• Code: C2152 ... C2156
• Description: • C2152: Transfer belt fault at initial position return • C2153: Transfer belt spacing fault at K pressure switching • C2154: Transfer belt contact fault at all pressure switching • C2155: Transfer belt contact fault after K pressure established • C2156: Transfer belt spacing fault after all pressure established. • C2152: The 1st transfer pressure sensor (PS39) is unable to detect "switch from retraction to pressure" or "switch from pressure to retraction" within a given period time after the 1st transfer pressure clutch (CL5) has stared engagement during an initial position return. • C2153: The 1st transfer pressure sensor (PS39) does not detect “switch from pressure to retraction” within a given period time after 1st transfer pressure clutch (CL5) has stared engagement. • C2154: The 1st transfer pressure sensor (PS39) does not detect “switch from retraction to pressure” within a given period time after 1st transfer pressure clutch (CL5) has stared engagement. • C2155: The 1st transfer pressure sensor (PS39) is blocked after the lamps of given time after the 1st transfer pressure clutch (CL5) turned OFF when the release operation is finished. • C2156: The 1st transfer pressure sensor (PS39) is unblocked after the laps of given time after the 1st transfer pressure clutch (CL5) turned OFF when the pressing operation is finished.
• Causes: • Fusing motor (M3) • 1st transfer pressure clutch (CL5) • 1st transfer pressure sensor (PS39) • MFP board (MFPB)
• Remedy: 1. Check the connector between M3-MFPB CN8E for proper connection and correct as necessary. 2. Check the connector of M3 for proper drive coupling and correct as necessary. 3. Check the connector between PS39-relay CN113-MFPB CN15EB for proper connection and correct as necessary. 4. Check the connector between CL5-relay CN118-MFPB CN15EA for proper connection and correct as necessary. 5. PS39 I/O check, sensor check • Control signal: MFPB CN15EB-17 (ON) • Location of electrical component: 10-C 6. CL5 operation check • Control signal: MFPB CN15EA-18 (ON) • Location of electrical component: 8-C 7. M3 operation check • Control signal: MFPB CN8E-9 (REM), MFPB CN8E-12 (LOCK) • Location of electrical component: 2-C 8. Replace M3. 9. MFPB ICP2E conduction check 10. Replace MFPB.

• Code: C2253, C2254
• Description: • C2253: PC motor failure to turn • C2254: PC motor turning at abnormal timing. C2253: The motor lock signal remains HIGH for a predetermined continuous period of time while the motor is turning. C2254: The motor lock signal remains LOW for a predetermined continuous period of time while the motor remains stationary.
• Causes: • PC motor (M2) • MFP board (MFPB)
• Remedy: 1. Check the connector between M2-MFPB CN7E for proper connection and correct as necessary. 2. Check the connector of M2 for proper drive coupling and correct as necessary. 3. M2 operation check • Control signal: MFPB CN7E-13 (REM), MFPB CN7E-16 (LOCK) • Location of electrical component: 3 to 4-C 4. Replace M2. 5. Replace MFPB.

• Code: C2255, C2256
• Description: • C2255: Developing motor failure to turn • C2256: Developing motor turning at abnormal timing. • C2255: The motor lock signal remains HIGH for a predetermined continuous period of time while the motor is turning. • C2256: The motor lock signal remains LOW for a predetermined continuous period of time while the motor remains stationary.
• Causes: • Developing motor (M21) • MFP board (MFPB)
• Remedy: 1. Check the connector between M21-MFPB CN7E for proper connection and correct as necessary. 2. Check the connector of M21 for proper drive coupling and correct as necessary. 3. M21 operation check • Control signal: MFPB CN7E-5 (REM), MFPB CN7E-8 (LOCK) • Location of electrical component: 3-C 4. Replace M21. 5. Replace MFPB.

