 Power Supply

Power rating AC 110V to 127V ± 15% 50/60Hz ± 3Hz,

AC 220V to 240V ± 15% 50/60Hz ± 3Hz Power consumption Average. 300W Power saving consumption Average. 30W

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4-3

Specifications

4-6 Dimension

Machine size (W x D x H) 554.5x 433.9 x 459.1 mm (21.8 x 17 x 18 inches) Machine weight About 23 Kg (50.6 pounds) with CRU

4-7 Packaging

Power cord 1ea (USA standard, ivory) IEEE 1284 cable No USB cable 1ea CD-ROM 1ea Cartridge Drum CRU 1EA, toner CRU 1EA Manual 1vol.

4-8 Environmental Condition

Absolute storage Temperature- 20 to 40 degrees C (68 to 104 degrees F)

Humidity 10% RH to 95% RH

Recommended operating condition

Temperature 6 to 30 degrees C (43 to 86 degrees F) Humidity 30% RH to 70% RH

4-9 Machine Life

Product life 5 years Product life in pages 150,000 printing pages (A4 size, 5% area coverage) Maximum monthly duty cycle 2,500 printing pages (A4 size, 5% area coverage)

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Circuit Description

5. Circuit Description

5-1 Main PBA

5-1-1 Summary

The main circuit that co nsi st s of CPU , MF P con troll er (bu ilt-i n 32bit RISC processor core: ARM7 TD MI) i ncl uding various I/O device drivers, system memory, scanner, printer, motor driver, PC I/F, and FAX transceiver controls the whole system. The entire structure of the main circuit is as follows:

OSC 20 MHz

POWER ON RESET

MODEM

CIP3

OSC.(Video)

45.3928 MHz

LIU

IMCS

/MIR0,

/RD,/WR

D0~D7

A0~A4

RST_OUT

/RST_OUT

/XDACK

/XDREQ

/SDIP CS

/RD,/WR

D0~D15

A0~A5

IOCS

PLL

Reset & WDT Generation

ROM/SRAM/ FLASH ROM Control (4 Bank)

I/O Control (5 Bank)

GPIO

Interrupt Control (4 External)

Timer (3 CH)

Tone Generator

VIS

Engine Comm. I/F

ADC

RAM : 512B

A/D BUS

ARM7TDMI Cache 8KB

CPU BUS Interface Block

SYSTEM BUS Interface Block [Arbiter]

UART (3 CH)

JBIG

LRAM:1296B CXRAM:256B

EDO/FPM DRAM Control (4 Bank)

GEU

PVC

PPI

DMAC (2 CH)

HCT

HPVC

RAM 512B+512B

/CS,/RD,/WR

MA MD

PROGRAM ROM 1MB x 4EA

RAS CAS

OSC. 48 MHz

SRAM 256K

USB INTERFACE IC (UNICON)

DATA RAM (DRAM) 8MB x 2EA

RTC

PARALLEL INTERFACE

OPE PANEL INTERFACE

USB

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Block Diagram

August 2001

5-1

Circuit Description

5-2 Circuit Operation

5-2-1 Clock

1) System Clock

Device Oscillator Frequency 20MHz

• KS32C61200 RISC PROCESSOR: drives PLL internally and uses 60MHz.

2) Video Clock

Device Oscillator Frequency 45.3928 MHz

• Fvd = ((PAPER 1SCAN LINE sending time * SCAN effective late /1SCAN LINE DOT #)*4 =(600dpi*600dpi*58.208mm/s*216mm*4)/(25.4mm*25.4mm*76.1%) = 28.697MHz.

•PAPER 1SCAN LINE sending time = SCAN LINE interval/DOCUMENT SPEED (58.208mm/S)

•1SCAN LINE DOT # = MAZ SCAN distance (216mm) *DOT # per 1mm.

3)USB Clock

Device Oscillator Frequency 48MHz

5-2-2 Power on/off Reset

1) Signal Operation

Input Signal +5V Power Line (VCC) Output Signal KS32C61200 nRESET 29F800B nRESET

• Power on/off detect VCC RISING/FALLING 4.5°¦4.6V Reset time (Td) 1.48 to1.52ms

• Td = (Ct*V sensing)/I charge (...Ct = 33µF, Is = 100µA)

2) Timing Chart

and SENSE

Threahold Voltage

3.6V

Output

Undefined

RESET

Output

Undefined

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Circuit Description

5-2-3 Risc Microprocessor

1) RISC microprocessor pin & interface

No Pin Name I/O Reset Value Description PAD

1 DATA0 I/O Input CPU Data Bus 0 PHBTT8, 8 mA 2 DATA1 I/O " CPU Data Bus 1 " 3 DATA2 I/O " CPU Data Bus 2 " 4 DATA3 I/O " CPU Data Bus 3 " 5 Vsso Vss - 5VGnd 6 DATA4 I/O Input CPU Data Bus 4 PHBTT8, 8 mA

7 Vddo Vdd - 5V

8 DATA5 I/O Input CPU Data Bus 5 PHBTT8, 8 mA

9 DATA6 I/O " CPU Data Bus 6 " 10 DATA7 I/O " CPU Data Bus 7 " 11 DATA8 I/O " CPU Data Bus 8 " 12 Vssi Vss - 3.3 V Gnd 13 DATA9 I/O Input CPU Data Bus 9 PHBTT8, 8 mA 14 Vddi Vdd 3.3 V 15 DATA10 I/O Input CPU Data Bus 10 PHBTT8, 8 mA 16 DATA11 I/O " CPU Data Bus 11 " 17 DATA12 I/O " CPU Data Bus 12 " 18 DATA13 I/O " CPU Data Bus 13 " 19 Vsso Vss - 5VGnd 20 DATA14 I/O Input CPU Data Bus 14 PHBTT8, 8 mA 21 DATA15 I/O " CPU Data Bus 15 " 22 DATA16 I/O " CPU Data Bus 16 " 23 DATA17 I/O " CPU Data Bus 17 " 24 Vsso Vss - 5VGnd 25 DATA18 I/O Input CPU Data Bus 18 PHBTT8, 8 mA 26 DATA19 I/O " CPU Data Bus 19 " 27 DATA20 I/O " CPU Data Bus 20 " 28 DATA21 I/O " CPU Data Bus 21 " 29 Vddi Vdd - 3.3 V 30 DATA22 I/O Input CPU Data Bus 22 PHBTT8, 8 mA

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5-3

Circuit Description

No Pin Name I/O Reset Value Description PAD

31 Vssi Vss - 3.3 V Gnd 32 DATA23 I/O Input CPU Dat a Bus 23 PHBTT8, 8 mA 33 DATA24 I/O " CPU Data Bus 23 " 34 Vddp Vdd - 5V 35 DATA25 I/O Input CPU Dat a Bus 23 PHBTT8, 8 mA 36 Vssp Vss - 5VGnd 37 DATA26 I/O Input CPU Dat a Bus 23 PHBTT8, 8 mA 38 DATA27 I/O " CPU Data Bus 23 " 39 Vddo Vdd - 5V 40 DATA28 I/O Input CPU Dat a Bus 23 PHBTT8, 8 mA 41 Vsso Vss - 5VGnd 42 DATA29 I/O Input CPU Dat a Bus 23 PHBTT8, 8 mA 43 DATA30 I/O " CPU Data Bus 23 " 44 DATA31 I/O " CPU Data Bus 23 " 45 Vssi Vss - 3.3 V Gnd 46 LFIA0 / OP4 O H Line Feed Mot or Phase A PHOB4, 4mA 47 Vddi Vdd - 3.3 V 48 LFIA1 / OP5 O H Line Feed Motor Phase /A PHOB4, 4mA 49 LFIB0 / OP6 O " Line Feed Mot or Phase B " 50 LFIB1 / OP7 O " Line Feed Motor Phase /B " 51 TnRST I TAP Controller Reset PHIT 52 TMS I TAP Controller Mode Sel PHIT 53 TDI I TAP Controller Data In " 54 TCK I TAP Controller Clock " 55 TDO O TAP Cont roller Data Out PHOB4 56 AVdd Vcca - Analog 3.3 V 57 AVin[0] I - Analog Input 0 PICA 58 AVin[1] I - Analog Input 1 " 59 AVss Vssa - Analog Gnd 60 AVssAVin[2] I - Analog Input 2 PICA

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Circuit Description

No Pin Name I/O Reset Value Description PAD

61 AVref I - Analog Positve Reference PICA 62 nIO CS0 O H IO Chipselect 0 PHOB4, 4 mA 63 nIOCS2/ToneOut O " IO Chipselect 2 / ToneOut " 64 nIOCS3/BufferSel O " IO Chipselect 2 / BufferSel " 65 Vssi Vss - 3.3 V Gnd 66 nSELECTIN I - Select Input PHIL, ST 67 nFAULT O H Fault for Error Condition PHOB8, 8 mA 68 nAUTOFD I - Auto Feed PHIL, ST 69 nINIT I - Initialization " 70 SELECT O L Parallel Port Select PHOB8, 8 mA 71 Vddp Vdd - 5V 72 PERROR O L Paper Error PHOB8, 8 mA 73 BUSY O " Parallel Port Busy PHOB8, 8 mA 74 nACK O H Parallel Port Acknowledge PHOB8, 8 mA 75 Vssp Vss - 5VGnd 76 PD0 I/O Input Parallel Port Data 0 PHBTT8, 8 mA 77 PD1 I/O " Parallel Port Data "

78 Vddi Vcca - 3.3 V f or Ring OSC 79 PD2 I/O Input Parallel Port Dat a PHBTT8, 8 mA

80 PD3 I/O " Parallel Port Data " 81 Vssi Vssa - 3.3 V Gnd for Ring OSC 82 PD4 I/O Input Parallel Port Dat a PHBTT8, 8 mA 83 PD5 I/O " Parallel Port Data " 84 Vddo Vdd - 5V 85 PD6 I/O Input Parallel Port Dat a PHBTT8, 8 mA 86 PD7 I/O " Parallel Port Data " 87 nSTROBE I - Data Strobe PHIL, ST 88 Vsso Vss - 5VGnd 89 RxD1 / CTin[2] I - Uart 1 Rx Dat a PHIL, ST 90 TxD1 O H Uart 1 Tx Data PHOB4, 4 mA

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5-5

Circuit Description

No Pin Name I/O Reset Value Description PAD

91 nDREQ1/RxD2/CTin[1] I - DMA Request1/Uart 2 RxD PHIL, ST 92 nDMACK1 / TxD2 O H DMA Ack1/Uart 2 TxD PHOB4, 4 mA 93 nIOCS1 / nIOCS5 O " IO CS1 / DMA IO1 CS " 94 Vddi Vdd - 3.3 V 95 nDREQ0 /IP1/CTin[0] I - DMA Request0 / Input Port PHIL, ST 96 nDMACK0 / OP1 O H DMA Ack1 / Out Port PHOB4, 4 mA 97 nIOCS4 / OP2 O " DMA IO0 CS / Out Port " 98 EIRQ0 I - External Interrupt 0 PHILU50, ST 99 EIRQ1 I - External Interrupt 1 "

100 EIRQ2 I - Externa l Interrupt 2 " 101 nWait/EIRQ3 I - Wait Request / Ex. IRQ 3 " 102 Vssi Vss - 3.3 V Gnd 103 VCLK I - Video Clock Input PHIC 104 Vddi Vdd - 3.3 V 105 IP[7] / nFSYNC I - Input Port / Frame Sync PHIL, ST 106 nLSYNC I - Line Sync " 107 OP[8 ] / nPRIN T O H OutPort/PrintStart PHOB4, 4 mA 108 Vssi Vss - 3.3 V Gnd 109 VDO O H Vi deo Data Output PHOB16, 16mA 110 Vsso Vss - 5VGnd 111 CCLK / PWM[0] O H Com. Clock / PWM [0] PHOB4, 4 mA

