Brother MFC-8370DN Service Manual

7-47
Confidential
■ Resetting the Life Counter of the Laser Unit
<Function>
This function allows you to reset the page counter of the laser unit and increase the number
of replacement times by one.
<Operating Procedure>
(1) Press the [3] and [9] keys at the same time in the ready state.
The “Reset Menu” will appear on the LCD.
(2) Press the [ ] button a few times to select “Laser”.
(3) Press the [OK] button.
The “1. Reset / 2. Exit” will appear on the LCD.
(4) Press the [1] key when resetting the life counter of the laser unit. Press the [2] key if not
resetting.
(5) The “Accepted” will appear on the LCD if pressing the [1] key. The page counter of the
laser unit is reset, and the number of replacement times is increased by one. Then, the
machine returns to the ready state. If pressing the [2] key, the machine do not reset the
page counter and the “Laser” will appear on the LCD.
5.2 Develop Roller / Developing Bias Voltage Counter Reset Function
Since print density is likely to become darker as the toner gets older, the developing bias is
lowered by degrees (bias voltage is reduced) according to the number of develop roller
rotations so that an almost fixed density can be maintained from the beginning to the end. The
developing bias voltage can be verified in the display of log information (Function code 80).
In the case that the toner cartridge is replaced with a new one, the develop roller counter and
developing bias voltage are reset at the same time. This function allows you to reset these
manually.
<Operating Procedure>
(1) Press the [Clear/Back] button while the front cover is being opened.
(2) The “Replace Drum ?” “1. Yes 2. No” will appear on the LCD. If resetting the counter,
press the [1] key. If not, press the [2] key.
(3) Press the [*], [0] and [0] key in this order, the counter will reset and "Accepted" will
appear on the LCD.
(4) The machine returns to the status that the front cover is opened.
Panel Operation Function
Pressing the [Clear/Back] button
while the front cover is being
opened.
Menus of the develop roller counter reset
Note:
• If there is no operation for 60 seconds or more, the machine automatically
deactives the develop roller / developing bias voltage counter reset function. The
“Cover is Open Close the Front Cover” will appear on the LCD. Then, the machine
returns to the ready state.

Brother MFC-8370DN Specifications

General

Duplex printing	Yes
Print technology	Laser
Maximum resolution	1200 x 1200 DPI
Time to first page (black, normal)	8.5 s
Print speed (black, normal quality, A4/US Letter)	28 ppm
Input color depth	48 bit
Optical scanning resolution	600 x 2400 DPI
Copier resize	25 - 400 %
Maximum copy resolution	1200 x 600 DPI
Maximum number of copies	99 copies
N-in-1 copy function (N=)	2, 4, 9, 16, 25
Copy speed (black, normal quality, A4)	28 cpm
Faxing	Mono faxing
Fax memory	500 pages
Modem speed	33.6 Kbit/s
Total input capacity	250 sheets
Total output capacity	150 sheets
Multi-Purpose tray input capacity	50 sheets
Auto document feeder (ADF) input capacity	20 sheets
Display	LCD
Product color	Grey, White
Market positioning	Home & office
Display number of lines	2 lines
Display number of characters	16
Card reader integrated	-
Sound power level (standby)	30 dB
Sound pressure level (printing)	56 dB
Paper tray media types	Bond paper, Envelopes, Labels, Plain paper, Recycled paper, Transparencies
Non-ISO print media sizes	Executive
ISO A-series sizes (A0...A9)	A4, A5, A6
ISO B-series sizes (B0...B9)	B5
Maximum ISO A-series paper size	A4
Multi-Purpose Tray media weight	60 - 163 g/m²
Standard interfaces	Ethernet, USB 2.0
USB 2.0 ports quantity	1
Dimensions (WxDxH)	531 x 451 x 475 mm
All-in-one functions	Copy, Fax, Scan
Color all-in-one functions	Scan
Power consumption (standby)	85 W
Power consumption (average operating)	680 W
Package weight	21100 g
Digital sender	No
Maximum duty cycle	- pages per month

Weight and Dimensions

Depth	443 mm
Width	390 mm
Height	442 mm