K117sm7e2
7-34
7. 3. 1. 6 Motor rotates endlessly at the time of turning on
Cause Checking
order
Checking Result Treatment
Foreign substance 1 Is there any foreign substance under
Upper Unit, which blocks the light of
sensor?
Yes Remove it.
Home Position
Sensor
2 Is the home position correctly detected?
(New Scanner only)
No 1. Check if the cable is
correctly plugged into
the Home Position
Sensor.
2. Check the Home
Position Sensor and
replace it if broken.
Cables of Main PCB 3 Are cables correctly and surely plugged
to the Main PCB?
No Plug them correctly to the
Main PCB. Replace the
cable if it is damaged.
Main PCB 4 Can you fix the problem if you replace
Main PCB?
Yes OK
7. 3. 1. 7 Scanner is not recognized
Cause Checking
order
Checking Result Treatment
USB Driver 1 Does the PC recognize USB? No Check the USB Driver in
Device Manager.
USB Cable 2 Is there any problem with the USB
cable, such as breakage, short-circuit
and damage of connector pin?
Yes Replace the USB Cable.
DC Power Supply 3 Is the DC Power Supply on the printer
part normal?
No Replace the DC Power
Supply.
Main PCB 4 Prepare another PC which can
recognize another type of USB
Scanner.
Is it also impossible to recognize the
K117SC with this PC?
Yes Replace the Main PCB.
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