112 nEPRDY / RxD0 I -

Engine Power Ready

PHIL, ST

/Uart0RxData

Command Busy

113 nCBSY / TxD0 O H

PHOB4, 4 mA

/Uart0TxData 114 nEMSG / PWM[1] I/O Input Eng. Message / PWM [1] PHBLT4,ST,4mA 115 nEBSY / nLsuReady I - Eng. Busy / LSU Ready PHIL, ST 116 nCMSG / PWM[ 2] O H Com. Busy / PWM [2] PHOB4, 4 mA 117 Vddo Vdd - 5V 118 nDRAMCAS0 O L DRAM Cas Strobe 0 PHOB8, 8 mA 119 nDRAMCAS1 O " DRAM Cas Strobe 1 " 120 nDRAMCAS2 O " DRAM Cas Strobe 2 "

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Circuit Description

No Pin Name I/O Reset Value Description PAD 121 nDRAMCAS3 O L DRAM Cas Strobe 3 PHOB8, 8 mA 122 Vsso Vss - 5VGnd 123 nDRAMOE O H DRAM Data Out Enable " 124 nDRAMWE O H DRAM Data Write Enable " 125 Vssi Vss - 3.3 V Gnd 126 nDRAMRAS0 O L DRAM Ras Strobe 0 PHOB8, 8 mA 127 Vddi Vdd - 3.3 V 128 nDRAMRAS1 O L DRAM Ras Strobe 1 PHOB8, 8 mA 129 nDRAMRAS2 O " DRAM Ras Strobe 2 " 130 nDRAMRAS3 O " DRAM Ras Strobe 3 " 131 Vsso Vss - 5VGnd 132 DRAMD0 I/O Input DRAM Data Bus 0 PHBTT12, 12mA 133 Vddo Vdd - 5V 134 DRAMD1 I/O Input DRAM Data Bus 1 PHBTT12, 12mA 135 DRAMD2 I/O " DRAM Data Bus 2 " 136 DRAMD3 I/O " DRAM Data Bus 3 " 137 DRAMD4 I/O " DRAM Data Bus 4 " 138 Vsso Vss - 5VGnd 139 DRAMD5 I/O Input DRAM Data Bus 5 PHBTT12, 12mA 140 DRAMD6 I/O " DRAM Data Bus 6 " 141 DRAMD7 I/O " DRAM Data Bus 7 " 142 Vssi Vss - 3.3 V Gnd 143 DRAMD8 I/O Input DRAM Data Bus 8 PHBTT12, 12mA 144 Vddi Vdd - 3.3 V 145 DRAMD9 I/O Input DRAM Data Bus 9 PHBTT12, 12mA 146 DRAMD10 I/O " DRAM Data Bus 10 " 147 DRAMD11 I/O " DRAM Data Bus 11 " 148 Vssp Vss - 5VGnd 149 DRAMD12 I/O Input DRAM Data Bus 12 PHBTT12, 12mA 150 Vddp Vdd - 5V

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5-7

Circuit Description

No Pin Name I/O Reset Value Description PAD 151 DRAMD13 I/O Input DRAM Data Bus 13 PHBTT12, 12mA 152 DRAMD14 I/O " DRAM Data Bus 14 " 153 DRAMD15 I/O " DRAM Data Bus 15 " 154 DRAMD16 I/O " DRAM Data Bus 16 " 155 Vsso Vss - 5VGnd 156 DRAMD17 I/O Input DRAM Data Bus 17 PHBTT12, 12mA 157 Vddo Vdd - 5V 158 DRAMD18 I/O Input DRAM Data Bus 18 PHBTT12, 12mA 159 DRAMD19 I/O " DRAM Data Bus 19 " 160 DRAMD20 I/O " DRAM Data Bus 20 " 161 DRAMD21 I/O " DRAM Data Bus 21 " 162 Vssi Vss - 3.3 V Gnd 163 DRAMD22 I/O Input DRAM Data Bus 22 PHBTT12, 12mA 164 Vddi Vdd - 3.3 V 165 DRAMD23 I/O Input DRAM Data Bus 23 PHBTT12, 12mA 166 DRAMD24 I/O " DRAM Data Bus 24 " 167 DRAMD25 I/O " DRAM Data Bus 25 " 168 DRAMD26 I/O " DRAM Data Bus 26 " 169 Vsso Vss - 5VGnd 170 DRAMD27 I/O Input DRAM Data Bus 27 PHBTT12, 12mA 171 Vddo Vdd - 5V 172 DRAMD28 I/O Input DRAM Data Bus 28 PHBTT12, 12mA 173 DRAMD29 I/O " DRAM Data Bus 29 " 174 DRAMD30 I/O " DRAM Data Bus 30 " 175 DRAMD31 I/O " DRAM Data Bus 31 " 176 Vsso Vss - 5VGnd 177 DRAMA0 O L DRAM Address Bus 0 PHOB8, 8 mA 178 DRAMA1 O " DRAM Address Bus 1 " 179 DRAMA2 O " DRAM Address Bus 2 " 180 DRAMA3 O " DRAM Address Bus 3 "

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Circuit Description

No Pin Name I/O Reset Value Description PAD 181 DRAMA4 O L DRAM Address Bus 4 PHOB8, 8 mA 182 Vsso Vss - 5VGnd 183 DRAMA5 O " DRAM Address Bus 5 " 184 DRAMA6 O " DRAM Address Bus 6 " 185 DRAMA7 O " DRAM Address Bus 7 " 186 Vddo Vdd - 5V 187 DRAMA8 O L DRAM Address Bus 8 PHOB8, 8 mA 188 Vsso Vss - 5VGnd 189 DRAMA9 O L DRAM Address Bus 9 PHOB8, 8 mA 190 DRAMA10 O " DRAM Address Bus 10 " 191 DRAMA11 O " DRAM Address Bus 11 " 192 Vssi Vss - 3.3 V Gnd 193 nROMCS0 O H ROM Chip Select 0 PHOB4, 4 mA 194 Vddi Vdd - 3.3 V 195 nROMCS1 O H ROM Chip Select 1 PHOB4, 4 mA 196 nROMCS2 O " ROM Chip Select 2 " 197 nROMCS3 O " ROM Chip Select 3 " 198 nROMRD O " ROMorIORead PHOB8, 8 mA 199 Vssp Vss - 5VGnd 200 nROMWR O H ROMorIOWrite PHOB8, 8 mA 201 Vddp Vdd - 5V 202 ADDR2 O L Address Bus 2 for ROM PHOB8, 8 mA 203 ADDR3 O " Address Bus 3 for ROM " 204 ADDR4 O " Address Bus 4 for ROM " 205 Vsso Vss - 5VGnd 206 ADDR5 O L Address Bus 5 for ROM PHOB8, 8 mA 207 ADDR6 O " Address Bus 6 for ROM " 208 ADDR7 O " Address Bus 7 for ROM " 209 Vssi Vss - 3.3 V Gnd 210 ADDR8 O L Address Bus 8 for ROM PHOB8, 8 mA

WorkCentre Pro 412 Launch Issue

August 2001

5-9

Circuit Description

No Pin Name I/O Reset Value Description PAD 211 ADDR9 O L Address Bus 9 for ROM PHOB8, 8 mA 212 Vddo Vdd - 5V

213 ADDR10 O L Address Bus 10 for ROM PHOB8, 8 mA 214 Vsso Vss - 5VGnd 215 ADDR11 O L Address Bus 11 for ROM PHOB8, 8 mA 216 ADDR12 O " Address Bus 12 for ROM " 217 ADDR13 O " Address Bus 13 for ROM " 218 ADDR14 O " Address Bus 14 for ROM " 219 Vsso Vss - 5VGnd 220 ADDR15/CTOut[0] O L Address Bus 15 for ROM PHOB8, 8 mA 221 ADDR16/CTOut[1] O " Address Bus 16 for ROM " 222 ADDR17/CTOut[2] O " Address Bus 17 for ROM " 223 ADDR18/CTOut[3] O " Address Bus 18 for ROM " 224 Vsso Vss - 5VGnd 225 ADDR19/CTOut[4] O L Address Bus 19 for ROM PHOB8, 8 mA 226 ADDR20/CTOut[5] O " Address Bus 20 for ROM " 227 ADDR21/CTOut[6] O " Address Bus 21 for ROM " 228 ADDR22/CTOut[7] O " Address Bus 22 for ROM " 229 Vddo Vdd - 5V 230 ADDR23/PTOut O L Address Bus 23 for ROM PHOB8, 8 mA 231 Vsso Vss - 5VGnd 232 TESTSE I - Scan Enable :Tied to Gnd PHILD50, ST 233 TM I - TestMode:TiedtoGnd " 234 Vddi Vcca - 3.3 V for PLL 235 MCLK I - Master Clock PHIC 236 Vssi Vssa - 3.3 V Gnd for PLL

237 FILTER O -

238 CPUTEST I -

Charge Pump Out :

Capacit or is connected

CPU Test Mode :

Tied to Gnd

POBA

PHILD50, ST

239 nRESET I - Reset Input PHIL, ST 240 nRSTOUT O L Reset Output PHOB8, 8 mA

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Circuit Description

5-2-4 Program ROM (Flash Memory) Control

1) Device

Type No. AM29F800B Capacity 4 Mbyte (512K * 16BITS * 4)

2) Programming

Before assembly EPROM programmer or programming at the factory After assembly Download from PC

3) Operating Principle

When the RCSO(ROM CHIP SELECT) signal is activated from the CPU after the POWER is ON, it activates RD SIGNAL and reads the DATA(HIGH/LOW) stored in the FLASH MEMORY to control the overall system. The FLASH MEMORY may also write. When turning the power on, press and hold the key (power switch) for 2 - 3 seconds, then the LED will scroll and the PROGRAM DOWNLOAD MODE will be activated. In this mode, you can download the program through the parallel port.

Tr TwTwTwTwTwTwTw TrTrTrTrTdTa

MCLK

nWR

A23-2

ROMCS

nTA

SETUP

Write Timing Diagram for Two Beat Burst Cycle

ACC+1

HOLD

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5-11

Circuit Description

5-2-5 Dram Control

1) Device

Type No. K4E6411D EDO type Capacity 4Mbytes (1M*16BITS*2)

2) Operating Principle

DRAM can either read or write. The data ca n be stored in the DRAM on ly when the power is on. It stores data white the CPU processes data. The addres s to read and write the data is spe cified by RAS SIGNAL and CAS SIGNAL.DRAMWE*SIGNAL is activated when writing data and DRAMOE*SIGNAL, when reading. You can expand up to 64MBYTE of DRAM in this system.

0xf f f ff f f

bank3 Next

bank3 Base

bank2 Next

bank2 Base

bank1 Next

bank1 Base

bank0 Next

bank0 Base

DRAM Bank Configuration

0x00

000

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Circuit Description

5-2-5-1 FPM DRAM Reading Timing

Fast Page Mode DRAM can access the page mode. It can read consecutive cells by accessing the page mode while accessing the burst. For FPM DRAM, the data are valid only when the nCAS is active. While configuring the software, you must set the timing register of SFR considering the clock speed and the DRAM spec.

