Sharp LC-19SH7E/RU, Service Manual, Page: 59 / 267

2008-03-14
LC-19SH7E/RU, LC-26SH7E/RU, LC-32SH7E/RU, LC-42SH7E/RU
59
No sound (during the reception of TV (DIGITAL) broadcasting)
↓
Does not the sound go out though the picture has come out when DTV is received?
MAIN UNIT:
↓
↓ YES
↓ YES
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?
TEREMINAL UNIT:
↓
↓ YES
↓ YES
No sound from external input devices (2)
↓
Does not the sound of the audio signal input to AV1(Component) go out?
MAIN UNIT:
↓
↓ YES
↓ YES
Is the DIF signal output from pin (20) and pin (21) of TUNER
(TU201)?
NO
Check the tuner and its peripheral circuits. Replace as required.
Refer to
“
No sound output in all modes
”
.
Is the audio signal properly sent to pin (6) (SCT1_AUL_IN) and pin
(2) (SCT1_AUR_IN) of SCART1(CN500)?
Is the audio signal properly sent to pin (6) (SCT2_AUL_IN) and pin
(2) (SCT2_AUR_IN) of SCART2(CN501)?
Check the setting of an external input device that connects of
CN500. NO
Check the setting of an external input device that connects of
CN501. NO
Is the audio signal properly sent to pin (44) (SC1_LIN) and pin (43)
(SC1_RIN) of IC U605?
Is the audio signal properly sent to pin (46) (SC2_LIN) and pin (45)
(SC2_RIN) of IC U605?
NO
NO
Check the line between CN500 and IC U605.
Check the line between CN501 and IC U605.
Refer to
“
No sound output in all modes
”
.
Is the audio signal properly sent to pin (2) (AV1_AudioLIN) and pin
(4)(AV1_AudioRIN) of CN556?
NO
Check the connection to CN556 and the external input device.
Refer to
“
No sound output in all modes
”
.
Is the audio signal properly sent to pin (50) (AV1_LIN) and pin (49)
(AV1_RIN) of IC U605?
NO
Check the line between CN556 and IC U605.
Is the DIF signal sent to pin (R25) and pin (T25) of IC U400?
NO
Check IC U400 its peripheral circuits.