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4T-C6070AH1X
No external audio heard
< INPUT 3 >
Is there the L-ch audio signal input from pin (6) of input terminal
J502 to pin (46 ) of IC3301?
Is there the R-ch audio signal input from pin (3) of input terminal
J502 to pin ( 47 ) of I C3301?
2
I
S
I
t s
e h
e r
i s
n g
l a
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.
YES
YES
n i
u p
a t
p t
n i
(
5,6,7,8 )
f o
C I
1
0 7
? 2
YES
YES
YES
No audio heard (2)
NO
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.
6 – 5
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