Brother DCP130C Service Manual page 292

Selectors 3 and 4: Protection of platen from no-paper printing to prevent stains (Functional
restriction on the paper width sensor)
The setting made by these selectors applies to such printing that is assumed to be at a high
resolution, that is, printing from a PC or media card, copying, and printing via PictBridge.
If these selectors are set to "0, 0," the machine automatically determines the functions of the paper
width sensor depending upon the print resolution selected. Therefore, in low resolution printing, e.g.
when the "Fast" print quality is selected, the paper width sensor is automatically disabled. On the
contrary, in high resolution printing, e.g. when the "Highest" print quality is selected, the sensor is
automatically enabled.
Setting these selectors to "1, 1" disables the paper width sensor to save the sensing time for higher
throughput.
Selectors 5 and 6: Assurance print 1 and 2
Enabling assurance print 1 or 2 causes the machine to mix black ink (pigment-based) and a little of
cyan ink (dye-based) to use in monochrome copy or in list output, respectively.
If black ink is not jetted out normally, cyan ink can be substituted for black ink in printing. This
ensures that in list printing (in which data once printed will be deleted) the data will be preserved as
a printout.
Selectors 7 and 8: Workaround for false jam detection (Functional restriction on the paper width
sensor)
The setting made by these selectors applies to the list and index printing and test printing.
When logo printed recording paper is used, for example, the paper width sensor might misdetect
the paper present state as "no paper loaded" due to the logo's color. Limiting the paper width sensor
functions with these selectors avoids detecting such a false paper jam.
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