Service manual

30 July, 2001 SC TABLE
4-27
SC No. Item Definition Possible Cause
Related
SCs
Troubleshooting Procedure Type
SC 731
Finisher exit
guide plate
motor error
The exit guide plate open
sensor is not activated within a
specified time after the exit
guide plate motor turns on.
• Loose connection
• Defective exit guide
plate open sensor
• Defective exit guide
plate motor
1. Turn the main switch off and on.
2. Check if the connectors of the sensor
and motor are properly connected.
3. Replace the exit guide plate open
sensor.
4. Replace the exit guide plate motor.
SC 732 Finisher tray 1
shift motor
error
Tray 1 home position is not
detected within a specified
time after the tray 1 shift motor
turns on.
• Loose connection
• Defective tray shift 1
sensor
• Defective tray 1 shift
motor
1. Turn the main switch off and on.
2. Check if the connectors of the sensor
and motor are properly connected.
3. Replace the tray shift 1 sensor.
4. Replace the tray 1 shift motor.
SC 733 Finisher tray 2
lift motor error
• The lower stack height 1
sensor is activated
consecutively (detecting
paper) for 15 seconds after
the shift tray starts moving
up.
• The lower stack height
sensor 1 is deactivated
consecutively (not detecting
paper) for 15 seconds after
the shift tray starts moving
down.
• Loose connection
• Defective lower stack
height 1 sensor
• Defective tray 2 lift
motor
• Motor overload
1. Turn the main switch off and on.
2. Check if the connectors of the sensor
and motor are properly connected.
3. Replace the lower stack height 1
sensor.
4. Replace the tray 2 lift motor.
SC 734 Finisher tray 2
shift motor
error
Tray 2 home position is not
detected within a specified
time after the tray 2 shift motor
turns on.
• Loose connection
• Defective tray shift 2
sensor
• Defective tray 2 shift
motor
1. Turn the main switch off and on.
2. Check if the connectors of the sensor
and motor are properly connected.
3. Replace the tray shift 2 sensor.
4. Replace the tray 2 shift motor.
SC 818
Watch-dog
error
While the system program is
running, other processes do
not operate at all.
• Defective controller
• Software error
1. Turn the main switch off and on.
2. Replace the controller.
3. See NOTE 1 at the end of the SC
table
CTL