5Mhz

MCLK

nRAS

nCAS

DRAMA

nOE

nWE

DRAMD

addr

wait waitdata

row address

Trp Trc

column address

Tcas

data

column address

data 1data 0

Tcas

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FPM Read Timing Diagram

August 2001

5-13

Circuit Description

5-2-5-2 FPM DRAM Write Timing

5Mhz

MCLK

nRAS

nCAS

DRAMA

nOE

nWE

DRAMD

addr

wait waitdata

row addres s

column address

data 0

column address

data 1

Trp Trc Tcas Tcas

data

clock

58Mhz

FPM Write Timing Diagram

Trp Trc Tcas

type

cycle

40 ns FPM 2 0x1 2 0x1 1 0x0 50 ns FPM 2 0x1 2 0x1 1 0x0 60 ns FPM 3 0x2 2 0x1 2 0x1

70 ns FPM 3 0x2 2 0x1 2 0x1

SFR Values Example for FPM

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Circuit Description

5-2-5-3 EDO DRAM Read Timing

Basically the Extende d Dat a Out DRAM i s simil ar t o Fast Page Mode DRA M. For FPM, the data a re val id onl y when the nCAS is active while reading the internal data, however, it has a latch that the data will be continuously outputted even after the nCAS is inactivated. While configuring the software, you must set the timing register of SFR considering the clock speed and the DRAM spec.

wait

data

5Mhz

MCLK

nRAS

nCAS

addr

wait

data

DRAMA

nOE

nWE

DRAMD

Trp

row address

column

data0

Trc Tcas

EDO Read Timing Diagram

Tcas

column

data 1

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5-15

Circuit Description

5-2-5-4 edo DRAM Write Timing

addr

5Mhz

MCLK

nRAS

nCAS

wait

data

wait

data

DRAMA

nOE

nWE

DRAMD

clock

row address

Trp

type

cycle

40 ns EDO 2 0x1 2 0x1 1 0x0

Trc

FPM Write Timing Diagram

Trp Trc Tcas

column

Tcas

column

data 1data 0

Tcas

5-16

58Mhz

50 ns EDO 2 0x1 2 0x1 1 0x0 60 ns EDO 3 0x2 2 0x1 1 0x0

70 ns EDO 3 0x2 2 0x1 2 0x1

SFR Values Example for FPM

August 2001

WorkCentre Pro 412

Launch Issue

Circuit Description

5-2-6 FS781 (Frequency Attenuator)

This system used FS741 for the main clock for EMI suppression. It spreads the source c lock in a con sistent b andwidth to d isperse the en ergy gathe red in order to attenuate t he energy. The capacitor value of the loop filter (PIN 4) is set depending on the source clock used or the spread bandwidth. Refer to FS781 Spec. for detail.

5-2-7 USB (Universal Serial Bus)

NS’s USBN9602 is used as the interface IC and 48MHz clock is used. When the data i s rece ived through the U SB port, EIRQ1 SIGN AL is activate d to s end in terrupt to CPU, then it directly sends the data to DRAM by IOCS4* & DRAMA(11) SIGNAL through DRAMD (24;31).

5-2-8 SRAM; 32KB SRAM

It stores a variety of option data.

5-2-9 FAX Transceiver

5-2-9-1. General

This circuit processes transmission signals of modem and between LIU and modem.

5-2-9-2. Modem (u44)

FM336 is a single shi p fax m odem. It ha s func tions of DTM F detec tion an d DTM F signa l produ ction a s we ll as functions of modem. TX A1, 2 is transmission output port and RX IN is received data input port. / POR signal controlled by MFP controller (U3:KS32 C61200) can initialize modem (/M_RST) witho ut turning of f the system. D0-D7 are 8-bit data buses. RS0-RS4 signals to select the register in modem chips. /RS and /WR signals control READ and WRITE respectively. /IRQ is a signal for modem interrupt. Transmission speed of FM336 is supported up to 33.6k. The modem is connected to LINE through transformer directly.

WorkCentre Pro 412 Launch Issue

FAX TRANSCEIVER

August 2001

5-17

Circuit Description

5-3 Scanner

5-3-1 Summary

This flat-bed type device to read manuscripts has 600dpi CCD as an image sensor. There is one optical sensor for detecting CCD home position and Scan-end position. The home position is detected by a optical sensor which is attached to the CCD Module. The Scan-end position is calculated by the number of motor steps.

CCD

Contact Image Sensor improves productivity and allows a compact design.

This machine uses a color CCD.

• Minimum scan line time for one color: 5mS.

• Light source power: +12V.

• Maximum pixel frequency: 6 MHz.

• Effective sensor element: 5340 X 3.

• Clamp level: 0.7 to 0.8V.

• Bright output: min. 0.8V.

R_L ED , G_LED,

AIN

AD C_ REF T

PI_TG

PI 1

ADC_REFB

PI 2

B _LED

EXT SRAM

IRQ

[AFE]

12-bit

A/ D converter

SRA M

1024x8

(R/G/B)

SRA M

8192x8

(2line)

Interrupt

Cont ro l

CPU I/ F

Module

Sensor

Int er fa ce

Gamma

Correction

Enlargement

/ Reduct ion

Vp e ak

Cont ro l

CIP3

Shading

Correction

Shading

Ac quisit ion

Image

Process ing

Module

DMA

Int er fa ce

Vertical

Decimation

SRA M

256x8

SRAM

4096x16

(2 line )

Motor

Con tro l

SRA M

1 024x8

SRAM_A[ 15:0] SRAM_D[ 15:0] SRA M_n RD SRA M_n WR

TX_A, B

nTX_A, B

TX_EN1, EN2

5-18

A [5 : 0] D [15 : 0]nCS nRD n WR nXD REQ n XDACK

DUOIP2 Block Diagram

August 2001

WorkCentre Pro 412

Launch Issue

5-3-2 Key Features Overview

(1) 0.5µm C-MOS process (TLM), 208-PIN QFP, STD85 library. (2) Frequency: 50 MHz. (3) On-Chip oscillator . (4) Method: Raster scanning method. (5) Image Sauce: 300/400/600dpi CIS & CCD. (6) Scanning Mode.

• color gray image: each 8 bits / RGB.

• mono gray image: 8 bits / pixel.

• binary image: 1 bit / pixel (for text/photo/mixed mode).

(7) Maximum scanning width: A3, 600dpi (8K effective pixels). (8) Ideal MSLT (A4, 600/300dpi).

• color gray image: 3x5Kx80nsec = 1.2msec (7/28 CPM).

• mono gray image: 1x5Kx80nsec = 0.4msec (21/84 CPM).

• binary image: 1x5Kx80nsec = 0.4msec (21/84 CPM).

(9) A/D conversion depth: 12bits.

Pixel Processing Structure

• Minimum pixel processing time: 4 system clocks.

• High speed pipe-lined processing meth od.

(Shading correction, gamma correction, enlargement/reduction, and binarisation).

Circuit Description

Shading Correction

(1) White shading correction support for each R/G/B. (2) White shading data memory: 3x8Kx12bits = 288Kbits → 384Kbits (external). (3) Black shading data memory: 3x8Kx12bits = 288Kbits → 384Kbits (external).

Gamma Correction

(1) Independent gamma table for each RGB component. (2) Gamma table data memory: 3x1Kx8bits = 24Kbits (internal).

Binarisation (mono)

(1) 256 Gray’s halftone representation for photo document: 3x5 EDF (Error DifFusion) method proposed by

Stucki.

(2) LAT (Local Adaptive Thresholding) for text document:

• use of 5x5 LOCAL WINDOW (TIP ALGORITHM).

• ABC (Automatic Background Control): Tmin automatic change.

(3) Mixed mode processing for te xt/photo mixed document. (4) EDF data memory: 2x4Kx16bits = 128Kbits (internal). (5) LAT data memory: 4x4Kx16bits = 256Kbits (external).

Scaling of Input Image

(1) Scaling factor:

• Horizont al direction: 25 to 800% by 1% unit.

• Vertical direction: 25 to 100% by 1% unit.

(2) Scaling data memory: 2x8Kx8bits = 128Kbits (internal).

WorkCentre Pro 412 Launch Issue

August 2001

5-19

Circuit Description

Intelligent scan motor controller

(1) Automatic acceleration/deceleration/uniform velocity. (2) Data memory: 256x16bits = 4Kbits (internal).

Auto-Run

Automatic CLK_LINE (line processing start control) and •’TG (line scan start control) signal generation. (1)Available re-synchronisation of øTG signal.

(2) programmable øTG’s period & CLK_LINE’s occurrence number.

Processed data output format in DTM (Data Transfer Module)

(1)DMA mode: Burst/On-demand mode. (2) CDIP I/F: LINE_SYNC, PIXEL_SYSNC, PIXEL_DATA[7:0].

36 General Purpose Input/Output: 8(GPO), 28(GPIO) Black/White reversion, and Image Mirroring support

DATA MEMORY

CPU

(Jupiter)

ADD R- BUS ADDR-B US

DATA- BUS

ADDR BUS

DATA BUS

Scan/Motor

Driver

CIP3

DMA Controller

(Jupiter)

CLK_LINE

CLK_PIX

LINE_PERIO D

IW IN

ADC_CLK

CD S2 _CLK

AFE Control

Signal

PI_T G

PI1, PI2

Tx_A, Tx_B,

nTx_A, nTx_B

A C K

R E Q

Image

Processor

AFE

Analog Signal

Scanner

D OCU MEN T I MAG E

1M b it

SRAM

12b it ADC

12bit (R/ G/ B)

5-20

External interface with CIP3

August 2001

WorkCentre Pro 412

Launch Issue

AIN

AD C_R EF T

ADC_REFB

PI_TG

PI 1

PI 2

R_L ED , G_LED,

B _LE D

Circuit Description

EXT SRAM

IRQ

[AFE]

12-bit

A/ D c onverter

SRA M

1024x8

(R/G/ B)

SRA M

8192x8

(2line)

Interrupt

Contro l

CPU I/ F

Module

Sensor

Int e rf ace

Gamma

Correction

Enlargemen t

/ Reduc tion

Vp e a k

Cont ro l

CIP3

Shading

Correction

Shading

Ac qu isitio n

Imag e

Processing

Module

DMA

Int e rf ace

Vertical

Decimation

SRA M

256x8

SRAM

4096x16

(2 line )

Motor

Con tro l

SRA M

1 024x8

SRAM_A[ 15:0] SRAM_D[15:0] SRA M_ nRD SRA M_ nWR

TX_A, B

nTX_A, B

TX_EN1, EN2

WorkCentre Pro 412 Launch Issue

A [ 5:0] D [ 15 : 0]nCS nRD nWR nXDREQ n XDAC K

Block diagram of CIP3

August 2001

5-21

Circuit Description

5-4 Host Interface

Referred to IEEE 1284 standard.

5-4-1. Host Interface

PARALLEL PORT INTERFACE PART KS32C61200 enables the parallel interface with the PC. This part is connected to the PC through a Centronics connector. It generates major control signals that are used to actuate parallel communication. It is comprised of/ERROR, PE, BUSY, /ACK, SLCT, /INIT, /SLCTIN, /AUTOFD and /STB. This part and the PC data transmission method support the method specified in IEEE P1283 Parallel Port Standard (http://www.fapo.com/ieee1284.html). In other words, it supports both compatibility mode (basic print data transmitting method), the nibble mode (4bit data; supports data uploading to PC) and ECP (enhanced capabilities port: 8bits data - high speed two-way data transmission with PC). Compatibility mode is generally referred to as the Centronics mode and this is the protocol used by most PCs to transmit data to the printer. ECP mode is an improved protocol for the communication between PC and peripherals such as printer and scanner, and it provides high speed two-way data communication. ECP mode provides two cycles in the two-way data trans miss ion; da ta cycle a nd com mand cyc le. The c omma nd cycle h as two formats; Run-Length Count a nd Channe l Addres sing. RL E (Run-L ength Cou nt) has high co mpres sion rat e (64x) and it allows real-time data c ompres sion that i t is use ful f or the printer an d scan ner that ne ed to tran smit la rge raster images . Channel Addressing was designed to address multiple devices with single structure. For example, like this system, when the fax/printer/scanner have one structure, the parallel port can be used for other purposes while the printer image is being processed.This system uses RLE for high speed data transmission. PC control signals and data send/receive tasks such as PC data printing, high speed uploading of scanned data to PC, upload/download of the fax data to send or receive and monitoring the system control signal and overall system from PC are all processed through this part.

