Canon iR2200 Service Handbook page 264

CHAPTER 6 SELF DIAGNOSIS
E740
0001 At power-on, the LAN card has a fault.
0002 The MAC address has a fault.
0003 The LAN card cannot be read.
Main cause The LAN card is faulty. The main controller PCB is faulty.
Action
1. Connector
Is the connection between the LAN card and the main controller PCB nor-
mal?
NO:
2. LAN card, Main controller PCB
Try replacing the LAN card. Is the problem corrected?
YES: End.
NO:
E741
0000 The PCI bus has a fault.
Main cause The PCI bus has poor connection. The main controller PCB is faulty.
Action Each PCI slot may be disabled in service mode to prevent the error:
BOARD>PCI1-OFF through PCI3-OFF.
1. Board
Is the connection between the relay board and the main controller PCB nor-
mal?
NO:
2. Relay board, Main Controller PCB
Try replacing the relay board. Is the problem corrected?
YES: End.
NO:
6-32
Correct the connection.
Replace the main controller PCB.
Correct the connection.
Replace the main controller PCB.