Brother MFC-8370DN Service Manual

3-74
Confidential
■ Speed dialing and One-touch dialing can't be used.
■ Can not receive FAX.
Step Possible cause Check Result Remedy
1
Dialing mode
Setting
Does a dialing signal
(PB or DP) come out
normally in each mode?
(Use telephone line
emulator.)
Yes
Check the dialing mode
setting at customer's
again.
Check the telephone line
cord between machine and
socket.
2
Connection
between main
PCB and NCU
PCB
Are the main PCB and
NCU PCB connected
properly?
No
Reconnect the connector
properly.
3
Connection
between main
PCB and control
panel PCB
Are the main PCB and
control panel PCB
connected properly?
No
Reconnect the connector
properly.
4
Contact of rubber
key
Is the problem solved
after replacing the
rubber key?
Yes
Replace the rubber Key.
5
NCU PCB Is the problem solved
after replacing the NCU
PCB ASSY?
Yes
Replace the NCU PCB
ASSY.
6
Control panel
PCB
Is the problem solved
after replacing the
control panel PCB?
Yes
Replace the control panel
PCB.
7
Speed dialing
keys or one-
touch dialing
keys
Can a fax transmission
be made using the
numeric keys?
Yes
Replace the main PCB
ASSY.
<User Check>
- Verify that the telephone cord is securely inserted into the right socket.
Step Possible cause Check
Result Remedy
1
Receive mode
setting
Is the receive mode set
to automatic receive
mode?
No
Set the receive mode to
automatic receive mode.
2
NCU PCB Is the problem solved
after replacing the NCU
PCB ASSY?
Yes
Replace the NCU PCB
ASSY.
3
Main PCB Is the problem solved
after replacing the main
PCB ASSY?
Yes
Replace the main 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