Panasonic Viera TH-42PX75U, Техническое руководство

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No Sound
<Symptom>
No Audio
<How to determine the defective board>
Is there a sound
waveform at pin 1
and 4 of CN A12 on
the A board?
No
Yes
Check the speakers.
(Make sure A12 is
properly seated).
No
Warning: Disconnect AC Power prior to
making any disconnection or
connection.
25
A board
Is there 15V at
pin 1 of CN A6 on
the A board?
Yes
Check the cable
between A6 on the A
board and P6 on the P
board.
Note: CN = Connector