Test Pattern 1 (Maintenance Mode 09); Test Pattern - Brother MFC8420 Service Manual

CHAPTER 7 MAINTENANCE MODE
3.5

Test Pattern 1 (Maintenance mode 09)

< Function >
This function, much like the copying function, prints out test pattern 1 to allow the service
personnel to check for record data missing or print quality.
< Operating Procedure >
Press the 0 and 9 keys in this order in the initial stage of the maintenance mode.
The figure below shows test pattern 1.
Fig.7-4
7-8