Brother HL-4570CDW - Developing Bias Voltage Correction (Function Code 83)

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Confidential
1.4.25 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.
<Operating procedure>
(1) Press the or button to display “MAINTENANCE 83” on the LCD in the initial state of
the maintenance mode. Then, press the OK button. The printer displays “PLEASE
WAIT” on the LCD and starts the developing bias voltage correction.
(2) Upon completion of the developing bias voltage correction, the printer returns to the initial
state of the maintenance mode.
When an error message is displayed on the LCD, take the measures described in the
table below.
* # indicates the toner color (Y, M, or C) of which cartridge became empty.
Note:
Before this function is performed, there is a need that the “Sensitivity adjustment of density
sensor (Function mode 72)” has been done more than once. When performing this
maintenance mode 83 after replacing the main PCB, make sure to perform the “Sensitivity
adjustment of density sensor (Function mode 72)” first.
Error message Measure
FAILED Remove the error factors with the following operations and
press the Go button to clear the error.
- Re-insert the toner cartridge in the correct position.
- Replace the toner cartridge.
- Replace the drum unit.
- Replace the waste toner box.
- Replace the belt unit.
- Replace the registration mark sensor holder ASSY.
TONER EMPTY # * Replace the empty toner cartridge and press the Go button
to clear the error. After the sensitivity adjustment of the
density sensor (Function code 72) is performed, the
developing bias voltage value is compensated again.
Cover is Open Close the front cover.
Replace Toner Replace the black toner cartridge and press the Go button to
clear the error. After the sensitivity adjustment of the
density sensor (Function code 72) is performed, the
developing bias voltage value is compensated again.
Note:
Any panel operation is invalid during the developing bias voltage correction.