Adjustment Work Procedures - Brother HL-3450CN Service Manual

CHAPTER 5 CONTROL PANEL OPERATION
3.4

Adjustment Work Procedures

3.4.1 Adjustment of top and left margin
The top and left margins can be adjusted by button operation on the control panel.
<Purpose>
If there is no top margin or left margin set for the print guarantee area or when the MCTL
PWB is replaced, the adjustment of top and left margin will be required.
<Adjustment Method>
[Leading edge] (A + B) / 2
[Left edge] (C + D) / 2
Execute "43 MARGIN ADJUST" in the FACTORY MODE.
(1) Execute "GRID PRINT" in Service Mode.
(2) Measure the position 'A' and 'B' of top margin.
d
Default Value 4.0
(3) Measure the position 'C' and 'D' of left margin.
d
Default Value 3.0
(4) If the specification value is not met, implement the adjustment.
(5) After adjustment execute "GRID PRINT" and confirm the margins.
Left margin
C
D
r
1.5mm
r
1.5mm
Leading dedge
Print
Guarantee
Area
Fig. 5-2
5-44