Ricoh D027 User manual

D027/D029
SERVICE MANUAL
(Book 1 of 2) 003984MIU
MAINFRAME

SC Tables
SM 3-5 D027/D029 APPENDICES
Appendix
Service Call
Conditions
3.1.2 SERVICE CALL TABLES - 1
SC1xxx: Scanning
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
Exposure lamp error
The peak white level is less than 64/255 digits (8 bits) when scanning
the shading plate.
Exposure lamp defective
Lamp stabilizer defective
Exposure lamp connector defective
Standard white plate dirty
Scanner mirror or scanner lens out of position or dirty
101 D
1. Check and clean the scanner mirror(s) and scanner lens.
2. Check and clean the shading plate.
3. Replace the exposure lamp.
4. Replace the lamp stabilizer.
5. Replace the scanner mirror(s) or scanner lens.
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
Scanner home position error 1
The scanner home position sensor does not detect the “OFF” condition
during operation.
Scanner motor driver defective
Scanner motor defective
Harness between SIO board and scanner motor disconnected
Scanner HP sensor defective
Harness between SIO and HP sensor disconnected
120 D
1. Check the cable connection between the SIO board and scanner
motor.
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SC Tables
D027/D029 APPENDICES 3-6 SM
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
2. Check the cable connection between the SIO and HP sensor.
3. Replace the scanner motor.
4. Replace the HP sensor.
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
Scanner home position error 2
The scanner home position sensor does not detect the “ON” condition
during operation.
Scanner motor driver defective
Scanner motor defective
Harness between SIO board and scanner motor disconnected
Scanner HP sensor defective
Harness between SIO and HP sensor disconnected
121 D
1. Check the cable connection between the SIO board and scanner
motor.
2. Check the cable connection between the SIO and HP sensor.
3. Replace the scanner motor.
4. Replace the HP sensor.
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
Black level detection error
The black level cannot be adjusted within the target value during the
zero clamp.
Harness disconnected
Defective SBU
141 D
1. Check the cable connection
2. Replace the SBU.

SC Tables
SM 3-7 D027/D029 APPENDICES
Appendix
Service Call
Conditions
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
White level detection error
The white level cannot be adjusted within the target during auto gain
control.
Dirty exposure glass or optics section
SBU board defective
Exposure lamp defective
Lamp stabilizer defective
Scanner motor defective
142 D
1. Clean the exposure glass, white plate, mirrors, and lens.
2. Check if the exposure lamp is lit during initialization.
3. Check the harness connection between SBU and BICU.
4. Replace the exposure lamp.
5. Replace the scanner motor.
6. Replace the SBU board.
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
SBU communication error
The SBU connection cannot be detected at power on or recovery from
the energy save mode.
Defective SBU
Defective harness
Defective detection port on the BICU
144 D
1. Replace the harness.
2. Replace the SBU.
3. Replace the BICU.
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
161 IPU error
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SC Tables
D027/D029 APPENDICES 3-8 SM
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
The error result of self-diagnostic by the ASIC on the BICU is detected.
Defective BICU
Defective connection between BICU and SBU
001 D
1. Check the connection between BICU and SBU.
2. Replace the BICU.
Detected an error during an access to the Ri.
Defective BICU board
002 D
1. Replace the BICU board.
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
Copy Data Security Unit error
The copy data security board is not detected when the copy data
security function is set "ON" with the initial setting.
A device check error occurs when the copy data security function is
set "ON" with the initial setting.
Incorrect installation of the copy data security board
Defective copy data security board
165 D
1. Reinstall the copy data security board.
2. Replace the copy data security board.
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
Serial Number Mismatch
Serial number stored in the memory does not have the correct
code.
195 D
NVRAM defective
BICU replaced without original NVRAM

SC Tables
SM 3-9 D027/D029 APPENDICES
Appendix
Service Call
Conditions
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
1. Check the serial number with SP5-811-002.
2. If the stored serial number is incorrect, contact your supervisor.
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SC Tables
D027/D029 APPENDICES 3-10 SM
3.1.3 SERVICE CALL TABLES - 2
SC Codes Group 2: Exposure
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
Polygon motor error 1: ON timeout
The polygon mirror motor does not reach the targeted operating speed
within the specified time after turning on or changing speed
Defective or disconnected harness to polygon motor driver board
Defective polygon motor driver board
Defective polygon motor.
202 D
1. Replace the polygon motor.
2. Replace the laser optics housing unit.
3. Replace the harness.
4. Replace the BICU.
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
Polygon motor error 2: OFF timeout
The polygon mirror motor does leave the READY status within 3
seconds after the polygon motor switches off.
Disconnected or defective harness to polygon motor driver board
Defective polygon motor driver board
Defective polygon motor
203 D
1. Check or replace the harness.
2. Replace the polygon motor.
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
204 D Polygon motor error 3: XSCRDY signal error

