Oki C911 DICOM Owner's manual

D‑206‑1/2 Ｄ規‑1039、Ｄ手‑68 制定 2004.10.22 第 2版
Usefor
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Date
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DCONo.
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Certification
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Body
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Design
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Date
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Check
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Approval
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DrawingNo.
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45530603TX
Add 2.1.2(5)Media Size Limit
Drawing maintenance for coated paper.
Add Pro9541WT model
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130
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Design
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C911/C931/C941/Pro9541WT
ProductSpecification
1 2 3 4 5 6
Approval

Contents

Satoshi Gima
Teruaki Kuroda
Yasunobu Suzuki
2013‑12‑11
BOM
Makoto Yabuki
Masahiro Kawano
Hiroshi Yuasa
SFC-0217
SFE-0003
SFC-0768
2014-01-07
2016-01-21
2018-10-05
2
3
4
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

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



NaokiSunaga

HiroshiYuasa

NaokiSunaga

SatoshiGima

OkiDataCONFIDENTIAL

No.03
C911/C931/C941/
Pro9541WT
Color LED Page Printer
Product Specification
2013-2018 Oki Data Corporation
[ Rev 4 ]
  
Ｃ
弊社グリーン調達基準書に従うこと。又、本物品に使用される化学物質等の資料を提出すること。

RequirementssetforthinODC'sGreenProcurementStandardshouldbemet.Also,submitdocuments 
detailingchemicalsubstancesusedintheunitsorcomponentsshownonthisdrawing.

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History of evision
Rev No. Date Corrected items Person in charge
No. Page Description of change
1 2013-12-11 ISSUE(2013-12-11) N Sunaga
2 2014-01-07 19 2.1.2 Print Media Specifications
Add (5)Media Size Limit Satoshi Gima
3 2016-01-21 13 2.1.2 PrintMedia Specifications
Change (1)Requirements for Print Paper. Teruaki Kuroda
16 and 17 2.1.2 Print Media Specifications
(2) Requirements for Auto-feeder Tray Print Paper
g) Glossy-finish paper
and
(3) Requirements for MPT Paper
(g) Glossy-finish paper
Change Glossy-finish paper to Glossy paper
4 2018-10-05 ALL (Added) Pro9541WT model M Abe
8 (Change) 2.1.1 Printing Specifications
(2) Maximum Area Coverage Y Miyazaki
14 (Change) 2.1.2 Print Media Specifications
(2) Requirements for Auto-feeder Tray Print Paper
c) Types and sizes of plain paper and recycled paper
M Abe
17 (Added) 2.1.2 Print Media Specifications
(2) Requirements for Auto-feeder Tray Print Paper
Added h) Transfer paper
M Abe
20 (Added) 2.1.2 Print Media Specifications
(3) Requirements for MPT Paper
Added i) Transfer paper
M Abe
29 (Change) 2.2 Electrical Performance
(6) Safety and EMC HInoue
35 (Change) 3.1 Configurations
Attachments
(1) ACPowerCord
HInoue
37 (Change) 3.2 Quality Assurance
(3) Paper Jam Rates H Yuasa
74 -75 (Change) 8.3 User Menu
SMR setting
BG setting
DV Roller Cleaning
Y Niijima

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Table of Contents
1Overview............................................................................5
1.1 Scope of Application ...........................................................................................................................5
1.2 Use for.................................................................................................................................................5
1.3 Description..........................................................................................................................................5
1.4 Related Documents ............................................................................................................................7
1.5 Others..................................................................................................................................................7
2Performance (Conditions, Ratings and Specifications).....................................7
2.1 General Performance..........................................................................................................................7
2.1.1 Printing Specifications..................................................................................................................8
2.1.2 Print Media Specifications.......................................................................................................13
2.1.3 Paper Input/Output Specifications .............................................................................................20
2.1.4 Duplex Printing...........................................................................................................................25
2.1.5 Assured Print Area .....................................................................................................................26
2.1.6 Area Coverage...........................................................................................................................26
2.1.7 Consumables Specifications......................................................................................................26
2.1.8 User-replaceable Units...............................................................................................................26
2.2 Electrical Performance....................................................................................................................28
2.3 Mechanical Performance................................................................................................................31
2.4 Environmental Performance...........................................................................................................33
3Specifications Designated.............................................................34
3.1 Configurations...................................................................................................................................34
3.2 QualityAssurance.............................................................................................................................35
3.3 Packing..............................................................................................................................................38
3.4 Others................................................................................................................................................38
4Others.............................................................................39
4.1 Functional Overview .........................................................................................................................39
5Operation Switche and Levers.........................................................41
5.1POWER switch..................................................................................................................................41
5.2Levers................................................................................................................................................41
6Fonts..............................................................................42
6.1 PCL Roman Font ............................................................................................................................42
6.1.1 Font Typs ......................................................................................................................................42
6.1.2 Rasterizer......................................................................................................................................42
6.1.3 Font Cache....................................................................................................................................42
6.1.4 Resident/Euro Scalable Fonts......................................................................................................42
6.1.5 Resident Bitmap Font.................................................................................................................44
6.1.6 Symbol Sets..................................................................................................................................44
6.1.7 Euro Characters............................................................................................................................47
6.1.8 Down Line Loading Fonts ..........................................................................................................47
6.1.9 Bitmap DLL Fonts .........................................................................................................................47
6.1.10 Scalable DLL Fonts.....................................................................................................................47
6.1.11 Download Font to File System....................................................................................................47
6.2 SIDM Fonts.....................................................................................................................................47
6.3 PostScript3 Roman Fonts...............................................................................................................48
6.3.1 PreScanned Bitmap Fonts............................................................................................................48
6.3.2 Type-1 Scalable Fonts..................................................................................................................48
6.3.3 Type-42 Scalable Fonts................................................................................................................48
6.3.4 Type-3 Scalable Fonts..................................................................................................................48
6.3.5 Raterizer........................................................................................................................................48
6.3.6 Font Cache....................................................................................................................................48
6.3.7 Resident European Scalable Fonts..............................................................................................48
6.3.8 Resident Bitmap Font ...................................................................................................................51
6.3.9 Encoding.......................................................................................................................................51
6.3.10 Fonts...........................................................................................................................................51
7Panel Switch Functions...............................................................51
7.1Layout................................................................................................................................................51
7.2 Switch function in operational mode....................................................................................................51

