Check the connection environment
YES
YES
YES
YES
Are the network settings of this unit correct?
Are peripheral devices such as the router and hub connected
correctly?
Are the router settings correct?
Set the IP address, etc. correctly.
If the IP settings are xed, 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.
NO
NO
NO
5. Network/Bluetooth/USB
5.1. Cannot connect to the network
YES
Is the LAN cable correctly inserted?
Insert the LAN cable correctly and then turn
on the power again.
NO
Check the connection environment
The circuit around CX870 is faulty.
Checking the unit
YES
YES
YES
YES
Can an output voltage (3.3V) to IC741 be conrmed?
Can an output voltage (1.2V) to IC743 be conrmed?
Are the versions of the Ethernet SBL and IMG displayed in Version
Check Mode?
Can a voltage (5V) be conrmed between pin 1 and pin 5 of CN741?
The circuit around IC741 or the circuit of the
3.3V devices is faulty.
The circuit around IC743 or CX870 is faulty.
The Ethernet software is faulty.
Check the SMPS PCB.
NO
NO
NO
NO
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