Brother DCP-B7520DW

• Code: D100
• Description: An error occurred while initializing the modem.
• Remedy: 1 Connection failure of the modem flat cable Reconnect the modem flat cable. 2 Modem flat cable failure Replace the modem flat cable. 3 Modem PCB failure Replace the modem PCB ASSY. 4 Main PCB failure Replace the main PCB ASSY.

• Code: D200
• Description: Detected that the modem PCB is not connected.
• Remedy: 1 Connection failure of the modem flat cable Reconnect the modem flat cable. 2 Modem flat cable failure Replace the modem flat cable. 3 Modem PCB failure Replace the modem PCB ASSY. 4 Main PCB failure Replace the main PCB ASSY.

• Code: D800
• Description: An error occurred while initializing the touch panel.
• Remedy: 1 Connection failure of the panel flat cable Reconnect the panel flat cable. 2 Connection failure of the key PCB flat cable Reconnect the key PCB flat cable. 3 Touch panel ASSY failure Replace the touch panel ASSY. 4 Key PCB failure Replace the key PCB ASSY. 5 Panel PCB failure Replace the panel PCB ASSY. 6 Panel ASSY failure Replace the panel ASSY. 7 Main PCB failure Replace the main PCB ASSY.

• Code: E000
• Description: An error occurred in the ROM check sum.
• Remedy: <User Check> • Install the latest main firmware.
  1 Main PCB failure Replace the main PCB ASSY.

• Code: E100
• Description: Program error
• Remedy: <User Check> • Install the latest main firmware.
  1 Main PCB failure Replace the main PCB ASSY.

• Code: E500
• Description: An error occurred during access to the DRAM in the main PCB ASSY.
• Remedy: 1 Main PCB failure Replace the main PCB ASSY.