4 Basic DeviceOperationsPreparing the printerto print2 Setting UpBeforeuseUser's ManualBasicC911C931C941C942ES9411ES9431ES9541ES9542Pro9431Pro9541Pro9542 This manual contains cautions on how to use this product safety.Before you use this product, please make sure that you read this manual.1AppendixIndex3 Printing

Oki C942 User Manual

CONFIGURATION

System conﬁguration

Printer conﬁguration

Composition of optional items

Speciﬁcations

Interface speciﬁcations

Network interface speciﬁcations

DESCRIPTION OF OPERATION

Electrophotographic process mechanism

Printing process

Low-voltage Power Supply

Cover Opening and Closing Detection Switch

Initialization processing

INSTALLATION

Cautions, and do's and don'ts

Installation instructions

Cautions for Banner Tray

Cautions for Packing

TROUBLESHOOTING PROCEDURE

Important notes to start the repair work

Troubleshooting methods

Preparation for troubleshooting

Troubleshooting the abnormal images

Network troubleshooting

Fuse check

Paper cassette switches and paper size correlation table

MAINTENANCE MENUS

System maintenance menu (for maintenance personnel)

Maintenance Utility

User maintenance menu functions

Self-diagnostic mode

Normal self-diagnostic mode (Level 1)

Switch scan test

Motor and clutch test

job offset

Test print

Color registration adjustment test

Density adjustment test

Adjustment of Media Thickness Sensor

Adjustment of Paper Width Sensor

Consumable counter display

Print counter display

Self-diagnostic function setting

LED head serial number display

Error code display

Printing on stand-alone basis

Setup after part replacement

Manual density adjustment setting

Boot Menu List

REPLACEMENT OF PARTS

Notes on replacement of parts

Part replacement procedure

Belt Unit

Transfer roller unit

Fuser unit

Waste toner box

LED Head

Cover-Assy-TC

Lever-Stacker-Full

Guide-Assy-Eject-M

Cover-Assy-Top-B

Duplex-Board(Board-FIT-1)(Duplex unit control PCB)

Filter-Front/Motor-FAN/Board-F1E(External LED PCB)

Board-AHV( High-voltage power supply PCB)

Board-AHR(High-voltage relay PCB)

Low-Voltage-Power-Unit/Low-Voltage-FAN/Geard-Motor

Belt-Drive-Assy/Fuser-Drive-Assy/Belt-Mini-Pitch

Hopper-Assy/Board-F1S(MPT relay PCB)

Frame-Assy-TC/Frame-Assy-TC-R

Plate-Fix-Pivot

Board-F1G(Tag terminal PCB)/ Board-F1N(Toner-low sensor PCB)

EJ-Rail-Unit

Gear-Assy-Oneway-Z33/Gear-Assy-Oneway-Z33-R Board-F1L(Rail unit relay PCB)

Slide-Rail-Assy

Waste toner full sensor Board-F1N(Toner Low sensor PCB)

Connector-Assy-Fuser

Roller-Assy-Regist-T

Board-F1W(Soft switch PCB)

Holder-Head-F/Holder-Head-R

Portions Lubricated

PERIODIC MAINTENANCE

Cleaning

Cleaning the LED lens array

Cleaning feed rollers

Cleaning feed rollers of the Multi-purpose Tray

Cleaning Belt Unit

Cleaning Pinch rollers

Cleaning Transfer roller unit and paper feeding route

CONNECTION DIAGRAMS

Resistance value check

Parts location

C911 DICOM

Maintenance Manual

Reading the Manual

Illustrations

Inscriptions

Troubleshooting

Troubleshooting solutions procedure

Paper jams

error code

Removing jammed paper

printing unit

If paper messages are displayed

If replace consumables messages are displayed

If other messages are displayed

Printing Troubles

Printer driver malfunctions

Print quality is poor

Paper feed is poor

When image disturbance occurs

Maintenance

Replacing consumables and maintenance unit

When the replacement period is approaching

Replacing toner cartridges

toner cartridges

Replacing Image Drums

image drums

Replacing belt units and transfer roller units

Replacing fuser units

Replacing waste toner boxes

Replacing paper feed rollers

paper feed rollers

Device Maintenance

Cleaning the Transfer Roller Unit and Paper Transfer Path

Cleaning the Pinch Roller

Moving and shipping the device

Index

Custom Media Setup Tool

Registering custom media

Applying custom media when printing

C931 DICOM

C941

C942

ES9411 DICOM

ES9431 DICOM

ES9541

ES9542

Pro9431 DICOM

Pro9541

Pro9542