Troubleshooting Sound Out Flow/ - 23
Sound Out Flow
The iMac has two sound out paths: via external speakers connected
to the sound out connector on the logic board; or, via the internal
speakers, which are located on the front of the unit directly
beneath the display.
To transmit sound out the internal speakers, the sound signals
must travel (via the short internal audio cable) from the J14
audio connector on the logic board to the J7 connector on the A/V
interconnect board. From there, the signals are transmitted to the
J9 connector on the other side of the A/V interconnect board. And
then the sound out signals travel via the long internal audio cable
to the internal speakers.
Sound that is transmitted to the external speakers travels directly
from the sound out connector on the logic board to the external
speakers via their external cable hookup.