• Code: C4802
• Description: Main unit backup data miscompare
  The replacement of the printer control board is detected.
• Causes: • Printer control board (PRCB)
• Remedy: 1 1.1. Check that the trouble code C4802 appears and then display service mode. 1.2. Call the Enhanced Security to the screen. 1.3. Touch [Engine Data Backup]. 1.4. Touch [Engine Data Load mode], and press the Start key. 1.5. Select [Yes], and press the Start key again. 1.6. Check that the result OK appears. 1.7. Turn OFF the main power switch and turn it ON again more than 10 seconds after. 2 Update the PRCB firmware. 3 If the above actions do not solve the problem, contact KMBT.

• Code: C5104
• Description: Transfer belt motor's failure to turn
  The motor lock signal remains HIGH for a predetermined continuous period of time while the motor remains stationary.
• Causes: • Transfer belt motor (M1) • Printer control board (PRCB)
• Remedy: 1 Check the connector between M1-PRCB CN21 for proper connection and correct as necessary. 2 Check the transfer belt for proper drive coupling and correct as necessary. 3 M1 operation check PRCB CN21-3 (REM) PRCB CN21-6 (LOCK) 17-K. 4 Replace M1. 5 PRCB ICP7 or ICP18 conduction check. 6 Replace PRCB.

• Code: C5105
• Description: Transfer belt motor's turning at abnormal timing
  The motor lock signal remains LOW for a predetermined continuous period of time while the motor remains stationary
• Causes: • Transfer belt motor (M1) • Printer control board (PRCB)
• Remedy: 1 Check the connector between M1-PRCB CN21 for proper connection and correct as necessary. 2 Check the transfer belt for proper drive coupling and correct as necessary. 3 M1 operation check PRCB CN21-3 (REM) PRCB CN21-6 (LOCK) 17-K. 4 Replace M1. 5 PRCB ICP7 or ICP18 conduction check. 6 Replace PRCB.

• Code: C5304
• Description: IH power supply cooling fan's failure to turn
  The fan lock signal remains HIGH for a predetermined continuous period of time while the fan remains stationary.
• Causes: • IH power supply cooling fan (FM10) • Printer control board (PRCB)
• Remedy: 1 Check the connector between FM10-relay CN293- PRCB CN5 for proper connection and correct as necessary. 2 Check the fan for possible overload and correct as necessary. 3 FM10 operation check PRCB CN5-3 (DRIVE) PRCB CN5-5 (LOCK) 9-K. 4 Replace FM10. 5 PRCB ICP24 conduction check. 6 Replace PRCB.

• Code: C5306
• Description: IH coil cooling fan's failure to turn
  The fan lock signal remains HIGH for a predetermined continuous period of time while the fan remains stationary.
• Causes: • IH coil cooling fan (FM3) • Printer control board (PRCB)
• Remedy: 1 Check the connector between FS3-relay CN324-PRCB CN2 for proper connection and correct as necessary. 2 Check the fan for possible overload and correct as necessary. 3 FM3 operation check PRCB CN2-8 (DRIVE) PRCB CN2-9 (LOCK) 3-K. 4 Replace FM3. 6 Replace PRCB.

• Code: C5351
• Description: DC power supply cooling fan's failure to turn
  The fan lock signal remains HIGH for a predetermined continuous period of time while the fan remains stationary.
• Causes: • DC power supply cooling fan (FM9) • DC power supply (DCPU) • Printer control board (PRCB)
• Remedy: 1 Check the connector between FM9-relay CN333- PRCB CN38 for proper connection and correct as necessary. 2 Check the fan for possible overload and correct as necessary. 3 FM9 operation check PRCB CN38-1 (DRIVE) PRCB CN38-3 (LOCK) 19-K. 4 Replace FM9. 5 PRCB ICP3 conduction check. 6 Replace DCPU. 7 Replace PRCB.

• Code: C5354
• Description: Ozone ventilation fan's failure to turn
  The fan lock signal remains HIGH for a predetermined continuous period of time while the fan remains stationary.
• Causes: • Ozone ventilation fan motor (FM6) • Printer control board (PRCB)
• Remedy: 1 Check the connector between FM6-relay CN322- PRCB CN1 for proper connection and correct as necessary. 2 Check the fan for possible overload and correct as necessary. 3 FM6 operation check PRCB CN1-6 (DRIVE) PRCB CN1-8 (LOCK) 7-K. 4 Replace FM6. 5 Replace PRCB.

• Code: C5355
• Description: Toner bottle cooling fan's failure to turn
  The fan lock signal remains HIGH for a predetermined continuous period of time while the fan remains stationary
• Causes: • Toner bottle cooling fan (FM16) • Printer control board (PRCB)
• Remedy: 1 Check the connector between FM16-relay CN328- PRCB CN2 for proper connection and correct as necessary. 2 Check the fan for possible overload and correct as necessary. 3 FM16 operation check PRCB CN2-1 (DRIVE) PRCB CN2-3 (LOCK) 2-K. 4 Replace FM16. 5 Replace PRCB.