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CHAPTER IV -25
M-8 BD failure
Possible cause Step Check Result Remedy
Harness
connection
failure
1 Is connector P4 on the driver
PCB secured correctly?
No Connect it securely.
M-9 Scanner failure
Possible cause Step Check Result Remedy
Harness
connection
failure
1 Is the connection of the
scanner motor connector P2 on
the driver PCB secured?
No Reconnect the connectors
securely.
Power supply
input
2 Is the voltage between pins 1
(+24VDC) and 2 (GND) of
connector P2 on the driver PCB
24 Volts DC?
No Check if +24VDC is supplied
between pins 4.5 (+24VDC)
and 2.3 (+24VRET) of
connector P13 on the driver
PCB. If not, check the power
supply output on the low-
voltage power supply PCB.
Yes Replace the scanner unit.