Troubleshooting - Sharp AR-LC1 Service Manual

[9] TROUBLESHOOTING

1. Trouble code list
Trouble
Trouble
code
U6 09 LCC lift motor trouble
20 LCC communication trouble
21 LCC transport motor trouble
22 LCC 24V power trouble
2. Self-diagnostics
Trouble
code
U6 09 Content LCC lift motor trouble
Detail LCC lift motor trouble
Cause Sensor defective
LCC control PWB defective
Gear broken
Lift motor defective
Check and Check sensor operation with SIM4-2.
remedy 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.
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
Check and Can be reset by turning on and off
remedy power supply.
Check communication line connector
and harness.
21 Content LCC transport motor trouble
Detail LCC transport motor operation
trouble
Cause Motor lock
Motor speed error
Overcurrent to motor
LCC control PWB defective
Check and Check transport motor operation with
remedy 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
Check and Check power supply line connector
remedy and harness.
Check for 24V at power supply unit
and LCC control PWB
* Displayed on the control panel of the copier
Trouble
Remarks
detection
— LCC
— PCU
— LCC
— LCC
Details of trouble
9 – 1
If a trouble occurs, check the cause of the trouble using the following
flow charts.
N: No Y: Yes
A. LCC does not operate
A
Is interface
N
harness properly
connected?
Y
+5V between
N
CN-B-7 and 8 of
control PWB?
Y
+24V between
N
CN-B9 and 10 of
control PWB?
Y
Ready state after
N
setting paper?
Y
B D
Connect properly.
Check and if necessary
replace harness.
Check and if necessary
replace harness.
F