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7.2.1 Switch function in operational mode.............................................................................................51
7.2.2 Switch function in the AC input power supply............................................................................... 52
7.2.3 Switch function in operational mode.............................................................................................52
7.3 LED・LCD......................................................................................................................................53
7.4 LCD Backlight.................................................................................................................................53
7.4.1 Overview of the Spec....................................................................................................................53
7.5 Job Canel........................................................................................................................................54
7.5.1 Statuses Where Jobs Can Be Cancelled................................................................................54
7.5.2 Cancell Operation ..................................................................................................................54
8Menu..............................................................................56
8.1 Menu Types.......................................................................................................................................56
8.2 RulesofMenuOperation..................................................................................................................56
8.3 UserMenu.........................................................................................................................................58
8.4 Boot Menu.........................................................................................................................................92
9. Outline Of Control Commands..........................................................93
9.1 PJLCommands.................................................................................................................................93
Appendix-A LCD/LED DISPLAYS......................................................94
LCD/LED Display Method..........................................................................................................................94
The following shows the basic display method of LCD.............................................................................94
Normal Status............................................................................................................................................94
Warning Status ..........................................................................................................................................94
Error Status................................................................................................................................................94
LCD/LED Display List................................................................................................................................94
Appendix-B PRINTABLE AREA.........................................................122
Appendix-C Time chart of comsumable control.........................................129

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1 Overview
C911/C931/C941/Pro9541WT is a tandem type LED electrophotographic A3Nobi color page printer
having four or five tandemly arranged color image drum cartridges in it.
C911/C931 : 4 color (YMCK）
C941 : 5 color (YMCK+Spot Color : White or Clear)
Pro9541WT : 5 color (YMCK+White)
The printer converts single-color images extracted from original computer text and graphics images
into optical pulses to write them on the surfaces of its optical drums. Dry toner selectively adheres on
the surfaces of image drums. Thus toner image forms on it. The toner images on the drum are
transferred to paper for printing.And toner image on paper is fused by the fuser in printer.
The light sources of C911/C931/C941/Pro9541WT are light-emitting diode (LED) arrays.
1.1 Scope of Application
This specification applies to the C911/C931/C941/Pro9541WT LED A3Nobi color page printers (PDL
type) aimed at world-wide sales markets.
1.2 Use for
C911/C931/C941/Pro9541WT are high-speed, high-image-quality, general-purpose printer that can
be used for various purposes, including graphic design, DTP and POP, as well as general office
automation.
1.3 Description
Definitions of terms
(1) Control Unit (PUCU)
The control unit (PUCU) of C911/C931/C941/Pro9541WT, receives and analyzes PS/PCL
commands sent from host computers to draw images. Rasterized images are sent to
process control part and printed. Also controls input and output through an operation panel.
Notices, such as instructionsand warnings are issued to the operation panel and
higher-level host computers according to printer’s operation status information provided by
PUCU. The process control part controls the printing operations performed by the
electrophotographic process of the printer. The PUCU performs the control of the entire
functions of the printer, such as issuing the printer’s internal timing signals to monitor the
printer’s paper path status to print the images.
(2) Print Engine
In C911/C931/C941/Pro9541WT, the parts controlled by the PUCU, mechanism part, image
producing part and various sensors.
(3) PPM (Pages per Minute)
PPM is a measure of the print speed. Expressed in the number of pages a printer can print
in one minute.
(4) SEF (Short Edge Feed) and LEF (Long Edge Feed)
Feeds paper lengthwise and sideways, respectively.
Functional Overview
(1) High-speed Color Image Printing
C911/C931/C941/Pro9541WT adopt a tandem printing system that uses four or five image
drum cartridges placed in series with one another. With the system, the printer can print
monochrome and color images at superfast speeds.
(2) Print Speeds
50ppm (mono/color printing, paper size A4 LEF, paper weight 55Kg (64 g/m2))

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Humidity
(%RH)
Temperature (°C)
Operating Range
Full-color Print Quality Assured Range
32
27
17
10
50 60 70 80
20
(3) Print Resolutions
1200 x 1200dpi, 600 x 600dpi, and 1200 x 600dpi x 4bit
(4) Paper Handling
C911/C931/C941/Pro9541WT is equipped with a paper cassette that can be loaded with
530-sheet plain paper (80 g/m2), and a multipurpose tray (MPT) that can be loaded with
300-sheet paper (80 g/m2), as its paper feed sources as standard.
The printer has, as its paper feed destinations, a 610-sheet face-down paper (80 g/m2)
stacker and 300-sheet face-up paper (80 g/m2) stacker as standard.
(5) User Maintenance
C911/C931/C941/Pro9541WT is designed to allow its users to replace its components, such
as consumables, paper and replaceable units, easily.
Operating Conditions
(1) Environmental Conditions
(a) Operating Temperature and Humidity Conditions
When operated under the ambient temperature and humidity conditions shown in figure 1,
C911/C931/C941/Pro9541WT meets the requirements specified in this document. The
conditions are as outlined in table 1.
(Note) In case of China tropical environment, operating temperarure is insured up to 35 degree and
operating humidity up to 85%RH .
Figure 1. Operating Temperature and Humidity Conditions
Table 1. Outline of Temperature and Humidity Conditions
Operating
Power-
off Storage
Transport
Measurement
Unit
Temperature 10 to 32 0 to 43 -10 to 43 -29 to 50
o
C
Humidity 20 to 80 10 to 90 10 to 90 10 to 90 %RH
Maximum Wet-bulb
Temperature 25 26.8 35 40 oC
Minimum Difference
between Wet- and
Dry-bulb Temperatures
2 2 oC
•Storage conditions are given for packed C911/C931/C941/Pro9541WT.
•Temperatures and humidities are applicable except where condensation occurs.
•The operating temperatures and humidities at which full-color print quality is assured
are 17 to 27 oC, and 50 to 70 %RH.
•The transportation of C911/C931/C941/Pro9541WT in areas of high temperatures of
43oC (100oF) or more should be within one month.

