Oki C941dn C911dn/C931dn/C941dn Troubleshooting Guide
Oki C941dn Manual
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Oki C941dn manual content summary:
- Oki C941dn | C911dn/C931dn/C941dn Troubleshooting Guide - Page 1
User's Manual Troubleshooting/Daily Maintenance Manual Read for any points that are not understood, or for maintenance 1 Troubleshooting 2 Maintenance Index C911dn C931dn C941dn ES9411dn ES9431dn ES9541dn Store this manual carefully close to hand so it can be viewed at any time. - Oki C941dn | C911dn/C931dn/C941dn Troubleshooting Guide - Page 2
. Using C941/ES9541dn Separate Volume Spot Color Guide This guide explains how to set up the Spot Color kit and check the printer drivers, and how to print using Spot Color. Make sure to read before use. wTroubleshooting wMaintenance wConsumables, maintenance products, options, color management - Oki C941dn | C911dn/C931dn/C941dn Troubleshooting Guide - Page 3
zzReading the Manual Symbols Note zz These are cautions and restrictions for the correct operation of the printer. Make sure to read to avoid misoperation. Memo zz Knowledge of the information before using the printer is useful and can act as a reference. Reading is recommended. Reference zz These - Oki C941dn | C911dn/C931dn/C941dn Troubleshooting Guide - Page 4
Illustrations The printer illustrations used herein show the C931 model unless otherwise specified. Illustrations may differ from the actual product. Screens The images of the control panel and PC used herein are examples. The images may differ from actual products and screens. - 4 - - Oki C941dn | C911dn/C931dn/C941dn Troubleshooting Guide - Page 5
Inscriptions The following inscriptions are used in this manual. C911dn → C911 C931dn → C931 C941dn → C941 ES9411dn → ES9411 ES9431dn → → Windows 7 Mac OS X10.3.9 and above → Mac OS X The manuals enclosed with the printer use as examples Windows 7 in the case of Windows, and OS X 10 - Oki C941dn | C911dn/C931dn/C941dn Troubleshooting Guide - Page 6
Troubles 40 Unable to print...40 Printer driver malfunctions 44 Print quality is poor 47 Paper feed is poor 50 2 Maintenance 51 Replacing consumables and maintenance unit 52 Consumables and maintenance unit service life 52 When the replacement period is approaching 53 Replacing toner - Oki C941dn | C911dn/C931dn/C941dn Troubleshooting Guide - Page 7
Transporting and moving the device 86 When moving the device 86 Transporting the device 86 Index 87 - 7 - - Oki C941dn | C911dn/C931dn/C941dn Troubleshooting Guide - Page 8
- 8 - - Oki C941dn | C911dn/C931dn/C941dn Troubleshooting Guide - Page 9
Troubleshooting Maintenance Index 1 Troubleshooting 1 2 Troubleshooting solutions procedure...... 10 Paper jams 11 When a message related to paper appears 31 When a message related to replacement of consumables appears 33 When some other message appears...... 35 Printing Troubles 40 - 9 - - Oki C941dn | C911dn/C931dn/C941dn Troubleshooting Guide - Page 10
Maintenance Troubleshooting solutions procedure zzTroubleshooting solutions procedure 1 This chapter describes the procedure for solving the problems occurred while using the printer. If you are unable to solve the problem with this procedure, contact the designated customer service center - Oki C941dn | C911dn/C931dn/C941dn Troubleshooting Guide - Page 11
when a paper is jammed inside the printer, or when paper is 1 remaining inside the printer even after removing it. Troubleshooting Checking messages (if a paper jam occurs) When a paper is jammed inside the printer, or when paper is remaining inside the printer even after removing it, a message - Oki C941dn | C911dn/C931dn/C941dn Troubleshooting Guide - Page 12
