User's ManualSeparate Volume Spot Color GuideC941C942ES9541ES9542Pro9541Pro9542

Setting the Spot Color kit (C941/ES9541/Pro9541 only)

Control Panel Explanation

Menu table of Spot Color toner

Checking the printer drivers

Printer driver functions table

With clear toner mounted (C941/ES9541/Pro9541 only)

Printing on color paper

Printing white under color

Adjusting the print position for spot color overprint (C941/ES9541/Pro9541 only)

Printing on transparent film

Preparing output destination of transparent films

Using Illustrator

Using Photoshop

Fine-tuning the white gradation

Replacing Spot Color kits (C941/ES9541/Pro9541 only)

Oki C941 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

C941

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

network connection problems

troubleshooting

replacing toner cartridges

try using various functions

Try using various functions

Windows PCL printer driver functions

Windows XPS printer driver functions

Mac OS X PS printer driver functions

Printing on various papers

Printing on standard size envelopes

Printing on irregular size envelopes

Printing on glossy paper

Printing on labels and transparencies

Printing on user-selected paper sizes (custom pages and lengthy printing)

Using custom media

Economy printing

Sided Printing

Test printing with toner economy (toner economy mode)

Changing sizes to print

Enlarging and printing multiple sheets (poster printing)

Sorting pages to print pamphlets (booklets)

Clean printing

Printing sharper photos (photo mode)

Compensating fine lines

Using printer fonts

Using PC fonts

Printing print results so that people cannot see them

Printing secret text (encrypted secure print)

Correcting the Print Position on the Paper Using the Control Panel

Adjusting the Image Stretch (Print Length) Using the Control Panel

Advanced print functions

Printing single sheets manually

Automatically selecting trays

Stamping and printing (watermarks)

Collate (sort printing)

Outputting portrait and landscape alternately using batch printing

Saving data for repeat printing

Printing using registered forms (overlay printing)

Automatically switching trays

Using the printer buffer

Outputting to file without printing

Downloading PostScript files

Printing PostScript errors

Changing settings for mono printing

Saving the printer driver settings

Calling and using saved settings

Changing the default printer driver settings

Deleting or updating printer drivers

Updating the printer drivers

Matching Colors

Matching colors using the control panel

Manually compensating density

Watermark adjustment for density compensation

Adjusting the color balance (density)

Adjusting the color balance

Matching Colors Using the Printer Drivers