Brother MFC-8370DN Service Manual

3-21
Confidential
■ Error code 76
Rapid temperature rising failure (center thermistor)
Error code 78
Rapid temperature falling failure (center thermistor)
■ Error code 7A
No detection of main motor synchronous signal
■ Error code 7D
Dirt on corona wire (detect discharge error)
Print Unable 76
Turn the power off and then back on again.
Print Unable 78
Turn the power off and then back on again.
Step Cause Remedy
1 Fuser unit failure Replace the fuser unit.
2 Main PCB failure Replace the main PCB ASSY.
Print Unable 7A
See Troubleshooting and routine maintenance chapter in User's
Guide.
Step Cause Remedy
1 Motor failure Replace the main motor.
2 Main PCB failure Replace the main PCB ASSY.
Drum Error
Open the Front Cover and slide the blue tab across the Drum Unit
several times.
<User Check>
• Clean the corona wire in the drum unit.
• Replace the drum unit with a new one.
Step Cause Remedy
1
Dirt or dust on drum unit
electrodes
Clean the electrodes of the main body and
the drum unit. (Refer to Fig. 3-3)
2 Charge HVPS PCB failure Replace the charge HVPS PCB ASSY.
3 Main PCB failure 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