Troubleshooting Maintenance Index Paper jams Error code 1 Category Message displayed (When the message does not disappear even after removing the jammed paper) Paper remains in the printer Open Right Side Cover Please see HELP for details Paper jam in the vicinity of Right Side Cover - Oki C941dn | C911dn/C931dn/C941dn Troubleshooting Guide - Page 13
jams 2 Press the scroll button . The next page will appear, and solution procedure for paper jam 1 and corresponding animation will be displayed. Troubleshooting 2 Maintenance 1 Press the [HELP] button. The error code will appear and the condition of paper jam will be displayed. Memo zz - Oki C941dn | C911dn/C931dn/C941dn Troubleshooting Guide - Page 14
Troubleshooting Maintenance Paper jams Removing jammed paper 1 Removing paper jam in the vicinity of Right Side Cover „„Error code: 380, 390, 637 2 1 If paper is set - Oki C941dn | C911dn/C931dn/C941dn Troubleshooting Guide - Page 15
6 Match the paper guide with the paper. 7 Set the print side for the removed paper to face up. Paper jams Removing paper jam in the output unit 1 „„Error code: 381, 638, 639 Troubleshooting CAUTION There is a risk of burns. Work carefully as the temperature of fuser unit is high. Ensure to - Oki C941dn | C911dn/C931dn/C941dn Troubleshooting Guide - Page 16
Troubleshooting Maintenance Paper jams 2 Check inside of the printer, and slowly remove the remaining paper. 1 5 unit's lock lever (blue). 4 Ensure to slowly pull the remaining paper towards the printer body (opposite to the paper feeding direction). 7 Hold the fuser unit handle with both hands - Oki C941dn | C911dn/C931dn/C941dn Troubleshooting Guide - Page 17
8 Remove the remaining paper. Paper jams 11 If paper is set in the MP tray, remove it and close the tray. 1 Troubleshooting 9 Hold the fuser unit handle with both hands, and set to the output unit. 2 12 Lift the opening( ), and open the right side cover. Maintenance - Oki C941dn | C911dn/C931dn/C941dn Troubleshooting Guide - Page 18
Troubleshooting Maintenance Paper jams 13 Slowly remove the remaining paper. 1 16 Match the paper guide with the paper. 2 14 Close the right side cover. 17 Set the print side for the removed paper to face up. 15 Open the MP tray. 18 Put the output unit back into the printer. Index - 18 - - Oki C941dn | C911dn/C931dn/C941dn Troubleshooting Guide - Page 19
is remaining paper in the fuser unit then pull up the fuser unit's jam release lever (blue). 1 Troubleshooting Maintenance 2 3 Ensure to slowly pull the remaining paper towards the printer body (opposite to the paper feeding direction). Index 4 Push down the fuser unit's jam release lever - Oki C941dn | C911dn/C931dn/C941dn Troubleshooting Guide - Page 20
Troubleshooting Maintenance Paper jams 5 If there is no remaining paper in the fuser unit then pull up the fuser unit's 1 lock lever (blue). 8 slowly pull the paper out in the opposite direction from the paper operation direction. 10 Put the output unit back into the printer. Index - 20 - - Oki C941dn | C911dn/C931dn/C941dn Troubleshooting Guide - Page 21
the 2-Sided Printing unit, lift it up a little with both hands, and remove it. Paper jams 3 Put the 2-Sided Printing unit back into the printer. 1 Troubleshooting 2 Maintenance Index Note zz Do not pull the 2-Sided Printing unit out in one shot. 2-Sided Printing unit may fall down if you pull - Oki C941dn | C911dn/C931dn/C941dn Troubleshooting Guide - Page 22
Troubleshooting Paper jams Removing paper from the vicinity of Right Side Cover 1 „„Error code: 391, 392, 393, 394, 395, 631, 632, 633, 634, 635 Example) In - Oki C941dn | C911dn/C931dn/C941dn Troubleshooting Guide - Page 23
you cannot see the jammed paper in the 2-Sided Printing unit inside the printer, put the 2-Sided Printing unit back into the printer and go to Step 4. Paper jams 3 Put the 2-Sided Printing unit back into the printer. 1 2 Troubleshooting Maintenance Index 2 Remove the remaining paper. - 23 - - Oki C941dn | C911dn/C931dn/C941dn Troubleshooting Guide - Page 24
