Brother MFC-9330CDW Service Manual

5-52
Confidential
1.4.27 Sensitivity adjustment of density sensor (Function code 72)
<Function>
This function allows you to print the patch data for density sensor sensitivity adjustment on the
belt unit and measure the density with the density sensor. The characteristics of the density
sensor are calculated based on the value measured by the density sensor, and the parameter
for correcting developing bias voltage is adjusted.
<Operating procedure>
(1) Press the 7 and 2 keys in this order in the initial state of the maintenance mode.
"PLS WAIT 72" is displayed on the LCD.
(2) When the parameter is obtained without errors, the machine returns to the initial state of
the maintenance mode. If the sensitivity adjustment of the density sensor fails, "ERROR
72" 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.
LCD Description
dens_l_drk_err - Check the harness connection of the eject sensor PCB and
reconnect it.
- Replace the registration mark L PCB ASSY.
- Replace the main PCB ASSY.
belt_err - Replace the belt unit.
- Replace the waste toner box.
- Replace the registration mark L PCB ASSY.
- Replace the main PCB ASSY.
dens_pat_err
dens_calc_err
- Check if the toner cartridges and drum units are set in the
correct order of colors.
- Replace the toner cartridges and drum units.
- Replace the registration mark L PCB ASSY.
- Replace the main PCB ASSY.
dens_led_adj_err - Replace the belt unit.
- Replace the waste toner box.
- Replace the registration mark L PCB ASSY.
- Replace the main PCB ASSY.
lph_calc_err - Replace the toner cartridges and drum units.
- Securely close the joint cover ASSY.
- Clean the LED ASSY.
- Check the attachment of the LED ASSY, and reattach it.
TONER EMPTY #
*
Replace the empty toner cartridge and press the Mono Start
key to clear the error. Perform the sensitivity adjustment of
the density sensor 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. Perform the sensitivity adjustment of
the density sensor again.

Brother MFC-9330CDW Specifications

Print Specifications

print speed black	up to 23 ppm
print speed color	up to 23 ppm
print resolution	up to 600 x 2400 dpi

Copy Specifications

copy speed black	up to 23 cpm
copy speed color	up to 23 cpm
copy resolution	600 x 600 dpi

Scan Specifications

scan resolution optical	1200 x 2400 dpi
scan resolution interpolated	19200 x 19200 dpi
document glass size	8.5” x 11.7”

Fax Specifications

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

Paper Handling

auto document feeder capacity	up to 35 pages
paper size maximum	up to 8.5” x 14” (legal)
standard paper capacity	250 sheets

Power and Energy

deep sleep mode power consumption	<2W
automatic duplex printing	Yes
energy star qualified	Yes