Marantz AV8802/U1B - 5. Network;Bluetooth;USB; 5.1. Cannot connect to the network

Check the connection environment
YES
YES
YES
YES
YES
Are the network settings of this unit correct?
Are peripheral devices such as the router and hub connected cor-
rectly?
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 cong-
ure 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
Is the LAN cable correctly inserted?
Insert the LAN cable correctly and then turn on the
power again.
NO
Check the connection environment
Checking the unit
YES
YES
Can an output voltage (3.3V) to U611
(DC-DC Conv.) be conrmed?
Can a voltage (5V) be conrmed between pin 2 and pin 5 of
N6502?
Is D5V_POWER (U5001 uCOM 85pin)
"Hi" ?
The circuit of D5V_POWER between
U5001 and U611 are faulty.
The circuit around U5001 (DC-DC.
Conv.) is faulty.
The circuit between the AC inlet and N6502
is faulty. Check the SMPS PCB.
NO NO
NO
YES
101