Troubleshooting Maintenance Paper jams 4 Lift opener ( ) of the output unit, and pull out the output unit. 1 6 If the paper ). 2 7 Hold the fuser unit handle with both hands, and remove it onto a flat surface. 5 Check inside of the printer, and slowly remove the remaining paper. Index - 24 - - Oki C941dn | C911dn/C931dn/C941dn Troubleshooting Guide - Page 25
8 Hold the knob, pull up the transfer roller unit, lift the paper guide, and remove the remaining paper. Paper jams 9 Close the cover, push down the transfer roller unit. 1 Troubleshooting Maintenance 2 10 Hold the fuser unit handle with both hands, and set to the output unit. Index - 25 - - Oki C941dn | C911dn/C931dn/C941dn Troubleshooting Guide - Page 26
Troubleshooting Paper jams 11 Push down the fuser unit's lock lever (blue). 1 2 Removing paper from the vicinity of the lower side of the 2-Sided Printing unit, lift it up a little with both hands, and remove it. 12 Put the output unit back into the printer. 2 Remove the remaining paper from the - Oki C941dn | C911dn/C931dn/C941dn Troubleshooting Guide - Page 27
3 Put the 2-Sided Printing unit back into the printer. Paper jams 4 Lift opener ( ) of the output unit, and remove the remaining paper. 1 Troubleshooting 2 Maintenance Index If no paper remains in visible locations in the printer, follow the procedure given below. - 27 - - Oki C941dn | C911dn/C931dn/C941dn Troubleshooting Guide - Page 28
Troubleshooting Paper jams 5 If the paper tip is not visible, pull up the fuser unit's lock lever (blue). 1 7 Hold the knob, pull up the transfer roller unit, lift the paper guide, and remove the remaining paper. 2 6 Hold the fuser unit handle with both hands, and remove it onto a flat surface. - Oki C941dn | C911dn/C931dn/C941dn Troubleshooting Guide - Page 29
8 Close the cover, push down the transfer roller unit. Paper jams 11 Put the output unit back into the printer. 1 Troubleshooting Maintenance 2 9 Hold the fuser unit handle with both hands, and set to the output unit. Index 10 Push down the fuser unit's lock lever (blue). - 29 - - Oki C941dn | C911dn/C931dn/C941dn Troubleshooting Guide - Page 30
Troubleshooting roller dirty? ("Cleaning feed rollers"(P.83)) zzIs the paper guide set correctly? (Refer to "Setting the Paper in the printer installed on a flat and stable surface? zzAre you using the paper compatible with the printer? zzAre there any fragments of paper remaining inside the printer - Oki C941dn | C911dn/C931dn/C941dn Troubleshooting Guide - Page 31
paper appears When paper type/size set in the printer tray differs from the printer driver specification, message such 1 as "Replace paper" and "Paper size error has occurred" will appear, and the lamp will blink. Troubleshooting Messages related to paper and error codes, cause of - Oki C941dn | C911dn/C931dn/C941dn Troubleshooting Guide - Page 32
liquid crystal panel Error code lamp Causes and Troubleshooting 1 Paper size Remove Excess Paper Error Reduce the on paper which is of a different size from the specifications of the printer driver. To cancel printing, press the [CANCEL] button. If multiple errors occur - Oki C941dn | C911dn/C931dn/C941dn Troubleshooting Guide - Page 33
a message related to replacement of consumables appears 1 Troubleshooting When timing for replacement of consumables and maintenance items 5642 5643 5644 5645 lamp Causes and Troubleshooting Blinking Black Toner Empty Press the [HELP] button, and solve according to the guidance - Oki C941dn | C911dn/C931dn/C941dn Troubleshooting Guide - Page 34
ATTENTION> lamp Causes and Troubleshooting Reference pages 1 Image Toner Full 357 Toner Box Install New Waste Toner Box Please see HELP for details Blinking Waste toner is full. If you re-set and use a waste toner , but you must Go to User Manual "Trouble accept the risks of using non- - Oki C941dn | C911dn/C931dn/C941dn Troubleshooting Guide - Page 35
