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

Page 92
Image 92
Brother HL-1260 service manual Motor Malf is displayed The main motor rotation disabled