Brother HL-7050 Service Manual page 236

CHAPTER 6 TROUBLESHOOTING
S-2 Unable to print from application software with the serial interface.
User Check
Check that the serial interface settings are correctly set up with the panel switches.
Possible cause
Failure inside
the printer
Main PCB
failure
S-3 Unable to print from application software under DOS.
User Check
(1) Check that the DOS application software interface settings match that of your printer.
(2) Check if the printer has any printer alarms active.
(3) Check if the appropriate printer is selected in your application software.
(4) If the serial interface is used, check that the interface settings are correctly set up with the proper
panel switches. Check that the serial parameters of baud rate, parity and stop bits match
between your application software and the printer.
Possible cause
Failure inside
the printer
Main PCB
failure
Step Check
1 Is it possible to print the test
page with the method of
subsection 5.5 'Control Panel
Setting Menu' in CHAPTER
2 Is it possible to print with
another PC and printer cable?
Step Check
1 Is it possible to print the test
page with the method of
subsection 5.5 'Control Panel
Setting Menu' in CHAPTER
2 Is it possible to print with
another PC and printer cable?
Result
No Identify the error type, then
refer to the specified section of
this chapter.
2?
No Replace the main PCB.
Result
No Identify the error type, then
refer to the specified section of
this chapter.
2?
No Replace the main PCB.
Yes This problem may appear
under the specified system
environment. Check the
environment which the user
used.
6-26
Remedy
Remedy