Brother MFC-9340CDW Service Manual

5-66
Confidential
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.
<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 key, and take the following measure that
corresponds to the error message.
* # 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 "1.4.27 Sensitivity adjustment of
density sensor (Function Code 72)" in this chapter has been done more than once. When
performing this maintenance mode 83 after replacing the main PCB ASSY, make sure to
perform the "1.4.27 Sensitivity adjustment of density sensor (Function Code 72)" first.
Error message Measure
FAILED DEVBIAS 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.
TONER EMPTY #
*
Replace the empty toner cartridge and press the Mono Start
key 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 joint cover ASSY.
Replace Toner Replace the black toner cartridge and press the Mono Start
key 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.

Brother MFC-9340CDW Specifications

Printing Specifications

print speed (black)	up to 23 ppm
print speed (color)	up to 23 ppm
print resolution	up to 600 x 2400 dpi
automatic duplex printing	Yes

Copying Specifications

copy speed (black)	up to 23 cpm
copy speed (color)	up to 23 cpm
copy resolution	600 x 600 dpi
copy reduction/enlargement	25% - 400% in 1% increments

Scanning Specifications

scanner type	Color Flatbed with ADF
document glass size	8.5” x 11.7”
scan resolution (optical)	1200 x 2400 dpi
scan resolution (interpolated)	19200 x 19200 dpi

Fax Specifications

fax modem	33.6k bps
fax page memory	up to 500 pages
speed dial locations	200

Memory and Interfaces

memory (standard/max)	192MB / 192MB
standard interfaces	Wireless 802.11b/g/n, Ethernet, Hi-Speed USB 2.0
usb direct interface	Yes

Supplies and Accessories

black toner cartridge yield	2, 500 pages
cyan toner cartridge yield (standard)	1, 400 pages
magenta toner cartridge yield (standard)	1, 400 pages
yellow toner cartridge yield (standard)	1, 400 pages
cyan toner cartridge yield (high capacity)	2, 200 pages
magenta toner cartridge yield (high capacity)	2, 200 pages
yellow toner cartridge yield (high capacity)	2, 200 pages
drum unit yield	15, 000 pages
belt unit yield	50, 000 pages
waste toner box yield	50, 000 pages
multi-purpose paper	Letter, 500 sheets