Sharp AR-LC1 Service Manual page 19

B. Lift motor error
B
N
Is fuse blown out?
Y
Is load on motor
N
shaft normal?
Y
Is upper limit
N
sw on paper feed
UN turned on?
Y
Is harness
N
connected properly?
Y
Does motor rotate
N
even slightly?
Y
Is motor
N
encoder sensor
output normal?
Y
Replace fuse.
Check mechanical load
and driving system, and
remove any foreign matter.
Lower tray until upper
limit switch turns off.
Connect harness properly.
Check harness and if
necessary replace.
Is voltage
N
applied to motor
connector?
Y
Check and if necessary
replace motor.
D
Check and if necessary
replace control PWB.
C. Transport motor error
C
Is load on motor
shaft normal?
Y
Is harness
connected properly?
Y
Does motor rotate
even slightly?
Y
Is motor encoder
output normal?
Y
D. Sensor error
D
Check for
sensor mounting.
Is harness connected
properly?
Y
Replace control PWB.
9 – 2
Check mechanical load
N
and driving system, and
remove any foreign matter.
Connect harness properly.
N
Check and if necessary
replace harness.
N
Is voltage applied to
motor connector?
Y
Check and if necessary
N
replace motor.
Check and if necessary
replace control PWB.
Check mounting and if
N
necessary replace harness.
N