Ricoh B230 Service Manual

							 
SM 4-31 B230/B237 
Trouble 
shooting 
 
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures) 
364  D  TD sensor (Vt high) error 2: K 
365  D  TD sensor (Vt high) error 2: M 
366  D  TD sensor (Vt high) error 2: C 
367  D  TD sensor (Vt high) error 2: Y 
  The Vt value of the black, magenta, cyan, or yellow TD sensor is 
below the specified value with SP3020-004 (default: 0.5V) for 10 
counts. 
  ƒ  TD sensor harness disconnected, loose, defective 
ƒ  A drawer connector disconnected, loose, defective 
ƒ  TD sensor defective 
   1.  Check the black, magenta, cyan, or yellow TD sensor 
connector and harness between the TD sensor and PCU for 
damage. 
2.  Check the drawer connector. 
3. Replace the defective PCU. 
  
						

							 
B230/B237 4-32  SM 
 
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures) 
372  D  TD sensor adjustment error: K 
373  D  TD sensor adjustment error: M 
374  D  TD sensor adjustment error: C 
375  D  TD sensor adjustment error: Y 
  During TD sensor initialization, the output value of the black, magenta, 
cyan, or yellow TD sensor is not within the range of the specified value 
with SP3238-001 to -004 (default: 2.7V) ± 0.2V 
  ƒ  Heat seal not removed from a new developer pack 
ƒ  TD harness sensor disconnected, loose or defective 
ƒ  TD sensor defective 
ƒ  Harness between TD sensor and drawer disconnected, defective 
   1.  Remove the heat seal from each PCU. 
2. Replace the defective PCU. 
 
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures) 
Drum gear position sensor error 
The machine does not detect the drum position signal for three second 
at the drum phase adjustment. 
ƒ  Dirty or defective drum gear position sensor 
380 C 
1. Replace the drum gear position sensor. 
2. Replace the PCU. 
  
						

							 
SM 4-33 B230/B237 
Trouble 
shooting 
 
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures) 
ID sensor adjustment error 
When the Vsg error counter reaches 3, the machine detects SC400.
The Vsg error counter counts 1 when the Vsg detected by ID sensor is 
more than the value (default: 4.5V) specified with SP3234-005 or less 
than the value (default: 3.5V) specified with SP SP3234-006. 
ƒ  Dirty or defective ID sensor 
ƒ  Defective ID sensor shutter 
400 D 
1.  Check the harness of the ID sensor. 
2.  Clean or replace the ID sensor. 
 
ƒ  After replacing the ID sensor, input the ID sensor correction 
coefficient with SP3362-013 to -018. For details, refer to ID 
sensor board in the Replacement and Adjustment section. 
3. Replace the IOB. 
4.  Replace the image transfer belt unit. 
 
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures) 
Image transfer unit motor error 
The motor LOCK signal is not detected for more than two seconds 
while the motor START signal is on. 
ƒ Motor overload  
ƒ  Defective image transfer unit motor 441 D 
1.  Replace the image transfer belt unit.   
2. Replace the IOB. 
  
						

							 
B230/B237 4-34  SM 
 
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures) 
Image transfer belt contact motor error 
The image transfer belt contact sensor does not detect the movement 
of actuator at the sensor while the polygon motor rotates. 
ƒ  Dirty image transfer belt contact sensor   
ƒ  Defective image transfer belt contact motor 
ƒ  Disconnected connector of image transfer belt contact sensor or 
motor 
ƒ Disconnected cable 
442 D 
1.  Replace the image transfer belt contact sensor. 
2.  Replace the image transfer belt contact motor. 
 
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures) 
Image transfer unit error 
The machine detects the encoder sensor error. 
ƒ  Defective encoder sensor 
ƒ  Image transfer unit installation error 
ƒ  Defective image transfer unit motor 
443 D 
1.  Check if the image transfer unit is correctly set. 
2.  Replace the image transfer unit motor. 
3.  Replace the image transfer unit. 
  
						

							 
SM 4-35 B230/B237 
Trouble 
shooting 
 
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures) 
Paper transfer unit contact error 
The paper transfer unit contact sensor does not detect the movement of 
actuator at the sensor while the polygon motor rotates. 
ƒ  Defective paper transfer unit contact sensor 
ƒ  Defective paper transfer unit contact motor 
ƒ  Broken +24V fuse on PSU 
ƒ Defective IOB 
452 D 
1.  Check the connection between the paper transfer unit and PSU. 
2.  Replace the paper transfer unit contact sensor. 
3.  Replace the paper transfer unit contact motor. 
4.  Replace the +24V fuse on the PSU. 
5. Replace the IOB. 
 
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures) 
Separation power pack output error 
An interrupt checks the status of the power pack every 20 ms. This SC 
is issued if the BICU detects a short in the power pack 10 times at 
D(ac). 
ƒ  Damaged insulation on the high-voltage supply cable 
ƒ  Damaged insulation around the high-voltage power supply. 460 D 
1. Replace the high-voltage supply cable. 
2.  Replace the high-voltage power supply unit. 
3. Replace the IOB. 
  