solve the problem according to the service center Troubleshooting Reference pages - Blinking A fatal error has occurred. - If the error is not resolved by restarting the printer data has [Advanced] > exceeded the memory capacity of the printer. [Print with In the Quality of printer driver - Oki C941dn | C911dn/C931dn/C941dn Troubleshooting Guide - Page 36
Error liquid crystal panel code lamp Causes and Troubleshooting Reference pages 1 Japanese [Cover] Opent "k" column 311 for details 6841 6842 use with this printer model. Use a toner cartridge intended for 6843 use in this printer model. 6845 6900 6901 6902 6903 6904 - Oki C941dn | C911dn/C931dn/C941dn Troubleshooting Guide - Page 37
5541 use with this printer model. 1 5542 Use a toner cartridge intended for Troubleshooting 5543 5544 use in this printer model. 5545 5500 installed - Reset Fuser Unit 320 correctly. Please see HELP for details Install the fuser unit correctly. Receiving Data Timeout 519 To turn off - Oki C941dn | C911dn/C931dn/C941dn Troubleshooting Guide - Page 38
Troubleshooting Reference pages 1 Japanese Check Data "t" column Message Data Write Error - - Failed to write the message data - to be updated. Check data If you do not want to change settings, return Spot Color toner, image drum and Spot Color duct settings to [MENUCOLOR]. Spot - Oki C941dn | C911dn/C931dn/C941dn Troubleshooting Guide - Page 39
can go, and close the toner cover. Troubleshooting [TRAY] cassette is missing 430 appears, then restarting the printer, contact your contact the customer service center designated help desk. , then print again. To turn and the print data was deleted. off the display, press OK Change - Oki C941dn | C911dn/C931dn/C941dn Troubleshooting Guide - Page 40
Troubleshooting Maintenance Index Printing Troubles zzPrinting Troubles 1 This section describes the possible troubles that may occur while operating the printer, and their solution procedure. Memo zz If the problem This printer is not set as default printer. Output port of printer driver is - Oki C941dn | C911dn/C931dn/C941dn Troubleshooting Guide - Page 41
address. Advanced Check that IP address of the printer does not - overlap with other IP address. Index USB Connection Problems „„Common for Windows/Mac OS X Cause Cable does not meet the standards. USB hub is used. Printer driver is not installed correctly. Solution procedure Use USB - Oki C941dn | C911dn/C931dn/C941dn Troubleshooting Guide - Page 42
Maintenance Index Printing Troubles Printer Troubles Memo 1 zz If the problem is not solved using the following explanation, contact your designated customer service centre. Symptom Cause Troubleshooting Reference pages Nothing is displayed in the Power supply cord is liquid - Oki C941dn | C911dn/C931dn/C941dn Troubleshooting Guide - Page 43
Troubles Symptom Cause Troubleshooting Reference pages Print data is not sent. LAN Cable/USB Cable is damaged. Connect a new cable. - 1 Troubleshooting print data. Select simple print data. - Display of the printer driver is Printer driver may not be Delete the printer driver once, - Oki C941dn | C911dn/C931dn/C941dn Troubleshooting Guide - Page 44
Troubleshooting Maintenance Printing Troubles Printer driver malfunctions 1 Memo zz If the problem is not solved using the following explanation, contact your designated customer service centre. zz For problems arising from the applications, contact the application development company. USB - Oki C941dn | C911dn/C931dn/C941dn Troubleshooting Guide - Page 45
