Brother HL-1260 service manual no Cartridge is displayed

M-7 " CHECK XX TRAY " is displayed even if a paper-loaded cassette is mounted (or even if a paper is set on MP tray) XX is MP/T1/T2

Possible cause	Step	Check	Result	Remedy
Mis-operation	1	Is the paper feed mode set correctly?	No	Set paper feed mode
				correctly.
Actuator	2	Does the actuator for the paper empty sensor	No	Reassemble or replace the
		operate smoothly?		actuator.
Paper empty	3	Does the voltage of P5-3 (or P5-14) in the	No	Replace the paper feed/size-
sensor		Paper feeder PCB connector rise from 0V to		sw PCB assy or feed flat
Feed flat cable		5V when the paper empty sensor is covered?		cable .
Paper feed flat	4	Does the voltage of P3-3 (or P3-14) in the main	No	Replace the feed flat cable.
cable		PCB connector rise from 0V to 5V when the
				Replace the main PCB assy.
Main PCB		paper empty sensor is covered?	Yes

M-8 "14 NO CARTRIDGE " is displayed

Possible cause	Step	Check	Result	Remedy
EP-ED cartridge	1	Is an EP-ED cartridge installed correctly?	No	Install the EP-ED cartridge
				correctly.
Transfer unit	2	Is the electrode of the transfer unit dirty?	Yes	Clean the electrode of the
electrode				transfer unit.
High-voltage	3	Is the voltage of P4-13 in the high-voltage	Yes	Replace the high-voltage
power supply		power supply PCB connector higher than that		power supply PCB assy.
PCB		of P4-11 over 2.5V?
HV harness	4	Is the voltage of P6-13 in the main PCB	Yes	Replace the HV harness.
		connector higher than that of P6-11 over 2.5V?
Main PCB			No	Replace the main PCB assy.

VI - 13