Brother MFC-J3520 Service Manual page 336

- 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
monochrome FAX reception and 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
The setting made by these selectors applies to the FAX, list, 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.
(Functional restriction on the paper width sensor)
5-65
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