5024, serwisówki drukarek i kopiarek

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Revised:March 24, 2006
Lexmark™ C720
Color Laser Printer
Machine Type 5024-001
• Table of Contents
•Start Diagnostics
• Safety and Notices
• Trademarks
•Index
Lexmark and Lexmark with diamond
design are trademarks of Lexmark
International, Inc., registered in the
United States and/or other countries.
5024-001
Edition: March 24, 2006
The following paragraph does not apply to any country where such provisions are
inconsistent with local law
: LEXMARK INTERNATIONAL, INC. PROVIDES THIS
PUBLICATION “AS IS” WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS OR
IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Some states do
not allow disclaimer of express or implied warranties in certain transactions; therefore, this
statement may not apply to you.
This publication could include technical inaccuracies or typographical errors. Changes are
periodically made to the information herein; these changes will be incorporated in later
editions. Improvements or changes in the products or the programs described may be
made at any time.
Comments may be addressed to Lexmark International, Inc., Department D22A/032-2,
740 West New Circle Road, Lexington, Kentucky 40550, U.S.A or e-mail at
ServiceInfoAndTraining@Lexmark.com. Lexmark may use or distribute any of the
information you supply in any way it believes appropriate without incurring any obligation
to you.
Lexmark, Lexmark with diamond design, MarkNet, and MarkVision are trademarks of
Lexmark International, Inc., registered in the United States and/or other countries.
PCL is a registered trademark of the Hewlett-Packard Company.
PostScript is a registered trademark of Adobe Systems Incorporated.
Other trademarks are the property of their respective owners.
© Copyright Lexmark International, Inc. 2001, 2002.
All rights reserved.
UNITED STATES GOVERNMENT RESTRICTED RIGHTS
This software and documentation are provided with RESTRICTED RIGHTS. Use,
duplication or disclosure by the Government is subject to restrictions as set forth in
subparagraph (c)(1)(ii) of the Rights in Technical Data and Computer Software clause at
DFARS 252.227-7013 and in applicable FAR provisions: Lexmark International, Inc.,
Lexington, KY 40550.
U.S.A. P/N: 12G3667
5024-001
Table of Contents
Notices and Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . 1-xiii
Laser Notices
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-xiii
Safety Information
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-xxiv
Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-xxx
General Information
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Maintenance Approach
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Tools Required for Service
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Serial Number
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Acronyms
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Standard Features
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Printer (Main)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Printer Options
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11
Printer Identification
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-12
Options Identification
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13
Printer Theory of Operation
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14
Printer Systems Description
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15
Basic Principles of Color Printing
. . . . . . . . . . . . . . . . . . . . . . . . 1-15
Mechanical and Electrical Structures
. . . . . . . . . . . . . . . . . . . . . 1-15
Printer Component Systems
. . . . . . . . . . . . . . . . . . . . . . . . . . . 1-17
Basic Process of Color Printing
. . . . . . . . . . . . . . . . . . . . . . . . . 1-18
Print System and Transfer System
. . . . . . . . . . . . . . . . . . . . . . 1-19
Structure of OPC Belt (Photo Developer Cartridge)
. . . . . . . . . . 1-20
Basic Structure of the Print System
. . . . . . . . . . . . . . . . . . . . . . 1-21
Details of the Print System
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-23
Charging Process
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-23
Exposing Process
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-25
Developing Process
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-26
First Transfer (Drum) Process
. . . . . . . . . . . . . . . . . . . . . . . . . . 1-28
Belt Discharge (Erase Lamp) Process
. . . . . . . . . . . . . . . . . . . . 1-30
Belt Cleaning Process
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-31
Details of the Transfer System
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-32
Second Transfer (Paper) Process
. . . . . . . . . . . . . . . . . . . . . . . 1-32
Paper Discharging Process
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-33
Drum Cleaner Process
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-34
Details of the Optical System
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-35
Details of the Paper Transportation System
. . . . . . . . . . . . . . . . . . 1-37
Fusing Unit
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-39
Fusing Process
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-41
iii
 5024-001
Control System Structure
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-42
Electrical System and Function
. . . . . . . . . . . . . . . . . . . . . . . . . .1-42
Control of Print Process
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-43
Print Sequence Diagram
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-44
Laser Drive Control Circuit
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-45
Interface Control
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-47
Lower Feed Unit Theory of Operation
. . . . . . . . . . . . . . . . . . . . . . .1-48
