• Code: CD272
• Description: i-Option activated and additional memory and HDD not installed. While the i-Option is activated, the additional memory (DIMM) included in UK-211 and the HDD are not installed.
• Causes: • MFP board (MFPB) • Hard disk (HDD) • DIMM (DIMM: UK-211)
• Remedy: 1. Check DIMM for proper connection and correct as necessary. 2. Access [Service Mode] -> [System 2] -> [HDD] and check to see if “Installed” is selected. 3. Replace the DIMM. 4. Replace the hard disk. 5. Replace MFPB.

• Code: CD390
• Description: Nonvolatile data checksum error. C-D390 code is normally shown when the MFP board is replaced with a new one.
• Causes:
• Remedy: 1. Wait until “Recover Data” appears. (MFP will reboot maximum 2 times by itself, it may take 5 minutes.) Touch the “Recover Data” button and follow the instructions that appear on the control panel to restore (backup) data.

• Code: CD391
• Description: Nonvolatile data save error (eMMC)
• Causes:
• Remedy: NOTE • Contact the responsible people of KM before taking some countermeasures.

• Code: CD392
• Description: Nonvolatile data save error (EEPROM) The EEPROM is replaced with a new one.
• Causes: • EEPROM/1 • EEPROM/2
• Remedy: 1. Replace the following components with new ones. When the transfer belt unit and the fusing unit have been replaced with new ones, perform [New Release] in the service mode. When the transfer roller has been replaced with a new one, perform [Counter clear]. • Imaging unit/Y,M,C • Developing unit/K • Drum unit/K • Toner cartridge/Y,M,C,K • Transfer belt unit • Fusing unit • Transfer roller • Feed roller, pick-up roller, separation roller (including options) 2. Turn OFF the main power switch, disconnect and then connect the power cord. Wait for 10 sec. or more after connect the power cord, and turn ON the main power switch. 3. Set the various setting values in the service mode again. NOTICE • Link to the layout drawings for related parts by each trouble code (S.85. CD392)

• Code: CD3A0
• Description: Counter error. The total counter values provided by the MFP board and the eMMC board are different.
• Causes: • MFP board (MFPB) • eMMC board (eMMC)
• Remedy: 1. If this error occurs temporarily due to the use of the board removed from another machine, reinstall the original board. 2. Replace the current MFPB with a new one. 3. Replace the current eMMC with a new one.

• Code: CD401, CD402, CD403
• Description: • CD401: NACK command incorrect • CD402: ACK command incorrect • CD403: Checksum error. When abnormality is found in the communication of controller.
• Causes: MFP board (MFPB)
• Remedy: 1. Check whether there is a strong electromagnetic noise source near the main body. 2. Check the connectors on MFPB for proper connection and correct as necessary. 3. Replace MFPB.

• Code: CD404, CD405, CD406
• Description: • CD404: Receiving packet incorrect • CD405: Receiving packet analysis error • CD406: ACK receiving timeout
• Causes: MFP board (MFPB)
• Remedy: 1. Check whether there is a strong electromagnetic noise source near the main body. 2. Check the connectors on MFPB for proper connection and correct as necessary. 3. Replace MFPB.

• Code: CD407, CD411
• Description: • CD407: Retransmission timeout • CD411: Touch panel board error
• Causes: MFP board (MFPB)
• Remedy: 1. Check whether there is a strong electromagnetic noise source near the main body. 2. Check the connectors on MFPB for proper connection and correct as necessary. 3. Replace MFPB.