Read Sharp AR-LC1 (serv.man2) Service Manual online
[9] TROUBLESHOOTING
1. Trouble code list
Trouble
code
Trouble
Remarks
Trouble
detection
U6
09
LCC lift motor trouble
—
LCC
20
LCC communication trouble
—
PCU
21
LCC transport motor trouble
—
LCC
22
LCC 24V power trouble
—
LCC
2. Self-diagnostics
Trouble
code
Details of trouble
U6
09
Content
LCC lift motor trouble
Detail
LCC lift motor trouble
Cause
Sensor defective
LCC control PWB defective
Gear broken
Lift motor defective
LCC control PWB defective
Gear broken
Lift motor defective
Check and
remedy
remedy
Check sensor operation with SIM4-2.
Check lift motor operation with
SIM4-3.
Check lift motor operation with
SIM4-3.
20
Content
LCC communication trouble
Detail
Communication trouble with LCC
Error at communication line test
when power is turned on or leaving
SIM.
Error at communication line test
when power is turned on or leaving
SIM.
Cause
Connector: Defective connection of
harness or broken wire
LCC control PWB defective
Control PWB (PCU) defective
Control PWB (PCU) defective
Malfunction due to noise
harness or broken wire
LCC control PWB defective
Control PWB (PCU) defective
Control PWB (PCU) defective
Malfunction due to noise
Check and
remedy
remedy
Can be reset by turning on and off
power supply.
Check communication line connector
and harness.
power supply.
Check communication line connector
and harness.
21
Content
LCC transport motor trouble
Detail
LCC transport motor operation
trouble
trouble
Cause Motor
lock
Motor speed error
Overcurrent to motor
LCC control PWB defective
Overcurrent to motor
LCC control PWB defective
Check and
remedy
remedy
Check transport motor operation with
SIM4-3.
SIM4-3.
22
Content
LCC24V power supply error
Detail
No power supply (24V) to LCC
Cause
Connector: Harness connection
defective or broken wire
LCC control PWB defective
Power supply unit defective
defective or broken wire
LCC control PWB defective
Power supply unit defective
Check and
remedy
remedy
Check power supply line connector
and harness.
Check for 24V at power supply unit
and LCC control PWB
and harness.
Check for 24V at power supply unit
and LCC control PWB
*
Displayed on the control panel of the copier
If a trouble occurs, check the cause of the trouble using the following
flow charts.
flow charts.
N: No Y: Yes
A. LCC does not operate
N
Y
N
Y
N
Y
N
A
F
Y
D
B
Is interface
harness properly
connected?
+5V between
CN-B-7 and 8 of
control PWB?
+24V between
CN-B9 and 10 of
control PWB?
Ready state after
setting paper?
Connect properly.
Check and if necessary
replace harness.
Check and if necessary
replace harness.
9 – 1
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