5-22

Compatibility Hardware Handshaking Timing

August 2001

WorkCentre Pro 412

Launch Issue

Circuit Description

ECP Hardware Hand sha k ing Timing (forward)

1. The host places data on the data lines and indicates a data cycle by setting nAUTOFD.

2. Host asserts nSTROBE low to indicate valid data.

3. Peripheral acknowledges host by setting BUSY high.

4. Host sets nSTROBE high. This is the edge that should be used to clock the data into the Peripheral.

5. Peripheral sets BUSY low to indicate that it is ready for the next byte.

6. The cycle repeats, but this time it is a command cycle because nAUTOFD is low.

BYTE1

COMM AND BYTE

nACK

nAUTOFD

(7: 0)

PPD

BUSY

nINIT

12 3 4 56

BYTE0

DATA BYTE

ECP Hardware Hand sha k ing Timing (forward)

1. The host request a reverse channel transfer by setting nINIT low.

2. The peripheral signals that it is OK to proceed by setting PE low.

3. The peripheral places data on the data lines and indicates a data cycle by setting BUSY high.

4. Peripheral asserts nACK low to indicate valid data.

5. Host acknowledges by setting nAUTOFD high.

6. Peripheral sets nACK high. This is the edge that should be used to clock the data into the host.

7. Host sets nAUTOFD low to indicate that it is ready for the next byte.

8. The cycle repeats, but this time it is a command cycle because BUSY is low.

WorkCentre Pro 412 Launch Issue

August 2001

5-23

Circuit Description

5-4-2 USB INTERFACE

5-4-2-1 Features

• Full-Speed USB Node Device.

• USB transceiver.

• 3.3V signal voltage regulator.

• 48 MHz oscillator circuit.

• Programmable clock generator.

• Serial Interface Engine consisting of Physical Layer In terface (PHY) and Media Access Control ler (MAC),

USB Specification 1.0 compliant.

• Control/Status Register File.

• USB Function Controller with seven FIFO-based End-points.

• One bidirectional Control Endpoint 0 (8bytes).

• Three Transmit Endpoints (2*32 and 1*64 bytes).

• Three Receive Endpoints (2*32 and 1*64 bytes).

• 8-bit parallel interface with two selectable modes - non-multiplexed.

• multiplexed (Intel compatible).

• DMA support for parallel interface.

• MICROWIRE/PLUS Interface.

• 28-pin SO package.

5-24

August 2001

WorkCentre Pro 412

Launch Issue

Circuit Description

CS A0 VVR

D[7:0]

DAT A_IN

DAT A_OUT

ADDR

Non-Multiplexed Mode Interface Block Diagram

ADDRESS

0x00

0x3F REGISTERFILE

VVR

D[7:0]

input

vvrte Address

Non-Multiplexed Mode Basic Timing Diagram

out

Read Data

out

Burst Read Data

WorkCentre Pro 412 Launch Issue

August 2001

5-25

Circuit Description

5-5 Engine Controller

5-5-1. Fuser Control / Thermistor Circuit

This circuit controls th e heat la mp temp erat ure to fix the trans ferred ton er on the p aper. It is comprised of the thermistor that has the negative resis tanc e ag ain st the temp erature and LM393 (voltage comparator) and transistor for switching. The thermistor has the resistance value reverse proportional to the heat lamp surface temperature. The voltage value is read by #60 pin(AVIN2) of CPU referring to the parallel combined resistance with the resistor(R43) connected parallel to it and the voltage distribution of R29. The voltage read activates (inactivates) ‘fuser’ signal to high (or low) referring to the set temperature and when the ‘FUSERON’ signal turns down (high) to low (high) by Q3 switching, the S21ME4 inside SMPS (PC3) turns on (off) and this eventually turns two-way thyristor(THY501) on (off) to allow (shut) AC voltage to the heat lamp.

LM393 is hardware designed to protect the system when the firmware that controls the heat lamp no longer functions correctly. When the thermistor temperature goes beyond 210 degrees C, the level of pin #1 (LM393) will turn low, which turns the ‘FUSERON’ signal to high. The LM393 will force the heat lamp off by forcefully shutting off the power to Q3.

5-5-2. Paper Sensing Circuit

1) Cover Open Sensing

Cover open senso r is l ocated on the righ t side of the printer. In case the right cover is open, it shu ts +5V

(LSU laser unit) and +24V(main motor, polygon motor of fixer LSU and HVPS) that are supplied to each unit. It detects the cover opening through CPU. In this case, the red LED of the OP panel LED will turn on.

2) Paper Empty Sensing

The paper empty sensor (photo interrupt or), located ins ide bottom o f the bin cas sette detects paper with

the actuator connected to it and informs the CPU of whether there is paper. When there is no paper in the cassette, the red LED of the OP panel LED will turn on to tell the user to fill the cassette with paper.

3) Paper Feeding

When the paper is fed into the set and passes through the actuator of the feed sensor unit, transistor inside the photo interrupter will turn on, ‘nFEED’ signal will turn low and inform CPU that the paper is currently fed into the system. CPU detects this signal and sprays video data after certain time (related to paper adjustme nt). If th e paper does n ot hit the feed se nsor wit hin ce rtain ti me, C PU detec ts this and informs as “Paper Jam0” (red LEDs on the OP panel will turn on).

4) Paper Exit Sensing

The system detects the paper going out of the set with the exit sensor assembled to the actuator

attached to the frame. If CPU does not turn back high a while after the paper hits the exit sensor, CPU detects this and inform as “Paper Jam2” (red LEDs on the OP panel will turn on).

5-26

August 2001

WorkCentre Pro 412

Launch Issue

Circuit Description

5-5-3. LSU Circuit

1) Polygon Motor Unit (actuated by +24V)

The polygon motor inside LSU rotates by the ‘PMOTOR’ signal. When it reaches the motor constant

velocity section thro ugh t he in iti al tra ns ien t (tran sie nt res po nse ) se cti on, i t se nds the ‘nLREADY’ signal to the CPU.

The ‘clock’ pin is the pin that receives clock of the required frequency when LSU uses external CLK as

the motor rotational fr equency. Currently the external clock circ uit is locate d in the HVPS a nd 1686 Hz =

6.9083MHz (crystal frequency)÷212(74HC4060N IC), is used as the rotational frequency of the polygon motor.

2) Laser Unit (actuated by +5V)

After laser is turned on by ‘nLD_ON’ signal, it is reflected by 6 mirrors (polygon mirror) attached to the

polygon motor and performs scan in horizontal way.When the laser beam hits the corner of the polygon mirror, it generates ‘nHSYNC’ signal (pulse) and the CPU forms the left margin of the image using this signal (horizontal synchronous signal).

There are no user-serviceable parts inside the Laser unit.

5-5-4. Fan/Solenoid Actuation Circuit

The fan actuation circuit gets its power using NPN TR. When it receives ‘FAN’ signal from the CPU. The TR will turn on to make the voltage supplied to the fan to 24V in order to actuate the fan. The solenoid is actuated in the same way. When it receives control signal from the CPU, the solenoid for paper feeding is actuated by switching circuit. D29(1N4003) diode is applied to the both ends of the output terminal to protect Q22(KSC1008-Y) from noise pulse induced while the solenoid is de-energized.

5-5-5. PTL Actuation Circuit

PTL actuation circuit switches its power using NPN TR.

5-5-6. Motor Actuation Circuit

Motor actuation circuit is d eterm in ed w hi le sel ec ting the i nitial driver IC (provided by the v en dor). T his sy ste m uses TEA3718(U57, U58), A2918(U59)’s motor driver IC. However, the sensing resistance (R273, R274, R292, R293) and reference resist ance (R28 4, R28 9, R294, R2 95) can vary d ependi ng on th e motor a ctuation current value. It receives motor enable signal (2 phase) from CPU and generates bipolar pulse (constant-current) and sends its output to stepping motor input.

WorkCentre Pro 412 Launch Issue

August 2001

5-27

Circuit Description

5-5-7. High Voltage Power Supply

5-5-7-1. Summary

It is the high voltage power supply that has DC+24V/DC+5V (used for the image forming device in OA digital picture developing method) as the rated inputs. It supplies electrifying voltage (MHV), supply voltage (SUPPLY), developing voltage (DEV), blade voltage (BLADE) and transferring voltage (THV). Each high voltage supply shows the voltage required in each digital picture process.

5-5-7-2. Digital Picture Process

Digital picture developing method is widely used by copy machine, laser beam printer and fax paper. The process is comprised of electrification, exposure, develop, transfer and fixing.

BLADE

LSU

MHV

SUPPLY

DEV

SUPPLY ROLLER

HEAT ROLLER

PRESSURE ROLLER

ELECTRIFICATION ROLLER

TRANSFER ROLLER

DEVELOPER ROLLER

DIRECTION OF PAPER

THV

First, in the electrification process, retain constant charge at approx. -900V for the electric potential on the OPC surface by electrifying OPC drum at approx. -1.4KV through the electrification roller. The electrified surface of OPC is exposed responding to the video data by the LSU that received print command due to rotation. The unexposed non-video section will retain the original electric potential of -900V, but the electric potential of the im age area e xpo se d by LSU will be ap prox . -18 0V tha t it w il l form the electrostatic latent image. The surface of the photo-conductive drum where the electrostatic latent image is formed reaches the developer as the drum rotates. Then the electrostatic latent image formed on the OPC drum is developed by the toner supplied to the developing roller by supplying roller and it is transformed into visible image. It is the process to c han ge th e aft erim ag e on th e O PC drum surf ace formed by LSU into visible im age by the toner particles. While the supply roll er en ergi zed with -450V by HVPS and the d evelop er rol ler ene rgiz ed wi th -300 V rota te in the same direction, it keeps the toner particles between two rollers supplied to OPC drum in negative state by the friction between two rollers. The toner supplied to the developer roller is biased to bias electric potential by the developer roller and transferred to the developin g area. After (-) to ner is attached to the develop er roller , it will mov e to the expose d high electric potential surface (-180V) rather than to the unexposed low electric potential surface (-900V) of the developer roller and OPC d rum . Eve ntua lly th e to ner w i ll n ot s ett le i n th e lo w ele ctric p ote ntia l s urfa ce to fo rm the visible image. Later, the OPC drum continues to rotate and reaches to transfer location in order to accomplish the transfer process. This process transfers the (-)to ner on th e transfe r roller to the prin ting pap er by the transfer roller. The (-)toner attached to the OPC drum will be energized to hundreds to thousands of the (+)transfer voltage by HVPS. The (+)electrostatic force of the tra nsfer rolle r generated has highe r adhesivene ss than t he (-)toner O PC drum and thus it moves to the surface of the paper passing through the transfer roller. The toner transferred to the paper with weak electrostatic force is fixed to the paper by the press ure and h eat of the fixer composed of pressure roller and heat roller. The toner attached to the paper is melted by applying the heat (approx. 180°C) from the heat roller and the pressure (approx. 4kg) from the pressure roller. After the fixing process, the paper is sent out of the set to finish the printing process.

5-28

August 2001

WorkCentre Pro 412

Launch Issue

Circuit Description

5-5-7-3. Organization of the Device

HVPS is comprised of electrification output unit, bias output unit and transfer output unit.

1) Input Unit.

2) Electrification Output (Enable) Unit: MHV (Main High Voltage).

3) Bias Output (Enable) Unit: DEV (Development Voltage)/Supply (Supply Voltage)/BLADE (Blade Voltage).

4) Transfer ‘+’ Output (Enable) Unit: THV (+) (Transfer High Voltage(+)).

5) Transfer ‘-’ Output (Enable) Unit: THV (-) (Transfer High Voltage(-)).

6) Switching Unit.

7) Feedback Unit.

8) Regulation Unit.

9) Output Unit.

