Brother HL-1260 service manual Motor Malf is displayed The main motor rotation disabled

M-11

"54 MOTOR MALF" is displayed (The main motor rotation disabled)

Possible cause	Step	Check	Result	Remedy
Low-voltage power	1	Is the voltage of P7-1 in the main PCB	No	Replace the main PCB assy
supply PCB		connector +24V?		low-voltage power supply PCB
LV harness				assy, or the LV harness.
Main PCB
DC motor harness	2	Does the voltage of P7-4 in the main PCB	No	Replace the main PCB assy.
DC motor assy.		connector drop from 5V to 0V after dropping
			Yes	Replace the DC motor harness
		the voltage of P7-3 from 5V to 0V?
				or the DC motor assy.

M-12 No paper pick-up from cassette (or MP tray)

Possible cause	Step	Check	Result	Remedy
Mis-operation	1	Is the paper feed mode set correctly?	No	Set paper feed mode
				correctly.
Main PCB	2	Does the voltage of P3-20 (or 19) in the main	No	Replace the main PCB assy.
		PCB connector rise from 0V to 5V and is a
		pulses having about 11ms period generated
		at P3-6, 7, 8 ,9 pin?
Feed flat cable	3	Does the voltage of P5-20 (or 19) in the paper	No	Replace the feed flat cable.
		feeder PCB. Connector rise from 0V to 5V
		and is the pulses having about 11ms period
		generated at P3-6, 7, 8 ,9 pin?
Paper feeder	4	Does the voltage of P3-1 (or P4-1) in the	No	Replace the Paper feed/size-
PCB		paper feeder PCB connector drop from		SW PCB assy.
		24V to 0V and is the chopping pulses
		generated at P1-1, 2, 5 ,6 pin?
Pick-up(or MP	5	Does the pick-up (or MP Pick) solenoid	No	Replace the pick-up (or MP
Pick) solenoid		operate?		Pick) solenoid.
Paper feed motor	6	Does the pick-up motor rotate?	No	Replace the paper feed motor assy.

VI - 15