Canon DU7-1178-000, Service Manual, Page: 78 / 122

Chapter 4
4-1
4.1 Notes when service
4.1.1 Points to Note
0008-4678
If it becomes necessary to perform memory clear (MMI CLEAR) during service, then in order to save the
user's network settings and address settings, etc., always make sure that you print out the user data list (net-
work) and address lists, etc., from user mode. And, before printing out any address lists, make sure that
you explain the need for this to the user and obtain the user's consent. Further, if it is possible to use a
remote UI, exporting and backing up address lists, transfer setting and other user mode contents will assist
in recovery in the event of any problems. For a user who uses two or more imageRUNNERs/iRs, use of
the device information delivery, new feature, will be a good solution.
4.2 Troubleshooting
4.2.1 Troubleshooting
0008-4679
<Troubleshooting procedures>
Basic troubleshooting procedures related to the SEND function are described below.
Where an error message or error code is displayed, refer to the appended error list and check the appropri-
ate countermeasure. The error list is divided by function, as per the following.
E-mail transmission/ I-Fax transmission/ I-Fax reception/ transmission/FTP transmission/NCP transmis-
sion.
When a problem occurs, the first step is to identify with which function the problem occurred and then
check the error list for the appropriate countermeasure.
If the location of the problem cannot be identified form the error message or the error code, the following
information may be of help in determining whether the cause is in the network, server or iR.
<Network causes>
Check the following items.
- Use the Ping command to check whether the appropriate IP address (an address that can be used to check
whether the DNS server, SMTP server, POP server, etc, are operating properly) responds.
- If there is a response, move on to check whether the cause is in the server. If there is no response, check
the network cable connection, the network board status and the network hub status. If a PC can be used,
take the cable that is connected to the iR and connect it to the PC and try connecting to the network from
the PC. If connection fails, it may be assumed that there is a problem on the network side.
- With SMB transmission, it is sometimes the case that transmission on the PC to the network is possible
but reference is not. In that case, it is necessary to gather information about the user's operating environ-
ment. The following is an example of the user's operating environment and possible cause and counter-
measure, when it is not possible to reference.
Reference information:
Operating environment when SMB browsing (reference) is not possible
When transmitting files with SMB with the following operating environment, it is sometimes the case that
the addressee's browsing (reference) function does not work well.
- Around 50 PCs (Windows XP/Windows 2000/Windows 98/Mac OS) all obtain IP addresses via DHCP.
There is no domain controller or other server and the network is made up of 10 work groups.
Problems likely to occur with this kind of set up include, with regard to SMB browsing (reference) from
iR,
- even if referencing is performed, there is absolutely no display,
- the function extends as far as the work groups, but some work groups are excluded.
How this problem is caused
The Windows network automatically assigns one machine in each work group as the master browser.
However, in the above environment (each PC gets its IP address from DHCP and there is no server) the
assignation of the master browser may become unstable. The IP addresses obtained from DHCP some-
times change and there are periods where the master browser cannot be assigned because PCs are being
switched off and on, so the information being held by the master browsers gets mixed up, leading to the
problems described above. In this environment, even if a WINS server is programmed, in work group
browsing there is no query made to the WINS server. This is because the WINS server does not return