OKI C7350DTN User Manual

C7350/7550 User’s Guide: Troubleshooting   •  531
USB Problems
Cannot configure for USB connection
  
 
NOTE
• Windows 95 and NT 4.0 do not support USB.
• Windows 98 upgraded from Windows 95 may not 
support USB.
• Windows 98 original installation and Windows Me, 
2000, and XP all support USB.
Possible cause Remedy
Computer does not 
support USB 
interface.Check if there is a USB controller in the Windows 
device manager.
USB cable does not 
meet 
specifications.Use USB cable to specification Ver.1.1....

C7350/7550 User’s Guide: Troubleshooting   •  532
USB Problems
Cannot print
•LPT WRITE ERROR is displayed (Windows only).    
•
PRNUSBX WRITE ERROR is displayed.
 
Possible causeRemedy
Interface is disabled.
(Windows only)In the printer menu settings, enable Parallel or 
USB interface.
See “Parallel Menu” on page 100 or
“Parallel Menu” on page 100
(Windows only)
Printer is switched 
OFF.Switch ON.
Printer interface cable 
is disconnected.Reconnect the printer interface cable.
A converter, buffer,...

C7350/7550 User’s Guide: Troubleshooting   •  533
Application Error
or
General Protection Fault
 
Possible causeRemedy
Application is not 
suitable for Windows 
version.
(Windows only)Upgrade the application.
(Windows only)
Memory is 
insufficient for 
number of 
applications running.Close all other applications.
Print file is 
corrupted.Correct or recreate the file.
Memory is 
insufficient for 
application.Increase computer’s memory.
See “Memory (Additional)” on page 539
Insufficient free 
space on hard...

C7350/7550 User’s Guide: Troubleshooting   •  534
Paper Size Change request
  
Possible causeRemedy
Paper loaded in tray 
is different size from 
that formatted in 
software 
application.Either change paper in tray to match size 
formatted in application and press ONLINE to 
continue,
or 
Continue printing on existing paper by pressing 
ONLINE.
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C7350/7550 User’s Guide: Troubleshooting   •  535
Printer does not go online
 
Printer makes a strange noise
  
Possible causeRemedy
Bad connection Turn off the printer.  Disconnect the power 
cable. Reconnect power cable.  Turn on the 
printer. 
If this does not clear the fault, call for service.
Possible causeRemedy
The printer is not 
horizontal.Place the printer on a stable, level surface.
There are scraps of 
paper or other foreign 
matter inside the 
printer.Check the inside of the printer and...

C7350/7550 User’s Guide: Troubleshooting   •  536
Printer takes a long time to start printing
     
Possible causeRemedy
The printer has to warm 
up returning from 
power save mode.In the printer menu settings, set power save 
to a higher value to increase the length of time 
before entering power save mode.
See “POWER SAVE Mode” on page 45.
The printer is cleaning 
the image drum.  This 
helps ensure good print 
quality.  The cleaning 
p r o c e s s  t a k e s  t i m e .           Wait until this...

C7350/7550 User’s Guide: Troubleshooting   •  537
Printing is slow
 
Printing does not start
 
Printing cancels
    
Possible causeRemedy
Print processing is 
carried out by the 
computer.Use a computer with a faster processor.
Print resolution is 
set high.Set lower print resolution in the printer driver.
Data is too complex. Simplify data.
Possible causeRemedy
Printer error Check the control panel. If an error message is 
displayed, correct the problem.
Possible causeRemedy
The printer interface 
cable...

C7350/7550 User’s Guide: Accessories   •  538
Accessories
Depending on the configuration of your printer, you may wish to 
add one or more of the following options as your needs evolve:
•Memory  (see page 539)
•Hard Disk Drive  (see page 545)
•Duplex Unit  (see page 549)
•Paper Trays  (see page 550)
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C7350/7550 User’s Guide: Accessories   •  539
Memory (Additional)
When to Install
Adding memory increases the printer’s capacity to process complex 
data.  You should add memory if:
•you use duplex printing  
•error messages appear when printing complex data.  
•you run graphic-intensive applications on Networks.  
Available Amounts
Additional Memory is available in modules of:  
•64Mb
•128Mb
•256Mb
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C7350/7550 User’s Guide: Accessories   •  540
Memory
How to Install
1.Turn off the printer.
2.Disconnect the power cable and printer interface cable.
3.Loosen the two screws (1) and remove the main board.
 mother board remove.eps 
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