Duplex Theory of Operation
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-49
Diagnostic Information
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1
Start
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1
Service Error Codes
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-2
Operator Messages
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-9
Paper Jam Messages
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-27
Symptom Tables
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-32
Printer Symptom Table
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-32
Print Quality Symptom Table
. . . . . . . . . . . . . . . . . . . . . . . . . . .2-34
Optional Lower Feed Unit Symptom Table
. . . . . . . . . . . . . . . .2-36
Optional Duplex Unit Symptom Table
. . . . . . . . . . . . . . . . . . . .2-37
Printer Service Checks
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-38
901—Yellow Developer Clutch Service Check
. . . . . . . . . . . . .2-38
902—Magenta Developer Clutch Service Check
. . . . . . . . . . . .2-39
903—Cyan Developer Clutch Service Check
. . . . . . . . . . . . . . .2-40
904—Black Developer Clutch Service Check
. . . . . . . . . . . . . .2-41
905—Yellow/Black Developer Solenoid Service Check
. . . . . . .2-42
906—Magenta/Cyan Developer Solenoid Service Check
. . . . .2-43
907—Toner Empty Sensor P.W.B. Board Service Check
. . . . .2-44
910—Developer Motor (DM) Drive Service Check
. . . . . . . . . . .2-45
911—Main Motor (MM) Service Check
. . . . . . . . . . . . . . . . . . .2-47
915—Control Cooling Fan Service Check
. . . . . . . . . . . . . . . . .2-50
916—Ozone Fan Service Check
. . . . . . . . . . . . . . . . . . . . . . . .2-51
917—Fuser Heater Fan Service Check
. . . . . . . . . . . . . . . . . . .2-52
918—Erase Lamp Service Check
. . . . . . . . . . . . . . . . . . . . . . .2-53
920, 922, 923—Fuser Unit Service Check
. . . . . . . . . . . . . . . . .2-54
921—Fuser Thermistor Service Check
. . . . . . . . . . . . . . . . . . .2-55
981—Duplex Motor (DPM1, DPM2) Service Check
. . . . . . . . . .2-56
982—Duplex Upper Solenoid (DSOL-U) Service Check
. . . . . .2-58
983— Duplex Fan (D-FAN) Service Check
. . . . . . . . . . . . . . . .2-59
984—Duplex Lower Solenoid (DSOL-L) Service Check
. . . . . .2-60
990—Transfer Drum Encoder Sensor (HPSEN) Service Check
2-61
991—Transfer Roller Cam Clutch (TRCM) Service Check
. . . .2-63
992—Drum Cleaner Brush Cam Clutch (FBCM) Service Check
2-64
993—Cleaner Clutch (FBCL) Service Check
. . . . . . . . . . . . . . .2-65
iv
Service Manual
5024-001
994—Fuser Clutch (FUCL) Service Check
. . . . . . . . . . . . . . . . 2-66
995—OPC Belt Cartridge, Belt Marker Sensor (PBS)
Service Check
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-67
997—High Voltage Power Supply Unit (HVU) Service Check
. 2-69
OPC Belt (Photo Developer) Cartridge Drive Service Check
. . 2-70
Operator Panel Service Check
. . . . . . . . . . . . . . . . . . . . . . . . . . 2-70
Options No Power Service Check
. . . . . . . . . . . . . . . . . . . . . . . 2-72
Paper Discharge Service Check
. . . . . . . . . . . . . . . . . . . . . . . . 2-73
Printer No Power Service Check
. . . . . . . . . . . . . . . . . . . . . . . . 2-74
Toner Feed Service Check
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-75
Waste Toner Feed Service Check
. . . . . . . . . . . . . . . . . . . . . . 2-76
Paper Feed Service Checks
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-77
Printer Paper Feed Service Check
. . . . . . . . . . . . . . . . . . . . . . 2-77
Lower Feed Unit Paper Feed Service Check
. . . . . . . . . . . . . . 2-79
Duplex Paper Feed Service Check
. . . . . . . . . . . . . . . . . . . . . . 2-81
Print Quality Service Checks
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-83
Background Service Check
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-83
Back Stain Service Check
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-84
Banding Service Check
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-85
Black Line Service Check
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-86
Color Misregistration Service Check
. . . . . . . . . . . . . . . . . . . . . 2-87
Insufficient Fusing Service Check
. . . . . . . . . . . . . . . . . . . . . . . 2-88
Insufficient Gloss Service Check
. . . . . . . . . . . . . . . . . . . . . . . . 2-89
Jitter Service Check
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-90
Missing Image at Edge Service Check
. . . . . . . . . . . . . . . . . . . 2-91
Mixed Color Image Service Check
. . . . . . . . . . . . . . . . . . . . . . 2-92
Mottle Service Check
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-93
Residual Image Service Check
. . . . . . . . . . . . . . . . . . . . . . . . . 2-94
Ribbing Service Check
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-95
Toner Drop Service Check
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-96
Vertical Line Service Check
. . . . . . . . . . . . . . . . . . . . . . . . . . . 2-97
Vertical Staggering Image Service Check
. . . . . . . . . . . . . . . . . 2-98
Vertical White Band Service Check
. . . . . . . . . . . . . . . . . . . . . 2-99
White Band Service Check
. . . . . . . . . . . . . . . . . . . . . . . . . . . 2-100
White Line I Service Check
. . . . . . . . . . . . . . . . . . . . . . . . . . . 2-101
White Line II Service Check
. . . . . . . . . . . . . . . . . . . . . . . . . . 2-102
White Spot / Black Spot Service Check
. . . . . . . . . . . . . . . . . 2-103
White Print Service Check
. . . . . . . . . . . . . . . . . . . . . . . . . . . 2-104
Wrinkle / Image Migration Service Check
. . . . . . . . . . . . . . . . 2-105
Spacing Table
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-106
Roller Specifications
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-106
v
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