Test Pattern (Function Code 09) - Brother MFC990CW Service Manual

9.1.4.4 Test Pattern (Function code 09)

Function
This function prints out a test pattern (Print Quality Check sheet) to allow the service personnel
to check the print quality.
Before starting the operation below, be sure to set A4-size paper in the paper tray for printing
check patterns.
Operating Procedure
Press the 0 and 9 keys in this order in the initial stage of the maintenance mode. For models
without numerical keypad, enter 0 and 9 in this order using the , and OK keys.
The figure on the next page shows a test pattern which is printed on the Print Quality Check
sheet. According to the instructions printed on the sheet, you can check or correct the print
quality.
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