OKI C - Recent Questions, Troubleshooting & Support

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Fatal Error 121

My OKI C5800LDN printer displayed the Service 121 error last night. After reading the previous solutions, and trying them with no success, I followed the instructions in the service manual, and removed the High Voltage Power Supply Board. There are four cables that plug into the board, the rest of the electrical connections are made between spring loaded fingers that make contact directly with the board when snapped into place. I used a rubber eraser to carefully polish each one of the fingers and their connections points on the circuit board. I re-installed the board, and the error is gone.
3/29/2022 8:19:14 PM • OKI C5800Ldn Led... • Answered on Mar 29, 2022
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(oki C5510 MFP) when we scan it creates a PDF

Compress any PDF file is not that difficult now, now there are many online tools available that can do this job easily, just Google 'Compress PDF online' and you will get many websites available, you can use any of them. Nowadays there is a website ' compresspdf.io ', which I use a lot but before I was using 'SmallPDF.com', but I liked the results of this new website, you can use either of them, both websites are very good.
9/8/2020 11:56:45 AM • OKI C5510 MFP... • Answered on Sep 08, 2020
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I have an Oki C3400 that wont print

Could very well be the sensor window. I suggest looking at the side of the drum on the right side and pushing a q tip into the opening. heres an older model thats sort of similar instructions. http://www.c3400.co.uk/index.asp?menumode=0&content=sensorerror
Also you can check the exact error code here. http://www.okic3400.co.uk/library/downloads/utilities/c3300c3400smv1115.exe
3/2/2020 7:58:53 PM • OKI C3400n Laser... • Answered on Mar 02, 2020
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Toner sensor error 413K displayed

In the side of the blue handle on the toner there should be a window that has a white flag inside it. the surface of the flag may be dirty and require cleaning. alternatively, there is a sensor opposite this in the side of the printer that "looks" for the white flag moving during the startup sequence that may also require cleaning. K in the code would indicate K or black toner is the one to be checking.
6/11/2019 8:47:54 AM • OKI C5250n... • Answered on Jun 11, 2019
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Black printing blurry

Clean the laser scanners
9/30/2018 9:39:53 PM • OKI C5650n LED... • Answered on Sep 30, 2018
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413 k toner empty

413 k toner empty
9/1/2018 5:06:46 PM • OKI C5500n... • Answered on Sep 01, 2018
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Fatal error 980 OKI C5500 printer

I had a paper jam and removed the jammed papers. The paper jam cleared and then the Fatal Error 980 appeared. OKI C5500 printer
8/17/2018 2:32:09 PM • OKI C5100n Laser... • Answered on Aug 17, 2018
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OKI C9600hdn fatal error 133

My OKI C9600 printer has problem related to led head with error code 133. This error msg indicates Cyan led head is failed. There are some reasons that leading to this failure. One of them might be caused by drum. If drum is dirty or is overflown by toner. So you may test C Led head to know it is OK or not. How to test ? Try changing with another Led Head such as Y,K, M. This is the way I did, and my printer is OK now.
6/30/2018 4:01:44 PM • OKI C9600hdn... • Answered on Jun 30, 2018
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Error 163 on oki c5500 printer

