Brother DCP-L8400CDN Service Manual page 439

1.3.29 Continuous adjustments of density and registration sensor
(Function code 73)
<Function>
This function is used to perform the following functions consecutively:
Sensitivity adjustment of density sensor (Function code 72), Developing bias voltage
correction (Function code 83), and Adjustment of color registration (Adjustment of inter-color
position alignment) including registration sensor calibration (Function code 66).
<Operating procedure>
(1) Press the 7 and 3 keys in this order in the initial state of the maintenance mode.
"72/83/66-1" is displayed on the LCD.
(2) Press the SET key. "PLS WAIT 72" is displayed on the LCD and each adjustment is
performed in the following order.
1) Sensitivity adjustment of density sensor (Function code 72)
LCD: PLS WAIT 72
2) Developing bias voltage correction (Function code 83)
LCD: PLS WAIT 83
3) Adjustment of color registration (Adjustment of inter-color position alignment)
including registration sensor calibration (Function code 66)
LCD: PLS WAIT 66-1
(3) When all operations are completed, "COMP" is displayed on the LCD.
Pressing the
the maintenance mode.
Note:
If each adjustment fails, "ERROR**" is displayed on the LCD and the adjustment is stopped.
If you press the
"ERROR **" displayed on the LCD indicates corresponding function code number. Make
sure to take an appropriate measure after checking the measures provided in each function
code.
key and X key in this order and the machine returns to the initial state of
key with "ERROR**" displayed, the details of the error are shown. "**" in
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