• Code: E7-A0
• Description: LSU EEPROM/LD driver read/write error (K)
  Write error in write sequence of the serial EEPROM/ LD driver for Black
• Causes: EEPROM/LD driver trouble. EEPROM/LD driver access circuit trouble.
• Remedy: Check connection of the connector and the harness of the LD PWB and the PCU PWB. Replace the PCU PWB. If the above remedies cannot delete the trouble, replace the LSU.

• Code: E7-A5
• Description: Installation error of HDD which was used in the mirroring kit
  When a HDD which was used in the mirroring kit is installed to the MFP without the mirroring kit, its operation is restricted in order to prevent against malfunction.
• Causes: A HDD which was used in the mirroring kit is installed to the MFP without the mirroring kit.
• Remedy: Replace the HDD with one which has not been used in the mirroring kit.

• Code: E7-A7
• Description: mSATA SSD trouble
• Causes: mSATA SSD trouble. Improper connection of mSATA SSD. SCN-MFP PWB trouble. Data error of the file system management part.
• Remedy: Remove and insert the mSATA SSD. Replace the mSATA SSD. Replace the SCN-MFP PWB.

• Code: E7-C0
• Description: TPM PWB access error.
• Causes: The wear protection function of the TPM substrate. TPM PWB trouble. connection trouble, no connection. TPM PWB used in other MFP was loaded.
• Remedy: Turn OFF/ON the power. Check the condition of TPM PWB connection.

• Code: E7-C1
• Description: Security check error. Abnormality is detected by own security function test when starting.
• Causes: TPM PWB trouble. Random number generation program error. Security function and Setting error.
• Remedy: Turn OFF/ON the power. Check the condition of TPM PWB connection.

• Code: EE-EC
• Description: Automatic toner density adjustment error
  The sampling level in the automatic toner density adjustment is outside of 120+-5.
• Causes: Toner density sensor trouble. Developing unit trouble. PCU PWB trouble.
• Remedy: Replace the toner density sensor. Replace the developing unit. Replace the PCU PWB.

• Code: EE-EL
• Description: Automatic toner density adjustment error (Over toner)
  When in the automatic toner density adjustment, the sample level is less than 67 or the control voltage value exceeds 197.
• Causes: Toner density sensor trouble. Developing unit trouble. PCU PWB trouble.
• Remedy: Replace the toner density sensor. Replace the developing unit. Replace the PCU PWB.

• Code: EE-EU
• Description: Automatic toner density adjustment error (Under toner)
  When in the automatic toner density adjustment, the sample level exceeds 154 or the control voltage value is less than 49.
• Causes: Toner density sensor trouble. Developing unit trouble. PCU PWB trouble.
• Remedy: Replace the toner density sensor. Replace the developing unit. Replace the PCU PWB.