TROUBLESHOOTING

Question

Answer

Page

 

 

 

 

You may be logging in as a non-admin user or using fast user

 

Why does the installation of the

switching.

 

You need to log in as an administrator to install or configure

–

driver software hang?

the driver software. Also, fast user switching is not supported.

 

 

If you are logging in as a non-admin user or using fast user

 

 

switching, log off and log in again as an administrator.

 

 

 

 

 

There may be a network device with the same IP address as

 

 

the machine on the network, and the device that replied to

 

 

ping may not be the machine. (Try "arp -a" command after

 

 

executing ping command.)

 

 

Check the IP address of each device on the network, then

 

 

assign an IP address on the machine.

 

 

• Example: In the list displayed after executing "arp -a"

–

 

command, if the Ethernet address (Physical address) shown

 

 

The machine replies to ping,

on the right side of the IP address (Internet address) is

 

however it can not be seen on the

different from the machine's Ethernet address, another

 

network device with the same IP address replied.

 

network.

 

• Example: If a device replied to ping even the LAN cable is

 

 

 

 

disconnected from the machine, the device has the same IP

 

 

address.

 

 

 

 

 

Security software such as firewall may exclude the

 

 

communication to the machine.

 

 

Disable the security software such as firewall and verify again.

–

 

For information on disabling the function of the security

 

 

software, refer to the manual or online help of the software.

 

 

 

 

 

In the environment the machine is operating, there may be a

 

 

router or a server (DHCP server) with the function to assign

 

 

an IP address. Check the DHCP server and try one of the

 

 

following.

 

 

• Verify the range of the IP address the DHCP server assigns,

 

 

and assign a unique IP address that is out of the range. The

 

 

IP address has to be in the same segment. The

 

 

DHCP/BOOTP/RARP protocol of the machine needs to be

 

Why does the IP address change

disabled.

 

Example: If the range of the IP address the DHCP server

–

every time I turn on the machine?

assigns is from 192.168.0.2 to 192.168.0.32, assign an IP

 

 

address which has not been used in the network from the

 

 

range between 192.168.0.33 and 192.168.0.254. When you

 

 

assign an IP address, make sure that the same IP address

 

 

has not been assigned on multiple devices. The DHCP

 

 

server itself may have the IP address such as 192.168.0.1

 

 

or 192.168.0.254. Please verify.

 

 

• Register the machine on DHCP server in order to assign a

 

 

fixed IP address. (Refer to your DHCP server manual for

 

 

how to configure.)

 

 

 

 

The network settings of the

The configuration of the machine may not have been

 

completed properly. Typically the setup information is not

 

machine are initialised to the

properly registered if you canceled the setup while transferring

Start

factory default every time the

the configuration data to the machine, and if you experienced

Guide

machine is booted.

a network stoppage problem during the setup.

 

 

Please retry the setup procedure again.

 

 

 

 

Why can't I search the device (the

You need to add SC-Scan A and UDP port number "19540" to

 

the firewall exception list. For information on adding SC-Scan

 

scanner function) using SC-Scan

A and UDP port number "19540" to the firewall exception list,

–

A?

refer to the manual or online help of your operating system or

 

 

firewall software.

 

 

 

 

88

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Sharp AR-5516N, AR-5520N Machine replies to ping, However it can not be seen on, Network, Why does the IP address change
Page 89 Page 91

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