• Code: 393.424
• Description: C Toner Cartridge Near Empty. It was detected that the replacement timing for Toner Cartridge (C) is closer than Pre Near.
• Remedy: The Toner Cartridge (C) needs to be replaced soon. Replace the Toner Cartridge (C) as required.

• Code: 393.425
• Description: K Toner Cartridge Near Empty. It was detected that the replacement timing for Toner Cartridge (K) is closer than Pre Near.
• Remedy: The Toner Cartridge (K) needs to be replaced soon. Replace the Toner Cartridge (K) as required.

• Code: 393.912
• Description: K Toner Cartridge Empty. The K Toner Cartridge Empty state was detected.
• Remedy: Replace the Toner Cartridge (K). No special action necessary.

• Code: 393.916
• Description: Toner K CRUM Not In Position. The Toner CRUM (K) is not in the proper position.
• Remedy: 1. Remove and reinstall the Toner Cartridge (K). 2. Polish the connection terminals between the Toner Cartridge (K) CRUM PWB and the Toner CRUM Coupler Assembly (K) CRUM with dry cloth. (When cleaning, do not use Drum cleaner, etc.) 3. Check the following: • The connection between the MCU PWB P/J411 and the Toner CRUM Coupler Assembly (K) P/J123 for open circuit, short circuit, and poor contact • The connection terminals between the Toner Cartridge (K) CRUM PWB and the Toner CRUM Coupler Assembly (K) CRUM for damage and foreign substances • The Toner Cartridge (K) for improper installation If no problems are found, replace the following parts in sequence: • Toner Cartridge (K) • Toner CRUM Coupler Assembly (K) (PL 5.1) • MCU PWB • Go to 393.926 Toner K CRUM Data Mismatch Fault.

• Code: 393.924
• Description: Toner K CRUM Communication Fault. Communication failure with Toner CRUM (K) was detected.
• Remedy: 1. Turn the power Off and On. 2. Check the connection between the MCU PWB P/J411 and the Toner CRUM Coupler Assembly (K) P/J123 for open circuit, short circuit, and poor contact. Also, remove and reinstall the Toner Cartridge (K) and check for improper installation. If no problems are found, replace the following parts in sequence: • Toner Cartridge (K) • Toner CRUM Coupler Assembly (K) (PL 5.1) • MCU PWB • Go to 393.926 Toner K CRUM Data Mismatch Fault

• Code: 393.925
• Description: Toner K CRUM Data Broken Fault. The system detected that the data written to the Toner CRUM (K) and the data read from the Toner CRUM (K) do not match.
• Remedy: An Error Message appears on the UI - Reinsert an improperly seated consumable or replace any consumables with Error. Press Machine Status button and select Supplies tab for details. Remove and reinstall the Black Toner Cartridge and check for improper installation. The problem continues Y↓ N→End Check the NVM locations
  740-053 Geographic Setting 3 = North America/Europe 12 = DMO 15 = Worldwide 740-055 Contract Type 2 = Sold 3 = Metered 31 = Neutral
  The NVM values match the expected customer configuration. Y↓ N→Determine correct Contract Type from customer. Contact Technical Support Center or your NTS for the CRUM conversion procedure. 1. Polish the connection terminals between the Toner Cartridge (K) CRUM PWB and the Toner CRUM Coupler Assembly (K) CRUM with dry cloth. (When cleaning, do not use Drum cleaner, etc.) 2. Check the following: • The connection between the MCU PWB P/J411 and the Toner CRUM Coupler Assembly (K) P/J123 for open circuit, short circuit, and poor contact • The connection terminals between the Toner Cartridge (K) CRUM PWB and the Toner CRUM Coupler Assembly (K) CRUM for damage and foreign substances • The Toner Cartridge (K) for improper installation If no problems are found, replace the following parts in sequence: • Toner Cartridge (M) • Toner CRUM Coupler Assembly (M) (PL 5.1) • MCU PWB

• Code: 393.926
• Description: Toner K CRUM Data Mismatch Fault. Incorrect authentication area data was detected in the Black Toner CRUM. This fault is displayed if different type of Toner cartridge is installed than what the printer is currently set to accept. The types of toner are: NA/XE, DMO, FX and Metered.
• Remedy: An Error Message appears on the UI - Reinsert an improperly seated consumable or replace any consumables with Error. Press Machine Status button and select Supplies tab for details. Remove and reinstall the Black Toner Cartridge and check for improper installation. The problem continues Y↓ N→End Contact second level support to obtain a secure snippet to reset the printer to the neutral configuration. You will need the printer's serial number and current print count. The snippet will be effective if installed within 500 prints of the current print count. After sending the snippet, the next toner cartridge installed will set the region code so make sure that the cartridge installed is the correct one for the region. Is the issue still present after sending the secure snippet? Y↓ N→End. 1. Polish the connection terminals between the Toner Cartridge (K) CRUM PWB and the Toner CRUM Coupler Assembly (K) CRUM with dry cloth. (When cleaning, do not use Drum cleaner, etc.) 2. Check the following: • The connection between the MCU PWB P/J411 and the Toner CRUM Coupler Assembly (K) P/J123 for open circuit, short circuit, and poor contact • The connection terminals between the Toner Cartridge (K) CRUM PWB and the Toner CRUM Coupler Assembly (K) CRUM for damage and foreign substances • The Toner Cartridge (K) for improper installation If no problems are found, replace the following parts in sequence: • Toner Cartridge (M) • Toner CRUM Coupler Assembly (M) (PL 5.1)

• Code: 393.927
• Description: Toner Y CRUM Communication Fault. Communication failure with Toner CRUM (Y) was detected.
• Remedy: 1. Turn the power Off and On. 2. Check the connection between the MCU PWB P/J411 and the Toner CRUM Coupler Assembly (Y) P/J120 for open circuit, short circuit, and poor contact. Also, remove and reinstall the Toner Cartridge (Y) and check for improper installation. If no problems are found, replace the following parts in sequence: • Toner Cartridge (Y) • Toner CRUM Coupler Assembly (Y) (PL 5.1) • MCU PWB • Go to 393.960 Toner Y CRUM Data Mismatch Fault