Brother MFC5890CN
Troubleshooting. Control panel and LCD, FAX, Communications problems
1 Control panel and LCD problems
| Problem | Check: |
|---|---|
| (1) LCD shows nothing. | • LCD and its flat cable • Panel-main harness • Control panel PCB • Power supply PCB • Main PCB |
| (2) Control panel inoperative. | • Panel-main harness • Control panel PCB • Rubber keypads • Main PCB |
2 FAX problems
| Problem | Check: |
|---|---|
| (1) No faxes will be able to be sent. | • Rubber keypads • Control panel PCB • Main PCB • MJ PCB |
| (2) Speed dialing will not work. | • Ordinary dialing function If it works normally, check the main PCB; if not, refer to item (1) above. |
| (3) Dial does not switch between tone and pulse. | • Main PCB |
| (4) The ringer does not sound. | • Speaker • Main PCB • MJ PCB |
3 Communications problems
| Problem | Check: |
|---|---|
| (1) No tone is transmitted. | • Main PCB • MJ PCB |