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A loss of audio in one or more channels can either be caused by a break in the signal
flow or a line being muted. Use the following two diagrams to see the audio signal
flow, the mute locations, and the location of accessible capacitors in the signal path
for signal tracing.
How to trace down no audio (one or more channels)
Once an audio tone is generated (A) it can be followed through the unit (B).
A- Generating test audio to the speakers: Refer to figure 15.
Notice: When a headphone is plugged in, all the audio to the subwoofer amplifier is
muted so there is no sound from any speaker (only to the headphones).
1. TV, VCR, and FM – These stereo audio inputs produce audio from the front
and subwoofer speakers only unless the remote's "Super Srnd" button is
pressed. Then "S.SRND" appears on the front panel and all 6 channels output
audio.
2. DVD - When playing a DVD movie with DTS or Dolby Digital ("SFC" will light in
the display and) all 6-channels will work. Older stereo-only movies (no SFC
light) will only deliver 2-channel stereo sound. When the remote's "Super
Srnd" is pressed, the front panel display shows "Error".
SA-HT730 / SAHT930
III "No Audio" Problems
22
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