Denon HEOS AVR Service Manual page 50

10. 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 : 45pin] LINE_IN_R
[IC480 : 46pin] LINE_IN_L
OK
Check the input of DIR*3
(DIGITAL PCB)
Is the ANALOG signal OK?
[IC432 : 47pin] VINL
[IC432 : 48pin] VINR
OK
Check the input of PLD (DIGITAL PCB)
[IC431 : 29pin] ADCA_DATA_INPUT
[IC431 : 30pin] ADCA_LRCK
[IC431 : 33pin] ADCA_BCLK
[IC431 : 35pin] ADCA_MCLK
OK
Check the input of D/A (DIGITAL PCB)
Is [IC474 : 17pin] DIST_MUTE set to the "Hi" level?
[IC474 : 12pin] SDAC_MCLK
[IC474 : 13pin] SDAC_BCK
[IC474 : 15pin] SDAC_LRCK
[IC474 : 14pin] SDAC_DATA
OK
Check the input of DIR (DIGITAL PCB)
Is the ANALOG signal OK?
[IC433 : U12-47pin] DIST_L
[IC433 : U12-48pin] DIST_R
OK
(Select LINE 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
JK472] is faulty.
NO
Check the soldering of peripheral parts.
If there are no abnormalities, [IC480 Volume IC] is
faulty.
NO
Check the soldering of peripheral parts.
If there are no abnormalities, [IC432 DIR IC] is
faulty.
NO
Check the soldering of peripheral parts.
If there are no abnormalities, [IC431 PLD IC] is
faulty.
NO
Check the soldering of peripheral parts.
If there are no abnormalities, [IC474 D/A IC] is
faulty.
OK
Check the input of Network Module (DIGITAL PCB)
[CN501 : 23pin] AIOS_LRCK(IN)
[CN501 : 24pin] AIOS_I2S(IN)
[CN501 : 25pin] AIOS_I2S_SCLK(IN)
OK
Check the soldering of peripheral parts.
If there are no abnormalities, Speaker UNIT is faulty.
50
NO
Check the soldering of peripheral parts.
If there are no abnormalities, [IC433 DIR IC] is
faulty.