Control Panel Problems; No Display On Lcd/Incorrect Display On Lcd; No Display On Led; The Control Panel Does Not Work - Brother MFC-J5335DW Service Manual

4.6

Control Panel Problems

4.6.1 No display on LCD/Incorrect display on LCD

Step
1 Panel flat cable connection
failure
2 LCD flat cable connection
failure
3 Breakage of panel flat cable
4 LCD PCB defective
5 LCD defective
6 Control panel ASSY defective
7 Power cord or power supply
PCB defective
8 Main PCB defective

4.6.2 No display on LED

Step
1 Panel flat cable connection
failure
2 Breakage of panel flat cable
3 Panel PCB defective
4 LCD PCB defective
5 Control panel ASSY defective
6 Power cord or power supply
PCB defective
7 Main PCB defective

4.6.3 The control panel does not work

Step
1 Panel flat cable connection
failure
2 Panel PCB defective
3 LCD PCB defective
4 Key defective
5 Main PCB defective
Cause
Reconnect the panel flat cable.
Reconnect the LCD flat cable.
Replace the panel flat cable.
Replace the LCD PCB.
Replace the LCD ASSY.
Replace the control panel ASSY.
Replace the power cord or power supply PCB
ASSY.
Replace the main PCB.
Cause
Reconnect the panel flat cable.
Replace the panel flat cable.
Replace the panel PCB ASSY.
Replace the LCD PCB.
Replace the control panel ASSY.
Replace the power cord or power supply PCB
ASSY.
Replace the main PCB.
Cause
Reconnect the panel flat cable.
Replace the panel PCB ASSY.
Replace the LCD PCB.
Replace the control panel ASSY.
Replace the main PCB.
2-74
Solution
Solution
Solution
Confidential