Brother MFC-8370DN Service Manual

3-85
Confidential
13. OTHERS PROBLEMS
■ The machine is not turned on, or the LCD indication does not appear.
■ The fan does not work.
Step Cause Check Result Remedy
1
Harness
connection
failure of LCD
panel PCB
Is the harness of the
LCD panel PCB ASSY
connected correctly?
No
Reconnect the LCD panel
PCB ASSY harness.
2
LCD panel PCB
failure
Is the problem solved
after replacing the LCD
panel PCB ASSY?
Yes
Replace the LCD panel
PCB ASSY.
3
LCD panel failure Is the problem solved
after replacing the LCD
panel ASSY?
Yes
Replace the LCD panel
ASSY.
4
Low-voltage
power supply
failure
Is the problem solved
after replacing the LVPS
PCB unit?
Yes
Replace the LVPS PCB
unit.
5
Main PCB Is the problem solved
after replacing the main
PCB ASSY?
Yes
Replace the main PCB
ASSY.
(Verify the position of each fan referring to "4.20 Operational Check of Fans (Function
code 78)" in Chapter 7.)
Step Cause Check
Result Remedy
1
Harness
connection
failure of the
appropriate fan
Is the harness of the
appropriate fan
connected correctly?
No
Reconnect the harness of
the appropriate fan
correctly.
2
Charge HVPS
PCB failure
Is the problem solved
after replacing the
charge HVPS PCB
ASSY?
Yes
Replace the charge HVPS
PCB ASSY. Replace the
fuser unit fan (FU) and air
intake fan (AIR).
3
Low-voltage
power supply
failure
Is the problem solved
after replacing the LVPS
PCB unit?
Yes
Replace the LVPS PCB
unit. Replace the LVPS fan
(PS).
4
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