LC-60/70LE740E/RU,741E/S,743E,60LE840E/RU,841E/S,843E,80LE645E/RU,646E/S,648E (1st Edition)
6 – 24
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?
In the case of LE840,LE843 series, refer to (A).
In the case of LE841 series, refer to (B).
(B)
(A)
Does SIF signal output from pin (8) of TUNER
(TU1102)?
NO Check the tuner and its peripheral circuits.
Replace as required.
YES
Does SIF signal input to pin [AM24/CPU_ATV_IF+] of
IC3303 (Digital AV decode & Main CPU)?
NO Check the line between TU1102 and IC3303. (Q1102, etc.)
YES
Refer to “The sound is not emitted from the Speaker & Woofer though the picture has come out.”
Does SIF signal output from pin (8) of TUNER (TU1104)? NO Check the tuner and its peripheral circuits.
Replace as required.
YES
Does SIF signal input to pin [AM24/CPU_ATV_IF+] of IC3303
(Digital AV decode & Main CPU)?
NO Check the line between TU1104 and IC3303. (Q1102, etc.)
YES
Refer to “The sound is not emitted from the Speaker & Woofer though the picture has come out.”
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