Ricoh JP5000 Service Manual page 144

1 July, 1998
Code Title
SC04-20 Master cut error
SC05-00 Main motor lock
(1st drum
position sensor
does not turn on)
SC05-01 Main motor lock
(motor control
signal error)
SC05-10 Image shift HP
sensor remains
on
SC05-11 Image shift HP
sensor remains
off
SC05-12 No image
position encoder
pulse
SC05-20 Drum shift HP
sensor remains
on
SC05-21 Drum shift HP
sensor remains
off
SC05-22 No drum shift
sensor pulse
SC05-30 Drum thermistor
open
Conditions
If the master edge sensor
remains on even after the first
master cut recovery operation.
(Normally, the master is cut if the
master edge sensor detects a
mis-cut master the first time.)
At power on or when the drum
returns to home position, the 1st
drum position sensor is not
activated for more than 3.75
seconds after the main motor on
signal is generated.
The CPU on the motor control
board detects an abnormal signal
from the main motor encoder.
At power on, the sensor is not de-
activated for more than 25
seconds after the image shift
motor on signal is generated.
At power on, the sensor is not
activated for more than 25
seconds after the image shift
motor on signal is generated.
At power on or when the image
up/down shift mode is selected,
the CPU detects no encoder
pulse from the sensor for more
than 25 seconds after the image
shift motor on signal is
generated.
At power on, the sensor is not de-
activated for more than 6
seconds after the drum shift
motor on signal is generated.
At power on, the sensor is not
activated for more than 6
seconds after the drum shift
motor on signal is generated.
At power on or when the image
side-to-side shift mode is
selected, the CPU detects no
encoder pulse from the sensor for
more than 6 seconds after the
drum shift motor on signal is
generated.
The signal from the thermistor
beside the ink detecting pins
reaches 4.5 volts.
4-7
SERVICE CALL CODES
Possible Causes
• Defective master edge
sensor
• Defective cutter unit
• Defective master
vacuum fans
• Jammed master
• Defective sensor
• Defective main motor
• Defective main motor
• Defective sensor
• Defective motor
• Defective sensor
• Defective motor
• Defective sensor
• Defective sensor
• Defective motor
• Defective sensor
• Defective motor
• Defective sensor
• Thermistor open circuit
• Related connector
disconnected