Sanyo PDP-63XR7HB, Service Manual

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3.With picture but no sound
4. A certain channel is abnormal
4.1 No picture on AV1
4.2 No picture on S-terminal
The sound power amplifier or peripheral
circuit has problem. Check power supply,
GAIN, SHUTDOWN; if output
short-circuited or other problems that
causes protection to work.
Check if the main board X111 is output.
Is there audio output from
sound amplify board
Check if N103 input the signal.
Speaker
damaged
Check N103
peripheral circuit,
crystal and power
supply
Check each level of
circuit following
input audio signal
channel.
No Yes
No Yes
No Yes
Check if the CS10 has
the signal input.
Check periphery circuit of NS01,
crystal and power supply
The path from AV1 terminal
to NS01 has problem
Yes No
Check if the CS10 and CS16
have the signal input.
Check periphery circuit of NS01,
crystal and power supply
Yes No
The path from S terminal
to NS01 has problem