Oki 2400 - page 106

4-46 Service Manual

24xx

Sensor, Home Position Sensor Removal

1. Remove the top cover. Go to “Covers, Top Removal” on

page 4-8.

2. Disconnect the home position sensor cable from the logic

board.

3. Unsnap the home position sensor [A] from the frame.

Contents

Main 24xx U.S.A. P/N: 12G3662 iii Table of Contents iv v vi Safety Information Consignes de Scurit viii Norme di sicurezza Sicherheitshinweise ix Pautas de Seguridad Informaes de Segurana x Informaci de Seguretat Page Preface 1. General Information Printer Description 1-2 Setup Mode Entering Setup Mode Exiting Setup Mode General Information 1-3 Setup Menu Options Interface Menu Options 1-4 Printer Settings Setting The Tear Off Position Setting Top-Of-Form (Continuous - Pull Mode) Setting Top-Of-Form (Cut Forms - Envelopes) Options Tools Abbreviations 2. Diagnostic Information Start Voltage, Ground, And Continuity Readings 2-2 Error Indication Table Diagnostic Information 2-3 2-4 Diagnostic Information 2-5 Symptom Check Table Abnormal Noise Problems 2-6 24xx Abnormal Print Operation Problems Auto Sheet Feeder Problems Diagnostic Information 2-7 Error Indications Paper Feed Problems Operator Panel Problems 2-8 Diagnostic Information 2-9 Power Pro blems 2-10 Print Quality Problems Page 2-12 Irrecoverable Operator Errors Diagnostic Information 2-13 Service Checks Abnormal Noise Service Check Check the entire printer for loose parts. 2-14 Auto Sheet Feeder (ASF) Service Check Diagnostic Information 2-15 2-16 Carrier Service Check Note: The Carrier Service Check includes the carrier drive, home position sensor and ribbon feed. Diagnostic Information 2-17 2-18 Intermittent Problem Service Check Diagnostic Information 2-19 2-20 No Print or Abnormal Print Service Check Operator Panel Service Check 2-22 Paper Present Sensor Service Check Paper Feed Service Check 2-24 Diagnostic Information 2-25 Paper Select Sensor Service Check POST Service Check 2-26 Diagnostic Information 2-27 Power Service Check 2-28 Print Speed Service Check Diagnostic Information 2-29 Printhead Service Check 2-30 Printhead Impedance Tables 2480, 2490 - Approximately 5 ohms 2481, 2491 - Approximately 8 to 16 ohms Pull Tractor Sensor Service Check 2-32 Top-Of-Forms Service Check Tractor 2 Service Check 2-34 Diagnostic Information 2-35 3 Beeps and Tractor 2 LED blinks 3 times 2-36 Tractor 2 Paper Feed Problems 3. Diagnostic Aids Power-On Self Test (POST) Print Test 3-4 Hex Trace Mode Printer Default Settings U.S. Defaults World Trade Defaults 3-6 Clearing Paper Jams Cut Sheet Jams Continuous Forms Jams 4. Repair Information Handling ESD-Sensitive Parts 4-2 Adjustments Printhead-to-Platen Gap Adjustment Page 4-4 Bidirectional Print Adjustment Page 4-6 Covers, Front Removal Covers, Ribbon Access Removal Page 4-8 Covers, Top Removal Page 4-10 Covers, Operator Panel Assembly Removal 4-12 Covers, Bottom Removal Electronics Removals EPROM Removal 4-14 Logic Board Removal Power Supply Removal Carrier Removals Page Page Page Page Page Page Page 4-24 Paper Handling Removals Paper Select Lever Removal Paper Feed Motor Removal Page 4-26 Print Handling Removals Platen Removal Printhead Removal Printhead Cables Removal 4-28 Print Unit Removal Page 4-30 Ribbon Drive Rack Gear Removal Page Page Page Page Page 4-36 Rollers Removals Roller, Upper Feed Removal Page 4-38 Roller, Lower Pinch Removal Page 4-40 Roller, Lower Feed Removal 4-42 Page 4-44 Sensor, Pull Tractor Removal Sensor, Head Gap Removal Sensor, Top-Of-Form Removal Sensor, Paper Select Removal Sensor, Paper Present Removal Flags, Paper Present / Top-Of-Form Removal Page Options Removals Auto Sheet Feeder Gears Removal 4-48 Auto Sheet Feeder Pick-up Roller Removal Page Signal Connections Power Supply (9w & 24w) Page 5-4 Logic Board - Parallel Interface Cable (9w & 24w) CN11 Page 5-6 Logic Board - Serial Board (9w & 24w) CN1 CN200 Page 5-8 Logic Board - USB Cable (9w & 24w) CN12 CN201 Logic Board - DC Power (9w & 24w) Page 5-10 Logic Board - Printhead (9w) CN400 Page 5-12 Logic Board - Printhead (24w) CN300 Page 5-14 Logic Board - Printhead (24w) CN301 Page Logic Board - Gap Set Sensor (9w & 24w) Logic Board - Home Position Sensor (9w & 24w) Logic Board - Paper Present Sensor (9w & 24w) Page Page Page Logic Board - Carrier Motor (9w & 24w) Logic Board - Paper Feed Motor (9w & 24w) Page Logic Board - Operator Panel (9w & 24w) Page 5-24 Logic Board - Dual Tractor Cable (9w & 24w) CN10 Connector Locations 5-25 Serial Board - Serial Cable (9w & 24w) CN2 5-26 Tractor 2 Cable Connectors 6. Preventive Maintenance Lubrication Page Page Page Page Page 7. Parts Catalog How To Use This Parts Catalog Page Parts Cat alog 7-3 Page Parts Cat alog 7-5 Page Parts Cat alog 7-7 Page Page Page Parts Cat alog 7-11 Page Page Page Parts Cat alog 7-15 Page Parts Cat alog 7-17 Page Page Page Parts Cat alog 7-21 7-22 Coax / Twinax Adapter Index A C D E P R S T V I-4 Part Numbers