No Audio - Panasonic TC-32LX70/70 Technical Manual

No Audio

A Board
Determine which audio input is
defective. Check for poor solder
connections in the vicinity of the
audio connection in question.
Yes
Is the Audio
Problem
Solved
Change the A board.
Try using a different audio input
source. Try the Tuner, Component,
S Video or HDMI input.
Yes
Are other
Audio inputs
ok?
No
No
OK ?
Check the L/R speaker output
connection.
Reseat connector A5 and A6.
Does this fix
the Audio
problem?
Is there 15V on
pins 2 & 3 of
connector
AP3/A3?
Yes
Change the A Board.
57
Yes
Problem
Solved
No
Check regulator IC7215
No
and biasing component
on the AP Board.
Replace if defective.