Read Sharp LC-60LE925E (serv.man18) Service Manual online
LC-46/60LE925E (1st Edition)
7 – 4
No sound (during the reception of TV (DIGITAL-Satellite) broadcasting)
Does not the sound go out though the picture has come out when DTV is received?
Is signal input to TU1301?
NO
Check the setting of an external input device that connects with
TU1301.
TU1301.
YES
Is signal sent to pins (2, 3/CS_TS_CK, 5, 6/CS_TS_SY, 10, 11/
CS_TS_VA, 14/CS_TS_D7) of IC4409 (TS SW)?
CS_TS_VA, 14/CS_TS_D7) of IC4409 (TS SW)?
NO
Check the line between TU1301 and IC4409.
Check TU1301 and its peripheral circuits (IC1301 etc.).
Replace as required.
Check TU1301 and its peripheral circuits (IC1301 etc.).
Replace as required.
YES
Is pins (2) of IC4409 at L?
NO
Check the line between IC4409 and 21pins of IC4405.
YES
Is signal sent to pins (4/CS_TS_SCK, 7/CS_TS_SSY, 9/
CS_TS_SVA, 12/CS_TS_SDATA) of IC4409?
CS_TS_SVA, 12/CS_TS_SDATA) of IC4409?
NO
Check IC4409 and its peripheral circuits.
YES
Is signal sent to pins (11/T0_DATA1, 12/T0_DATA2, 13/
T0_DATA3, 14/T0_DATA4) of IC4405 (CI Controller)?
T0_DATA3, 14/T0_DATA4) of IC4405 (CI Controller)?
NO
Check the line between IC4409 and IC4405.
YES
Is signal output to pins (122/TS_VALIDO, 123/TS_CLKO, 124/
TS_DATAO, 125/TS_SYNCO) of IC4405?
TS_DATAO, 125/TS_SYNCO) of IC4405?
NO
Check IC4405 and its peripheral circuits.
YES
Is signal sent to pins (A30/TS_CPUIN_VAL, B30/
TS_CPUIN_CLK, C30/TS_CPUIN_SYNC, C29/TS_CPUIN_D0)
of IC3302 (Digital AV decode & Main CPU)?
TS_CPUIN_CLK, C30/TS_CPUIN_SYNC, C29/TS_CPUIN_D0)
of IC3302 (Digital AV decode & Main CPU)?
NO
Check the line between IC4405 and IC3302.
YES
Refer to “No sound output in all modes.”
No sound from external input devices (1)
Does not the sound of the audio signal input to EXT1 go out?
Is there a audio input signal to pins (19/AUDIO_IN_L) and (21/
AUDIO_IN_R) of EXT1 (SC505)?
NO
Check the setting of an external input device that connects with
EXT1.
EXT1.
YES
Is there a audio input signal to pins (V28/SC1_L) and (V27/
SC1_R) of IC3302 (Digital AV decode & Main CPU) from SC505?
SC1_R) of IC3302 (Digital AV decode & Main CPU) from SC505?
NO
Check the line between SC505 and IC3302.
YES
Refer to “No sound output in all modes.”
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