Developing Bias Voltage Correction (Function Code 83) - Brother HLL3290CDW Service Manual

1.3.34 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 function code 83 after replacing the main PCB, make sure to perform the
"1.3.26 Sensitivity adjustment of density sensor (Function code 72)" in this chapter
< Operating Procedure >
(1) For models with touch panel
Press the [8] and [3] 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.
For models without touch panel
Press the [▲] or [▼] in the initial state of maintenance mode to display
"MAINTENANCE 83" on the LCD, and press the [OK]. The machine displays "PLS
WAIT 83" on the LCD and starts the developing bias voltage correction.
(2) When developing bias voltage correction is completed, "MODE KYMC ****" is displayed
on the LCD. When you press the [Start] or [Mono Start], the machine returns to the initial
state of the maintenance mode. (* represents any number from 0 to 3.)
Note:
If developing bias voltage correction fails, "ERROR 83" is displayed on the LCD. Display the
error message by pressing the [▼], and take the following remedy that corresponds to the
error message.
Error display
FAILED DEVBIAS
TONER EMPTY #
Cover is Open
Replace Toner
* # indicates the toner color (Y, M, or C) of which cartridge became empty.
Remove the error cause with the following operations and press
the [Start] or [Mono Start] 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 ASSY.
*
Replace the empty toner cartridge and press the [Start] or [Mono
Start] to clear the error. After the sensitivity adjustment of the
density sensor (Function code
bias voltage value is compensated again.
Close the top cover.
Replace the black toner cartridge and press the [Start] or [Mono
Start] to clear the error. After the sensitivity adjustment of the
density sensor (Function code
bias voltage value is compensated again.
5-79
"1.3.26 Sensitivity adjustment of
has been done more than once. When
Remedy
72) is performed, the developing
72) is performed, the developing
first.
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