NO SOUND_PICUTRE OK
Terminal Unit
Is the audio signal output of pin
(H26) (AL0) and pin (H25) (AR0) of IC U400 normal? => NO => Check IC U400
and its peripheral circuits.
If Yes
Is the audio signal output of pin
(17) (PGA2OUTL) and pin (18) (PGA2OUTR) of IC U605 normal? =>NO => Check
IC U605 and its peripheral circuits.
If Yes
Is audio signal input to pin (2)(L),
pin (14)(R) of IC U600 (AMP)? => NO => Check the line between IC U605 and
IC U600.
If Yes
Is MUTE circuit [AMP_MUTE_LINE,
POWERUP_LINE] normal?=-> NO => Check the AMP_MUTE_LINE and POWERUP_LINE.
(Q600, etc.).
If Yes
Is the audio signal output of pin (3,
4) (L-ch) and pin (1, 2) (R-ch) of CN600 (AOUDIO-CONNECTOR) normal? => NO
=> Check IC U600 and its peripheral circuits.
If Yes
Check Speaker Box (right and left)
and wire harness.
NO SOUND [DURING THE RECEPTION OF TV (ANALOG) BROADCASTING.
Does not the sound go out though the
picture has come out when UHF/VHF is received? Is the SIF signal output from pin (11) of TUNER (TU200)? =>
NO => Check the tuner and its peripheral circuits. Replace as required.
If Yes
Is the SIF signal sent to pin (AB25)
and pin (AB26) of IC U400? => NO => Check IC U400 its peripheral
circuits.
Does not the sound go out though the
picture has come out when DTV is received?
Main Unit.
Is the DIF signal output from pin
(17) and pin (19) of TUNER (TU200)? => NO => Check the tuner and its
peripheral circuits. Replace as required.
If Yes
Is the DIF signal sent to pin (R25)
and pin (T25) of IC U400? => No => Check IC U400 its peripheral circuits.
NO SOUND FROM EXTERNAL INPUT DEVICES
[1]
Does not the sound of the audio
signal input to SCART1 go out? Does not
the sound of the audio signal input to SCART2 go out?
Terminal Unit
·
Is the
audio signal properly sent to pin (6) (SCT1_AUL_IN) and pin (2) (SCT1_AUR_IN)
of SCART1(CN500)? => NO => Check the setting of an external input device
that connects of CN500.
·
Is the
audio signal properly sent to pin (6) (SCT2_AUL_IN) and pin (2) (SCT2_AUR_IN)
of SCART2(CN501)? => NO => Check the setting of an external input device
that connects of CN501.
If Yes
·
Is the
audio signal properly sent to pin (44) (SC1_LIN) and pin (43) (SC1_RIN) of IC
U605? => NO => Check the line between CN500 and IC U605.
·
Is the
audio signal properly sent to pin (46) (SC2_LIN) and pin (45) (SC2_RIN) of IC
U605? => NO => Check the line between CN501 and IC U605.
NO SOUND FROM EXTERNAL INPUT DEVICES
[2]
Does not the sound of the audio
signal input to AV1(Component) go out?
Main Unit
Is the audio signal properly sent to
pin (2) (AV1_AudioLIN) and pin (4)(AV1_AudioRIN) of CN553? => NO => Check
the connection to CN553 and the external input device.
If Yes
Is the audio signal properly sent to
pin (50) (AV1_LIN) and pin (49) (AV1_RIN) of IC U605? => NO => Check the
line between CN553 and IC U605.
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