Cannot Connect To Network For A Wired Lan - Denon HEOS 7 HS2 Service Manual

OK
Check input of DIGITAL AMP for Woofer.
INPUT : U8- 25pin AMP_RESET1 "Hi" level OK?
U8- 19pin AMP_PDN1 "Hi" level OK?
U8- 20pin AIOS_LRCLK
U8- 21pin AIOS_SCLK
U8- 22pin DSP_I2S_D0
U8- 15pin AIOS_MCLK 11.289MHz OK?
OK
Check input of DIGITAL AMP for Tweeter.
INPUT : U6- 1pin OUT_A square signal output OK?
U6- 46pin OUT_B square signal output OK?
U6- 39pin OUT_C square signal output OK?
U6- 36pin OUT_D square signal output OK?
OK
Check input of DIGITAL AMP for Woofer.
INPUT : U8- 1pin OUT_A square signal output OK?
U8- 46pin OUT_B square signal output OK?
U8- 39pin OUT_C square signal output OK?
U8- 36pin OUT_D square signal output OK?
OK
Check the soldering of rounding parts or Speaker UNIT flaw.

4. Cannot connect to network For a wired LAN

Is the LAN cable properly connected ?
YES
Are the this unit network settings correct ?
YES
Are the router, hub and other peripherals properly connected ?
YES
Are the router's settings correct ?
YES
Connect a speaker with a router based on "QUICK SETUP
GUIDE".
NG
Check the soldering of rounding parts or U1 DSP IC flaw.
NG
Check the soldering of rounding parts or U6 DIGITAL AMP IC
flaw.
NG
Check the soldering of rounding parts or U8 DIGITAL AMP IC
flaw.
Check the LAN cable properly then turn the power back on.
NO
Set the IP address and other parameters properly.
For a fixed IP setting, check whether the IP address is redun-
NO
dant with that of other devices, and check whether the subnet
mask setting is correct.
Connect properly to peripherals.
NO
Check the router's operating instructions and set properly.
NO Check whether there are connection restrictions due to the
MAC address, etc.
Check the Core Module flaw.
NO
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