Brother HL-1040 - Manual (Page 92)

IV-25
M-8 Scanner failure
Possible cause Step Check Result Remedy
Harness
connection
failure 1 Is the connection of the
scanner motor connector P5
on the panel sensor PCB
secured? No Reconnect the connectors
securely.
Power supply
input 2 Is the voltage between pins 1
(+24VDC) and 2 (GND) of
connector P5 on the panel
sensor PCB 24VDC? No Check if +24VDC is supplied
between pins 1 (+24VDC) and
4 (+24VRET) of connector P8
on the panel sensor PCB. If
not, check the power supply
output on the low-voltage
power supply PCB.
Yes Replace the scanner unit.