HV-PWM

THVPWM

THVEA

SWITCHING CONTROL UNIT

PWM CONTROL UNIT

SWITCHING CONTROL UNIT

TRANS

REGULATION CIRCUIT

Electrification Unit Block-Diagram

SWITCHING CONTROL UNIT

FEEDBACK

TRANS

REGULATION CIRCUIT

OUTPUT CIRCUIT

REGULATION CIRCUIT

MHV

THV

THVREAD

WorkCentre Pro 412 Launch Issue

THV ENVIRONMENT RECOGNITION CIRCUIT

FEED BACK

Transfer Output Unit B l ock Diagram

August 2001

5-29

Circuit Description

MHV-PWM

PWM CONTROL UNIT

SWITCHING CONTROL UNIT

FEEDBACK

TRANS

MHV Output unit Block Diagram

BIAS Output Unit Block Diagram

REGULATION CIRCUIT

MHV

OPC

5-30

August 2001

WorkCentre Pro 412

Launch Issue

Circuit Description

5-5-7-4 MHV (Electrification Output Enable)

Electrification Output Enable is the electrification output control signal ’PWM-LOW ACTIVE’. When MHV-PWM LOW signal is received, Q401 turns on and the steady voltage will be accepted to the noninverting terminal of OP-AMP 324. As the voltage higher than the inverting reference voltage of OP-AMP, which is set to R405 and R406, OP-AMP output turns high. This output sends IB to the TRANS auxiliary wire through current-restricting resistance Q402 via R408 and C403 and Q402 turns on. When the current is accepted to Q402, Ic increases to the current proportional to time through the T401 primary coil, and when it reaches the Hfe limit of Q402, it will not retain the “on” state, but will turn to “off”. As Q402 turns 'off', TRANS N1 will have counter-electromotive force, discharge energy to the secondary unit, sends current to the load and outputs MHV voltage through the high voltage output enable, which is comprised of Regulation circuit.

MHV-PWM

U103 7407

R412 2.2K

R411 2K

18V

Q401 A708

R403 130K

R402 82K

R404 27K

C407 104

R405 220K

R406

2.2K

T401

24VS

Q402

R408 47K

D526

R409 390

C403 333

24VS

KA324

C404 3K/471

D402 4KV

C406 3K/471

R416 15M

R417 15M

MHV OUTPUT

R413 12M

ZD401 150V

OPC

5-5-7-5 BIAS (supply/dev/blade output unit)

BIAS (Electrification Output Enable) Electrification Output Enable is the electrification output control signal ‘PWM-LOW ACTIVE’.When BIAS-PWM LOW signa l is receiv ed, Q501 turns on a nd the stead y vol tage wil l be accepted to the non-inverti ng termi nal of OP-AM P 32 4. As the vo ltage hi gher than the inve rting refe rence vo ltage of OP-AMP, which is set to R506 and R507, OP-AMP output turns high. This output sends IB to the TRANS auxiliary wire through current-restricting resistance Q502 via R509 and C504 and Q502 turns on. When the current is accepted to Q502, Ic increases to the current proportional to time through the T201 primary coil, and when it reaches the Hfe limit of Q502, it will not retain the “on” state, but will turn to “off”. As Q502 turns ‘off’, TRANS N1 will have counter-electromotive force, discharge energy to the secondary unit, sends current to the load and outputs DEV voltage through the high voltage output enable, which is comprised of Regulation-circuit.

R520

R501

26K

U103-A 7407

100

R519

2.2K

R502 2K

BIAS-PWM

CON03-#24

WorkCentre Pro 412 Launch Issue

Q501 A708-Y

R503 100KF

R504

56.6KF

C501 104

C502 222

R506

86.6KF

R507 12KF

C503 104

R508 47K

U101-B KA324

August 2001

R509 47K

C504 333

R510 430

Q502 D526-Y

24VS

T201 KAB-007

R511 1W 3

C505 2KV 680

D502 4KV

C506 3KV 471

ZD501 100V

R512 MGR1/2W 12MF

R514 MGR1/2W 50K

R515 MGR1/2W 50K

ZD501 100V

R516 MGR1/2W 50K

BLADE

SUPPLY

DEV

5-31

Circuit Description

5-5-7-6. THV(THV(+)/THV(-) Output Unit)

Transfer(+) output unit is the transfer output control signal ’PWM-LOW ACTIVE’. When THV-PWM LOW signal is received, Q203 turns on and the steady voltage will be accepted to the noninverting terminal of OP-AMP 324. As the voltage is higher than the inverting reference voltage of OP-AMP, OP-AMP output turns high. The 24V power adjusts the electric potential to ZD201 and ZD202, sends IB to TRANS auxiliary wire through current-restricting resis tanc e R215 via R212 and C204, and ev entually Q204 will turn on . Whe n the current is accepted to Q402, Ic increases to the current proportional to time through the T201 primary coil, and when it reaches the Hfe limit of Q204, it will not reta in the “on” state, but will turn to “off”. As Q402 turns 'of f', TRANS N1 will have counter-electromotive force, discharge energy to the secondary coil, sends current to the load and outputs THV voltage through the high voltage output enable, which is comprised of Regulation– circuit. The output voltage is determined by the DUTY width. Q203 switches with PWM DUTY cycle to fluctuate the output by fluctuating the OP-AMP non-inverting end VREF electric potential, and the maximum is output at 0% and the minimum, at 100%.Transfer(-) output unit is THV-EA 'L' enable. When THV-EA is 'L', Q302 turns on and the VCE electric potential of Q302 will be formed and sends IB to TRANS auxiliary wire through R3 11, C305 and VR302 via current-rest rict ing resi stance R314, and eventually Q303 will turn on. When the current is accepted to Q303, Q303's Ic increases to the current proportional to time through the T301 primary coil, and when it reaches the Hfe limit of Q303, it will not retain the “on” state, but will turn to “off”. As Q303 turns 'off', TR ANS N1 will have co unter-el ectrom otive forc e, discharge energy to the secondary coil, send current to load and output THV(-) voltage through the high voltage output enable, which is comprised of Regulation circui t.

#7 TEV-PWM

#17

#19

TEV-EA

#24

TEV-READ

24VS

C101 35V47

R201 10K

R205

1.8K

18V

R206 100

R208

Q203

30K

A708Y

R209

100KF R207 2K

7407

D-GND

24VS

KA324

R301 470K

C301 222

VR201

50K

C202

C201

121

103

C4 103

R302

R303

33K

100KF

C302 102

R210 845KF

D301 1N4148

D302 1N4148

D201 1N4148

D202 1N4148

C303 103

R211 1MF

R304 389KF

R305 10KF

VR301 5K

24VS

R212 680K

R306

26.1KF

C304 500V103Z

T201 KAB-007

KA324

C203 472

R213

2.2K

D203

ZD201

ZD202

1N4148

5.65V

705V

18V

R309 202K

Q301

R307 33K

R308 33K

A708Y

18V

R310

2.2K Q302 A708Y

R311 100KF

C204

R214

333Z

2.2K

R312 1W56

R313 1W56

Q303 D526

VR302 2K

C305 333Z

Q204

D526

4 R215 390

KAB-006 T301

R314

1.7K

C206 6KV470pF

C205 2KV68pF

C307 3KW470pF

D303

C306

4KV

2KV68pF

R216 SBR306

D304 4KV

D204 6KV

C207 3KV470pF

C308 3KV470pF

C208 6KV

D205 6KV

R217 SBR207

D206 6KV

C209 6KV

R218 MGR1/2W100KF

R315 SBR306

D207 6KV

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Circuit Description

5-5-7-7. Environment Recognition

THV voltage recognizes chang es in tran sfer rol ler envi ronmen t and all ows the v oltage s uitabl e for the en vironment in order to realize optimum image output. The analog input is converted to digital output by the comparator that recognizes the environmental changes of the transfer roller. It is to allow the right transfer voltage to perform appropriate environmental response considering the environment and the type of paper depending on this digital output by the programs that can be input to the engine controller ROM.

This environment recognition setting is organized as follows: First, set the THV(+) standard voltage. Allow 200M¾ load to transfer output, enable output and set the standard voltage 800V using VR201. Then set 56 (CPU's recognition index va lue ) as the stan dard usin g VR302. This standard v alue with C PU makes s ure that the current feedback is 4µA when output voltage is 800V and load is 200M¾.If the load shows dif fe r ent resis tan ce v alu e when 800V is outp ut, the curre nt fee dba ck will al so be different and thus the index value will also be different. according to the index value read by CPU, the transfer voltage output will differ according to the preset transfer table. The changes in transfer output required by each load is cont rol led by PWM-DUTY.

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Circuit Description

5-6 OPE PBA

5-6-1 SUMMARY

OPE Board is separated functionally from the main board and operated by the micom(Z8601) in the board. OPE and the main use UART (universal asynchronous receiver/transmitter) channel to exchange information. O PE re set can be controlled by t he m ai n. O PE mi co m c ontr ols ke y-s ca nni ng and LCD and LED display. If there occurs an event in OPE (such as key touch), it sends specific codes to the main to respond to the situation and the main analyzes these codes and operates the system. For example, it the main is to display messages in OPE, the main transmits data through UART line to OPE according to the designated format and O PE displays t his on LCD, LED. O PE’s sen sing is als o transmitted to the main through UART line and then the main drives necessary operation.

OPE PBA consists of U1(MICOM, Z8601),LCD, key matrix, LED indicators. Refer to OPE Schematic Diagram and Wiring Diagram sections of this manual.

• Signals from the key matrix are delivered to U1 input pin group (D1 to D6)

• U1 pin 48 (TX DATA) is the UART code sent to MAIN PBA.

• Display from the controller is received at U1 pin 5(RX DATA).

• LCD drive signals are sent from U1 P2-x pin group, P3-4 to P3-6 pins.

• Machine status LED drive signals are sent from U1 LED0 to LED7.

Connector

UART2

Reset

MICOM Z8601

OPE BLOCK DIAGRAM

RESONATOR

7.37 MHz

LCD 16u 2line

Key Matrix

LEDs

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Circuit Description

5-7 LIU PBA

5-7-1. SUMMARY

LIU WIRE CONNECTS Main B’D’s MODEM AND LINE PARTS, AND IMPEDANCE MATCHING (AC, DC), RING DETECTION PART and LINE SEIZURE (DIALER).

5-7-2. DC MATCHING PART

Normal movement range of LIU is 12mA to 9mA. Adapting CTR21 standard, the regulation limits to 60mA CURRENT flow through the terminal. Therefore, select (*:for EU PIT) Option to connect necessary items then the current through LIU will not exceed 60mA.

• CTR21 Standard (Europe): 12mA~60mA • OTHER Standard (U.S.): 12mA to 90mA DC has a character to pa ss through the LINE. And with Q1 (VN2410) GATE section’s LINE INPUT c urrent and Q1 Source connection to R20, can be decided as follows:

• -VDCR = VL1 + ILINE X R20. (VDCR: Tip-Ring CD Voltage, ILINE: Current flow)VL1:Line Input Voltage, VL1 = VBD1+VCE(Q2)+VDS(Q1).

5-7-3. AC MATCHING PART

Basic LIU’s AC IMPEDANCE is 600 and uses R47. 48. C36 to possibly control combined IMPEDANCE.

• U.S. Usage: A terminal IMPEDANCE Æ 600W(±30%).

• CTR21: A Terminal IMPEDANCE Æ 270+750W//150nF.

5-7-4. DIALER PART

*MF DIAL

DTMF Dialing is controlled by MODEM and should be se lected by appro priate LEVEL and On-of f T ime ou tput based on each countries’ own National specification.

• Frequency Tolerance: ±1.5%.

High Group: 1209, 1336, 1477, 1633Hz. Low Group: 697, 770, 852, 941 Hz.

U.S. Usag e CTR21

High Frequency Level -9.0+2.0/-2.5 -7.0 +1.0/-2.0

Low Frequency Level -9.0+1.0/-2.0 -11.0+2.5/-2.0

*DP DIAL

Controls from MAIN through / DP-Terminal. for U.S.Usage, set time to DF signal of 40:60 M/B. DP signal is made of U6 (pcb817). The DC current which flows through Q2 Base is regulated by On/Off switch and turns to DP dial signal with a COUPLER.