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(b) Operating Heights
C911/C931/C941/Pro9541WT can be used at a place situated 2,500m or less above sea
level.
(c) Storage Conditions (for packed C911/C931/C941/Pro9541WT)
Maximum Temperature and Humidity Variations: 15oC per hour and 15%RH per hour,
non-condensing
Storage Heights: Upto 10,000 m
Temperature and Humidity Conditions for Printer (without Supplies)
Temperatures: -20 to 60 oC
Relative humidities: 10 to 90 %RH
Maximum wet-bulb temperature: 35 oC
Temperature and Humidity Conditions for Printer (with Supplies - Toner and Image Drum
Cartridges)
Temperatures: -10 to 43 oC
Relative humidities: 10 to 90 %RH
Maximum wet-bulb temperature: 35 oC
(d) Transport Conditions
Maximum Temperature and Humidity Variations: 15oC per hour and 15 %RH per hour,
non-condensing
Temperature and Humidity Conditions for Printer (with Supplies) and for Its Supplies
Temperatures: -29 to 50 oC (-22 to 122 oF)
Relative humidities: 10 to 90 %RH
Maximum wet-bulb temperature: 40oC
Transport Duration: The time for transporting C911/C931/C941/Pro9541WT in high
(43oC/110oF, or more) temperature areas should be within one month.
(2) Installation Conditions
(a) Levelness
C911/C931/C941 should be installed in a horizontal position. The printer’s installation
surface deviations should be within 10 mm from a horizontal plane.
1.4 RelatedDocuments
C911/C931/C941 Print Quality Specification
1.5 Others
- Not specified. -
2 Performance (Conditions, Ratings and Specifications)
2.1 GeneralPerformance
C911/C931/C941/Pro9541WT broadly consists of functions, such as printing process, paper
feeding and printer controlling electronic equipment. The basic performance specifications of
the printer are as below.

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2.1.1 PrintingSpecifications
(1) Printing Process
C911/C931/C941/Pro9541WT is an electrophotographic tandem page printer. The printer
can support printing on 330-mm-wide paper. The printer feeds a paper edge horizontal to
the print width of the paper. The printer can feed paper of A4, A5, B5, Letter, 16K（3types）
and SRA4 sizes SEF and LEF. The printer feeds paper of the other sizes SEF. Those
edges of envelopes which the printer first feed vary depending on the type of an envelope.
See 2.1.3 Paper Input/Output Specifications for description on it.
C911/C931/C941/Pro9541WT models are equipped as standard with a function of printing
both sides of paper. The printing process of the printer includes the imaging ability of the
exposure system of the printer.
(2) Maximum Area Coverage
C911/C931/C941/Pro9541WT supports area coverages of up to 300% without being
degraded in print quality, with optical densities of K1.5/YMC1.4 or less in each elementary
color(YMC)and 0.26 or more in white. Referto 2.1.6 for the area coverages.
When printing with coverage of 240% or more including 300% process black and white, PQ
depends on the characteristics of the medium to be used.
(3) Exposure System
The exposure system of C911/C931/C941/Pro9541WT consists of four or five LED array
heads that are assembled into one piece each.
(4) Resolutions
1200 x 1200 dpi, 600 x 600 dpi, and 1200 x 600 dpi x 4bit
(5) Continuous Print Speeds (Engine Performance)
C911/C931/C941/Pro9541WT operates at a normal speed of 239mm per second, when it
prints on plain paper of up to 64 g/m2plain paper. The printer can perform one-sided printing,
and two-sided printing using its duplex unit, almost at the following continuous speeds (the
continuous speeds in the one-sided printing, and those in the two-sided printing, are
expressed in per-minute pages printed and in pages printed, respectively).
4

