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No external audio heard
< INPUT 5 >
Is there the L-ch audio signal input from pin (7) of input terminal
J502 to pin (U4) of IC3301?
Is there the R-ch audio signal input from pin (5) of input terminal
J502 to pin ( U5 ) of I C3301?
< INPUT 4 >
Is there the L-ch audio signal input from pin (13) of input terminal
J502 to pin ( T6) of I C3301?
Is there the R-ch au dio signal input from pin (11) of input terminal
J502 to pin ( T7 ) of I C3301?
Is there the I2S signal output at pin ( J19),(J20) of IC3301 ?
I
t s
e h
e r
a
d u
o i
g i s
a n
n i l
u p
a t
p t
n i
Is the L-ch audio signal output at pin(26), (27) ,(30),(31) of
IC1702 normal ?
Is the R-ch audio signal output at pin(10), (11),(14),(15) of
IC1702 normal ?
Are the audio signal L-ch and R-ch output at (3)/(4) and (1)/(2) of
P1701 normal?
Check speakers and their peripheral circuits.
No audio heard (2)
YES
YES
6 (
o )
I f
1 C
0 7
? 2
YES
YES
YES
NO
Check IC3301 and its peripheral circuits.
N
O
Check connection between IC3301 and IC1702 and its periph-
eral circuits.
NO
Check IC1702 and its peripheral circuits.
NO
Check circuit between IC1702 & P1701.
4 – 5
LC-32LE265T / LC-40LE265T
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