• CTR 21 does not have telephone capability but has the number 3 and 4 Line Connection. No DP condition

but possibility to get approval only on DTMF Dial based terminal.

5-7-5. RING DETECTION PART

RING SIGNALS from the LINE section (TIP, RING) are further passed through C5, R3, ZD1, and ZD2 and ends up at U9, (PC 814). U9 then detects abov e RING SIGNAL and passes the ou tput to MAIN B’D. The wire diagram’s C5 is RINGER CAPACITOR and it normally uses 1UF/250V.

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Circuit Description

A R3 limits AC current and controls upper and lower REN meter.

5-8 SMPS (Switching Mode Power Supply) Unit.

5-8-1 SMPS Specifications

There are no user-serviceable parts inside the SMPS unit. The SMPS (Switching Mode Power Supply) unit used here is a PWM (Pulse Width Modulation) type power

supply unit that supplies DC+5V to controller and control panel, and DC+5V, DC+24V and DC+12V to the engine. It also supplies AC power to fixer heat lamp.

1 2 3

Output Channel Ch.1 Ch.2 Ch.3

Channel name +5.1V +24.0V +12.0V Rated output voltage +5.1V +24.0V +12.0V Rate output current 2A 2.5A 1.0A Maximum load current

3A continuous 3.5A continuous 1.0A continuous and load pattern

Load change range 0.5~2.0A 0.3~2.5A 0.2~1.0A

Rate output voltage

(For rated I/O)

+5.1V±5%

(+4.84 to +5.35V)

+24.0V±10% (+21.60 to +26.40V)

1) Total output voltage deviation (Input, load, temp., aging)

2) Dynamic input change

Including all

+5.1V±5%

(+4.84 to +5.35V)

including set error

Including all +24.0V±10% (+21.60 to +26.40V) including set error

3) Dynamic load change

+12V±5% (+11.40 to +12.60V)

Including all +12V±5% (+11.40 to +12.60V) including set error

5-36

Refer to ripple & noise

27)

150mVp-p or less 500mVp-p or

less

August 2001

150mVp-p or less

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Circuit Description

5-8-2 AC Input Stage

AC input power path is consist of the fuse (F501) for AC current limit, the Varistor (TNR501) for by-passing high voltage surge, the discharge resistor(R508), the AC impulse noise filtering circuit (C501, LF501, C503), the common mode grounding circuit (C504, C505), the second noise filter (LF502), and the thermistor (TH501). When power is turned on, TH 501 li mits i nrush curren t by it’s high resistance, and when it’s t emperat ure ri ses, it’s resistance reduces to approximately zero ohms.

5-8-3 SMC (Switched Mode Control)

The AC input voltage is rec tifi ed an d fil tere d by BD5 52 an d C50 7 to c r eate the DC hi gh v olta ge a ppli ed t o the primary winding of T501. TR01 pin #1 is driven by the SMPS device U502. U502. auto-starts and chops the DC voltage. The U502 is PWM SMPS IC and has internally a SMC (switched mode control) IC and a MOSFET output stage. The SMC IC ha s a Auto-restar t with out a Power Suppl y for the IC and a Therma l Shutd own function and so on. C509, R512, C510, D505 clamp leading-edge voltage spikes caused by transformer leakage inductance. The power secondary winding (pin # 11-12) is rectified and filtered by D507, C552, L551, and C554 to create the 5V output voltage. The bias winding (pin # 4-5) is rectified and filtered by D506 and C511 to create U502 bias voltage. The secondary output 5V is regulated through the path of the voltage divide by R553, R556U503 switching PC252-the bias v olta ge of U 50 2-U 503 PWM dut y cy cl e-T50 1 sec on dary vol tage . C5 08 fil ters internal pin, determines the auto-restart frequency, and together with R506, compensates the control loop. U552 of the secondary stage -12V is the Low Power-loss Regulator with built-in over-current protection function.

5-8-4. Fixed Temperature Control

5-8-4-1. Fixed Lamp Control Circuit

AC Neutral

C502

CON502

R502

R503

THY501

Fixed Lamp Control Circuit

AC Power Live

L501

Zero crossing circuit

U501

Logic Unit Fuser On

R505

SMPS Unit DC Power

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Circuit Description

5-8-4-2. The Concept of Fixed Lamp Control

For fixed lamp control, t he logi c unit “fuser on ” contro l signal a nd SMPS un it DC p ower mus t be su pplied . This circuit turns on only when “fuser on” sends the signal and the DC power is supplied. The following explains how the fixed lamp control circuit works. Logic unit “fuser on” sends trigger current to triac driver U501 LED, then the infrared ray is detected by U501 photo detector. Next, U501 triac is conducted. The conducted current sends trigger input to triac THY501 gate. At this point, THY501 is conducted and AC power is supplied to fixed lamp. Lamp is turned on and temperature rises. As this fixed lamp control circuit uses the AC voltage (“+” and “-” are repeated) as the power supply, it used two-way triac (THY501), which has advantage over one-way SCR considering the price, size and reliability. Triac's gate can be triggered by either forward or reverse signal. Once triac is turned on, it will not be controlled by gate signal, but will be continuously on until the current between major terminals decreases below the holding current. In other words, you cannot turn it off with reverse signal unlike SCR. This property is called current-voltage threshold rise rate (commutation: dv/dt). In AC power control application, triac has to turn off conduction in each zero crossing or switch it twice in each cycle. This switching operation is called com mutati on. It is possi ble t o turn of f the triac at the end of ha lf cycl e by elim inati ng the gate signal when the load current (IL) is gained at the level equal to or lower than holding curre nt. Whe n triac commutes off- lin e, the dire ction of the voltage of the both ends of tria c w ill be rev ers ed and i ncrease up to the maximum value of line voltage (VAC). At this point, the width of rise rate will be determined by dv/dt and overshoot voltage, by the circui t. When triac com mutes of f-line, the voltage of both ends of triac w ill have the sa me voltage as the line voltage.

Inductive I

Inductive Circuit

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Disassembly and Reassem bl y

6. Disassembly and Reassembly

6-1 General Precautions on Disassembly

WARNING

When you disassemble and reassemble c omponents, you must us e extreme ca re. The close p roximity of cables to moving parts makes pr oper rout ing essenti al. If compon ents are r emoved, a ny cables disturbed by the procedure must be restored as close as possible to their original positions. Before removing any component from the machine, note the cable rout ing that will be affected.

Whenever servicing the machine, you must perform as follows:

1. Check to verify that documents are not stored in memory.

2. Unplug the power cord.

3. Use a flat and clean surface.

4. Replace only with authorized components.

5. Do not use force to remove or install plastic components.

6. Make sure all components are correctly installed.

6-2 Rear Cover

1. Remove the six screws securing the rear cover .

2. Separate the rear cover from the base fra me and scanner assembly.

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6-1

Disassembly and Reassembly

6-3 Scanner Assembly

1. Before you remove the scanner assembly, you should remove:

- Rear cover (see page 6-3).

2. Remove the two screws, as shown below.

4. Unplug the two connectors and CCD cable.

CAUTION

You should disconnect the CCD cable vertically to avoid CCD cable pin damage.

3. Open the side cover assembly and front cover, as shown below.

Side Cover Ass’y

Front Cover

5. Pull up the scanner assembly in the direction of arrow.

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6. Remove the connector fr om the plat en asse mbly.

Disassembly and Reassem bl y

7. Pull the ADF assembly upward and remove it.

8. Remove the eight screws securing the platen assembly.

10. Unplug the one conne ctor and remo ve the OPE assembly.

9. Unlatch the scan upper assembly securing the glass and remove it.

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6-3

Disassembly and Reassembly

11. Remove the three screws and take out the glass from the cover scan upper assembly.

12. Remove the five screws and dummy scanner lower.

14. Pull up the shaft CCD and take out the scanner module.

Shaft CCD

Scanner Module

Pully

Belt

15. Remove three screws and take out the motor bracket.

13. Remove the CCD cable.

Dummy Scan Lower

16. Remove two screws and take out the platen PBA.

Platen PBA

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Disassembly and Reassem bl y

6-4 ADF Assembly

1. Before you remove the ADF assembly, you should remove:

- Rear cover (see page 6-3).

- Scanner assembly (see page 6-4).

2. Remove the five screws securing the platen cover and unlatch the AD F asse mbly by pus hing the part hooked the platen cover using a sharp tool.

Platen Cover Ass’y

3. Pull the ADF assembly upward and remove it.

Platen Cover Ass’y

4. Remove two screws and take out the ADF motor assembly.

ADF Motor Ass’y

Cover Side L

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6-5

Disassembly and Reassembly

6-5 OPE Assembly

1. Before you remove the OPE assembly, you should remove:

- Rear cover (see page 6-3).

- Scanner assembly (see page 6-4).

2. Pull the overlay upward and remove it.

Overlay

4. Remove the contact rubber from the unit.

3. Remove nine screws securing the OPE PBA to the OPE cover.

5. Remove the key pad from the unit.

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Disassembly and Reassem bl y

6-6 Side Cover Assembly

1. Remove the two screws to release the stopper securing the side cover to the main frame.

3. Unlatch the cover front securing the base frame and remove it.

2. Release the right-bottom of the cove r, then pull it the direction of arrow to release the other end.

4. Unlatch the MP tray securing the side cover assembly and remove it.

MP Tray

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6-7

Disassembly and Reassembly

5. Unlatch the duplex assembly securing the side cover assembly and remove it

6. Take out the exit roller, as shown below.

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Disassembly and Reassem bl y

6-7 Fuser Assembly

1. Before you remove the Fuser assembly, you should remove:

- Side cover assembly (see page 6-9).

2. Unplug the connector.

4. Remove the four screws and take out the thermostat.

5. Remove the two screws and take out the heat roller.

3. Remove the four screws and take out the fuser assembly.

6. Remove the halogen lamp from the heat roller.

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6-9

Disassembly and Reassembly

6-8 Exit Assembly

1. Before you remove exit assembly, you should remove:

- Rear cover (see page 6-3).

- Scanner assembly (see page 6-4).

- Side cover assembly (see page6-9).

2. Remove three screws and unlatch the exit assembly, as shown below.

3. Pull the exit assembly and remove it.

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Disassembly and Reassem bl y

6-9 Cover Paper Exit Assembly

1. Before you remove the cover paper exit assembly, you should remove:

- Rear cover (see page 6-3).

- Scanner assembly (see page 6-4).

- Side cover assembly (see page 6-9).

- Exit assembly (see page 6-12).

2. Remove four screws and take out the dummy base frame.

Dummy Base Frame

3. Remove two screws and cover paper exit assembly, as shown below.

Cover Paper Exit Ass’y

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6-11

Disassembly and Reassembly

6-10 Drive Assembly

1. Before you remove the drive assembly, you should remove:

- Rear cover (see page 6-3).

- Scanner assembly (see page 6-4).

- Side cover assembly (see page 69).

- Exit assembly (see page 6-12).

2. Unplug the all connectors.

3. Remove the five screws and take out the drive assembly.

4. Remove the one screw and take out the fan and dust fan.

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Disassembly and Reassem bl y

6-11 SMPS

1. Be fo re yo u rem ov e t he LS U , y ou sh ou ld re mo ve:

- Rear cover (see page 6-3).

- Scanner assembly (see page 6-4).

- Side cover assembly (see page 6-9).

- Exit assembly (see page 6-12).

2. Unplug the all connectors.

3. Remove the SMPS, as shown below.

6-12 LSU

1. Before you remove the LSU, you should remove:

- Rear cover (see page 6-3).

- Scanner assembly (see page 6-4).

- Side cover assembly (see page 6-9).

