Troubleshooting Network Faults - Canon iR8500 Service Manual

2.15 Troubleshooting Network Faults

If a connection to the network cannot be made, you may suspect the following faults; go
through the steps that follow to correct the fault:
a. The connection between the network and the network PCB is poor.
b. The machine's TCP/IP settings are wrong.
c. The network PCB is faulty, or it is not mounted correctly.
d. The user's network is faulty.
No.
1 Checking the Connection of the Network Cable
1) Check to make sure the network cable is correctly connected to the network PCB:
• If the connection is normal, go to step 2).
• If the connection is poor, correct it; then, make a check once again using the remote host
address.
2 Making a Check Using a Loop-Back Address
A loop-back address is returned before it reaches the network PCB; as such, executing the
PING function using it will enable you to check the TCP/IP settings of the machine.
1) Enter the loop-back address (127.0.0.1) in the PING field.
• If 'NG' is indicated, check the TCP/IP settings of the machine once again, and execute the
PING function once again.
• If 'OK' is indicated, go to step 3).
3 Making a Check Using a Local Host Address
The local host address is the IP address of the machine; as such, when the PING function is
executed, the address will be returned after it has reached the network PCB, enabling you to
find out if the network PCB is free of faults.
1) Enter the IP address of the machine in the PING field.
• If 'NG' is indicated, go through the following checks and actions, and execute the PING
function once again.
a. The IP address of the machine may be wrong. Check the IP address setting of the machine
once again, and check with the system administrator to find out if the assigned IP address
is effective.
b. The network PCB may have poor connection. Check the connector of the network PCB for
connection.
c. The network PCB may be faulty. Replace the network PCB.
• If 'OK' is indicated, suspect a fault in the user's network environment. Report to the
system administrator for correction.
COPYRIGHT© 2001 CANON INC.
Work
2000 2000 2000 2000 CANON iR8500/7200 REV.1 AUG. 2001
CHAPTER 4 INSTALLATION
Checks/remarks
4-33