163 Toner Sensor Error, Color: Black An error has been detected in your printer's Toner Sensor.1 Machine Check Exception A problem has been detected in the printer hardware2 DSI Exception The printers main logic has attempted to look up an invalid address.3 ISI Exception The printers main logic has attempted to read the next instruction, which has failed to execute for some reason. 4 Alignment Exception The printers main logic cannot access the memory for some reason. 5 Program Exception The printers main logic has issued an exception code. 6 Floating-point Unavailable Exception A floating-point instruction is executed when the MSR floating point enable bit is set to Disable.7 Instruction Address Breakpoint Exception The printers main logic has attempted to look up an invalid address.20 CU ROM Hash Check Error 1 CU ROM hash check error has been found. Check reproducibility if possible.21 CU ROM Hash Check Error 2 The printers CPU has a checksum error in it's memory.23 CU ROM Hash Check Error (resident) Seek service if restarting the printer does not correct the problem. 25 CU ROM Hash Check Error (DIMM2) Seek service if restarting the printer does not correct the problem.30 CU Slot1 DIMM RAM Check Error An error has been detected in operation checks on the RAM in slot 131 CU Slot2 DIMM RAM Check Error An error has been detected in operation checks on the RAM in slot 235 Slot1 RAM Spec Error Check the specification and install in slot 1 RAMs supported by the product40 CU EEPROM Error The EEPROM mounted on the CU board needs to be replaced 41 CU Flash Error The CU Flash needs to be replaced 43 Flash File System Version Mismatch Seek Service if restarting the printer and initialising the flash memory does not correct the problem42 Flash File System Error Seek Service if restarting the printer and initialising the flash memory does not correct the problem 43 PS Flash File System Error An Flash Memory error has occured and the printer needs to be serviced if restarting the printer does not correct the problem51 CU Fan Error The CU cooling fan needs to be replaced if restarting the printer does not correct the problem 70 Postscript Failure An error has been detected in your printer's Postscript Core. 72 Engine Communication Error A communications error has occurred between CU and PU boards.73 H/W Overrun Detect An error has been detected in your printer's hardware input area.74 F/W Overrun Detect Occurs when the firmware is unable to set video data in response to video DMA's data request.75 VIC Limiter An error has been detected in your printer's 80 Parameter I/O Error An error has been detected in your printer's Input/Output area.81 Parameter Consistency Check Error The EEPROM and flash memory reformatted and initialized.102 Engine RAM Error An error has been detected in your printer's engine RAM. 103 Engine SRAM Error An error has been detected in your printer's engine SRAM. 104 Engine EEPROM Error An error has been detected in your printer's engine reading/writing the EEPROM at power-up.105 Engine EEPROM Missing Error An error has been detected in your printer's Engine 106 Engine Control Error An error has been detected in your printer's Engine Controller. 122 Power Supply Fan Motor Error An error has been detected in your printer's Power Supply Fan Motor. 123 Humidity Sensor An error. has been detected in your printer's Humidity Sensor 124 Temperature Sensor An error has been detected in your printer's Temperature Sensor. 127 Fuser Unit Fan Error An error has been detected in your printer's Fuser Unit Fan Error. 131 LED Head Missing, Color: Yellow When yellow LED head connection cannot be detected132 LED Head Missing, Color: Magenta When magenta LED head connection cannot be detected133 LED Head Missing, Color: Cyan When cyan LED head connection cannot be detected.134 LED Head Missing, Color: Black When black LED head connection cannot be detected.140 Drum Up/Down, Color: Yellow An error has been detected in your printer's Yellow Drum141 Drum Up/Down, Color: Magenta An error has been detected in your printer's Magenta Drum.142 Drum Up/Down, Color: Cyan An error has been detected in your printer's Cyan Drum. 150 Drum Fuse cut NG, Color: Yellow An error has been detected in your printer's Drum Fuse. 152 Drum Fuse cut NG, Color: Cyan An error has been detected in your printer's Drum Fuse. 153 Drum Fuse cut NG, Color: Black An error has been detected in your printer's Drum Fuse. 155 Fuser Unit Fuse cut NG An error has been detected in your printer's Fuser Unit.154 Belt Unit Fuse cut NG An error has been detected in your printer's Belt Unit.160 Toner Sensor Error, Color: Yellow An error has been detected in your printer's Toner Sensor. 161 Toner Sensor Error, Color: Magenta An error has been detected in your printer's Toner Sensor. 162 Toner Sensor Error, Color: Cyan An error has been detected in your printer's Toner Sensor. 163 Toner Sensor Error, Color: Black An error has been detected in your printer's Toner Sensor. 170 Upper Thermistor, State: Short An error has been detected in your printer's Upper Thermistor. 171 Upper Thermistor, State: Open Restart the printer. If the problem continues the printer will need to be serviced172 Upper Heat Temp, State: High An error has been detected in your printer's Upper Heat Temp. 173 Upper Heat Temp, State: Low Turn the printer off to let it cool down, then restart the printer.181 I/F Error, Loc. Duplex An error has been detected in your printer's Duplexer.182 I/F Error, Loc. Tray2 An error has been detected in your printer's Tray2.187 I/F Error, Loc. Control Pnale An error has been detected in your printer's Control Panel.190 System Memory Overflow An error has been detected in your printer's System Memory Overflow.191 Page Memory Overflow An error has been detected in your printer's Page Memory Overflow. 200 PU F/W download Check Sum Error Error during PU flash download 201 PU F/W Flash Write Error An error has been detected in your printer's PU F/W Flash Write Error.202 PU F/W Flash Data Missing An error has been detected in your printer's PU F/W download Check Sum Error. 203 Engine Page Sequences IMAGACK Error An error has been detected in your printer's Engine Page Sequences IMAGACK Error. 204 EnginePageSequences IMGSET Error An error has been detected in your printer's Engine Page Sequences IMGSET Error. 2005 Oki Data Americas, Inc.
3/28/2018 6:26:53 PM • OKI C5500n... • Answered on Mar 28, 2018
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On my oki 5150 the printed paper develops a crease

If the paper under the crease has print and the fold is "glued down", it is most likely to be a problem with the fuser. Try removing it and look for evidence of warping in the pressure roller. If the fuser looks clean and tidy, go to the other end at check over the paper tray and paper feed mechanisim. It is possible the paper is catching on something at the start of the process. This is most likely if there is print over the crease but not under the fold.
2/13/2018 9:36:03 PM • OKI C5150n Led... • Answered on Feb 13, 2018
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My Oki C310dn printer prints lines through everything.

You need to do s head clean. This could take 2 or 3 goes but should fix it you will find head clean in the maintenance settings. It eats the ink so only do as you need. let me know how it goes. Regards Craig
2/3/2018 6:52:15 AM • OKI C Office... • Answered on Feb 03, 2018
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Oki C5150n is printing only magenta. Very little traces of yellow, blue but no greens at all. Everything else is just magenta!

Since green is made of blue and yellow, I suspect you need a new yellow toner cartridge.
1/25/2018 12:48:34 AM • OKI C5100n Laser... • Answered on Jan 25, 2018
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I have am Oki Data

paper jam is a main issue in printer when you clear the paper jam normally a tiny piece of paper falls into the printer and the printer get stuck again to clear the printer of tiny piece remove the toner and use a light blower and blow away the piece of paper this should be done only after removing the power and the usb from the printer after cleaning connect the power and the usb and restart your computer
1/11/2018 1:28:32 PM • OKI C6100n Laser... • Answered on Jan 11, 2018
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Pc says could not connect printer to usb

Hi. You may have to reinstall driver software.
1/10/2018 2:41:08 PM • OKI C3400n Laser... • Answered on Jan 10, 2018
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