Marantz AV7701 Service Manual page 106

4.2. Analog audio
No sound is output
Is the voltage of ±8V supplied to
SIDE CNT B'D CN41A 4-7pin?
YES
Is the audio signal transmitted to
INPUT B'D CN461?
NO
Is the serial data for electronic volume
transmitted to FRONT CNT B'D
CN43A 10,11pin?
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 ±8V is repaired.
YES
The HDAM amplifier is repaired.
NO
Is the connector correctly connected
with HDMI B'D?
106
NO
Connect the connectors properly.
YES
The HDMI B'D is repaired.