Ricoh MP C4504 / MP C5504 / MP C6004 Service Call 441 - 498

20 febrero 2020 Troubleshooting

SC400 (Engine: Around the Drum)

SC441-00

Type: D Error Name: Drum transfer motor: Lock
Error Condition: Lock signals are observed at 2 sec intervals during motor ON, and a High level is detected at least 20 times.

Major Cause:

• Motor defective
• Connector disconnected
• Harness broken
• IOB defective
• Unit torque increased.

Solution:

• Replace the motor
• Reconnect the connector
• Replace the harness
• Replace the IOB
• Check the load on the motor (PCDU, Image transfer unit, Paper
transfer unit, Waste toner bottle).
• Replace the PCDU, Image transfer unit, Paper transfer unit or Waste
toner bottle.

SC442-00

Type: D Error Name: ITB Lift Error
Error Condition: Even though the ITB lift motor (also Toner supply motor (M)) rotates, the ITB lift sensor failed to detect the specified sensor feeler status within specified time.
• Contact/separation operation: If not detected in 2000msec
• Home position operation: If not detected in 5000msec Signal detection sampling period: 10msec

Major Cause:

• Image transfer unit not set/faulty setting
• Sensor dirt
• Sensor defective
• Motor defective
• Unit load large

Solution:

• Reset the Image transfer unit
• Clean the sensor
• Replace the sensor
• Replace the contact/separation drive unit
• Replace the image transfer unit
• Check the harness

SC443-00

Type: D Error Name: Image transfer encoder error/Image transfer unit set fault
Error Condition: During encoder count of the transfer motor, if there is no effective edge interrupt for 1.5 sec, and there is an overflow for 1.5 seconds
consecutively, it is determined that there is an encoder error, SC443-00
is logged, and the system shifts to FG control without stopping the transfer
motor.
This error does not occur in this machine, because it does not have an
encoder.

Major Cause:

• Encoder defective
• Transfer motor defective
• Connector disconnected
• Harness broken

Solution:

• Replace the image transfer unit
• Replace the transfer motor
• Reset the connector
• Replace the harness
• Ensure that SP2-920-07 to 009 is set to «1(FG)». It must not be set to «0».

SC444-00

Type: D Error Name: Image transfer phase sensor error
Error Condition: Phase sensor signal does not become L->H or H->L for 1.2 sec (time to perform 1.5 or more rotations even when transfer gear is at minimum speed) during motor ON, an image transfer phase sensor error log SC is displayed.

Major Cause:

• Sensor dirt
• Sensor defective
• Connector disconnected
• Harness broken

Solution:

• Clean the sensor
• Replace the sensor
• Reset the connector
• Check the harness

SC452-00

Type: D Error Name: Paper transfer contact motor error
Error Condition: Paper transfer contact motor: position sensor cannot detect the sensor filler state within the predetermined time (see below) even if the paper transfer contact motor is rotated.
• Contact operation: If not detected in 2000msec
• Home position operation: If not detected in 5000msec
Signal detection sampling period: 10msec

Major Cause:

• Sensor dirt
• Sensor defection
• Motor defection
• Unit load large

Solution:

• Replace the contact drive unit
• Replace the image transfer unit
• Check the harness

SC491-00

Type: D Error Name: High voltage power source: charge/development: output error
Error Condition: SC detection signal (charge/development) is L (abnormal) for 200 ms consecutively during high voltage (charge/development) output.

Major Cause:

H/W error
• Output contact setting fault
• Controller connector set fault
• Ground fault of output high voltage path
• Surface/air clearance insufficient (arc discharge)
• Controller harness disconnection, short-circuit
• PCU setting fault
• Control board _IOB error (related signal error)
• HVP_CB error Load error
• Grounding fault of charging output, short-circuit with other outputs
• Surface/air clearance insufficient in charging output path (including
distance from other outputs)
• Abnormal deterioration of drum, and over current due to pinholes
• Drum vs charge roller gap error (PCU error).
• Over current due to drum surface condensation
• Grounding fault of developing output, short-circuit with other outputs
• Surface/air clearance insufficient in developing output path
(including distance from other outputs)
• Other

Solution:

• Cycle the main power off/on
• Reset or replace the harness of high voltage power supply feed path
• Reset or replace the harness between IOB-HVP_CB
• Reset or replace the PCU
• Check the operation of the contact mechanism
• Replace the HVP_CB
• Replace the IOB

SC492-00

Type: D Error Name: High voltage power source: image transfer/paper transfer: output error
Error Condition: SC detection signal (transfer) is L (abnormal) for 200 ms consecutively during high voltage (transfer) output.

Major Cause:

H/W error
• Output power connector setting fault
• Controller connector setting fault
• Output high voltage Harness disconnection
• Controller harness disconnection, short-circuit
• Transfer unit setting fault
• Control board_ IOB error (related signal error)
• HVP_TTS error
Load error
• Increase in paper transfer roller impedance (low temperature
environment/impedance rise/impedance rise due to dirt)
• Operation fault of paper transfer contact mechanism
• Increase in image transfer belt impedance
• Opening in load power supply path

Solution:

• Reset or replacement the harness of high voltage power supply feed path
• Reset or replace the harness between IOB-HVP_TTS
• Reset or replace the transfer unit
• Check operation of the contact mechanism
• Replace the HVP_TTS
• Replace the IOB

SC493-00

Type: D Error Name: High voltage power source: DS development: output error
Error Condition: «HVP:DS: output error detection signal» is detected “0” (abnormal) for 10 times consecutively (for 200ms) during output of the PWM signal used as an error detection target

Major Cause:

• Leak harness fault
• Unit fault
• High voltage power source fault

Solution:

• Turn the power off/on
• Reset or replacement the harness of high voltage power supply feed path
• Reset or replace the unit
• Replace the high voltage power source

SC497-00

Type: C Error Name: Machine temperature detection thermistor error
Error Condition: Temperature sensor output error: Below 0.56V (90 degrees or more), or above 3.0V (below -18 degrees)

Major Cause:

• Connector disconnection or broken
• Sensor defective

Solution:

• Check the sensor setting
• Replace the imaging temperature sensor (thermistor)

SC498-00

Type: C Error Name: Temperature and humidity sensor error
Error Condition: Temperature sensor output error: Below 0.76V, or above 2.90V, or Moisture sensor output error: more than 2.4V

Major Cause:

• Sensor not setting (disconnection or broken)
• Sensor defective

Solution:

• Check the sensor setting
• Replace the sensor

 

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