Troubles „„Restrictions concerning Windows 7/Windows 8/Windows Vista/Windows 1 Server 2008 R2/Windows Server 2008/Windows Server 2012 Troubleshooting Item Symptom Causes and Troubleshooting Printer driver Help does not appear. The Help function is not supported by the PS printer driver - Oki C941dn | C911dn/C931dn/C941dn Troubleshooting Guide - Page 46
Pack 2 as an example. Description may differ for Windows Server 2003 Service Pack 1. 2 Item Symptom Causes and Troubleshooting Printer driver File cannot be printed when the printer is used as a shared printer on a network. On the server side, click [Start]>[Control panel]>[Trust Center - Oki C941dn | C911dn/C931dn/C941dn Troubleshooting Guide - Page 47
unclean. Low toner. Paper not supported. Wipe LED head with a soft tissue paper. Replace the toner cartridge. paper. Replace the toner cartridge. Use recommended paper. Printing Troubles 1 Troubleshooting Reference pages page of [Paper Change the value of [Printer or lines. Black Setting] or [ - Oki C941dn | C911dn/C931dn/C941dn Troubleshooting Guide - Page 48
Maintenance Index Printing Troubles Symptom 1 Stripes or dots appear periodically in horizontal direction. Paper feeding direction 2 Portion of white ground is lightly stained. Cause Troubleshooting In the case of cycle length of about 125 mm, image drum may be unclean or there - Oki C941dn | C911dn/C931dn/C941dn Troubleshooting Guide - Page 49
Troubles Cause Troubleshooting Reference pages Low toner. Replace the toner cartridge. page 55 1 Setting of [Black Finish] is not In the [Black Finish] of printer Advanced matching with the application. driver . customer service centre. Paper is moist. Paper not supported. Replace with a new - Oki C941dn | C911dn/C931dn/C941dn Troubleshooting Guide - Page 50
tray in [Paper Source] of the printer driver. Advanced Manual feeding is specified in Disable the Multipurpose tray is the printer driver. handled as manual feed setting. Advanced Device is not restored even after removing the jammed paper. Open the toner replacement cover - at once, and - Oki C941dn | C911dn/C931dn/C941dn Troubleshooting Guide - Page 51
Troubleshooting Maintenance Index 2 Maintenance 1 2 Replacing consumables and maintenance unit 52 Maintenance of the device 77 Transporting and moving the device...... 86 - 51 - - Oki C941dn | C911dn/C931dn/C941dn Troubleshooting Guide - Page 52
unit and their lifespan. Troubleshooting Consumables and maintenance unit service life Maintenance Index Ballpark indicator having toner on printable area of 1 page. Memo zz Number of printable pages/service life are reference values when using the printer under normal conditions. Service life - Oki C941dn | C911dn/C931dn/C941dn Troubleshooting Guide - Page 53
will appear and the lamp will blink. Troubleshooting Replace consumables and maintenance unit when "Replace ..." appears for details About 10,000 pages page 60 Waste Toner Box Waste Toner Near Full Waste Toner Full Install New Waste Toner Box Please see HELP for details About 5,000 - Oki C941dn | C911dn/C931dn/C941dn Troubleshooting Guide - Page 54
Index Maintenance Troubleshooting Replacing consumables and maintenance unit Replacing toner cartridges 1 WARNING ●● Do not throw toner or toner cartridge in fire. Toner may fly off causing burn injury. ●● Do not store toner cartridge in a place with fire. It may catch fire causing fire - Oki C941dn | C911dn/C931dn/C941dn Troubleshooting Guide - Page 55
. 1 Item Remarks Troubleshooting Toner Cartridge Only Black Toner Cartridge Only Yellow Toner Cartridge Only Magenta Toner Cartridge Only Cyan Toner cartridge Spot Color White Only for C941dn. Toner cartridge Spot Color Clear Can not be used in C911dn/ C931dn. 2 Maintenance Replacing - Oki C941dn | C911dn/C931dn/C941dn Troubleshooting Guide - Page 56
