• Code: E737
• Description: A main memory error occurs.
  • Writing to the main memory fails at power-on.
• Remedy: DIMM (controller) 1) Is the DIMM in the controller fitted to the socket firmly? NO: Fit it firmly. 2) Try replacing the DIMM in the controller. Is the problem corrected? YES: Replace the DIMM. NO: Replace the system controller PCB.

• Code: E738
• Description: A network interface initialization error occurs.
  • Initialization of the network PCB fails at power-on.
• Remedy: Connection (poor contact) 1) Is the network PCB connected to the relay PCB securely? NO: Connect it securely. Relay PCB 2) Is connector J301 of the relay PCB connected to connector J1017 of the system controller PCB securely? NO: Connect the connector securely. Network PCB 3) Try replacing the network PCB. Is the problem corrected? YES: End. Relay PCB, System controller PCB 4) Try replacing the relay PCB. Is the problem corrected? YES: End. NO: Replace the system controller PCB.

• Code: E739
• Description: A network interface communication error occurs.
  • The communication with the network PCB fails at power-on.
• Remedy:

• Code: E741
• Description: A network PCI error occurs.
  • The network PCB cannot be recognized at power-on
• Remedy: Connection (poor contact) 1) Is the network PCB connected to the relay PCB securely? NO: Connect it securely. Relay PCB 2) Is connector J301 of the relay PCB connected to connector J1017 of the system controller PCB securely? NO: Connect the connector securely. Network PCB 3) Try replacing the network PCB. Is the problem corrected? YES: End. Relay PCB, System controller PCB 4) Try replacing the relay PCB. Is the problem corrected? YES: End. NO: Replace the system controller PCB.

• Code: E804
• Description: A printer power supply cooling fan error occurs.
  • An error occurs in the rotation of the printer power supply cooling fan (FAN2)
• Remedy: Connector (poor contact) 1) Is connector J216 on the DC controller PCB connected securely? NO: Connect it securely. Printer unit power supply cooling fan (FM2) 2) Disconnect J210 of the DC controller PCB. Does the voltage between connectors J216-1 (FAN2D) and J2163 (GND) of the DC controller PCB change from 0 to about 18 V immediately after the power switch is turned on? YES: Replace the printer unit power supply cooling fan. NO: Replace the DC controller PCB.

• Code: E805
• Description: A fixing assembly/scanner fan error occurs.
  • An error occurs in the rotation of the fixing assembly fan (FAN4)
• Remedy: Connector (poor contact) 1) Are connector J225 on the DC controller PCB and relay connectors J25 and J26 connected securely? NO: Connect the connectors securely. Fixing assembly fan (FAN4) 2) Disconnect J225 from the DC controller PCB. Does the voltage between connectors J225-1 (FAN4D) and J225-03 (GND) on the DC controller PCB change from 0 to about 18 V immediately after the power switch is turned on? YES: Replace the fixing assembly fan (FM4). NO: Replace the DC controller PCB.

• Code: E807
• Description: A fixing assembly/scanner fan error occurs.
  • An error occurs in the rotation of the fixing assembly/scanner fan (FAN1).
• Remedy: Connector (poor contact) 1) Is connector J208 on the DC controller PCB connected securely? NO: Connect the connector securely. Fixing/scanning fan (FAN1) 2) Disconnect J208 of the DC controller PCB. Does the voltage between connectors J208-1 (FAN1D) and J208-3 (GND) change from 0 to about 18 V immediately after the power switch is turned on? YES: Replace the fixing/scanner fan (FM1). NO: Replace the DC controller PCB.

• Code: E826
• Description: A multifeeder cooling fan error occurs.
  • An error occurs in the rotation of the multifeeder tray fan (FAN5).
• Remedy: Connector (poor contact) 1) Are connector J229 on the DC controller PCB and relay connectors J34 and J35 connected securely? NO: Connect the connectors securely. Multifeeder tray fan (FM5) 2) Disconnect J229 from the DC controller PCB. Does the voltage between connectors J229-1 (FAN5D) and J229-3 (GND) on the DC controller PCB change from 0 to bout 18 V immediately after the power switch is turned on? YES: Replace the multifeeder tray fan (FM5). NO: Replace the DC controller PCB.