Denon HEOS AVR Service Manual page 51

11. No sound from another HEOS speaker
Is there a connection between the router and this
unit?
YES
Are the settings correct in the HEOS app for the mobile device?
YES
Check the input of Volume IC (DIGITAL PCB)
Is the ANALOG signal OK?
[IC480 : 41pin] AUX_IN_R
[IC480 : 42pin] AUX_IN_L
OK
See "Check the input of DIR*3" in item 10
12. No sound from another HEOS speaker
Is there a connection between the router and this
unit?
YES
Are the settings correct in the HEOS app for the mobile device?
YES
Check the input of BUFFER IC (DIGITAL PCB)
Is the SPDIF signal OK?
[IC437 : 2pin]
OK
Check the input of DIR (DIGITAL PCB)
Is the SPDIF signal OK?
[IC432 : 33pin]
OK
See "Check the input of DIR*3" in item 10
(Select AUX IN input on HEOS AVR)
NO
Connect router to this unit according to "QSG".
NO
NO
Check the soldering of peripheral parts.
If there are no abnormalities, [LINE IN terminal
JK471] is faulty.
(Select OPT input on HEOS AVR)
NO
Connect router to this unit according to "QSG".
NO
NO
Check the soldering of peripheral parts.
If there are no abnormalities, [OPT terminal JK431]
is faulty.
NO
Check the soldering of peripheral parts.
If there are no abnormalities, [IC437 BUFFER IC] is
faulty.
13. No sound from another HEOS speaker
Is there a connection between the router and this
unit?
YES
Are the settings correct in the HEOS app for the mobile device?
YES
Check the input of BUFFER IC (DIGITAL PCB)
Is the SPDIF signal OK?
[IC435 : 13pin]
OK
Check the input of DIR (DIGITAL PCB)
Is the SPDIF signal OK?
[IC432 : 31pin]
OK
See "Check the input of DIR*3" in item 10
51
(Select COAX input on HEOS AVR)
NO
Connect router to this unit according to "QSG".
NO
NO
Check the soldering of peripheral parts.
If there are no abnormalities, [COAX terminal
JK472] is faulty.
NO
Check the soldering of peripheral parts.
If there are no abnormalities, [IC435 BUFFER IC] is
faulty.