• Code: C2355
• Description: Transfer belt cleaner cooling fan failure to turn. The fan lock signal remains HIGH for a predetermined continuous period of time while the fan is turning.
• Causes: • Transfer belt cleaner cooling fan (FM2) • MFP board (MFPB)
• Remedy: 1. Check the connector between FM2-relay CN115-relay CN141-MFPB CN15EB for proper connection and correct as necessary. 2. Check the fan for possible overload and correct as necessary. 3. FM2 operation check • Control signal: MFPB CN15EB-3 (REM), MFPB CN15EB-5 (LOCK) • Location of electrical component: 9-C 4. Replace FM2. 5. Replace MFPB.

• Code: C2411, C2412
• Description: • C2411: Developing unit/C new article release • C2412: Developing unit/M new article release. The status with the new unit is not cleared after the new developing unit is set.
• Causes: • Developing unit • Front side board (FRB) • MFP board (MFPB)
• Remedy: 1. Reinstall developing unit. 2. Check the connector between the developing unit-FRB CN13 (C2414), CN14 (C2411), CN15 (C2412), CN16 (C2413) for proper connection and correct as necessary. 3. Check the connector between FRB CN1, CN3-MFPB CN4E, CN11E for proper connection and correct as necessary. 4. Replace the developing unit. 5. Replace FRB. 6. Replace MFPB.

• Code: C2413, C2414
• Description: • C2413: Developing unit/Y new article release • C2414: Developing unit/K new article release. The status with the new unit is not cleared after the new developing unit is set
• Causes: • Developing unit • Front side board (FRB) • MFP board (MFPB)
• Remedy: 1. Reinstall developing unit. 2. Check the connector between the developing unit-FRB CN13 (C2414), CN14 (C2411), CN15 (C2412), CN16 (C2413) for proper connection and correct as necessary. 3. Check the connector between FRB CN1, CN3-MFPB CN4E, CN11E for proper connection and correct as necessary. 4. Replace the developing unit. 5. Replace FRB. 6. Replace MFPB.

• Code: C2551, C2553, C2555
• Description: • C2551: Abnormally low toner density detected cyan TCR sensor • C2553: Abnormally low toner density detected magenta TCR sensor • C2555: Abnormally low toner density detected yellow TCR sensor. When sampling data is determined in TC ratio calculation control, TCR sensor output is higher than a predetermined value for a predetermined number of times in a row even though there is toner in the sub hopper.
• Causes: • Developing unit/C,M,Y • Toner cartridge/C,M,Y • Toner empty sensor/Y (PS34) • Toner empty sensor/M (PS33) • Toner empty sensor/C (PS32) • Toner cartridge motor/Y,M,C (M10) • Toner supply motor/Y (M9) • Toner supply motor/M (M8) • Toner supply motor/C (M7) • Front side board (FRB) • MFP board (MFPB)
• Remedy: 1. Perform image troubleshooting procedure if image density is low. 2. Reinstall developing unit. 3. Reinstall toner cartridge. 4. Check the connector between the developing unit-FRB CN14 (C2551), CN15 (C2553), CN16 (C2555) for proper connection and correct as necessary. 5. Check the connector between FRB CN1, CN3-MFPB CN4E, CN11E for proper connection and correct as necessary. 6. M10 operation check • Control signal: MFPB CN16E-1 to 4 • Location of electrical component: 15-C 7. M7, M8, M9 operation check • Control signal: MFPB CN16E-5 to 8 (M7), MFPB CN16E-9 to 12 (M8), MFPB CN16E-13 to 16 (M9) • Location of electrical component: 15-C (M7, M8), 16-C (M9) 8. If the toner empty sensor and its surroundings inside the sub hopper are dirtied with toner, clean them. 9. Replace the developing unit. 10. Replace FRB. 11. Replace MFPB.

• Code: C2552, C2554
• Description: • C2552: Abnormally high toner density detected cyan TCR sensor • C2554: Abnormally high toner density detected magenta TCR sensor.
• Causes: The TC ratio of the toner determined by the toner replenishment control is detected to be the predetermined value or over for consecutive times.
• Remedy: • Developing unit/C,M,Y,K • Toner cartridge/C,M,Y,K • Front side board (FRB) • MFP board (MFPB)