consumables appears"(P.33) of this manual. 8 Please support recycling of the used toner cartridges. Memo zz When disposing of the used toner cartridge in unavoidable circumstance, put it in a plastic bag, and ensure to dispose according to the instructions provided by the local municipality. Index - Oki C941dn | C911dn/C931dn/C941dn Troubleshooting Guide - Page 57
Replacing consumables and maintenance unit Replacing Image Drums „„Types of image drum 1 Troubleshooting Image drums that can be used with this printer are as follows. Item Remarks Image Drum Only Black Image Drum Only Yellow Image Drum Only Magenta 2 Image Drum Only Cyan Image drum - Oki C941dn | C911dn/C931dn/C941dn Troubleshooting Guide - Page 58
Troubleshooting Maintenance Replacing consumables and maintenance unit 4 Gently lift the handle (blue) upwards, and remove the image drum taking care 1 that your hand does not touch - Oki C941dn | C911dn/C931dn/C941dn Troubleshooting Guide - Page 59
and maintenance unit 8 Close the front cover. 1 Troubleshooting Maintenance 2 Memo zz If Error709 appears after replacing the image drum, refer to "When a message related to replacement of consumables appears"(P.33) of this manual. 9 Please support recycling of the used image drums. Memo zz When - Oki C941dn | C911dn/C931dn/C941dn Troubleshooting Guide - Page 60
The following belt units and transfer roller units can be used with this printer. Belt unit Item 2 1 New transfer roller unit is supplied with the new belt unit in the same package. 3 Remove the waste toner box. ‰‰[Replacing the Belt Unit] 2 Open the front cover. Maintenance Index - 60 - Oki C941dn | C911dn/C931dn/C941dn Troubleshooting Guide - Page 61
out the belt unit, hold the left-right label part (blue) and remove the belt unit. 1 Troubleshooting 2 Maintenance 5 Rotate the belt unit left/right lock lever knob (blue) to the left, and a vertical direction. - 61 - zz Ensure that waste toner does not spill when removing the belt unit. - Oki C941dn | C911dn/C931dn/C941dn Troubleshooting Guide - Page 62
Troubleshooting Maintenance Replacing consumables and maintenance unit 7 Remove belt unit. 1 10 Align the new belt unit and arrow label (red) of the printer, set it in the printer, and firmly press it inside. 2 8 Remove the new belt unit from its packaging. 9 Remove stopper from the belt unit - Oki C941dn | C911dn/C931dn/C941dn Troubleshooting Guide - Page 63
unit ‰‰[Replacing the transfer roller unit] 15 Lift opener ( ) of the output unit, and pull out the output unit. 1 Troubleshooting Maintenance 2 13 Set the waste toner box on the printer. Index 14 Close the front cover. 16 Pull up both tips of the transfer roller unit's lock lever (blue - Oki C941dn | C911dn/C931dn/C941dn Troubleshooting Guide - Page 64
lock lever (blue) down. 2 18 Remove transfer roller unit. 21 Put the output unit back into the printer. Maintenance Index 19 Set the new transfer roller unit to the output unit. 22 Please support recycling of the used belt unit and transfer roller unit. Memo zz When disposing of the used belt - Oki C941dn | C911dn/C931dn/C941dn Troubleshooting Guide - Page 65
units „„Types of fuser unit Following fuser units can be used with this device. Fuser unit Item Replacing consumables and maintenance unit 1 Troubleshooting Replacing fuser units 1 Prepare a new fuser unit. 3 Pull up the fuser unit's lock lever (blue). 2 CAUTION There is a risk of burns. Do - Oki C941dn | C911dn/C931dn/C941dn Troubleshooting Guide - Page 66
the new fuser unit from its packaging. 1 9 Please support recycling of the used fuser units. Memo zz When disposing of the used fuser unit in unavoidable circumstances, put it in a plastic bag, and ensure to dispose according to the instructions provided by the local municipality. 2 6 Hold the - Oki C941dn | C911dn/C931dn/C941dn Troubleshooting Guide - Page 67