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Table3-1a.Plain-paper Print Speeds(In case 4 colors) (Accuracy within ±3%)
Mode Paper
Size Media Weight
Paper Weight
(Basis Weight)
Speed (ppm)
1st-Tray,
One-sided Printing
Speed (ppm)
1st-Tray,
Two-sided Printing
Speed (ppm)
MPT
One-sided Printing
Color/
Monochrome Printing
A4 LEF
(*1)
Auto 45 to 310Kg
(52 to 360g/m2)50〜18(*2) 50〜18(*2) 50~18(*2)
UltraLight 45 to 54Kg
(52 to 63g/m2)50(*2) N/A 50(*2)
Light 55 to 59Kg
(64 to 68g/m2) 50(*2) 50(*2) 50(*2)
MediumLight 60 to 71Kg
(69 to 83g/m2)45(*2) 45(*2) 45(*2)
Medium 72 to 89Kg
(84 to 104g/m2)40 40 40
MediumHeavy
90 to 103Kg
(105 to 120g/m2)
32 32 32
Heavy 104 to 110Kg
(121 to 128g/m2)
27 27 27
UltraHeavy1 111 to 162Kg
(129 to 188g/m2)
22 22 22
UltraHeavy2 163 to 186Kg
(189 to 216g/m2)
22 22 22
UltraHeavy3 187 to 220Kg
(217 to 256g/m2)
18 18 18
UltraHeavy4 221 to 275Kg
(257 to 320g/m2)
18 18 18
UltraHeavy5 276 to 310Kg
(321 to 360g/m2)
18 N/A 18
Color/
Monochrome Printing
A3
Auto 45 to 310Kg
(52 to 360g/m2)28〜10(*2) 28〜10(*2) 28〜10(*2)
UltraLight 45 to 54Kg
(52 to 63g/m2)28(*2) N/A 28(*2)
Light 55 to 59Kg
(64 to 68g/m2) 28(*2) 28(*2) 28(*2)
MediumLight 60 to 71Kg
(69 to 83g/m2)25(*2) 25(*2) 25(*2)
Medium 72 to 89Kg
(84 to 104g/m2)22 22 22
MediumHeavy
90 to 103Kg
(105 to 120g/m2)
18 18 18
Heavy 104 to 110Kg
(121 to 128g/m2)
15 15 15
UltraHeavy1 111 to 162Kg
(129 to 188g/m2)
12 12 12
UltraHeavy2 163 to 186Kg
(189 to 216g/m2)
12 12 12
UltraHeavy3 187 to 220Kg
(217 to 256g/m2)
10 10 10
UltraHeavy4 221 to 275Kg
(257 to 320g/m2)
10 10 10
UltraHeavy5 276 to 310Kg
(321 to 360g/m2)
10 N/A 10
Color/
Monochrome Printing
Letter
LEF
(*1)
Auto 45 to 310Kg
(52 to 360g/m2)49.5〜17.5(*2) 49.5〜17.5(*2) 49.5〜17.5(*2)
UltraLight 45 to 54Kg
(52 to 63g/m2)49.5(*2) N/A 49.5(*2)
Light 55 to 59Kg
(64 to 68g/m2) 49.5(*2) 49.5(*2) 49.5(*2)
MediumLight 60 to 71Kg
(69 to 83g/m2)44.5(*2) 44.5(*2) 44.5(*2)
Medium 72 to 89Kg
(84 to 104g/m2)39.5 39.5 39.5
MediumHeavy
90 to 103Kg
(105 to 120g/m2)
31.5 31.5 31.5
Heavy 104 to 110Kg
(121 to 128g/m2)
26.5 26.5 26.5
UltraHeavy1 111 to 162Kg
(129 to 188g/m2)
21.5 21.5 21.5
UltraHeavy2 163 to 186Kg
(189 to 216g/m2)
21.5 21.5 21.5
UltraHeavy3 187 to 220Kg
(217 to 256g/m2)
17.5 17.5 17.5
UltraHeavy4 221 to 275Kg
(257 to 320g/m2)
17.5 17.5 17.5
UltraHeavy5 276 to 310Kg
(321 to 360g/m2)
17.5 N/A 17.5

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Table3-1b.Plain-paper Print Speeds (In case Spot-color White) (Accuracy within ±3%)
Mode Paper
Size Media Weight Paper Weight (Basis Weight)
Speed (ppm)
1st-Tray,
One-sided Printing
Speed (ppm)
1st-Tray,
Two-sided Printing
Speed (ppm)
MPT,
One-sided Printing
Speed (ppm)
Spot-color over print
One-sided Printing
Color/
Monochrome Printing
A4 LEF
(*1)
Auto 45 to 310Kg
(52 to 360g/m2)45〜18(*2) 45〜18(*2) 45~18(*2) 16〜6(*2)
UltraLight 45 to 54Kg
(52 to 63g/m2)45(*2) N/A 45(*2) N/A
Light 55 to 59Kg
(64 to 68g/m2) 45(*2) 45(*2) 45(*2) 16(*2)
MediumLight 60 to 71Kg
(69 to 83g/m2)45(*2) 45(*2) 45(*2) 16(*2)
Medium 72 to 89Kg
(84 to 104g/m2)40 40 40 14
MediumHeavy
90 to 103Kg
(105 to 120g/m2)
32 32 32 11
Heavy 104 to 110Kg
(121 to 128g/m2)
27 27 27 10
UltraHeavy1 111 to 162Kg
(129 to 188g/m2)
22 22 22 8
UltraHeavy2 163 to 186Kg
(189 to 216g/m2)
22 22 22 8
UltraHeavy3 187 to 220Kg
(217 to 256g/m2)
18 18 18 6
UltraHeavy4 221 to 275Kg
(257 to 320g/m2)
18 18 18 6
UltraHeavy5 276 to 310Kg
(321 to 360g/m2)
18 N/A 18 N/A
Color/
Monochrome Printing
A3
Auto 45 to 310Kg
(52 to 360g/m2)25〜10(*2) 25〜10(*2) 25〜10(*2) 6〜2(*2)
UltraLight 45 to 54Kg
(52 to 63g/m2)25(*2) N/A 25(*2) N/A
Light 55 to 59Kg
(64 to 68g/m2) 25(*2) 25(*2) 25(*2) 6(*2)
MediumLight 60 to 71Kg
(69 to 83g/m2)25(*2) 25(*2) 25(*2) 6(*2)
Medium 72 to 89Kg
(84 to 104g/m2)22 22 22 5
MediumHeavy
90 to 103Kg
(105 to 120g/m2)
18 18 18 4
Heavy 104 to 110Kg
(121 to 128g/m2)
15 15 15 3
UltraHeavy1 111 to 162Kg
(129 to 188g/m2)
12 12 12 3
UltraHeavy2 163 to 186Kg
(189 to 216g/m2)
12 12 12 3
UltraHeavy3 187 to 220Kg
(217 to 256g/m2)
10 10 10 2
UltraHeavy4 221 to 275Kg
(257 to 320g/m2)
10 10 10 2
UltraHeavy5 276 to 310Kg
(321 to 360g/m2)
10 N/A 10 N/A
Color/
Monochrome Printing
Letter
LEF
(*1)
Auto 45 to 310Kg
(52 to 360g/m2)44.5〜17.5(*2) 44.5〜17.5(*2) 44.5〜17.5(*2) (Approx. same as A4LEF)
UltraLight 45 to 54Kg
(52 to 63g/m2) 44.5(*2) N/A 44.5(*2) N/A
Light 55 to 59Kg
(64 to 68g/m2) 44.5(*2) 44.5(*2) 44.5(*2) (Approx. same as A4LEF)
MediumLight 60 to 71Kg
(69 to 83g/m2) 44.5(*2) 44.5(*2) 44.5(*2) (Approx. same as A4LEF)
Medium 72 to 89Kg
(84 to 104g/m2)
39.5 39.5 39.5 (Approx. same
as A4LEF)
MediumHeavy
90 to 103Kg
(105 to 120g/m2)
31.5 31.5 31.5 (Approx. same
as A4LEF)
Heavy 104 to 110Kg
(121 to 128g/m2)
26.5 26.5 26.5 (Approx. same
as A4LEF)
UltraHeavy1 111 to 162Kg
(129 to 188g/m2)
21.5 21.5 21.5 (Approx. same
as A4LEF)
UltraHeavy2 163 to 186Kg
(189 to 216g/m2)
21.5 21.5 21.5 (Approx. same
as A4LEF)
UltraHeavy3 187 to 220Kg
(217 to 256g/m2)
17.5 17.5 17.5 (Approx. same
as A4LEF)
UltraHeavy4 221 to 275Kg
(257 to 320g/m2)
17.5 17.5 17.5 (Approx. same
as A4LEF)
UltraHeavy5 276 to 310Kg
(321 to 360g/m2)
17.5 N/A 17.5 N/A

