Marantz SR7009/U1B Service Manual page 112

4.3. Analog audio
No audio output.
Is a voltage of ± 7V supplied to SIDE
CNT PCB CN64C 4-7pin?
YES
Is there an audio signal in INPUT PCB
CN461?
NO
Is electron volume serial data be-
ing sent to SIDE CNT PCB CN23C
15,16,17pin?
YES
Once more, connect the connectors correctly.
If the malfunctioning channel and function can be identified, check the correspond-
ing signal path.
NO
Repair the ± 7V power supply.
YES
Repair the power amplifier.
NO
Is the connector correctly connected
with DIGITAL PCB?
112
NO
Connect the connectors correctly.
YES
Repair the DIGITAL PCB.