						

							 
B230/B237 4-36  SM 
 
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures) 
Toner transport motor error 
The LOCK signal is not detected for 2 seconds when the transport 
motor turns on. 
ƒ  Toner transport motor overload 
ƒ  Disconnected or broken harness 
ƒ  Defective toner transport motor 
ƒ  Opened +24V fuse on the PSU 
ƒ  Defective interlock switch 
490 D 
1.  Check or replace the harness. 
2.  Replace the toner transport motor. 
3.  Replace the +24V fuse on the PSU. 
4.  Replace the interlock switch. 
 
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures) 
High voltage power: Drum/ development bias output error 
An error signal is detected for 0.2 seconds when charging the drum or 
development. 
ƒ High voltage leak 
ƒ Broken harness 
ƒ  Defective drum unit or development unit 
ƒ  Defective high voltage supply unit 
491 D 
1.  Check or replace the harness. 
2.  Replace the drum unit or paper transfer unit. 
3.  Replace the high voltage supply unit. 
  
						

							 
SM 4-37 B230/B237 
Trouble 
shooting 
 
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures) 
High voltage power: Image transfer/ paper transfer bias output error 
An error signal is detected for 0.2 seconds when charging the 
separation, image transfer bet or paper transfer roller. 
ƒ High voltage leak 
ƒ Broken harness 
ƒ  Defective image transfer belt unit or paper transfer unit 
ƒ  Defective high voltage supply unit 
492 D 
1.  Check or replace the harness. 
2.  Replace the image transfer belt unit or paper transfer unit. 
3.  Replace the high voltage supply unit. 
 
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures) 
Temperature and humidity sensor error 2 
ƒ  The thermistor output of the temperature sensor was not within the 
prescribed range (0.5V to 4.2V). 
ƒ  The thermistor output of the humidity sensor was not within the 
prescribed range (0.01V to 2.4V). 
ƒ  Temperature and humidity sensor harness disconnected, loose, 
defective 
ƒ  Temperature and humidity sensor defective 
498 C 
1.  Check the connector and harness. 
2. Replace the temperature/humidity sensor. 
  
						

							 
B230/B237 4-38  SM 
 
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures) 
501  B  Paper Tray 1 error 
502  B  Paper Tray 2 error 
  When the tray lift motor is turned on, (if the upper limit is not detected 
within 10 seconds), the machine asks the user to reset the tray. If this 
condition occurs three consecutive times, the SC is generated. 
  ƒ  Defective paper lift sensor 
ƒ  Defective tray lift motor 
ƒ  Defective bottom plate lift mechanism 
ƒ Defective IOB 
   1.  Check if the bottom plate smoothly moves up and down manually. 
2.  Check and/or replace the tray lift motor. 
3. Replace the IOB. 
  
						

							 
SM 4-39 B230/B237 
Trouble 
shooting 
 
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures) 
Tray 3 error (Paper Feed Unit or LCT) 
For the paper feed unit: 
ƒ  When the tray lift motor is turned on, the upper limit is not detected 
within 10 seconds 
For the LCT: 
ƒ  SC 503-01 occurs if the upper or lower limit is not detected within 8 
seconds when the tray lift motor is turned on to lift or lower the tray.
For the paper feed unit: 
ƒ  Defective tray lift motor or connector disconnection 
ƒ Defective lift sensor or connector disconnection 
For the LCT: 
ƒ  Defective stack transport clutch or connector disconnection 
ƒ  Defective tray motor or connector disconnection 
ƒ  Defective end fence home position sensor or connector 
disconnection 
ƒ  Defective upper limit sensor or connector disconnection 
ƒ  Defective tray lift motor or connector disconnection 
503-01 B 
1.  Check the cable connections. 
2.  Check and/or replace the defective component. 
  
						

							 
B230/B237 4-40  SM 
 
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures) 
Tray 3 error (Paper Feed Unit or LCT) 
This SC is generated if the following condition occurs 3 consecutive 
times. 
For the paper feed unit: 
ƒ  When the tray lowers, the tray lift sensor does not go off within 1.5 
sec.  
For the LCT: 
ƒ  When the main switch is turned on or when the LCT is set, if the 
end fence is not in the home position (home position sensor ON), 
the tray lift motor stops.   
ƒ  If the upper limit does not go off for 1.5 seconds even the tray lift 
motor turns on to lower the tray after the upper limit has been 
detected at power on. 
For the paper feed unit: 
ƒ  Defective tray lift motor or connector disconnection 
ƒ Defective lift sensor or connector disconnection 
For the LCT: 
ƒ  Defective stack transport clutch or connector disconnection 
ƒ  Defective tray motor or connector disconnection 
ƒ  Defective end fence home position sensor or connector 
disconnection 
503-02 B 
1.  Check the cable connections. 
2.  Check and/or replace the defective component.