Incorrect Printout - Brother HL 1240 - B/W Laser Printer Service Manual

CHAPTER 6 TROUBLESHOOTING
8.

INCORRECT PRINTOUT

When the data is not printed correctly as it is seen on the PC screen, follow the procedures
below in the event of a specific error.
P-1 The printer prints unexpectedly or it prints garbage.
User Check
(1) Check if the printer cable is not too long. It is recommended to use a parallel cable of less than 2
meters (6.6 feet) in length.
(2) Check that the printer cable is not damaged or broken. Check also that the printer cable is
connected to the correct interface connectors of both the printer and PC.
(3) If an interface switching device is used, remove it and connect the computer directly to the printer
and try again.
(4) Check that the appropriate printer driver is selected as 'Set as Default'. Check also that the
correct print port is set for the selected printer driver.
(5) Check that the printer is not connected to the same port which is also connected to a mass
storage device or scanner. Remove all other devices and connect the port to the printer only.
Turn off the printer status monitor in the device options tab in the printer driver.
(6) If the print port is set as an ECP port, change it to a normal port.
(7) Try printing the test page referring to
(8) Try resetting the factory settings.
Possible cause
Failure inside
the printer
Main PCB
failure
RS-100M**
failure
**NOTE:
Take Step 2 when using the RS-100M or take Step 3 only when this problem appears while
using the RS-100M.
NOTE:
If the printer prints garbage or incorrect fonts, instruct the user to use the 'Troubleshooting for
Printer won't print' tool of the self-diagnostics tools. If the problem cannot solved, instruct user
to use the 'Diagnostics' tool described in the Appendix so that you can get a log file to
investigate the cause of the problem. For details on the self-diagnostics tools, see
5 'HOW TO USE SELF-DIAGNOSTICS
Subsection 9.1 'Test Print Mode'
Step Check
1 Is it possible to print the test
page with the method of
Subsection 9.1 'Test Print
Mode' in this chapter?
2 Is it possible to print with
another PC, printer cable and
RS-100M**?
3 Is it possible to print with
another PC and cable?
Result
No
No
No
Yes
TOOLS'.
6-42
in this chapter.
Remedy
Identify the error type, then
refer to the specified section of
this chapter.
Replace the main PCB.
Replace the RS-100M.
This problem may appear
under the specified system
environment. Check the
environment which the user
used.
APPENDIX