Table of Contents
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Some of the sources defeat
Check
the
source's audio signal has
been inputted into Main IC
correctly; Check the HDMI
EDID and HDCPKEY.
Check the Main IC'
periphery circuits. Try
to upgrade software.
Change main IC, DDR.
It is need to check Tuner's outputs when in TV source. And check the IIS signals from main IC.
Check the Mute circuits and AMP reset's function.
Abnormal sound
abnormal
Check the signals from
Main
No
Check IIS and IIC bus.
Check
supply
Check
Check
signals of AMP
Service manual of MT31AS
All of the sources defeat
No
Check AMP's outputs
IC
to
AMP;
Ok
the
power
for
AMP;
the
Mute;
the
Reset
Ok
Check the filter
capacitance
and speaker
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