toner boxes „„Types of waste toner box The following waste toner box can be used with this device. Waste Toner Box Item Replacing consumables and maintenance unit 1 Troubleshooting Replacing waste toner boxes 1 Prepare a new waste toner box. 3 Remove the waste toner box from the printer - Oki C941dn | C911dn/C931dn/C941dn Troubleshooting Guide - Page 68
Troubleshooting Replacing consumables and maintenance unit 4 Remove the new waste toner box from its packaging. 1 2 5 Install the new waste toner box to the printer. 7 Please support recycling of the used toner boxes. Memo zz When disposing of the used waste toner box in unavoidable - Oki C941dn | C911dn/C931dn/C941dn Troubleshooting Guide - Page 69
Replacing consumables and maintenance unit Replacing paper feed rollers Rough guide of replacing paper feed rollers is about 120,000 pages for each tray. 1 Troubleshooting „„Types of paper feed rollers The following paper feed rollers can be used with this device. Item Paper feed roller set - Oki C941dn | C911dn/C931dn/C941dn Troubleshooting Guide - Page 70
Troubleshooting Replacing consumables and maintenance unit 5 While expanding the claws of feed rollers ( ) in outside direction, remove 1 them from the axial. Memo zz When the feed - Oki C941dn | C911dn/C931dn/C941dn Troubleshooting Guide - Page 71
Troubleshooting Maintenance Index Replacing consumables and maintenance unit 7 Insert the new feed rollers ( ) in the axial, and firmly insert up to inside. 1 2 8 Similarly, insert the remaining two paper feed rollers ( , ). 9 Check that no paper feed roller is missing. - 71 - - Oki C941dn | C911dn/C931dn/C941dn Troubleshooting Guide - Page 72
power supply switch and start the printer. 12 Please support recycling of the used paper feed rollers. Memo zz When disposing of the used paper feed rollers in unavoidable circumstances, put them in a plastic bag, and ensure to dispose according to the instructions provided by the local municipality - Oki C941dn | C911dn/C931dn/C941dn Troubleshooting Guide - Page 73
4 Lift the opening( ), and open the right side cover. Replacing consumables and maintenance unit 5 While expanding the claws of feed rollers ( ) in outside direction, remove them from the axial. 1 Troubleshooting 2 Maintenance Index - 73 - - Oki C941dn | C911dn/C931dn/C941dn Troubleshooting Guide - Page 74
Troubleshooting Replacing consumables and maintenance unit 6 Lift Section A, release the claws in the direction shown in figure, and remove 1 the paper feed rollers ( ). 7 Pinch the claws ( - Oki C941dn | C911dn/C931dn/C941dn Troubleshooting Guide - Page 75
new feed rollers ( ) in the axial, and firmly insert up to inside while rotating them. 1 Troubleshooting Maintenance 2 11 Check that no paper feed roller is missing. 12 Close the right side cover. Index on the main power supply, press the power supply switch and start the printer. - 75 - - Oki C941dn | C911dn/C931dn/C941dn Troubleshooting Guide - Page 76
Troubleshooting Replacing consumables and maintenance unit 14 Please support recycling of the used paper feed rollers. 1 Memo zz When disposing of the used paper feed rollers in unavoidable circumstances, put them in a plastic bag, and ensure to dispose according to the instructions provided by - Oki C941dn | C911dn/C931dn/C941dn Troubleshooting Guide - Page 77
Maintenance of the device zzMaintenance of the device This section describes the cleaning method of the respective part of the device. 1 Troubleshooting Cleaning printer surfaces Cleaning LED heads Items to be prepared: Water or neutral washing agent, soft and dry cotton cloth 2 pieces Note - Oki C941dn | C911dn/C931dn/C941dn Troubleshooting Guide - Page 78
Troubleshooting Maintenance of the device 3 Open the front cover. 1 Note zz Ensure not to touch or damage the drum 2 4 Gently lift the handle (blue) upwards, and - Oki C941dn | C911dn/C931dn/C941dn Troubleshooting Guide - Page 79
