Denon AVR-X4000 Service Manual page 104

4.3. Analog audio
No sound is output
Is the voltage of ±7V supplied to
SIDE CNT B'D BN64B 4-7pin?
YES
Is the audio signal transmitted to
INPUT B'D CN461?
NO
Is the serial data for electronic volume
transmitted to SIDE CNT B'D BN23B
15,16,17pin?
YES
Once more, checking the connection of the connector.
When can specify the trouble of the channel and function, check signal route where it
corresponds.
NO
The power supply of ±7V is repaired.
YES
The power amplifier is repaired.
NO
Is the connector correctly connected
with DIGITAL B'D?
104
NO
Connect the connectors properly.
YES
The DIGITAL B'D is repaired.