Sharp Aquos LC-46D92U, Service Manual

Page: 59 / 240

LC-46D92U/LC-52D92U
4 – 11
No audio (1)
[Audio signal] INPUT-1 No audio [Audio signal] INPUT-2 No audio [Audio signal] INPUT-3 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? [INPUT-3 input]
Is INPUT-3 selected on the input select
menu screen?
YES
NO
YES
NO
YES
NO
Is the audio output selected for
“VARIABLE” on the menu
screen? Is the audio output selected for
"VARIABLE" on the menu screen? Is the audio output selected for
"VARIABLE" on the menu
screen?
YES YES YES
Set the audio output to “FIXED”. Set the audio output to "FIXED". Set the audio output to
"FIXED".
[INPUT-1] Does the audio signal come from
pins (4) (L) and (2) (R) of input terminal
(J508) to pins (8) (L) and (6) (R) of connector
(SC502) on the TERMINAL unit? [INPUT-2] Does the audio signal come from pins
(4) (L) and (2) (R) of input terminal (J509) to pins
(12) (L) and (10) (R) of connector (SC502) on the
TERMINAL unit? [INPUT-3] Does the audio signal come
from pins (4) (L) and (2) (R) of input termi-
nal (J505) to pins (4) (L) and (2) (R) of con-
nector (SC502) on the TERMINAL unit?
YES
NO
YES
NO
YES
NO
Check the audio signal from
J508 to SC502, and their
peripheral circuits. Check the audio signal from J509 to
SC502, and their peripheral circuits. Check the audio signal from
J505 to SC502, and their
peripheral circuits.
[INPUT-1] Is there the audio signal input at
pins (8) (L) and (6) (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? [INPUT-3] Is there the audio signal input at
pins (4) (L) and (2) (R) of connector
(SC1102) on the MAIN unit?
YES
NO
YES
NO
YES
NO
Check the SC502 and SC1102
connectors Check the SC502 and SC1102 con-
nectors Check the SC502 and SC1102
connectors
[INPUT-1] Does the audio signal come from
pins (8) and (6) of SC1102 to pins (59)(L) and
(60)(R) of IC1404 (CODEC)? [INPUT-2] Does the audio signal come from pins
(12) and (10) of SC1102 to pins (53)(L) and
(54)(R) of IC1404 (CODEC)? [INPUT-3] Does the audio signal come
from pins (4) and (2) of SC1102 to pins
(61)(L) and (62)(R) of IC1404 (CODEC)?
YES
NO
YES
NO
YES
NO
Check the line between SC1102
and IC1404 and their periph-
eral circuits. Check the line between SC1102 and
IC1404 and their peripheral circuits. Check the line between
SC1102 and IC1404 and their
peripheral circuits.
Is there the audio signal output at pins (38)(L) and (39)(R) of IC1404?
NO
Check IC1404 and its
peripheral circuits.
YES
Is there the audio signal output at pins (11)(L) and (14)(R) of connec-
tor (SC1301) on the main unit?
NO
Check the line between IC1404 and SC1301.
YES