Lexmark C720 Color Laser (5024) Parts Catalog

• Table of Contents
• Notices and Safety Information
  • Laser Notices
  • Safety Information
• Preface
• 1. General Information
  • Maintenance Approach
  • Tools Required for Service
  • Serial Number
  • Acronyms
  • Standard Features
    • Printer (Main)
    • Printer Options
  • Printer Identification
  • Options Identification
  • Printer Theory of Operation
  • Printer Systems Description
    • Basic Principles of Color Printing
    • Mechanical and Electrical Structures
    • Printer Component Systems
    • Basic Process of Color Printing
    • Print System and Transfer System
    • Structure of OPC Belt (Photo Developer Cartridge)
    • Basic Structure of the Print System
  • Details of the Print System
    • Charging Process
    • Exposing Process
    • Developing Process
    • First Transfer (Drum) Process
    • Belt Discharge (Erase Lamp) Process
    • Belt Cleaning Process
  • Details of the Transfer System
    • Second Transfer (Paper) Process
    • Paper Discharging Process
    • Drum Cleaner Process
  • Details of the Optical System
  • Details of the Paper Transportation System
    • Fusing Unit
    • Fusing Process
  • Control System Structure
    • Electrical System and Function
    • Control of Print Process
    • Print Sequence Diagram
    • Laser Drive Control Circuit
    • Interface Control
  • Lower Feed Unit Theory of Operation
  • Duplex Theory of Operation
• 2. Diagnostic Information
  • Start
  • Service Error Codes
  • Operator Messages
  • Paper Jam Messages
  • Symptom Tables
    • Printer Symptom Table
    • Print Quality Symptom Table
    • Optional Lower Feed Unit Symptom Table
    • Optional Duplex Unit Symptom Table
  • Printer Service Checks
    • 901—Yellow Developer Clutch Service Check
    • 902—Magenta Developer Clutch Service Check
    • 903—Cyan Developer Clutch Service Check
    • 904—Black Developer Clutch Service Check
    • 905—Yellow/Black Developer Solenoid Service Check
    • 906—Magenta/Cyan Developer Solenoid Service Check
    • 907—Toner Empty Sensor P.W.B. Board Service Check
    • 910—Developer Motor (DM) Drive Service Check
    • 911—Main Motor (MM) Service Check
    • 915—Control Cooling Fan Service Check
    • 916—Ozone Fan Service Check
    • 917—Fuser Heater Fan Service Check
    • 918—Erase Lamp Service Check
    • 920, 922, 923—Fuser Unit Service Check
    • 921—Fuser Thermistor Service Check
    • 981—Duplex Motor (DPM1, DPM2) Service Check
    • 982—Duplex Upper Solenoid (DSOL-U) Service Check
    • 983— Duplex Fan (D-FAN) Service Check
    • 984—Duplex Lower Solenoid (DSOL-L) Service Check
    • 990—Transfer Drum Encoder Sensor (HPSEN) Service Check
    • 991—Transfer Roller Cam Clutch (TRCM) Service Check
    • 992—Drum Cleaner Brush Cam Clutch (FBCM) Service Check
    • 993—Cleaner Clutch (FBCL) Service Check
    • 994—Fuser Clutch (FUCL) Service Check
    • 995—OPC Belt Cartridge, Belt Marker Sensor (PBS) Service Check
    • 997—High Voltage Power Supply Unit (HVU) Service Check
    • OPC Belt (Photo Developer) Cartridge Drive Service Check
    • Operator Panel Service Check
    • Options No Power Service Check
    • Paper Discharge Service Check
    • Printer No Power Service Check
    • Toner Feed Service Check
    • Waste Toner Feed Service Check
  • Paper Feed Service Checks
    • Printer Paper Feed Service Check
    • Lower Feed Unit Paper Feed Service Check
    • Duplex Paper Feed Service Check
  • Print Quality Service Checks
    • Background Service Check
    • Back Stain Service Check
    • Banding Service Check
    • Black Line Service Check
    • Color Misregistration Service Check
    • Insufficient Fusing Service Check
    • Insufficient Gloss Service Check
    • Jitter Service Check
    • Missing Image at Edge Service Check
    • Mixed Color Image Service Check
    • Mottle Service Check
    • Residual Image Service Check
    • Ribbing Service Check
