Marantz NR1506 /U1B Service Manual page 74

4.3. Analog audio
No audio output.
Is a voltage of ± 8 V supplied to AV
PCB CN5201?
YES
Is there an audio signal in AV PCB
CN4801?
NO
Is the connector correctly connected
to the HDMI PCB?
YES
Reconnect 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
Connect the connectors correctly.
YES
Repair the HDMI PCB.
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