Sharp LC-37D90U User Manual

LC-37D90U
6 – 16
YES
Is the audio output from the
monitor set at “VARIABLE”
or “FIXED” on the menu
screen?
NO
Check the bus line
(SCL0/SDA0_5) and
IC1403. Replace as
required.
Is there the MUTE signal
input at pin (2) of IC1408?
NO
Check the
MUTE_A_ALL and
ACDET_MUTE signals.
YES
YES
Are the audio signal outputs
at pins (40)(L) and (41)(R)
of IC1403?
NO
Check IC1403 and its
peripheral circuits.
Replace as required.
Is there the SPDIF signal
input at pin (1) of DIGITAL
AUDIO OUTPUT terminal
(D1402)?
NO
Check IC1402 and its
peripheral circuits.
Replace as required.
YES
Are the audio signal inputs
at pins (3)(L) and (4)(R) of
IC1407 (BUFF_AMP.)?
NO
Check the line
between IC1403 and
IC1407, and their
peripheral circuits.
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
YES
Are the audio signal outputs
at pins (1)(L) and (7)(R) of
IC1407?
NO
Check IC1407 and its
peripheral circuits.
Replace as required.
YES
Are the audio signal outputs
at pins (16)(L) and (14)(R)
of connector (SC1102) on
the main unit?
NO
Check the line
between IC1407 and
SC1102, and their
peripheral circuits.
YES
Are the audio signal inputs
at pins (16)(L) and (14)(R)
of connector (SC502) on
the IF unit?
NO
Check the SC1102
and SC502 connec-
tors.
YES
Check the signal up to the
monitor audio output termi-
nal (J502).
NO
Check the MUTE.R
line (Q507 thru Q509,
etc.)

Sharp LC-37D90U Specifications

General

Brand	Sharp
Model	LC-37D90U
Category	TV
Language	English