- Exit assembly (see page 6-12).

2. Unplug the two connectors.

3. Remove the four screws and take out the LSU.

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6-13

Disassembly and Reassembly

6-13 Main Frame Assembly

1. Before you remove the LSU, you should remove:

- Rear cover (see page 6-3).

- Scanner assembly (see page 6-4).

- Side cover assembly (see page 6-9).

- Exit assembly (see page 6-12).

- LSU (see page 6-15).

- SMPS (see page 6-15).

2. Unplug the all connectors.

3. Remove the six screws and take out the main frame assembly.

Main Frame Ass’y

6-14 Cover Exit Rear

1. Remove the one screw and cover exit rear, as shown below.

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Cover Exit Rear

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Disassembly and Reassem bl y

6-15 MP Assembly

1. Unplug the two connectors.

2. Remove the tw o scre ws and take out the dummy cover.

Dummy Cover

3. Pull the MP assembly upward and remove it.

MP Ass’y

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6-15

Disassembly and Reassembly

6-16 Feed Assembly

1. Remove the three screws.

6-17 Pick Up As sembly

1. Unplug the three connectors.

2. Pull the feed assembly upward and remove it.

Feed Ass’y

2. Remove the two screws an d take out the pick up assembly, as shown below.

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Pick-up Ass’y

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Disassembly and Reassem bl y

6-18 Main PBA

1. Remove the two screws and take out the shield main lower.

2. Remove the two screws and take out the main PBA from the shield main lower.

Main PBA

3. Unlatch the LIU PBA securing t he main PBA a nd remove it.

Main PBA

LIU PBA

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6-17

Disassembly and Reassembly

This page intentionally blank

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Maintenance & Troubleshooting

7. Maintenance & Troubleshooting

7-1 Preventative Maintenance

The cycle period outlined below is a general guideline for maintenance. The example list is for an average usage of 50 transmitted and received documents per day. Environmental conditions and actual use will vary these factors. The cycle period given below is for reference only.

COMPONENT REPLACEMENT CYCLE

ADF roller 20,00 pages

Feed roller 50,000 pages

Transfer 50,000 pages

Fuser 50,000 pages Toner CRU 6,000 pages Drum DRU 15,000 pages

7-2 Diagnostics

This section describes methods and procedures to isolate the cause of a malfunction in the machine. This machine display s diagnostic informati on on th e LC D . I n a ddi tion, it can perfor m a se ries o f t est s that allow the machine to observe individual machine functions.

7-2-1 Error Messages.

Error Message Description Solution

RETRY REDIAL? The machine is waiting for the

programmed interval to automatically re-dial.

COMM. ERROR A problem with the FAX commu-

nications has occurred.

DOCUMENT JAM Loaded document has jammed

in the feeder when document jam occurred at ADF module

DOOR OPEN The side cover is not securely

latched.

You can press STAR T to immediately re-dial, or STOP to cancel the re-dial operation.

Try again.

Clear the document Jam.

Close the cover until it clicks in place.

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7-1

Maintenance & Troubleshooting

Error Message Description Solution

GROUP NOT AVAILABLE

You have tried to select a group location where only a single

Try again, check location for

group. location number can be used, such as when adding locations for a multi-dial operation.

Error Message Description Solution

LINE ERROR Y our unit cannot connect with the

remote machine, or has lost contact because of a problem on the

Try again. If failure persists,

wait an hour or so for the line to

clear then try again. phone line.

LOAD DOCUMENT You have attempted to send a

FAX document with no document

Load a document and try

again. loaded.

MEMORY FULL The memory has become full. Either delete unnecessary doc-

uments, or re-transmit after

more memory becomes avail-

able, or split the transmission

into more than one operation.

NO ANSWER The remote machine did not

answer after all the re-dial attempts.

NO. NOT ASSIGNED

The speed dial location you tried to use has no number assigned to it.

Try again.

Make sure the remote machine

is OK.

Dial the number manually with

the keypad, or assign the num-

ber to the speed dial and try

again.

NO PAPER [ADD PAPER]

The paper has run out. The printer system stops.

Load new paper in the paper

tray.

OVERHEAT The printer has overheated. The machine will automatically

return to the standby mode

when it cools down to normal

operating temperature. If fail-

ure persists, install a new ELA

HOU-FUSER, PL 1-14.

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Maintenance & Troubleshooting

Error Message Description Solution

PAPER JAM 0 OPEN/CLOSE DOOR

PAPER JAM 1 OPEN/CLOSE DOOR

paper has jammed in paper feeding area. paper is jammed in pick-up unit

paper has jammed inside the unit. paper has jammed in paper exit unit.

TONER EMPTY The machine has encountered

the toner empty condition.

DRUM WARNING The machine has encountered

the drum life,14000 print pages.

Press STOP and clear the jam.

Clear the jam.

Install a new ELA -TONER

UNIT SET, PL 1-8

The drum is nearing the end of

it’s life.

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Maintenance & Troubleshooting

Error Message Description Solution

REPLACE DRUM When the machine has encoun-

tered the end of life, 15000 print pages.

NO CARTRIDGE The machine detected the toner

cartridge has not been installed.

BYPASS JAM The machine has detected no

The drum has reached the end

of it’s life, install a new ELA-

OPC UNIT SET, PL 1-7.

Check that the toner cartridge

is fully seated in the machine.

Clear the jam. feed from bypass Tray.

DUPLEX JAM The machine detected a duplex

Clear the jam. jam in the middle of machine.

LINE BUSY The remote FAX didn’t answer Try again.

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Maintenance & Troubleshooting

7-2-2 Test Mode

The test mode is used to test certain functions of the machine. The available tests are:

•User mode: Clean drum, Notify toner low

•tech mode: switch test, mod em tes t, SRAM test, DRAM test, ROM te st, Pattern tes t, Clear co unt, Answer O n

CNG, Adjust shading, Fl ash upgrade.

To enter the Tech Mode:

1. Enter the Tech mode by pressing Menu, #, 1, 9, 3, 4. The letter “T” will appear in the top right of the display.

2. In Tech mode, press Menu, ‘Maintenance [System]’ is displayed on the LCD.

3. Press the Select key

4. Scroll to the options by pressing Up and Down navigation key repeatedly until the correct selection is found.

5. Press the Select key to initiate the tech mode.

6. Perform step 1 to return to user mode.

• Cleaning DRUM

This procedure removes excess toner on the OPC drum.

1. Make sure that paper is loaded in the automatic feeder or document glass (platen).

2. Press Menu, -> Up or Down key -> Maintenance -> Select -> Up or Down key ->Clean Drum

3. Press ‘Select’.Th e machi ne automa ticall y feeds a sheet of pape r, and prints out. The excess toner on the OPC drum surface is fused to the paper.

• Notify Toner Low

With this feature enabled, when the toner becomes low, the toner low information will be sent to the specified contact point, for example, the service company. After you access this menu, select on, and when the LCD prompts, enter the name and the number of the contact point, the customer’s FAX number, the model name, and the serial number.

• Switch Test

This test checks the operation of the LCD display and the LED indicators that interface the switches on the operation panel.

• Modem Test

This test causes the machine to generate a particular frequency to verify the operation of the modem and it’s control circuits.

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7-5

Maintenance & Troubleshooting

• SRAM Test

This test is used for checking the Random Access Memory (RAM) on the main PBA. If all memory is working normally, the LCD shows TESTING OK!. When this testing is carried out, any picture data stored in memory is erased.

• ROM Test

This test mode will display and check the current ROM level in your machine.

FLASH VER.: 1.00 V

ENGINE VER: 1.00 V

• DRAM Test

This test checks the DRAM memory status and shows if it is functioning properly

• Pattern Test

1. Select Pattern Test.

2. There are 4 different pattern tests. Scroll to the options by pressing Up or Down repeatedly until you find

the correct selection.

3. Press Select key.

• ADJUST Shading

This procedure is needed to set (make) a new shading reference value. The reference value is preset at factory. However, when a new CCD or main board is installed, the reference value must be set again. Follow the next steps as instructed through the LCD window. After the shading value has just been set, the shading value pattern is automatically printed. The shading value pattern shows the value of the white reference level of the Conta ct Image Sen sor. Check for the waveform in the pattern. For bes t resul ts the w aveform should be level. If there are many points sharply broken, perform the adjust shading procedure several times until the waveform is level.

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Maintenance & Troubleshooting

7-2-3 Maintenance List

A number of reports can be printed from the FAX machine within the test m ode . Th e pr otoc ol li st and memory dump list all contain detailed information which may be required when contacting technical support.

To printout the protocol and memory dump lists:

1. Enter Tech mode by pressing Menu, #, 1, 9, 3, 4.

2. In Tech mode, press the Reports button, ‘Protocol Report’ will be displayed on the LCD.

3. Press Up or Down key repeatedly until you find ‘Reports Protocol’, press Select key. A sample of a proto-

col dump list will be printed.

Facsimile Information Field data described in hexdecmal code

Sending/Receiving

Name of signal (Facsimile Control Field)

FIF data described in ASCII code

PROTOCOL DUMP LIST MAR-20-1999 06:35

S/R FCF FIF DATA ASCII

S NSF 61005820003380140200001302090018010000 S CSI 2020202020202020202020202O20202020202020 S DIS 00000000 01110111 00010111 00100010 S NSF 61005020003380140200001302090018010000 S CSI 202020202020202020202022O202020220202020 S DIS 00000000 01110111 00010111 00100010

R TSI 2020202020202020202020202O20202020202020 R DCS 00000000 01100001 00010101 00000000 S FTT R TSI 2020202020202020202020202O20202020202020 R DCS 00000000 01100001 00010101 00000000 S CFR R MPS S MCF S DCN

7-2-4 Engine Test

The Engine test mode is used to check the operation of the components related the printer engine. In this mode, the tests are classified into six sections. The available tests are:

0: MOTOR Test, PTL Test, FAN Test, FUSER Test. 1: LSU MOTOR Test, LD ON Test, LSU OPERATION Test. 2: FEED Sensor Test, EXIT Sensor Test, COVER Sensor Test, 1st Cast Sensor Test, MP Sensor Test. 3: 1st Cast SOLENOID Test, MP SOLENOID Test, DUPLEX SOLENOID Test. 4: MHV Test, DEVBIAS Test, THV Test, THV NEG Test, THV TRIGGER TEST. 5: All components test.

To enter the Engine test mode:

1. Press Menu, #, 1, 9, 3, 1 in sequen ce .

2. When you see ‘ENGINE TEST?’, press Start ‘ENGINE TEST NO>O-5‘appears in LCD window.

3. Enter the number you want.

4. Scroll to the options by pressing Up or Down key repeatedly until you find the one you want.

5. Press Start to begin the test.

6. After the engine test is finished, press Stop to exit the engine test mode.

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7-7

Maintenance & Troubleshooting

7-2-5 Firmware Upgrade

1. Upgrade Local Machine.

• By using ControlCentre Application (Parallel & USB).

- Activate ControlCentre 5.0.

- Select Firmware Upgrade Window.

- Click Browse Icon to search the Upgrade Firmware.

- Click Upgrade Icon.

- The message “Upgrading Firm ware” will be displayed.

- Wait until the machine is initialised, this will happen automatically after completion of the upgrade.

- Click the Refresh icon when the machine has been initialized.

- The machine is now updated with New Firmware.

2. Upgrade the Remote Fax.

- Performed on the Local Machine in the Service Center.

- Go to the Tech Mode -Search for the Flash Upgrade in Maintenance Item, select REMOTE.

- Enter Remote Fax Number to be upgraded.

- Multiple remote FAXs can be upgraded sequentially if you enter the multiple FAX numbers.

- Select All Remote Fax Number if required.

- Confirm Input. - Machine will start dialing and send its own image codes to remote fax machine(s).

- It will take 10 to 15 minutes to send the image to each remote FAX machine.

