OKI C7350DN User Manual
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C7350/7550 User’s Guide: Troubleshooting • 521 Paper Jams Clearing Check additional paper trays If any optional paper tray(s) are installed: 6.Pull them out. Check that no paper is jammed along the various parts of the exit path. 7.Close the top cover. close top cover.eps Downloaded From ManualsPrinter.com Manuals
C7350/7550 User’s Guide: Troubleshooting • 522 Paper Jams Examples of Paper Jams Paper jams are frequent More than one sheet feeds at a time Paper curls Paper feeds at an angle Possible cause Remedy The printer is not horizontal.Place the printer on a stable, level surface. The paper is too thin.Use the correct type of paper. See Specifications. The paper is moist or affected by static.Store paper within specified temperature and humidity levels. The paper is creased or wrinkled.Remove the creased/wrinkled paper from the feed tray. The paper is not aligned correctly.Adjust tray or manual feed guides. Paper doesn’t feed.Correct paper feed selection in the printer driver. Downloaded From ManualsPrinter.com Manuals
C7350/7550 User’s Guide: Troubleshooting • 523 Paper Jams Printer does not print after jam is cleared Possible cause Remedy The top cover was closed before all paper jams were cleared.Removing a paper jam is not enough. The top cover cannot be closed until all of the paper jams are cleared. Gently open and close the top cover. Downloaded From ManualsPrinter.com Manuals
C7350/7550 User’s Guide: Troubleshooting • 524 Print Quality Problems Stripes: White The stripes appear in the same direction as the paper was printed (moved through the printer). Stripes: Black The stripes appear in the same direction as the paper was printed (moved through the printer). Possible causeRemedy LED head is dirty. Clean LED head with lens cleaner or soft tissue. See “Cleaning the LED heads” on page 502. Toner is low.Change toner cartridge. See “Changing the Toner Cartridge” on page 484. Image drum damaged.Change image drum. See “Changing the Image Drum” on page 491. Possible causeRemedy Image drum is damaged.Replace image drum. “Changing the Image Drum” on page 491. Toner is low.Change toner cartridge. See “Changing the Toner Cartridge” on page 484. Periodic black lateral l i n e s o r s p o t s . • If the lines or spots occur at intervals of approximately 44 - 94 mm, the image drum (green tube) is damaged or dirty. If damaged, replace the image drum cartridge. If dirty, wipe the image drum gently with soft tissue. If this does not work, replace the image drum. • If the lines or spots occur at intervals of approximately 113 mm, the fuser roller is damaged. Change the fuser unit. See “Changing the Fuser” on page 499. The image drum has been exposed to light.Remove the image drum from the printer and store it in a dark place for several hours. If this does not work, replace the image drum. Downloaded From ManualsPrinter.com Manuals
C7350/7550 User’s Guide: Troubleshooting • 525 Print Quality Problems Blurred letter edges Possible causeRemedy LED is dirty. Clean LED with lens cleaner or soft tissue. See “Cleaning the LED heads” on page 502. Cannot print desired color because toner is low.Replace toner cartridge. See “Changing the Toner Cartridge” on page 484. Black formation method does not match application.Open the printer driver and set black formation to CMYK. See “Printing Black” on page 31. Downloaded From ManualsPrinter.com Manuals
C7350/7550 User’s Guide: Troubleshooting • 526 Print Quality Problems Faded Output Streaks Faded Output Random Patches Faded Output Print Possible causeRemedy LED head is dirty. Clean LED head with lens cleaner or soft tissue. See “Cleaning the LED heads” on page 502. Toner is low.Change toner cartridge. See “Changing the Toner Cartridge” on page 484. Paper is unsuitable for printer.Use recommended paper. See Paper (Media)“Recommendations” on page 62. Possible causeRemedy The paper is moist. Store paper within specified temperature and humidity levels. See Paper (Media)“Recommendations” on page 62. Possible causeRemedy The toner cartridge is incorrectly installed.Reinstall the toner cartridge. See “Changing the Toner Cartridge” on page 484. Toner is low.Change toner cartridge. The paper is moist. Store paper within specified temperature and humidity levels. See Paper (Media)“Recommendations” on page 62. Paper is unsuitable for printer.Use recommended paper. See Paper (Media)“Recommendations” on page 62. Downloaded From ManualsPrinter.com Manuals
C7350/7550 User’s Guide: Troubleshooting • 527 Print Quality Problems Shading on unprinted sections Toner rubs off the output Output is garbled or incorrect Possible causeRemedy Paper has been affected by static electricity.Store paper within specified temperature and humidity levels. See Paper (Media)“Recommendations” on page 62. Paper is too thick.Use recommended paper. See Paper (Media)“Recommendations” on page 62. Toner is low. Change toner cartridge. See “Changing the Toner Cartridge” on page 484. Possible causeRemedy Media Weight and Media Type settings may not be appropriate.Set the value of media weight to the next heaviest one. See Paper (Media)“Weight and Type” on page 58 Packing materials were left on the fuser when it was installed.Careful! Fuser may be HOT! Open the top cover and check to be sure that all the packing materials were removed from the fuser. To remove the fuser, see “Changing the Fuser” on page 499. Possible cause Remedy Possible mismatch on parallel connection between computer and printer.Change parallel transmission mode. See “Parallel Interface Problems” on page 528. Downloaded From ManualsPrinter.com Manuals
C7350/7550 User’s Guide: Troubleshooting • 528 Parallel Interface Problems Parallel Transmisssion Mode The parallel port supports IEEE-1284 and ECP mode. If your computers parallel port is not compatible with one of these modes, the printer may not print at all or it may print corrupted data. To correct for this, enter the printers Parallel Menu and change the ECP setting to Disable. control panel - language setup.eps 1.Press MENU until PARALLEL MENU displays 1.Press SELECT. 2.Press ITEM (either + or -) until ECP displays. 3.Press VALUE (either + or -) until DISABLE displays. 4.Press SELECT. An asterisk (*) appears to the right of the selected setting. 5.Press ONLINE. The printer goes online. ONLINE displays. OnlineMenu Item ValueSelect Ready Attention OnlineMenu Item ValueSelect Ready Attention Cancel Downloaded From ManualsPrinter.com Manuals
C7350/7550 User’s Guide: Troubleshooting • 529 Parallel Interface Problems Cannot configure for parallel connection Windows only Possible cause Remedy The computer does not support bi-directional parallel interface. There is no solution for this problem. You must use a computer that supports a bi-directional parallel interface. Parallel cable does not meet specifications.Use a bi-directional parallel cable that meets the IEEE 1284–1994 specifications. The interface is disabled.Check that the parallel interface is set to enable. Configuration procedure was not correctly followed or cancelled.Configure again from the beginning. Parallel cable is disconnected or faulty.Reconnect or try another cable. A converter, buffer or extension cable is being used.Test by connecting printer and computer directly. Downloaded From ManualsPrinter.com Manuals
C7350/7550 User’s Guide: Troubleshooting • 530 Parallel Interface Problems Output is garbled or incorrect. Windows only Possible cause Remedy Possible mismatch on parallel connection between computer and printer.Change parallel transmission mode (see Parallel Transmission Mode above). Downloaded From ManualsPrinter.com Manuals