Sharp LC-52D82U Service Manual page 67

YES
Is there the MUTE signal
input at pin (1) of IC1305?
NO
YES
Is there the SPDIF signal
input at pin (1) of DIGITAL
NO
AUDIO OUTPUT terminal
(D1313)?
Check the
MUTE_A_ALL and
ACDET_MUTE signals.
Check D1313 and its
peripheral circuits.
Replace as required.
No optical output under
the following conditions
as per HDMI require-
ments.
* Audio contents pro-
tected
* Audio frequency
beyond 48 KHz
* Audio bit length
beyond 16 bits
4 – 19
No monitor audio
YES
Is the audio output from the
monitor set at "VARIABLE"
NO
or "FIXED" on the menu
screen?
YES
Are the audio signal outputs
at pins (40)(L) and (41)(R)
NO
of IC1404?
YES
Are the audio signal inputs
at pins (3)(L) and (5)(R) of
NO
IC1408 (BUFF_AMP.)?
YES
Are the audio signal outputs
at pins (1)(L) and (7)(R) of
NO
IC1408?
YES
Are the audio signal outputs
at pins (16)(L) and (14)(R)
NO
of connector (SC1102) on
the main unit?
YES
Are the audio signal inputs
at pins (10)(L) and (16)(R)
NO
of connector (SC502) on
the TERMINAL unit?
YES
Check the signal up to the
monitor audio output termi-
NO
nal (J502).
LC-46D82U/LC-52D82U
Check the bus line
(SCL0_5/SDA0_5)
and IC1404. Replace
as required.
Check IC1404 and its
peripheral circuits.
Replace as required.
Check the line
between IC1404 and
IC1408, and their
peripheral circuits.
Check IC1408 and its
peripheral circuits.
Replace as required.
Check the line
between IC1408 and
SC1102, and their
peripheral circuits.
Check the SC1102
and SC502 connec-
tors.
Check the MUTE.R
line (Q507 thru Q509,
etc.)