SHARP _ LCD TV _ LC-32SH25E_ No Sound - Picture OK _ Troubleshooting _ Service Help

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.