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Table3-1c.Plain-paper Print Speeds (In case Spot-color Clear) (Accuracy within ±3%)
Mode Paper
Size Media Weight
Paper Weight
(Basis Weight)
Speed (ppm)
1st-Tray,
One-sided Printing
Speed (ppm)
1st-Tray,
Two-sided Printing
Speed (ppm)
MPT,
One-sided Printing
Color/
Monochrome Printing
A4 LEF
(*1)
Auto 45 to 310Kg
(52 to 360g/m2)18 18 18
UltraLight 45 to 54Kg
(52 to 63g/m2)18 N/A 18
Light 55 to 59Kg
(64 to 68g/m2) 18 18 18
MediumLight 60 to 71Kg
(69 to 83g/m2)18 18 18
Medium 72 to 89Kg
(84 to 104g/m2)18 18 18
MediumHeavy
90 to 103Kg
(105 to 120g/m2)
18 18 18
Heavy 104 to 110Kg
(121 to 128g/m2)
18 18 18
UltraHeavy1 111 to 162Kg
(129 to 188g/m2)
18 18 18
UltraHeavy2 163 to 186Kg
(189 to 216g/m2)
18 18 18
UltraHeavy3 187 to 220Kg
(217 to 256g/m2)
18 18 18
UltraHeavy4 221 to 275Kg
(257 to 320g/m2)
18 18 18
UltraHeavy5 276 to 310Kg
(321 to 360g/m2)
18 N/A 18
Color/
Monochrome Printing
A3
Auto 45 to 310Kg
(52 to 360g/m2)10 10 10
UltraLight 45 to 54Kg
(52 to 63g/m2)10 N/A 10
Light 55 to 59Kg
(64 to 68g/m2) 10 10 10
MediumLight 60 to 71Kg
(69 to 83g/m2)10 10 10
Medium 72 to 89Kg
(84 to 104g/m2)10 10 10
MediumHeavy
90 to 103Kg
(105 to 120g/m2)
10 10 10
Heavy 104 to 110Kg
(121 to 128g/m2)
10 10 10
UltraHeavy1 111 to 162Kg
(129 to 188g/m2)
10 10 10
UltraHeavy2 163 to 186Kg
(189 to 216g/m2)
10 10 10
UltraHeavy3 187 to 220Kg
(217 to 256g/m2)
10 10 10
UltraHeavy4 221 to 275Kg
(257 to 320g/m2)
10 10 10
UltraHeavy5 276 to 310Kg
(321 to 360g/m2)
10 N/A 10
Color/
Monochrome Printing
Letter
LEF
(*1)
Auto 45 to 310Kg
(52 to 360g/m2)17.5 17.5 17.5
UltraLight 45 to 54Kg
(52 to 63g/m2) 17.5 N/A 17.5
Light 55 to 59Kg
(64 to 68g/m2) 17.5 17.5 17.5
MediumLight 60 to 71Kg
(69 to 83g/m2) 17.5 17.5 17.5
Medium 72 to 89Kg
(84 to 104g/m2)
17.5 17.5 17.5
MediumHeavy
90 to 103Kg
(105 to 120g/m2)
17.5 17.5 17.5
Heavy 104 to 110Kg
(121 to 128g/m2)
17.5 17.5 17.5
UltraHeavy1 111 to 162Kg
(129 to 188g/m2)
17.5 17.5 17.5
UltraHeavy2 163 to 186Kg
(189 to 216g/m2)
17.5 17.5 17.5
UltraHeavy3 187 to 220Kg
(217 to 256g/m2)
17.5 17.5 17.5
UltraHeavy4 221 to 275Kg
(257 to 320g/m2)
17.5 17.5 17.5
UltraHeavy5 276 to 310Kg
(321 to 360g/m2)
17.5 N/A 17.5

