Brother HL-4200CN Service Manual page 206

10. IMAGE QUALITY SPECIFICATIONS ......................................................V-73
10.1 Parallelism.....................................................................................................................V-73
10.2 Diagonal ........................................................................................................................V-73
10.3 Skew .............................................................................................................................V-73
10.4 Straightness ..................................................................................................................V-74
10.5 Magnification Error ........................................................................................................V-74
10.6 Registration ...................................................................................................................V-74
10.7 Guaranteed Printing Area .............................................................................................V-75
11. TEST PRINT ............................................................................................V-76
11.1 Test print .......................................................................................................................V-76
12. IMAGE QUALITY FIP...............................................................................V-77
12.1 Notes on Image Quality Trouble Check........................................................................V-77
12.2 Basic Rule of Image Quality Adjustment ......................................................................V-77
12.3 Troubleshooting Table by Trouble Phenomena ...........................................................V-78