SC Tables
SM 3-11 D027/D029 APPENDICES
Appendix
Service Call
Conditions
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
The SCRDY_N signal goes HIGH (inactive) while the laser diode is
firing.
Disconnected or defective harness to polygon motor driver board
Defective polygon motor
Defective polygon motor driver board
1. Check or replace the harness.
2. Replace the polygon motor.
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
210 C Laser synchronizing detection error: end position [K]
211 C Laser synchronizing detection error: end position [Y]
212 C Laser synchronizing detection error: end position [M]
213 C Laser synchronizing detection error: end position [C]
The laser synchronizing detection signal for the end position of LDB [K],
[Y], [M], [C] is not detected for one second after the LDB unit turned on
when detecting the main scan magnification.
Disconnected or defective harness to synchronizing detector for
end position
Defective synchronizing detector board
Defective LD board or driver
Defective BICU
- -
1. Replace the harness of the LD board.
2. Replace the laser optics housing unit.
3. Replace the BICU.
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
220 D Laser synchronizing detection error: start position [K]: LD0
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SC Tables
D027/D029 APPENDICES 3-12 SM
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
221 D Laser synchronizing detection error: start position [K]: LD1
222 D Laser synchronizing detection error: start position [Y]: LD0
223 D Laser synchronizing detection error: start position [Y]: LD1
224 D Laser synchronizing detection error: start position [M]: LD0
225 D Laser synchronizing detection error: start position [M]: LD1
226 D Laser synchronizing detection error: start position [C]: LD0
227 D Laser synchronizing detection error: start position [C]: LD1
The laser synchronizing detection signal for the start position of the
LDB [K], [Y], [M], [C] is not output for two seconds after LDB unit turns
on while the polygon motor is rotating normally.
Disconnected cable from the laser synchronizing detection unit or
defective connection
Defective laser synchronizing detector
Defective LDB
Defective BICU
- -
1. Check the connectors.
2. Replace the laser-synchronizing detector.
3. Replace the LDB.
4. Replace the BICU.
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
FGATE ON error: K
The PFGATE ON signal does not assert within 5 seconds after
processing the image in normal job or MUSIC for start position [K].
230 D
Defective ASIC (Lupus)
Poor connection between controller and BICU.
Defective BICU

SC Tables
SM 3-13 D027/D029 APPENDICES
Appendix
Service Call
Conditions
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
1. Check the connection between the controller board and the BICU.
2. Replace the BICU.
3. Replace the controller board.
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
FGATE OFF error: K
The PFGATE ON signal still asserts within 5 seconds after
processing the image in normal job or MUSIC for end position [K].
The PFGATE ON signal still asserts when the next job starts.
231 D
See SC 230 for troubleshooting details.
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
FGATE ON error: Y
The PFGATE ON signal does not assert within 5 seconds after
processing the image in normal job or MUSIC for start position [Y].
232 D
See SC 230 for troubleshooting details.
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
FGATE OFF error: Y
The PFGATE ON signal still asserts within 5 seconds after
processing the image in normal job or MUSIC for end position [Y].
The PFGATE ON signal still asserts when the next job starts.
233 D
See SC 230 for troubleshooting details.
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
234 D FGATE ON error: M
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SC Tables
D027/D029 APPENDICES 3-14 SM
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
The PFGATE ON signal does not assert within 5 seconds after
processing the image in normal job or MUSIC for start position [M].
See SC 230 for troubleshooting details.
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
FGATE OFF error: M
The PFGATE ON signal still asserts within 5 seconds after
processing the image in normal job or MUSIC for end position [M].
The PFGATE ON signal still asserts when the next job starts.
235 D
See SC 230 for troubleshooting details.
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
FGATE ON error: C
The PFGATE ON signal does not assert within 5 seconds after
processing the image in normal job or MUSIC for start position [C].
236 D
See SC 230 for troubleshooting details.
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
FGATE OFF error: C
The PFGATE ON signal still asserts within 5 seconds after
processing the image in normal job or MUSIC for end position [C].
The PFGATE ON signal still asserts when the next job starts.
237 D
See SC 230 for troubleshooting details.
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
240 C LD error: K