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(Note1 ) When Paper size is A4SEF(LetterSEF), to prevent damage due to abnormally high temperature of the fuser
end and may be migrating to the intermittent printing of continuous printing . So as not to migrate as much as possible
in this intermittent printing , the panel "Menus" - “PrintAdjust”- You can choose the mode that dropped the printing
speed by selection in the "Paper speed narrow " . There is a "normal " and " slow" choices , respectively , is a mode in
which you want to print at (A4LEF(LetterLEF) conversion ) 40ppm, 35ppm. The default is "slow" . However , very thin
paper paper thicker than (UltraLight) ~MediaWeight this mode is applicable only (Heavy).
( Note2 ) When equipment installation environment of <16℃, print speed is down . I shall be down to 40ppm in A4LEF
conversion (22ppm in A3 conversion, 39.5ppm in LetterLEF). However, Media Weight is only when " MediumLight
( plain paper ) " setting " UltraLight ( very thin paper ) " - . For Auto, only if it detects the thickness of UltraLight ~
MediumLight equivalent , it is assumed that the speed down as well.
(Note3 ) Pro9541WT does not support duplex printing.
Table 4-1a. Special-paper Print Speed, In case Spot-color nothing and Spot-color White.
(Accuracy within ±5%)
Mode
Media Media Type Print Speed (ppm) -
MPT,Simplex
Color/
Monochrome
Printing
Labels (SEF) Labels 1 Labels 1 16
Labels 2 Labels 2 12
Envelope
JIS Chou #3
Envelope ENV 22
JIS Kaku #2
Envelope ENV 10
Postcard (SEF）
Post Card Post Card 27
Return post card Return post card 22
Table 4-1b. Special-paper Print Speed, In case Spot-color Clear.
(Accuracy within ±5%)
Mode Media Media Type Print Speed (ppm) -
MPT,Simplex
Color/
Monochrome
Printing
Labels (SEF) Labels 1 Labels 1 12
Labels 2 Labels 2 12
Envelope
JIS Chou #3
Envelope ENV 22
JIS Kaku #2
Envelope ENV 10
Postcard (SEF)
Post Card Post Card 22
Return post card Return post card 18
(6) First-printout Time (Engine Performance)
The ‘first-printout time’of C911/C931/C941/Pro9541WT means the time between the start of
printing of paper on the printerand the complete output of the paper from the exit roller of
the face-down paper output tray of the printer.
Table 5. First-printout Time The condition is 25℃
Printing more Media size Tray1
(max sec)
Tray2
(max sec)
Tray3
(max sec)
Tray4
(max sec)
Tray5
(max sec)
MPT
(max sec)
Monochrome／Color
50 ppm *1 A4 LEF(Plain)
8.0 8.5 9.0 9.5 10.0 8.0

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Note1) When media weight fixed within Ultra-Light to Medium-Light, and spot-color print don't use.
(7) Warm-up Time
The warm-up time of C911/C931/C941/Pro9541WT is the time between the power-off, or
power-saving, state and running state of the printer. During the warm-up time, the printer
does not print.
Condition Warm-up time (max.) *1
Cold Start (from Power-off State): approx. 50 seconds
Wake-up (from Power-saving Mode): approx. 35 seconds
Note1) : condition : 25oC, Humidity＜65%RH and nominal line voltage
Except for changing the supply units.
Except for density correction and color correction.
In case of Network environment etc, it is possible to change the warm-up time.
2.1.2 Print Media Specifications
(1) Requirements for Print Paper
The paper used for C911/C931/C941/Pro9541WT is cut-sheet plain paper and special paper
specified. The paper handling performance of the printer is optimized for basic paper,
which is:
- Excellent WhiteA4, 70 kg (82 gsm) and PPR-CA4NAin type name.
All the print media used for the printer should be 210-˚C, 0.2-second, 25-psi fusing process
temperature and pressure proof.
If printing on the following paper, thoroughly test the print quality and paper feeding
performance ,and confirm that there are no problems before use.
Embossed, glossy or coated paper;
The following paper should not be used for the printer:
Paper with too-smooth or rough (textured or fibered) surfaces, or differently textured
front and back surfaces;
Too light or too heavy paper, or paper with many powdery paper chips;
Wet or damp paper;
Paper with static cling;
Grained, embossed or coated paper;
Non-heat-proof paper having surfaces treated with glue or chemicals;
Paper with binding holes, perforations, cuts or holes;
Paper having cut edges with projections, depressions or burrs;
Paper with non-rectangular or right-angled corners;
Creased, warped, corner-folded, wavy, folded or torn paper;
Paper with fasteners, including staples, clips, ribbons, tape and metal;
Special paper, including carbon paper, non-carbon paper, thermal paper and
pressure-sensitive paper.
Thermal transfer printer paper, wet PPC paper, Japanese paper, multipart form paper or
ink-jet paper.
Note 1: The printer may produce a thin film of toner over heavy paper when it prints the
paper or, on heavy paper, may print images lighter than user-specified ones.
Note 2: Paper of which predominant fiber orientation is not vertical to its edge the printer
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feeds first may be jammed in the printer.
Note 3: Paper that was once printed on an electrophotographic printer, thermal transfer
printer or ink-jet printer should not be used for the printer.
Note 4: The front surface of paper is indicated on its wrapper. Paper sheets should be
loaded on the printer so as that their front surfaces are print surfaces.
Note 5: Paper is wrapped in damp-proof paper to be prevented from becoming damp.
Unwrapped paper should be used up on the printer early.
(2) Requirements for Auto-feeder Tray Print Paper
The following paper can be fed from the standard auto feeder tray (the 1st tray) of and one
optional auto feeder tray (the 2nd tray) and Three optional auto feeder tray (the 2nd/3rd/4th
tray). Postcards, envelopes and labels can be fed only from the MPT of the printer.
Transparency can be fed only from the MPT and 1st tray of the printer.
(a) Paper Weights
The 1st tray , The Extension tray (Option) : 45- to 275-kg ( 52- to 320-g/m2)
(b) Standard Paper
The paper shown in table 6 is the print media for which the print performance of the
auto feeder trays of C911/C931/C941/Pro9541WT is specified. Using the standard
paper shown in the table 6 is recommended.
Table 6. Standard Paper
Paper Type Name Paper
Size
Paper Weight
(Basis Weight)
<Bond> Description
Basic
Paper Excellent White Type name:PPR-CA4NA A4 LEF 297x210 70Kg （82g/m2）Specified paper for color printing.
Plain
Paper Excellent Paper Type name:PPR-DA4TDB
A4 LEF
297x210 55Kg （64g/m2）Generally specified paper for monochrome printing.
c) Types and sizes of plain paper and recycled paper
Paper types shown in table 7 can be used. See 2.1.3, 1), d) for paper sizes that can be
used with auto feeder trays.
Table 7. Paper Types that Can Used for Auto Feeder Trays
Paper Type Name Description
Plain Paper
High-quality paper for
electrophotographic copy
printers
45- to 275-kg weight (52- to 320-g/m
2
basis weight), approximately 0.08- to
0.32-mm thickness paper for monochrome and color electrophotographic
printers that use toner.
Recycled
Paper Recycled paper for electrophotographic copying 45- to 275-kg weight (52- to 320-g/m
2
basis weight), approximately 0.08- to
0.32-mm thickness recycled paper used for general copiers that use toner.
d) Transparencies
Transparencies can be fed only from a standard auto feeder tray (1st tray) and an MPT
tray. The following should be used:
•A4orletter size transparencies;
•Transparencies made for electrophotographic printers or dry PPCs;
•Transparencies that do not melt, alter in quality or warp, in printer’s thermal fusing
processes; and
•0.10-to0.125-mmthickness transparencies.
Recommended transparencies are as follows: CG3600 (A4 or letter size, by 3M)
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Note 1) Transparencies may become wavy after they are printed.
Note 2) A thin film of toner may be printed over transparencies, or images printed on
transparencies may be lighter than those user-specified.
Note 3) Transparencies may lower the fusibility of toner.
Note 4) Transparencies with slippery coatings may not be fed.
Note 5) Output print quality may degrade on transparencies, which are made of
transparent plastic.
Note 6) Using non-recommended transparencies for a printer may cause failure of the
printer.
e) Postcards
Postcards can be fed only from a standard auto feeder tray (1st tray) and an MPT.
Japanese postal cards and non-folded Japanese double postal cards can be used.
Table8．Postcard Specifications
Size
Japanese
Postal Card Single: 100mm x 148mm General postal cards except for ink-jet printing or with photographs attached on them
Japanese
Postal Card Double: 148mm x 200mm General postal cards except for ink-jet printing or with photographs attached on them
The following postcards should not be used:
•Japanese postal cards for ink-jet printing;
•2-mm or more warped postcards;
•Postcardswithstamps;or
•Postcardsprinted with photographs.
Note 1) Postcards may become warped after they are printed.
Note 2) A thin film of toner may be printed over postcards or images printed on postcards
may be lighter than those user-specified.
Note 3) Postcardsmaylowerthe fusibility of toner.
Note 4) Pro9541WT is not supported Postcards.
Double Single
(f) Labels
Labels can be fed from the Auto-feeder Tray and the MPT of C911/C931/C941.
Labels meeting the following conditions should be used for the MPT:
•The sheets of the labels are A4,B5 and letter size.
•The labels are electrophotographic printer or dry PPC ones that do not deform, and of
which glue or base paper do not deform, by heat;
•The labels do not peel from their base paper in the thermal fusing process of the

