Lexmark 1020 5-2

5-2

4078-00X

Connector Connector Names

CN1 Printhead Cable 1

CN2 Printhead Cable 2

CN4 Carrier TransportMotor

CN5 Home Position Sensor

CN6 Paper FeedMotor

CN7 PowerSupply

CN8 Parallel Port

SW1 Power Switch

SW2 Paper Feed Switch

SW3 Install Print Car tridge Switch

LED1 BusyLight

LED2 Poweron Light

Contents

Main Page Contents Page Preface Safety Information Page Page Page Page Abbreviations Unique Tools Required For Service 2. Diagnostic Information Start Error Indicator Table 10 Power-On Self Test(POST) Sequence Diagnostic Information 2-3 POST Symptom Table Symptom Tables Diagnostic Information 2-5 Paper Feed Problems Print Quality Problems Power Prob lems 2-6 Service Checks Carrier Transport Service Check Envelope Feed Service Check Diagnostic Information 2-7 Maintenance Station Service Check Page 2-10 Paper Path Service Check 2-12 Parallel Port Service Check Power Service Check Diagnostic Information 2-13 Print Quality Service Check 2-14 Print Quality Notice 3. Diagnostic Aids EOF and Home Position Sensors Test Initialize Error Log Parallel Port Test Print NVRAM Contents Page Reset NVRAM to USA Defaults Test Page Page Adjustments Removal Procedures Releasing Plastic Latches Access Cover Removal Base Assembly Removal Carrier Belt Removal Carrier Frame Assembly Removal Carrier Home Sensor Removal Carrier Transport Motor Removal Drive Train Assembly Removal Front Cover Removal Gutter Pad Removal Large Feed Roll Removal Maintenance Station Assembly Removal Maintenance Wiper and Cap Removal Mid Frame Assembly Removal Paper Feed Motor Removal Power Supply Removal Printhead Carrier Assembly Removal Rear Cover Removal Sheet Feeder Removal Small Feed Roll Assembly Removal Small Feed Roll Bracket Assembly Removal System Board Removal Page 5-2 Page Page Page Page Page 7-5 Page Page Page 7-9 Page Page Page Page Index A C D E EMEA USA