Brother MFC-J6920DW Service Manual

Confidential
2-73
4.6 Control Panel Problems
4.6.1 No display on LCD
4.6.2 No display on LED
4.6.3 The control panel does not work
4.6.4 Touch panel inoperative
Step Cause Solution
1 LCD PCB harness connection
failure
Reconnect the LCD PCB harness.
2 LCD harness connection
failure
Reconnect the LCD harness.
3 LCD unit defective Replace the LCD unit.
4 LCD PCB ASSY defective Replace the LCD PCB ASSY.
5 Power supply PCB and
power cord defective
Replace the power supply PCB ASSY.
6 Main PCB defective Replace the main PCB ASSY.
Step Cause Solution
1 LCD PCB harness connection
failure
Reconnect the LCD PCB harness.
2 Panel PCB harness
connection failure
Reconnect the panel PCB harness.
3 LCD PCB ASSY defective Replace the LCD PCB ASSY.
4 Panel PCB defective Replace the panel ASSY.
5 Power supply PCB and
power cord defective
Replace the power supply PCB ASSY.
6 Main PCB defective Replace the main PCB ASSY.
Step Cause Solution
1 Panel PCB harness
connection failure
Reconnect the panel PCB harness.
2 Panel PCB defective Replace the panel ASSY.
3 Power supply PCB defective Replace the power supply PCB ASSY.
4 Main PCB defective Replace the main PCB ASSY.
Step Cause Solution
1 LCD PCB harness connection
failure
Reconnect the LCD PCB harness.
2 Touch panel harness
connection failure
Reconnect the touch panel harness.
3 LCD PCB ASSY defective Replace the LCD PCB ASSY.
4 Touch panel ASSY defective Replace the touch panel ASSY.
5 Power supply PCB defective Replace the power supply PCB ASSY.
6 Main PCB defective Replace the main PCB ASSY.

Brother MFC-J6920DW Specifications

General

Type	all in one
Tray Capacity	500
Automatic Document Feeder Capacity	35 sheets
Paper Size	11" x 17"
Paper Handling	up to 500 sheets
Color Print Speed	20 pages per minute
Mono Print Speed	22 pages per minute
Print Resolution Mono	up to 6000 x 1200
Print Resolution Color	up to 6000 x 1200
Scanner Type	flatbed
Scan Resolution	up to 2400 x 1200
Copier Resolution Mono	up to 2400 x 1200
Copier Resolution Color	up to 2400 x 1200
Fax Function	yes
Cartridges	lc103bk/c/m/y
Number Of Cartridges	4
Internal Memory	no
Memory Card	yes
Network	wireless
Connectivity	usb
OS Compatibility	pc: windows server 2003, server 2003 r2, server 2008, server 2008 r2, server 2012, xp home, xp professional, vista, 7 or 8, mac: os x v10.6x, 10.7x or 10.8x
Mobile Devices Connection	yes

Weight and Dimensions

Height	21.9 inches
Width	17 inches
Net Weight	36.4 pounds