Developing Bias Voltage Correction (Function Code 83) - Brother DCP-9010CN Service Manual

1.4.29 Developing bias voltage correction (Function code 83)

<Function>
This function performs developing bias voltage correction to fix the density of each color toner
when printed color is not correct.
Note:
Before this function is performed, there is a need that the
sensor (maintenance mode 72)
maintenance mode 83 after replacing the main PCB, make sure to perform the
adjustment of density sensor (maintenance mode 72)
<Operating procedure>
(1) Press the 8 and 3 buttons in this order in the initial state of the maintenance mode.
The machine displays "PLEASE WAIT" on the LCD.
(2) When the developing bias voltage correction is finished, the machine beeps for one
second and returns to the initial state of the maintenance mode.
When any of the following error messages is displayed, take a relevant measure given in
the table below.
Error message
FAILED
TONER EMPTY # *
Cover is Open
Replace Toner
No Paper
Jam Tray1
Jam Rear
* # indicates the toner color (Y, M, or C) of which cartridge became empty.
Note:
Any panel operation is invalid during the developing bias voltage correction.
has been done more than once. When performing this
Remove the error factors with the following operations and
press the Start/Black button to clear the error.
- Re-insert the toner cartridge in the correct position.
- Replace the toner cartridge.
- Replace the drum unit.
- Replace the belt unit.
- Replace the registration sensor holder ASSY.
Replace the empty toner cartridge and press the OK button
to clear the error. Perform the developing bias voltage
correction again.
Close the top cover.
Replace the toner cartridge.
Replenish paper, and press the Start/Black button to clear
the error.
Remove the jammed paper, and press the Start/Black
button to clear the error.
Remove the jammed paper, and press the Start/Black
button to clear the error.
7-54
Sensitivity adjustment of density
first.
Measure
Sensitivity
Confidential