Marantz SR5009/U1B Service Manual page 84

4.3. Analog audio
No audio output.
Is a voltage of ±7V supplied to INPUT
PCB CN4006?
YES
Is there an audio signal in INPUT
PCB CN401?
NO
Is electron volume serial data being
sent to INPUT PCB CN4200?
YES
Once more, connect the connectors correctly.
If the malfunctioning channel and function can be identified, check the corresponding
signal path.
NO
Repair the ±7V power supply.
YES
Repair the power amplifier.
NO
Is the connector correctly connected
with HDMI PCB?
84
NO
Connect the connectors correctly.
YES
Repair the HDMI PCB.