Brother MFC-9840CDW, DCP-9045CDN FAX can't be received, Speed dialing and One-touchdialing can't be used

Speed dialing and One-touch dialing can't be used.

Step	Possible cause	Check	Result	Remedy
1	Speed dialing	Can a fax transmission	Yes	Replace the main PCB
	keys or one-touch	be made using the		ASSY.
	dialing keys	numeric keys?
2	Dialing mode	Does a dialing signal (PB	Yes	Check the dialing mode
	Setting	or DP) come out normally		setting at customer's
		in each mode?		again.
		(Use telephone line		Check the telephone line
		emulator.)		cord between machine and
				socket.
3	Connection	Are the main PCB and	No	Reconnect the connector
	between main	NCU PCB connected		properly.
	PCB and NCU	properly?
	PCB
4	Harness between	Is the harness damaged?	Yes	Replace the harness with
	main PCB and			a normal one.
	NCU PCB
5	Connection	Are the main PCB and	No	Reconnect the connector
	between main	control panel PCB		properly.
	PCB and control	connected properly?
	panel PCB
6	Harness between	Is the harness damaged?	Yes	Replace the harness with
	main PCB and			a normal one.
	control panel PCB
7	Contact of rubber	Is the problem solved	No	Replace the rubber Key.
	key	after replacing the rubber
		key?
8	NCU PCB	Is the problem solved	Yes	Replace the NCU PCB
		after replacing the NCU		ASSY.
		PCB ASSY?
9	Control panel	Is the problem solved	Yes	Replace the control panel
	PCB	after replacing the control		PCB.
		panel PCB?

FAX can't be received.

User Check

- Verify that the telephone cord is securely inserted.

Step	Possible cause	Check	Result	Remedy
1	Receive mode	Is the receive mode set to	No	Set the receive mode to
	setting	automatic receive mode?		automatic receive mode.
2	NCU PCB	Is the problem solved	Yes	Replace the NCU PCB
		after replacing the NCU		ASSY.
		PCB ASSY?
3	Main PCB	Is the problem solved	Yes	Replace the main PCB
		after replacing the main		ASSY.
		PCB ASSY?

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