    • Toner Drop Service Check
    • Vertical Line Service Check
    • Vertical Staggering Image Service Check
    • Vertical White Band Service Check
    • White Band Service Check
    • White Line I Service Check
    • White Line II Service Check
    • White Spot / Black Spot Service Check
    • White Print Service Check
    • Wrinkle / Image Migration Service Check
  • Spacing Table
    • Roller Specifications
• 3. Diagnostic Aids
  • Disabling Download Emulations
  • Paper Jam Sequence
  • Diagnostic Mode
    • Diagnostics Menu Structure
    • Print Quality Test Pages
  • Print Registration
    • Setting Tray 2 Left Margin
    • Setting Top Margin
  • Print Tests
  • Hardware Tests
    • LCD Test
    • Button Test
    • Parallel Wrap Test
    • ROM Memory Test
    • DRAM Memory Test
    • Serial Wrap Test
  • Duplex Tests
    • Duplex Left Margin
  • Device Tests
    • Quick Disk Test
    • Disk Test/Clean
    • Flash Test
  • Printer Setup
    • Setting the Page Count
    • Viewing the Permanent Page Count
    • Serial Number
    • Setting Configuration ID
    • Parallel Strobe Adjustment
  • Resetting Counters
  • Error Log
    • Viewing the Error Log
    • Clearing the Error Log
    • Restore EP Factory Defaults
  • Exiting Diagnostic Mode
  • Print Quality Test Page
• 4. Repair Information
  • Removal and Cleaning Precautions
  • Handling the Printed Circuit Boards with MOS ICs
    • During Transportation/Storage:
    • During Replacement:
    • During Inspection:
  • Image Belt Cartridge/OPC
    • During Transportation/Storage
    • Handling
    • Parts Not To Be Touched
  • Adjustments
  • Printer Removal Procedures
    • Precautions to Take Before Maintenance Work
  • Printer Covers
    • Upper Side Cover (L) Removal
    • Side Cover (R) Removal
    • Side Cover (L) Removal
    • Side F Cover (L) Removal
    • Top Cover Assembly Removal
    • Paper Exit Cover / Paper Exit Front Cover / Paper Exit Cover (U) Removal
    • Transfer Cover Removal
    • Rear Cover Removal
    • Rear Cover (U) Removal
    • Base Cover (R) Removal
    • Base Cover (L) Removal
    • Cleaner Cover Removal
    • Front Cover Removal
  • Printer Board Removals
    • Printer Board Layout
    • Main Engine (MCTL P.W.B.) Board Removal
    • IOD1 P.W.B. Removal
    • IOD2 P.W.B. Removal
    • Panel P.W.B. (Operator Control) Removal
    • Power Supply Unit (Low Voltage Power Supply - LVPS) Removal
    • High Voltage Power Supply Unit (HVU) Removal
    • Erase Lamp Removal
  • Motor Removals
    • Fan / Motor Layout
    • Main Motor (MM) / BD Gear Assembly Removal
    • Main Gear Unit Removal
    • Developer Motor (DM) Removal
    • Developer Drive Unit Removal
    • Optical Unit (Printhead Scanner Motor Assembly) Removal
    • Control Fan (3) (CTFAN) Removal
    • Heater Fan (HTFAN) Removal
    • Ozone Fan (OZFAN) / Ozone Duct Assembly Removal
  • Clutch and Solenoid Removals
    • Clutch (FUCL, FBCL, RECL) Removal
    • Paper Feeder Clutch (PCLU) Removal
    • Developer Clutch (DCLK, DCLY, DCLM, DCLC) Removal
    • Cam Clutch (FBCM, TRCM) Removal
  • Sensor Removals
    • Interlock Switch (Front) Removal
    • Interlock Switch (Top) Removal
    • Interlock Switch (Rear) Removal
    • Paper Sensor (Paper Feeding Sensor PT1) Removal
    • Paper Exit Sensor (PT2) Removal
    • Paper Empty Sensor (PEU) / OHP Sensor (OHP) Removal
    • Paper Size Sensor (PSU) Removal
    • Drum Jam Sensor (DPJ) Removal
    • Oil Sensor (OIL) Removal
    • Drum Encoder Sensor (HPSEN) Removal
    • Belt Sensor (PBS) Removal
    • Waste Toner Sensor (TBLE/TBFL) (Waste Toner Holder Assembly) Removal
    • Toner Sensor Assembly (TPD) / (TTR) Removal
    • Cleaning Roller Sensor (FCS) Removal
    • Paper Full Sensor (PFUL) Removal
    • Toner Key Sensor (TNK) Removal
  • Transfer Unit (Rollers and Drum) Removal
    • Transfer Unit Removal
    • Registration Roller Removal
    • Transfer Drum Removal
    • Paper Feed Roller / Separator Pad Removal
