Developing Bias Voltage Correction (Function Code) - Brother MFC-9130CW Service Manual
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1.4.34 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
density sensor (Function Code 72)" in this chapter
performing this maintenance mode 83 after replacing the main PCB ASSY, make sure to
perform the
<Operating procedure>
(1) Press the 8 and 3 keys in this order in the initial state of the maintenance mode.
The machine displays "PLS WAIT 83" on the LCD and starts the developing bias voltage
correction.
(2) Upon completion of the developing bias voltage correction, the machine returns to the
initial state of the maintenance mode.
If developing bias voltage correction fails, "ERROR 83" is displayed on the LCD.
Display the error message by pressing the
corresponds to the error message.
Error message
FAILED DEVBIAS
TONER EMPTY #
Cover is Open
Replace Toner
* # indicates the toner color (Y, M, or C) of which cartridge became empty.
"1.4.27 Sensitivity adjustment of density sensor (Function Code 72)"
Remove the error factors with the following operations and
press the Mono Start key 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 L/R PCB ASSY.
*
Replace the empty toner cartridge and press the Mono Start
key to clear the error. After the sensitivity adjustment of the
density sensor
developing bias voltage value is compensated again.
Close the joint cover ASSY.
Replace the black toner cartridge and press the Mono Start
key to clear the error. After the sensitivity adjustment of the
density sensor
developing bias voltage value is compensated again.
"1.4.27 Sensitivity adjustment of
has been done more than once. When
key, and take the following measure that
Measure
(Function code
(Function code
5-66
first.
72) is performed, the
72) is performed, the
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