Cannot Connect To The Network - Denon DRA-800H Service Manual

4. Network / Bluetooth / USB

4.1. Cannot connect to the network

Check the connection environment
Is the LAN cable correctly inserted?
YES
Check the setting
Are the network settings of this unit correct?
YES
Are peripheral devices such as the router and hub
connected to this unit correctly?
YES
Are the router settings correct?
YES
Checking the unit
Can the voltage (5.2V) be confirmed between
[CN741 : 1pin]?
YES
NO
Insert the LAN cable correctly and then turn on
the power again.
NO
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.
NO
Connect the peripheral devices correctly.
NO
Check the instruction manual of the router and
configure the settings correctly.
Check that there are no connection restrictions by
MAC addresses, etc.
NO
TO "5. SMPS"
NO
Can the LEGO5V output voltage
Is NET5V_POWER [IC751 : 52pin
(5V) to [Q7402 : FET-SW] be
uCOM] "Hi" ?
confirmed?
YES
NO
Can the D3.3V output voltage
Is MAIN_POWER [IC741 : 5pin]
(3.3V) to [IC741 : DC-DC Conv.]
"Hi" ?
be confirmed?
YES
NO
Can the NET3.3V output voltage
Is NET3V3_POWER [IC751 :
(3.3V) to [Q7404 : FET-SW] be
111pin uCOM] "Hi" ?
confirmed?
YES
Are the versions of the HEOS Version displayed in
Version Check Mode?
YES
The circuit of Network Module is faulty.
68
NO
The circuit of NET5V_POWER
between [IC751-Q7402] are
faulty.
YES
The circuit around [Q7402 :
FET-SW] is faulty.
NO
Check D5.2V between [CN741-
IC741].
YES
The circuit around [IC741 : DC-
DC.Conv.] is faulty.
NO
The circuit of NET3V3_POWER
between [IC751-Q7404] are
faulty.
YES
The circuit around [Q7404 :
FET-SW] is faulty.
NO
The Network Module software is faulty.