Network/Bluetooth/Usb - Denon AVR-X1200W Service Manual

5. Network/Bluetooth/USB

5.1. Cannot connect to the network
Is the LAN cable correctly inserted?
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?
Can the voltage (5V) be confirmed on pin 1 of CN741?
Can the D3.3V output voltage (3.3 V) to
IC741 (DC-DC Conv.) be confirmed?
Check the connection environment
YES
Check the connection environment
YES
YES
YES
YES
Checking the unit
YES
NO
Is MAIN_POWER (IC751 127 pin) "Hi" ?
YES
NO
Insert the LAN cable correctly and then turn on the
power again.
Set the IP address, etc. correctly.
NO 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.
Check the instruction manual of the router and config-
NO
ure the settings correctly.
Check that there are no connection restrictions by MAC
addresses, etc.
NO
The circuit between the AC inlet and CN741 is faulty.
Check the SMPS PCB.
NO
YES
81
The circuit of MAIN_POWER between
IC751 and IC741 are faulty.
The circuit around IC741(DC-DC.Conv.)
is faulty.