Troubleshooting - Canon imageRUNNER 1750 Series Service Manual

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Technical Explanation > Embedded RDS > Troubleshooting

Troubleshooting

No.1
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 the main unit is connected ON?
YES: Proceed to Step 2).
NO: Check that the network cable is properly connected.
2) Confirm loop back address
Select [Additional Functions (User Mode)] > [System Settings] > [Network Settings] > [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 the main unit'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 the main unit from a PC connected to same network.
Does the main unit respond?
YES: Proceed to Step 4).
NO: Confirm the details of the main unit's IP address and subnet mask settings.
2 Technical Explanation > Embedded RDS > Troubleshooting
4) Confirm DNS connection
F-2-120
(a) Select [Additional Functions (User Mode)] > [System Settings] > [Network Settings] >
[TCP/IP Settings] > [IPv4 Settings] > [DNS Settings] > [DNS Server Address Settings],
write down the primary and secondary addresses of the DNS server.
(b) Press Reset key.
(c) Select [Additional Functions (User Mode)] > [System Settings] > [Network Settings] >
[TCP/IP Settings] > [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: Enter the secondary DNS server noted down in step a) as the IP address,
and then touch Start.
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.
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