- The Remote Fax machine will automatically program the received image on its flash memory.

- If ECM mode is off, or Received Me mory is not emp ty, or machine is being used, the remote upgrade will not be performed.

7-8

August 2001

WorkCentre Pro 412

Launch Issue

Maintenance & Troubleshooting

7-3 Scanner

7-3-1 Copy

PROBLEM ITEMS TO BE CHECKED. HOW TO SOLVE

White copy • Check the scan-cover is not

open.

• Check shading profile. • Remake shading profile in the

• Check white/black reference

voltage in Main PBA.

• Check the CCD lamp is on when scanning.

Black copy • Check for CCD problem in Main

PBA.

• Ambient light can cause image problems

Tech mode.

• Replace Main PBA if it is defective.

- U16-97 = 3.3V - U16-98 =

3.3V

- U16-99 = 1.5V

• If the CCD is defective, replace

it.

- CN3-19 is 5.8V when white

original copying for R, B and

3.5V for G.

• Check the CCD harness con-

tacts.

Defective image quality

WorkCentre Pro 412 Launch Issue

• Check shading profile. • Remake shading profile in the Tech mode.

• Check the CCD problem in Main

PBA.

• If the CCD is defective, install a new ELEC/MECH-SCANNER MODULE, PL 2-2-21.

- Cn3-19 is 7.3V when idle for R, B, and 5V for G.

• Check shading profile. • Remake shading profile in the

Tech mode.

• Check the gap between original

and scanner glass.

• A gap greater than 0.5mm can

cause a blurred image.

• Check printing quality. • See “Print” troubleshooting.

August 2001

7-9

Maintenance & Troubleshooting

PROBLEM ITEMS TO BE CHECKED. HOW TO SOLVE

Abnormal noise • Check the scanner glass and

any mechanical disturbance.

• Check the motor driver in Driver

PBA.

• Check the scanner glass is cor-

rectly located and clean, check that the CCD carriage moves smoothly.

• If any driver is defective,

replace the main PBA.

- U55 or U55-1, 15 = 0V to 24V

swing signal when operating.

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August 2001

WorkCentre Pro 412

Launch Issue

Maintenance & Troubleshooting

7-3-2 PC-Scan

PROBLEM ITEMS TO BE CHECKED. HOW TO SOLVE

Scanning error • Check the printer cable. • Check correct installation, and

use standard IEEE1284 cable.

Defective image quality

• Check how TWAIN driver is

installed.

• Remove any other scanner driver.

• Reboot after reinstallation of

the TWAIN driver.

• Check harness contact. • Check CN14 contact in Main

PBA

• Check the IEEE1284 signal

level.

• If any signal level is defective,

install a new Main PBA.

- U36-66~74 in Main PBA = 0.8V

to 2.4V TTL signal.

• If necessary, install a new PBA

MAIN MAIN, PL 1-19

• Check shading profile. • Remake shading profile in the

Tech mode.

• Check the gap between original

and scanner glass.

• A gap greater than 0.5mm can

cause a blurred image.

Abnormal noise • Check the scanner glass and

any mechanical disturbance.

• Check the motor driver in Driver

PBA.

WorkCentre Pro 412 Launch Issue

August 2001

• Check the scanner glass is cor-

rectly located and clean, check that the CCD carriage moves smoothly.

• If any driver is defective,

replace the Main PBA.

- U55 or U56-19 = 0V to 24V

swing signal when operating.

7-11

Maintenance & Troubleshooting

7-4 FAX

7-4-1 FAX/Telephone Precautions

PROBLEM ITEMS TO BE CHECKED. HOW TO SOLVE

TEL LINE CAN-

• When you press the “OHD” key:

NOT BE ENGAGED (NO DIAL TONE)

a) Check line cord connection. b) Check MAIN LIU harness, and

CN1(LIU PBA).

c) Check relay operation of LIU

PBA: Is the control signal of CN20-7(main) low?

Cannot MF dial • Check CN20 (main PBA), main-

LIU harness, and CN1 (LIU PBA)

MF dial is possible but not DP dial.

• Check DP control signal of

CN20-1 1 of MAIN PBA and the circuit around R15. U6 and Q2 of LIU PBA.

Defective FAX transmission

• Check CN20 (main PBA), main

LIU harness, and CN1(LIU PBA).

• Is the external phone off the

hook?

• Check ‘hook off’: Refer to ‘TEL

LINE CANNOT BE ENGAGED’ above.

• Check the control signals of

CN20-11.

• Check transmission path:

Check output of CN20-3.4 and T2-4(LIU PBA).

• Check reception path: Check

output CN1-1 (LIU PBA) and input of CN20-1(main PBA).

a) Insert plug into the socket

named “line”. b) Replace defective parts. c) Replace main PBA IF the con-

trol signal of CN20-7(main) is

high. Replace LIU PBA if high but

phone line cannot be con-

nected.

• Replace defective parts.

• Replace LIU PBA.

• Replace defective parts.

• Replace LIU PBA if low.

• Refer to ‘TEL LINE CANNOT

BE ENGAGED’ above.

• Replace main PBA, if the sig-

nals of CN8-11 (MAIN PBA) is

low.

• Replace main PBA, if abnor-

mal.

• Replace LIU PBA if CN1-1(LIU

PBA) is not confirmed. Replace main PBA if CN20-

1(MAIN PBA) is not confirmed.

Defective automatic FAX reception

7-12

• Is the ring checked? Check ring pattern at CN1-9

(LIU PBA).

• Refer to ‘Defective FAX Transmission.’

August 2001

• Replace LIU PBA if it cannot be checked.

• Refer to ‘Defective FAX Transmission’.

WorkCentre Pro 412

Launch Issue

Maintenance & Troubleshooting

7-5 Print Quality

Error Status Check Solution

Vertical black line and band.

Vertical white

line.

1. Bad blade in toner cartridge.

2. LSU.

1. LSU window contamination.

2. Toner cartridge.

No image. 1. Has the seal tape been

removed?

2. Is the GND OPC well grounded?

3. LSU running well?

4. Is the bias voltage normal?

5. Low toner?

6. Is there video data from Main PBA

1. Install a new toner cartridge.

2. Install a new LSU.

1. Clean LSU window.

2. If not LSU contamination, install a new toner cartridge.

1. Remove the seal tape.

2. Measure the resistance between. frame ground and the ground spring attached to the frame. If necessary clean the components to achieve a good earth.

3. Adjust LSU or install a new LSI.

4. Normal Dev bias = -350V.

5. If necessary install a new toner cartridge.

6. Test engine test pattern, if necessary, install a new Main PBA

Light image. 1. Has the seal tape been

removed?

2. LSU light power normal?

3. Enough toner?

4. High charger voltage?

5. Lower bias voltage

6. Contamination of high voltage contact

7. Transfer voltage and roller.

Dark image. 1. LSU light power normal?

2. Bias voltage output is high?

3. Video data is always supplied?

1. Remove the seal tape

2. LSU light power check is difficult.

Compare with new one and

check.

3. Check toner and developer counter

4 and 5. Check all high voltage

outputs

6. Leakage of toner cause bad contacts and increases contact resistance. Clean the contaminated area.

1. Check the rated level and replace.

2. Set to correct voltage.

3. Replace defected board.

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Maintenance & Troubleshooting

Error Status Check Solution

Background. 1. High voltage output is normal?

2. C/R of toner cartridge is contaminated?

Ghost. 1. High voltage output.

2. Pre-transfer lamp.

3. Bad high voltage contact.

1. Set to correct voltage.

2. Install a new toner cartridge.

1. Check all high voltage outputs.

2. Check the operation of the pre-transfer lamp.

3. Clean the contaminated contact.

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August 2001

WorkCentre Pro 412

Launch Issue

Error Status Check Solution

Maintenance & Troubleshooting

Stains on back of paper

1. Contamination of transfer roller

2. Stains of paper path

3. Pressure roller’s contamination

Poor Fusing 1. Check the paper quality.

2. Check fusing temperature.

3. The machine has been in a low temperature for a long period of time?

Partial blank image (not peri-

1. Toner is low?

2. The toner cartridge is out of position?

odic) Partial blank

image (periodic)

1. Damaged developer unit

2. Defect repeated every 94 mm.

3. Defect repeated every 47 mm.

1. Clean the transfer roller with vacuum cleaner

2. Clean the area of paper path with cloth or air cleaner.

3. Install a new fuser.

1. Try alternative paper.

2. Check engine controller board. Measure the thermistor voltage to CPU,

2.62V±5% will be measured if the system is working correctly. Check the thermistor contact and thermistor.

3. Re-check the fusing after placing the machine in a warm place for an hour or more.

1. Install a new toner cartridge.

2. Ensure the toner cartridge is correctly installed.

1 and 2. Install a new toner cartridge.

3. Install a new transfer roller.

Different image density (left and right)

1. Charge roller’s pressure is uneven along it’s length.

2. Dev. roller and OPC or Dev. roller and blade’s pressure is uneven along it’s

1 and 2. Install a new toner cartridge

3. Check left and right spring of transfer roller and the developer spring inside the unit.

length.

3. Transfer roller’s pressure is uneven along it’s length.

Horizontal band

1. Poor high voltage contact.

2. Charge roller contamination.

3. Heat roller contamination.

4. Malfunction of LSU.

1. Clean each contact and check good contact.

2. Clean charge roller.

3. Install a new fuser.

4. Check Main PBA.

NO Roller Abnormal image period Kind of abnormal image

1 OPC drum 94.29mm White spot

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August 2001

7-15

Maintenance & Troubleshooting

NO Roller Abnormal image period Kind of abnormal image

2 Charge roller 31.68mm Black spot 3 Supply roller 42.70mm Horizontal density band 4 Developer

56.52mm Horizontal density band

roller

5 Transfer roller 57.78mm Black side contamination/transfer

fault 6 Heat roller 82.89mm Black spot, White spot 7 Pressure roller 69.08mm Black side contamination

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August 2001

7-16

No Image

Maintenance & Troubleshooting

WorkCentre Pro 412 Launch Issue

August 2001

7-17

Maintenance & Troubleshooting

7-18

August 2001

WorkCentre Pro 412

Launch Issue

Xerox WorkCentre Pro 412 Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Table of Contents

1. Introduction

1-1 Organisation

1-2 Warnings, Cautions and Notes

1-3 Safety Procedures and Information

1-4 Heath and Safety Incident Reporting

1-5 Translation of Warnings and Precautions

2. Service Call Procedures

SCP 1 Initial Actions

SCP 2 First Call Actions

SCP 3 Normal Call Actions

SCP 4 Fault Analysis

SCP 5 Final Actions

3. Precautions

4. Specifications

4-1 Printer

4-2 Facsimile

4-3 Scanner

4-4 Copier

4-5 Power Supply

4-6 Dimension

4-7 Packaging

4-8 Environmental Condition

4-9 Machine Life

5. Circuit Description

5-1 Main PBA

5-2 Circuit Operation

5-3 Scanner

5-4 Host Interface

5-5 Engine Controller

5-6 OPE PBA

5-7 LIU PBA

5-8 SMPS (Switching Mode Power Supply) Unit.

6. Disassembly and Reassembly

6-1 General Precautions on Disassembly

6-2 Rear Cover

6-3 Scanner Assembly

6-4 ADF Assembly

6-5 OPE Assembly

6-6 Side Cover Assembly

6-7 Fuser Assembly

6-8 Exit Assembly

6-9 Cover Paper Exit Assembly

6-10 Drive Assembly

6-11 SMPS

6-12 LSU

6-13 Main Frame Assembly

6-14 Cover Exit Rear

6-15 MP Assembly

6-16 Feed Assembly

6-17 Pick Up As sembly

6-18 Main PBA

7. Maintenance & Troubleshooting

7-1 Preventative Maintenance

7-2 Diagnostics

7-3 Scanner

7-4 FAX

7-5 Print Quality