SC Tables
SM 3-15 D027/D029 APPENDICES
Appendix
Service Call
Conditions
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
241 C LD error: Y
242 C LD error: M
243 C LD error: C
The BICU detects LDB error a few times consecutively when LDB unit
turns on after LDB initialization.
Worn-out LD
Disconnected or broken harness of the LD
- -
1. Replace the harness of the LD.
2. Replace the laser optics housing unit.
3. Replace the BICU.
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
Line position adjustment (MUSIC) error
Line position adjustment fails four consecutive times.
Pattern sampling error ( insufficient image density )
Defective ID sensors for the line position adjustment
Defective image transfer belt unit
Defective PCU(s)
Defective laser optics housing unit
285 D
1. Check and reinstall the image transfer belt unit and PCUs.
2. Check if each toner bottle has enough toner.
3. Replace the ID sensor.
4. Replace the image transfer belt unit.
5. Replace the PCU(s).
6. Replace the laser optics housing unit.
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SC Tables
D027/D029 APPENDICES 3-16 SM
3.1.4 SERVICE CALL TABLES - 3
SC3xx: Image Processing – 1
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
300 D AC charge output error [K]
301 D AC charge output error [M]
302 D AC charge output error [C]
303 D AC charge output error [Y]
The measured voltage is not proper when IOB measures the charge
output for each color.
Disconnected or broken high voltage cable
Defective or not installed PCU
Defective high voltage power supply
- -
1. Check or replace the connectors.
2. Replace the PCU for the affected color.
3. Replace the high voltage power supply.
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
360 D TD sensor (Vt high) error 1: K
361 D TD sensor (Vt high) error 1: M
362 D TD sensor (Vt high) error 1: C
363 D TD sensor (Vt high) error 1: Y
- -
The Vt value of the black, magenta, cyan, or yellow TD sensor
exceeds the specified value (default: 4.7V) with SP3020-002 for
twenty counts.
The [Vt - Vtref] value of the black, magenta, cyan, or yellow TD
sensor exceeds the specified value (default: 5.0V) with
SP3020-001.

SC Tables
SM 3-17 D027/D029 APPENDICES
Appendix
Service Call
Conditions
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
Black, magenta, cyan, or yellow TD sensor disconnected
Harness between TD sensor and PCU defective
Defective TD sensor.
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.
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
364 D TD sensor (Vt low) error 2: K
365 D TD sensor (Vt low) error 2: M
366 D TD sensor (Vt low) error 2: C
367 D TD sensor (Vt low) 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.
TD sensor harness disconnected, loose, defective
A drawer connector disconnected, loose, defective
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.
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
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SC Tables
D027/D029 APPENDICES 3-18 SM
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
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: 2.5V) ± 0.2V
Heat seal not removed from a new developer pack
TD harness sensor disconnected, loose or defective
TD sensor defective
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)
380 C Drum gear position sensor error: K
381 C Drum gear position sensor error: M
382 C Drum gear position sensor error: C
383 C Drum gear position sensor error: Y
The machine does not detect the drum position signal for 3
seconds at the drum phase adjustment.
Dirty or
defectiv
e drum
gear
position
sensor
1. Replace
the
drum
gear

SC Tables
SM 3-19 D027/D029 APPENDICES
Appendix
Service Call
Conditions
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
position
sensor.
2. Replace
the
PCU.
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
396 D Drum/Development motor error: K
397 D Drum/Development motor error: M
398 D Drum/Development motor error: C
399 D Drum/Development motor error: Y
The machine detects a High signal from the drum/development motor
for 2 seconds after the drum/development motor turned on.
Overload on the drum/development motor
Defective drum/development motor
Defective harness
Shorted 24 V fuse on the PSU
Defective interlock system
- -
1. Check or replace the harness.
2. Replace the drum/development motor.
3. Replace the 24V fuse on the PSU.
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SC Tables
D027/D029 APPENDICES 3-20 SM
3.1.5 SERVICE CALL TABLES - 4
SC4xx: Image Processing - 2
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 SP3324-005 or less
than the value (default: 3.5V) specified with SP3324-006.
Dirty or defective ID sensor
Defective ID sensor shutter
400 D
1. Check the harness of the ID sensor.
2. Clean or replace the ID sensor.
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.
1. Replace the IOB.
2. 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.
Motor overload
Defective image transfer unit motor
441 D
1. Replace the image transfer belt unit.
2. Replace the IOB.

SC Tables
SM 3-21 D027/D029 APPENDICES
Appendix
Service Call
Conditions
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.
Dirty image transfer belt contact sensor
Defective image transfer belt contact motor
Disconnected connector of image transfer belt contact sensor or
motor
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.
Defective encoder sensor
Image transfer unit installation error
Defective image transfer unit motor
443 C
1. Check if the image transfer unit is correctly set.
2. Replace the image transfer unit motor.
3. Replace the image transfer unit.
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.
452 D
Defective paper transfer unit contact sensor
Defective paper transfer unit contact motor
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SC Tables
D027/D029 APPENDICES 3-22 SM
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
Broken +24V fuse on PSU
Defective IOB
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).
Damaged insulation on the high-voltage supply cable
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.
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.
490 D
Toner transport motor overload
Disconnected or broken harness
Defective toner transport motor
Opened +24V fuse on the PSU
Defective interlock switch

SC Tables
SM 3-23 D027/D029 APPENDICES
Appendix
Service Call
Conditions
No. Type Details (Symptom, Possible Cause, Troubleshooting Procedures)
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.
High voltage leak
Broken harness
Defective drum unit or development unit
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.
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.
High voltage leak
Broken harness
Defective image transfer belt unit or paper transfer unit
Defective high voltage supply unit
492 C
1. Check or replace the harness.
2. Replace the image transfer belt unit or paper transfer unit.
3. Replace the high voltage supply unit.
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