Troubleshooting - Canon MF720 Series Service Manual

Q: After the setting for E-RDS was made, the IP address of the host machine was changed. In that case,
is it necessary to execute COM-TEST again?
Ans.
It is not necessary to execute COM-TEST again because the IP address used by E-RDS is automatically changed. However,
it is necessary to turn OFF and then ON the main power of this machine to reflect the change in the setting of the IP address.

Troubleshooting

Symptom: A communication test (COM-TEST) results NG.
Cause:
Initial settings or network conditions is incomplete.
Remedy 1:
Check and take actions mentioned below.
1. Check network connections
Is the status indicator LED for the HUB port to which this machine is connected ON?
YES: Proceed to Step 2.
NO: Check that the network cable is properly connected.
2. Confirm loop back address (* In case of IPv4 )
Select [Settings/Registration] > [Preferences] > [Network] > [TCP/IP Settings] > [IPv4 Settings] > [PING Command],
enter "127.0.0.1", and touch the [Start] button.
Does the screen display "Response from the host."?
YES: Proceed to Step 3.
NO: There is a possibility that this machine's network settings are wrong. Check the details of the IPv4 settings once
more.
3. Confirmation from another PC connected to same network.
Request the user to ping this machine from a PC connected to same network. Does this machine respond?
YES: Proceed to Step 4.
NO: Confirm the details of this machine's IP address and subnet mask settings.
4. Confirm DNS connection
(a) Select [Settings/Registration] > [Preferences] > [Network] > [TCP/IP Settings] > [DNS Settings] > [DNS Server
Address Settings], write down the primary and secondary addresses of the DNS server, and touch the [Cancel] button.
(b) Touch the [Up] button.
(c) [Select IPv4 Settings] > [PING Command], enter the primary DNS server noted down in step (a) as the IP address,
and touch the [Start] button.
Does the screen display "Response from the host."?
YES: Proceed to Remedy 2.
NO: Proceed to step (d).
(d) Enter the secondary DNS server noted down in step (a) as the IP address, and then touch the [Start] button.
Does the screen display "Response from the host."?
YES: Proceed to Remedy 2.
NO: There is a possibility that the DNS server address is wrong. Reconfirm the address with the user's system
administrator.
Remedy 2:
Troubleshooting using communication error log (COM-LOG)
1. Start [SERVICE MODE].
2. Select [COPIER] > [FUNCTION] > [MISC-P] > [ERDS-LOG], and press [Yes] to execute report output of the
communication error log information.
3. When a message is displayed, take an appropriate action referring to
Symptom: A communication test results NG even if network setting is set properly.
Cause:
The network environment is inappropriate, or RGW-ADR or RGW-PORT settings for E-RDS have been changed.
Remedy:
The following points should be checked.
1. Check network conditions such as proxy server settings and so on.
"Error code and strings" on page
53
2. Technical Explanation
54.