5 Remove the waste toner box from the printer. Maintenance of the device 6 Push the center lever (blue) to the right. 1 Troubleshooting Maintenance 2 7 Rotate the belt unit left/right lock lever knob (blue) to the left, and push the lock lever towards yourself. Index - 79 - - Oki C941dn | C911dn/C931dn/C941dn Troubleshooting Guide - Page 80
Troubleshooting Maintenance please do not use them. 10 Set the belt unit to the printer, and push it in firmly. Note zz Removing the belt unit will not directly exposed to sunlight or fluorescent light. zz Ensure that waste toner does not spill when removing the belt unit. zz Never place the belt units - Oki C941dn | C911dn/C931dn/C941dn Troubleshooting Guide - Page 81
11 Raise the belt unit left/right lock lever, rotate the lock lever knob (blue) to the right and lock it. Maintenance of the device 13 Set the waste toner box on the printer. 1 Troubleshooting Maintenance 2 12 Return the center lever (blue) to the left. Index - 81 - - Oki C941dn | C911dn/C931dn/C941dn Troubleshooting Guide - Page 82
Troubleshooting Maintenance of the device 14 Align the image drum and arrow label (red) of printer, slowly insert in the slot 1 taking care that your hand does not touch the photoreceptor (green) below, and firmly push it inside. 16 Close the - Oki C941dn | C911dn/C931dn/C941dn Troubleshooting Guide - Page 83
for approximately 1s to switch off the power supply. 4 Pull out Tray 1. Maintenance of the device 1 Troubleshooting Maintenance 2 5 Wipe off the dirt on paper feed rollers (3 places) with the moist soft cloth. Memo main power supply, press the power supply switch and start the printer. - 83 - - Oki C941dn | C911dn/C931dn/C941dn Troubleshooting Guide - Page 84
Troubleshooting Maintenance of the device Cleaning the paper feed rollers of Multi-Purpose Tray 1 1 Press and hold the power switch for approximately 1s to switch off - Oki C941dn | C911dn/C931dn/C941dn Troubleshooting Guide - Page 85
Wipe off the dirt on paper feed rollers (2 places) and on separator with the moist soft cloth. 1 Troubleshooting Maintenance 2 8 Insert the feed rollers ( ) in the axial, and firmly insert up to inside while the main power supply, press the power supply switch and start the printer. - 85 - - Oki C941dn | C911dn/C931dn/C941dn Troubleshooting Guide - Page 86
Troubleshooting Maintenance Index Transporting and moving the device zzTransporting and moving the device 1 This section describes about transporting or moving the device. When moving the device Transporting the device CAUTION There is a risk of injury. The printer drum and toner cartridge, - Oki C941dn | C911dn/C931dn/C941dn Troubleshooting Guide - Page 87
Index 1 Troubleshooting Maintenance 2 Index - 87 - - Oki C941dn | C911dn/C931dn/C941dn Troubleshooting Guide - Page 88
Message 14 O Other troubles 40 Blurred print 47 Toner cartridge 55 Transfer roller unit 60 Waste toner box 67 Replacement timing 53 S Service life 52 T Toner cartridge 52, 53, 55 Transfer roller unit 60 Transportation and movement 86 Tray side cover 22 Troubleshooting 10 Troubleshooting - Oki C941dn | C911dn/C931dn/C941dn Troubleshooting Guide - Page 89
U USB connection 40 1 Basic cause 47 Troubleshooting Paper feeding 44 Power outage 40 Print quality 40 Printer driver 41 2 Right side cover 50 Maintenance W Waste toner box 52, 53, 67 Index - 89 - - Oki C941dn | C911dn/C931dn/C941dn Troubleshooting Guide - Page 90
Oki Data Corporation 4-11-22 Shibaura, Minato-ku,Tokyo 108-8551, Japan www.okiprintingsolutions.com 45582802EE Rev1
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Read for any points that
are not understood, or
for maintenance
1
Troubleshooting
2
Maintenance
Index
User’s Manual
Troubleshooting/Daily
Maintenance Manual
C911dn
C931dn
C941dn
ES9411dn
ES9431dn
ES9541dn
Store this manual carefully close to hand so it can be viewed at any time.