5. Network / Bluetooth / USB
Check the setting
Are the network settings of this unit correct?
Are peripheral devices such as the router and hub 
connected to this unit correctly?
Are the router settings correct?
Set the IP address, etc. correctly.
When the static IP address is used, check that no 
other devices have the same IP address and that 
the subnet mask settings are correct.
Connect the peripheral devices correctly.
Check the instruction manual of the router and 
congure the settings correctly.
Check that there are no connection restrictions by 
MAC addresses, etc.
5.1. Cannot connect to the network
Is the LAN cable correctly inserted?
Insert the LAN cable correctly and then turn on 
the power again.
Check the connection environment
Checking the unit
Can the output voltage (5V) to 
[U1080 : FET-SW] be conrmed?
Can the voltage (5V) be conrmed between 
[N1033 : 2-5pin]?
Is NET5V POWER [U1018 : 48pin 
uCOM ] "Hi" ?
The circuit of NET5V POWER 
between [U1018-U1080 : FET-
SW] are faulty.
The circuit around [U1080 : FET-
SW] is faulty.
The circuit between the AC inlet and [N1033] is 
faulty.
Check the SMPS PCB.
Can the output voltage (3.3V) to [U1067 : DC-DC 
Conv.] be conrmed?
Can the output voltage (3.3 V) 
to [U1079 : FET-SW] be con-
rmed?
Is NET3.3V POWER [U1018 : 135 
pin uCOM] "Hi" ?
The circuit of NET3.3V POWER 
between [U1018-U1079] are 
faulty.
The circuit around [U1067 : DC-DC.Conv.] is faulty.
The circuit around [U1079 : FET-
SW] is faulty.
Go to next page.
YES
YES
YES
YES
YES
NO NO
NO
NO
NO
NO
YES
YES
NO
NO
NO
NO
YES
YES
YES
Before Servicing 
This Unit
Electrical Mechanical Repair Information Updating
82