Brother MFC 7550MC - Manual (Page 215)

TROUBLESHOOTING PROCEDURES
16-10
MFC 4550/6550MC/7550MC
OP-US-5.0
Maintenance
[386Enh]
;device=wpscomd.386
;device=wpsljvpd.386
:
:
;WPSLPT1=1
You must restart Windows to make these modification effective.
The modification disables the printer status reporting on your PC, however, you will
be able to use MFC 6550MC/7550MC series with no further problems.
Graphics or text is missing when the document is printed
This could be caused by your Display Driver software. Contact your reseller and
inquire about the latest Display Driver software. Another solution is to change your
Windows Setup Display selection from the current selection to the standard VGA or
SVGA selection; contact your reseller or Microsoft Support if you need help modifying
your Windows Display selection or installing new Display Driver software.