    • Front Cover Unit Removal
    • Paper Exit Unit / Paper Exit Roller Removal
    • Discharger Brush Removal
    • Waste Toner Feeder (U) (Stay 'A' Assembly) Removal
    • Fuser Connector Removal
    • Waste Toner Feeder (L) Removal
  • Fuser Unit Removal
  • Lower Feeder Unit (LFU) Removals
    • Lower Feeder Unit Top Cover (R) Removal
    • Lower Feeder Unit Top Cover (L) Removal
    • Lower Feeder Unit Front Top Cover Removal
    • Lower Feeder Unit Base Cover (R) Removal
    • Lower Feeder Unit Base Cover (L) Removal
    • Lower Feeder Unit Paper Sensor Removal
    • Lower Feeder Unit Paper Size Sensor (SL-PS -A57 P.W.B. Assembly) Removal
    • Lower Feeder Unit Paper Feed Clutch (PKCLL) / LF Clutch (DPKCL) Removal
    • Lower Feeder Unit Paper Feeder Rolling / Separator Pad Removal
  • Duplex Cover and Paper Guide Removals
    • Duplex Side Cover Low (R) Removal
    • Duplex Side Cover Low (L) Removal
    • Duplex Cover Top (R) Removal
    • Duplex Cover Top (L) Removal
    • Duplex Cover Top (B) Assembly Removal
    • Duplex Cover Top (C) Assembly Removal
    • Duplex Cover Low (B) Assembly Removal
    • Duplex Bottom Cover Assembly Removal
    • Duplex Paper Guide RVS Unit Removal
    • Duplex Paper Guide RVS IN Removal
    • Duplex Paper Guide Bottom Removal
    • Duplex Paper Top Assembly (D-Top Unit and D-Lower Unit) Removal
    • Duplex Paper Guide Top Assembly Removal
    • Duplex Print P.W.B. Removal
    • Duplex Relay P.W.B. Removal
    • Duplex Motor 1 Removal
    • Duplex Motor 2 Removal
    • Duplex Fan Motor Removal
    • Duplex Solenoid (U) Assembly Removal
    • Duplex Solenoid (L) Assembly Removal
    • Duplex Interlock Switch (D-SW1, D-SW2) Removal
    • Duplex Interlock Switch (D-SW3, D-SW4) Removal
    • Duplex D Paper Sensor (PT5) Removal
    • Duplex Paper Sensor Low (PT4) Removal
• 5. Locations
  • Printer
  • Options
  • Electronic Components
    • Sensor Locations
    • Printer Circuit Board Locations
    • Fan/Motor Locations
    • Solenoid/Clutch Locations
    • Symbol and Part Name Table
    • Wiring Diagram / Cable Harness Reference
    • Controller RIP Card
    • Main Engine (MCTL P.W.B.) Board
    • IOD1 P.W.B. Board
    • IOD2 P.W.B. Board
    • Low Voltage Power Supply (LVPS) Board
    • High Voltage Unit (HVU) Board
    • Fuser Unit (LVPS) Board
  • Connector Locations for Options
    • Lower Feed Unit Option
    • Duplex Unit
  • Connector Pin Assignments
    • Location 1
    • Location 2
    • Location 3
    • Location 4
    • Location 5
    • Location 6
    • Location 7
    • Location 8
    • Location 9
    • Location 10
    • Location 11
    • Location 12
    • Location 13
    • Location 14
    • Location 15
    • Location 16
    • Location 17
    • Location 18
    • Location 19
    • Location 20
    • Location 21
    • Location 22
    • Location 23
    • Location 24
    • Location 25
    • Location 26
    • Location 27
    • Location 28
    • Location 29
    • Location 30
    • Location 31
    • Location 32
    • Location 33
    • Location 34
    • Location 35
    • Location 36
    • Location 37
    • Location 38
    • Location 39
    • Location 40
    • Location 41
    • Location 42
  • Printer Cables
    • Cable 1 Connector Assignments
    • Cable 2 Connector Assignments
    • Cable 3 Connector Assignments
    • Cable 4 Connector Assignments
    • Cable 5 Connector Assignments
    • Cable 6 Connector Assignments
    • Cable 7 Connector Assignments
    • Cable 8 Connector Assignments
    • Cable 9 Connector Assignments
    • Cable 10 Connector Assignments
    • Cable 11 Connector Assignments
    • Cable 12 Connector Assignments
    • Cable 13 Connector Assignments
• 6. Preventive Maintenance
  • Safety Inspection Guide
  • Service Precautions
  • Cleaning Procedures
  • Lubrication Specifications
  • Printer Supplies and Maintenance Schedules
  • Cleaning for Maintenance
• 7. Parts Catalog
  • How to Use this Parts Catalog
• Index