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printer.
•The labels do not peel, by passing through the printer, from their base paper.
•The thicknesses of the labels and their base paper are 0.1 to 0.2 mm.
•The labels cover throughout their base paper, no glue being squeezed out of them.
The following is the recommended labels for the MPT.
: ＬＢＰ−F７１××series (of Kokuyo, A4)
: ＬＢＰ−Ｆ650 (of Kokuyo, B5)
: White Laser Label 5161 (of Avery, Letter)
: White Laser Label 7162,7664,7666 (of Avery, A4)
Note 1: The printer may produce a thin film of toner over labels when it prints them or,
on labels, may print images lighter than user-specified ones.
Note 2: The toner fusibility of the printer may be lowered.
Note 3：Pro9541WT is not supported Labels.
g) Glossy-finish paper
Glossy-finish paper can be fed only from a standard auto feeder tray or an MPT.
Glossy-finish paper meeting the following requirements should be used. Glossy-finish
paper must:
•Bemadeintended for use on electrophotographic printers or dry PPCs;
•Does not melt, change in quality, or warp, in printer thermal fusing processes; and
•Be0.13 to 0.16 mm thick.
Recommended glossy-finish paper is:
: Excellent Gloss (A4, A3, or A3Nobi size) (for Oki color printers).
: JD Coat 127/157 (A4,A3 or SRA3) (when using spot-color clear )
Note 1) Inahigh temperature and high humidity environment, a thin toner film is likely to
be printed on white print of glossy-finish paper and the paper cannot be used.
(The paper can be used in an environment below 25°C temperature and 60%
humidity.)
Note 2) Compared with plain paper, glossy-finish paper may often be printed with a thin
toner film over it, or may be printed with lighter images. Priortousethe paper, it
must be printed and checked for proper image quality printed on it, and for its
proper feedability.
Note 3) Glossy-finish paper may lower the fusibility of toner. Images deviated from
positions to print may be printed on lightweight glossy-finish paper.
Note 4)Glossy-finish paper may slip e.g. because of its coatings and not be fed.
Note 5) Pro9541WT is not supported Glossy paper.
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h) Transfer paper
Transfer Paper can be fed from a standard auto feeder tray or an MPT.
However, When transfer paper is printed, it is recommended to set the media one by
one on the MP tray for printing.
Transfer paper of the type shown in Table 8a is recommended.
Note 1) Support only with Pro9541WT.
Table8a．Transfer paper Specifications
Paper Type Name Description
Transfer
Paper Forever Laser-Dark
(No-Cut) LowTemp，
Forever Laser Light
(No-Cut)
Neenah IMAGE CLIPR
LaserDark
Neenah IMAGE CLIPR
LaserLight
Shockline
FC TOPDARKNEW
Shockline
FC TOPCUT2016
TMT WoW7.8
TMT T.One
Printing the transfer paper with dedicated CMF setting.
For troubleshooting of transfer paper,
See troubleshooting.
(3) Requirements for MPT Paper
The paper that can be fed from an MPT installed as standard in
C911/C931/C941/Pro9541WT is as described below.
The print media that can be fed from the auto feeder cassettes of the printer can all be fed
from the MPT. Besides, the MPT can feed postcards, labels and envelopes.
(a) Paper Weights
45 to 310kg (52 to 360g/m2)
(b) Standard Paper
The paper shown in table 6 is given for specifying the print performance of the MPT of
C911/C931/C941/Pro9541WT, as well as the auto feeder trays of the printer. Using for
the MPT the standard paper shown in the table is recommended.
(c) Types and Sizes of Plain Paper and Recycled Paper
The paper types shown in table 9. See 2.1.3, (2) for the paper sizes and capacities that
can be used for the MPT of C911/C931/C941/Pro9541WT.
Table 9. Paper Types that can be Used for MPT
Paper Type Name Description
Plain Paper
High-quality paper for
electrophotographic copy
printers
45- to 310-kg weight (52- to 360-g/m
2
basis weight), approximately 0.08- to
0.36-mm thickness paper for monochrome and color electrophotographic
printers that use toner.
Recycled
Paper
Recycled paper for
electrophotographic
copying
45- to 310-kg weight (52- to 360-g/m2basis weight), approximately 0.08- to
0.36-mm thickness recycled paper used for general copiers that use toner.
d) Transparencies
The same requirements for auto feeder trays are applied. See 2.1.2, 2), d) for the
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requirements.
e) Postcards
The same requirements for auto feeder trays are applied. See 2.1.2, 2), e) for the
requirements.
Double Single
Figure 3. PostcardOrientations (MPT)
(f) Labels
Labels can be fed only from an MPT tray. The following labels should be used:
(g) Glossy-finish paper
The same requirements as for auto feeder trays are applied. See 2.1.2.2)-g).
(h) Envelopes
Envelopes can be fed only from an MPT. Envelopes to be used should not have
deformations, including twists and curls.
Envelopes shown in table 12 and meeting the following requirements should be used:
•Kraft, electrophotographic printer or dry PPC paper;
•Chou envelopes: 85-g/m2basis weight paper, with a neatly folded flap;
•You envelopes: 85-g/m2basis weight paper, with a neatly folded flap; and
•COM-10, DL, C4, C5: 24-lb. paper, with a neatly folded flap.
(Fold the flaps of envelopes with glue on the flap)
Recommended envelopes:
Chou 3, 85-g/m2Kraft, end-opening (N3S-108 by Imura Envelope)
COM-10, Super bright 24-lb. white wove (by Quality Park)
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Table 10. UsableEnvelope Sizes
Envelope Type Size
Chou 3 120mm x 235mm
Chou 4 90mm×205mm
Chou 40 90mm×225mm
You 0 235mm x 120mm
You 2(C6) 162mm x 114mm
You 4 235mm x 105mm
YouChou 3 120mm x 235mm
Kaku 2 240mm x 332mm
Kaku 3 216mm x 277mm
Kaku 6 162mm x 229mm
Kaku 8 119mm x 197mm
C4 324mm x 229mm 12.76”x 9.02”
C5 229mm x 162mm 9.02”x 6.38”
DL 220 mm x 110 mm 8.66”x 4.33”
COM-9 225.4mm x 98.4mm 8.875”x 3.875 “
COM-10 241.3mm x 104.8mm 9.50”x 4.125”
Monarch 190.5mm x 98.4mm 7.5”x 3.875”
Kaku 2
Chou 3, Chou 4, Chou 40
,
Kaku 3, Kaku 6, Kaku 8
You 0, You 2, You 4,
Chou You3 COM-9,COM-10,
DL, C4, C5, Monarch
Figure 4. EnvelopeOrientations
The following envelopes should not be used:
•Too-thickorplasticenvelopes;
•Double envelopes, which have an inner envelope;
•Envelopes with fastening metal, buttons or windows;
•Envelopes having flaps backed with an adhesive or double-faced tape;
•Creased or warped envelopes;
•Envelopes with stamps; or
•Matte-finished or embossed envelopes.
Note 1) Envelopes may become warped or creased after they are printed.
Note 2) A thin film of toner may be printed over envelopes, or images printed on labels
may be lighter than those user-specified.
Note 3) Envelopes may lower the fusibility of toner.
Note 4) Output print quality may degrade within approximately 5 mm of an envelope
joint (a thickness change line).
Note 5) The printer may feed envelopes with thick folds improperly..
Note 6) Pro9541WT is not supported Envelopes.

