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1
No sound only from FRONT USB terminal or only from MHL terminal (There may be troubles with the power
source of circuit and control signals. Bad connection of cables and connectors should be also considered.)
A
Check the path of the relevant signal in FRONT HDMI USB ASSY.
Yes
Check the path of the relevant signal in DIGITAL MAIN ASSY.
No sound only in HDMI, MEDIA SERVER and INTERNET RADIO (There may be troubles with the power source of
circuit and control signals. Bad connection of cables and connectors should be also considered.)
Check the path of the relevant signal in DIGITAL MAIN ASSY.
B
No sound only in BT (Single channel - Check only the signal path of the relevant channel. Plural channels -
There may be troubles with power source, control signals: MUTE, DET and others. Bad connection of cables
and connectors should be also considered.)
Can it connect (paring) with any BT
Devices?
Yes
Check the degital audio signal output
(CN9203 - 26, 28, 30, 32, 34pin) of
C
DIGITAL MAIN ASSY
Yes
Replace the DIGITAL MAIN ASSY
No sound only in USB-DAC (There may be troubles with the power source of circuit and control signals.
Bad connection of cables and connectors should be also considered.) (SC-99, SC-LX89 only)
Check the path of the relevant signal in USB DAC ASSY.
D
Check the path of the relevant signal in DIGITAL MAIN ASSY.
No sound only in MULTI CH IN (There may be troubles with the power source of circuit and control signals.
Bad connection of cables and connectors should be also considered.) (SC-97, SC-LX79 only)
The signal of the relevant channel(2, 4, 6, 8, 10, 12, 14 and 16pin)
exists in CN2510
Yes
Check the broken point (start with checking the relevant channel (FL, FR, C, SW, SL, SR of
IC2501 and SBL, SBR of IC3273), and check the peripheral circuit.
E
No sound only in tuner (There may be troubles with the power source of circuit and control signals.
Bad connection of cables and connectors should be also considered.)
Check the path of the relevant channel in AUDIO ASSY, and check TUNER MODULE.
F
26
1
2
No
Is the Antenna (ADH7049) connected to
the Network Module(AXX7293)?
Yes
Yes
Is the Home Menu OSD displayed?
No
Replace the Network Module(AXX7293)
SC-99
2
3
No
Connect the Antenna (ADH7049)
to Network Module (AXX7293)
Remove the Network Module
(AXX7293) and check the following
No
voltages of CN9203
1pin or 3pin :1.2V /
2pin or 4pin : 2.5V /
7pin or 9pin : 1.8V /
8pin or 10pin : 3.3V
OK
Check the Power IC for problem voltage
or replace the DIGITAL MAIN ASSY
No
Check the circuit of the connection destination.
3
4
No Good
4
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