Sharp XV-ZW99U - No sound; 232 C failure

TROUBLE SHOOTING TABLE
(Coutinued)
I
No sound
r
Are
there audio signal
inputs
at pins
(2) and (23) of
IC1003?
Are there audio signal inputs
at
pins
No
(1) and (9) of IC7301?
Yes
I
I
l
IC5301
or
nearby circuit
in trouble.
1
I
______-__-__----I
Are
there
audio
signal
inputs
at
pins
No
(1)
and
(3)
of
connector SP?
I
Yes
I
I
t
tC7301
or
nearby circuit
in trouble.
I
*
I
______-
me-e-B--.
_________------
-I
I
I
I
Replace speaker.
I
I
________--_-_-_-
I
232C failure
Is
cable connected?
I
I
Reconnect cable.
I
I
__-_--_-
I
No --------
Is PC’s 2320 setting as specified?
Make PC port setting.
_________-__-__-
I
peripheral parts.
_________-____--
I
IS
there signal output at pin (10) of
No
IC409?
I
I
I
IC409 or nearby circuit in trouble.
1
I
_______-_------
-I
IS
there signal input at pin (4) of
No
IC2005?
_____-_--------_
Yes
I
,
Check signal line (connectors TH and I
I
CA) and related parts.
I
I
_______-_--m--v_
_________-------
I
I
I
IC2005 faulty.
I
I
_______----___--
I
I
xv-zw99u
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