Sharp LC-37D90U Service Manual page 90

LC-37D90U
[Audio signal] INPUT-1 No audio
[Audio signal] INPUT-2 No audio
[INPUT-1 input]
Is INPUT-1 selected on the input select menu
screen?
[INPUT-2 input]
Is INPUT-2 selected on the input select menu
screen?
YES
Is the audio output selected for
"VARIABLE" on the menu
screen?
Set the audio output to "FIXED".
[INPUT-1] Does the audio signal come from
pins (12)(L) and (18)(R) of input terminal
(J501) to pins (4)(L) and (2)(R) of connector
(SC502) on the IF unit?
[INPUT-2] Does the audio signal come from
pins (10)(L) and (16)(R) of input terminal
(J501) to pins (12)(L) and (10)(R) of connec-
tor (SC502) on the IF unit?
YES
Check the audio signal from
J501 to SC502, and their
peripheral circuits.
[INPUT-1] Is there the audio signal input at
pins (4)(L) and (2)(R) of connector (SC1102)
on the main unit?
[INPUT-2] Is there the audio signal input at
pins (12)(L) and (10)(R) of connector
(SC1102) on the main unit?
YES
No audio (1)
[Audio signal] INPUT-4 No audio (HDMI analog
[Audio signal] INPUT-5 No audio (DVI analog
[HDMI analog input]
Is INPUT-4 selected on the input select menu
screen?
[DVI analog input]
Is INPUT-5 selected on the input select menu
screen?
YES
NO
Is the audio output selected for "VARI-
ABLE" on the menu screen?
YES
Set the audio output to "FIXED".
[HDMI analog input] Does the audio signal come
from input terminal (J1501) to pins (59)(L) and
(60)(R) of IC1403?
[DVI analog input] Does the audio signal come
from input terminal (J1502) to pins (55)(L) and
(56)(R) of IC1403?
YES
NO
(HDMI analog input)
Check the line between J1501 and
IC1403, and their peripheral circuits.
(DVI analog input)
Check the line between J1502 and
IC1403, and their peripheral circuits.
NO
input)
input)
NO
YES
NO
6 – 11
[With HDMI connected] No audio (2)
[Audio signal] INPUT-3 No audio (HDMI
connected)
[Audio signal] INPUT-4 No audio (HDMI
connected)
[INPUT-3 input] Is INPUT-3 selected on
the input select menu screen?
[INPUT-4 input] Is INPUT-4 selected on
the input select menu screen?
YES
Is the audio output selected
for "VARIABLE" on the menu
screen?
Set the audio output to
"FIXED".
[INPUT-3] If no video appears, refer to "No
external input video (HDMI) [INPUT-3]".
[INPUT-4] If no video appears, refer to "No
external input video (HDMI) [INPUT-4]".
YES
Is the SII9011_MUTE line as specified?
YES
Check Q1301, IC1303 and
their peripheral circuits.
Does the HDMI_SPDIF signal come from
pin (70) of IC1508 to pin (2) of IC1403
(CODEC)?
NO
YES
NO