Brother HL-6050 Service Manual page 278

CHAPTER 7 SERVICE SUPPORT SOFTWARE
Title
MAINTENANCE
PRINT
Subtitle
7-12
Description
Prints the maintenance information.
(The contents are the same as the second
page of Print Settings.)
<Developing Bias: xxx V> is added to an end.
xxx:
The counter of the developer unit is 0 = 500V
The counter of the developer unit is 7500 =
400V
The counter of the developer unit is more
than 7500 = 400V
*There is a bug if the value is other than 400V
to 500V.