• It is assumed that there is no loose connection or damage in the LCRs.
• Refer to "DIGITAL MOTHER Assy Check Points (DSP Section)" as the parts marked to in the troubleshooting are located.
1) Simplified diagnosis
DSP block malfunction is detected.
(The part can be roughly expected just by operation of the main unit.)
• Has DSP block caused the malfunction?
Inputing a 2ch PCM (such as CD) digital signal, check if the sound plays by switching AUTO SURR / STREAM DIRECT.
When the sound doesn't play in AUTO SURROUND or DIRECT MODE though it does in PURE DIRECT (PCM
DIRECT) MODE, DSP block might be defective.
Step 2: Power supply
Step 1: Connections
CN2005, CN2006,CN2007,
CN2008,CN2402,CN2403,
CN2901,CN2902,CN2903
Are the
connectors securely
inserted?
Insert the connectors
securely.
Connection with
INTERFACE Assy.
Connection with
COMPONENT Assy.
Connection with
DISPLAY Assy.
Connection with
HDMI Assy.
Connection with
FRONT- I N Assy.
No
CN2403 (Pins 1-3)
IC2710 (Pin 2)
Is the voltage
6V?
No
6V input
1st, 2nd Block 3.3V
No
Replace CN2403.
Check the output from the
DCDC Assy.
Ye s
Replace IC2710.
Ye s
Is there
any loose connection
at Pins 1-3 of
CN2403?
Is the voltage
3.3V?
No No
The output and GND may be short-
circuited. Check the path between
them.
Ye s
Ye s
Is IC2710
abnormally hot?
A
Ye s
Is the
FFC securely
inserted?
Is the
FFC securely
inserted?
Is the
FFC securely
inserted?
Is the
cable securely
inserted?
Insert the connectors
securely.
No
Ye s
CN2001
Insert the connectors
securely.
No
Ye s
CN2002
Insert the connectors
securely.
No
Ye s
CN2003
Insert the connectors
securely.
No
Ye s
CN2401
To Step2
A
A
AY
B
IC2701 (Pin 72, etc.)
1st DSP 3.3V
Is the voltage
3.3V?
No
Ye s
D
C
IC2710 (Pin 4)
1st, 2nd Block 3.3V
Is the voltage
4.2-4.5V?
No
Ye s
Check the parts and patterns
in the path.
Check the parts and patterns
in the path.
Check the parts and patterns
in the path.
IC2704 (Pin 20)
LATCH 1
Is the voltage
3.3V?
No
Ye s
E
2) Troubleshooting
[2] DSP Troubleshooting
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