Oki 2400 Rollers Removals

4-36 Service Manual

24xx

Rollers Removals

Roller, Upper Feed Removal

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

page 4-8.

2. Remove the screw from the print cable shield and remove the

shield.

3. Remove the gear from the left end of the upper feed roller, as

shown.

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