Brother MFC-8370DN Service Manual

2-25
Confidential
3.4.3 New toner detection
This machine is equipped with the function to detect that the residual quantities of the toner
are not enough by examining the degree that the toner in the cartridge blocks the light by the
transmission light sensor. This function informs the user's that the toner cartridge has reached
its life. However there is a description such as previous contents when the toner cartridge
reaches itself the life end by the abrasion of the rollers, "the toner is life end" is displayed on
the LCD and stops moving itself to promote the replacement of the new one even if the
remaining amount of the toner is enough. At this time, the toner LED sensor cannot check the
attachment of a new toner. There is a possibility that the image quality decrease and the toner
leakage occur if the cartridge that reaches longevity is continuously used. Therefore it is
necessary to remove the movement stop state when a new toner is attached to the machine.
It is new toner detection mechanism to explain here to enable this distinction.
The new toner detection can distinguish the standard toner and high yield toner cartridge.
The new toner detection is performed by the following procedure.
(1) The main motor will drive gear (4) through the interconnection of other gears.
(2) When gear (4) is rotated, rib A on that gear will push against the new toner actuator; the
new toner sensor will detect the actuator motion, and the machine detects that a new
toner cartridge has been installed.
(3) The standard toner cartridge has Rib A and Rib B on gear (4).
When the toner actuator is pushed twice, the two signals that are generated by the new
toner sensor, tell the machine that a standard toner cartridge has been installed.
(4) The high yield toner cartridge only has Rib A on gear (4).
When the toner actuator is pushed once, the signal that is generated by the new toner
sensor, tell the machine that a high yield toner cartridge has been installed.
<Machine side view when a new toner cartridge is installed>
Fig. 2-27
Gear (4)
Gear (3)
Rib B
Rib A
Gear (1)
Gear (2)
New toner actuator
New toner sensor
Toner cartridge
Relay front PCB ASSY

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