1 ] Margin Adjust (Code 43) - Brother MFC-9420CN Service Manual

[ 1 ] Margin Adjust (Code 43)

Function
This function is to check and adjust the top margin and left margin.
The adjustment range is from –4.9mm max to +4.9mm max.
Always implement the operation when replacing the engine control board.
Operating Procedure
(1) Select Margin Adjust with using the 4 or 5 key in the initial stage of the factory mode.
After selecting, press the 6 key.
The "43 MARGIN ADJUST / ► TOP / LEFT / LEFT1" appears on the LCD.
(2) Select the top margin (TOP) or left margin (LEFT or LEFT1) with using the 4 or 5 key.
After selecting, press the 6 key.
LEFT: For adjusting the left margin on the paper in the upper tray
LEFT1: For adjusting the left margin on the paper in the lower tray
<Example of LCD indication>
"43 TOP +2.5mm / - 1 0 1 2 3 4
The margin can be adjusted up to 4.9mm max. in the right and left sides from the
standard value "0" by 0.7mm pitch.
Select the value according as the adjusted amount with using the 4 or 5 key. The
selected amount is displayed at the upper right side.
Press the 6 key to set the adjustment value.
(3) Press the 3 key so that the display is returned to the message described in Step (1).
(4) Press the 3 key again, and the machine returns to the initial stage of the factory mode.
<How to measure>
1) Implement "GRID PRINT" in the service mode.
2) Measure A and B of the top margin.
(Leading Edge) (A+B) / 2
3) Measure C and D of the left margin.
(Left Margin) (C+D) / 2
Left Margin
6 7 +"
Default Value 4.2±1.5mm
Default Value 4.2±1.5mm
C
Print
Guarantee
Area
D
Fig. 8-14
8 -3 9
Paper Feeding
Direction
Confidential