No Audio
Using
the remote or
the manual keyboard,
access the audio menu to
NO
YES
assure the speakers are on
and the input selection is a
known good source.
Will this restore
audio?
Problem
solved.
Does the
power supply
generate the audio
NO
YES
supply voltages (24 VDC
at pins 3 and 4 of CN8)
when the unit is
turned
on?
Replace the
Replace the
power supply
Main module
module.
SMART2009-LCD509-V4 Page 7 of 11