READING SC740/741 DETAILS FROM LED2:
SM 4-25 B135/B138
Trouble
shooting
Error
Type
Error
Code
Description Status Possible Cause
1-5-1
1-5-2
Stapler motor After the stapler motor turns on to
After the stapler motor turns on to
return the stapler unit to its home
position, the stapler unit HP sensor
does not activate within 4 secs.
• Stapler motor
defective
• Stapler unit HP
sensor
defective
1-6-1 The staple hammer HP sensor
does not deactivate within 0.5
secs. after the staple hammer
motor turns on.
1-6-2
Staple hammer
motor error
The staple hammer HP sensor
does not activate within 0.5 secs.
after the staple hammer motor
turns on.
• Staple hammer
motor defective
• Staple hammer
HP sensor
defective
1-7-1 The tray lift motor does not stop
within 15secs. after being turned
on. The shift tray HP sensor does
not activate within 15 secs. after
the tray lift motor turns on.
1-7-2 The shift tray upper limit switch
turns on while the shift tray is being
raised.
1-7-3
Tray lift motor
error
Lift motor sensors 1 & 2 do not
send the clock signals to the
finisher board every 200 ms while
the tray lift motor is on.
• Tray lift motor
defective
• Lift motor
sensor 1
defective
• Lift motor
sensor 2
defective
• Shift tray HP
sensor defective
• Shift tray upper
limit switch
defective
1-8-1
Abnormal communication data
between finisher board and shift
tray height sensor.
1-8-2 No communication between
finisher board and shift tray height
sensor for a certain period.
1-8-3 The finisher board detects a
connection error with the connector
for the shift tray height sensor.
1-8-4
Shift tray height
sensor error
Adjustment error during shift tray
height sensor adjustment.
• Shift tray height
sensor defective
• Finisher board
defective
1-9-1 Back-up RAM
error
The check sum is abnormal when
the main switch is turned on.
• Finisher board
defective
1-10-1 Communication error between
finisher board and copier
mainframe.
SC
1-10-2
Communication
error
Communication error between
finisher board and booklet unit
board.
• Finisher board
defective
• Booklet unit
board defective
• Poor connection
of the interface
Rev. 04/2004
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