Toshiba e-STUDIO556 Service Manual page 994

Test print mode (test mode 04)
Code Types of test pattern
114 Secondary scanning direction 17 gradation
steps
142 Grid pattern
e-STUIDIO556/656/756/856
Remarks
Error diffusion / gamma adjustment
pattern
Pattern width: 2 dots, Pitch: 10 mm
Output for
SLG
LGC