Brother Facsimile Equipment MFC7420 - Manual (Page 213)

Confidential 9-25
M-10 Pickup function of paper tray does not work.
Possible cause Step Check Result Remedy
Link lever
does not move
smoothly. 1 Does the link lever work?
Isn't the link lever bent? Yes Remove the cause of non-
smooth operation of the link
lever.
Replace the link lever.
Pickup roller
holder ASSY
does not move
smoothly. 2 Does the pickup roller
holder ASSY move up and
down? No Replace the pickup roller holder
ASSY.
Main motor
failure 3 Does the main motor work? No Replace the main motor.
Pressure plate
drive cam
failure 4 Does the pressure plate
drive cam rotate? No Replace the main frame L
ASSY.
M-11 The new toner is not sensed.
Possible cause Step Check Result Remedy
The toner
cartridge is
not set to the
main body
correctly 1 The toner cartridge is not
inserted completely. Yes Reset the cartridge.
New toner
detection
switch failure 2 Isn't the toner sensed even
if the switch is held? Yes Replace the switch.
Main PCB
failure 3 Is the problem solved by
replacing the main PCB? No Replace the main PCB.