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i) Transfer paper
The same requirements as for auto feeder trays are applied. See 2.1.2.2)-h).
(4) Storing Paper
While stored in poor condition, paper may absorb damp, change in color or warp. Note
such paper has adverse effects on the print quality printed on, and the feeding of, it from
C911/C931/C941/Pro9541WT. Paper should not be unpacked until actually used on the
printer.
Paper used for the printer should be stored:
•In a dark, less-damp area, such as bookshelves;
•On a flat table; and
•In an environment of 20˚C (68˚F) temperature and 50% relative humidity.
Avoid storing the paper:
•Directly on a floor;
•In an area exposed to direct sunlight;
•Near the inside surfaces of outside walls;
•In an area having different surface levels, or a bent area;
•In an area where static electricity develops;
•In an area where the temperature excessively rises or suddenly changes;
•Near copiers, air conditioners, heaters or ducts; or
•In an excessively high-humidity area.
Note) Paper that was left for a long time may not be printed properly on the printer.
(5) Media Size Limit
Refer to following table for the limit of media size.
Input Output
MPTray Tray1 Tray2〜5 Duplex 2pass Face
Up Face Down
Width 64 –330 mm
2.5 –13.0 inch
99 –330 mm
3.9 –13.0 inch
99 –330 mm
3.9 –13.0 inch
99 –330 mm
3.9 –13.0 inch
99 –330 mm
3.9 –13inch Same
range of
MPTray
Same range
of Tray1
Length
89 –1321 mm
3.5 –52.0 inch
147 –457 mm
5.8 –18.0 inch
147 –457 mm
5.8 –18.0 inch
147 –483 mm
5.8 –19.0 inch
180 –457 mm
7.1 –18.0 inch
147 –1321 mm
5.8 –52.0 inch
2.1.3 Paper Input/Output Specifications
The paper specified in this document should be fed in the following orientations to
C911/C931/C941/Pro9541WT.
(a) PlainPaper: SEF or LEF for A4, A5, B5, Letter, 16K(3 types) and SRA4 size. SEF is
the other sizes.
(b) Labels: SEF or LEF forA4. （Not supported for Pro9541WT）
(c) Envelopes: See figure 4. （Not supported for Pro9541WT）
(d) Postcards: SEF. （Not supported for Pro9541WT）
(1) Auto Feeder Trays
(a) Paper Cassettes
2
4