Sharp LC-60LE740E Service Manual page 153

LC-60/70LE740E/RU,741E/S,743E,60LE840E/RU,841E/S,843E,80LE645E/RU,646E/S,648E
Does not the sound go out though the picture has come out when UHF/VHF is received?
In the case of LE645,LE648 series, refer to (A).
In the case of LE646 series, refer to (B).
Does SIF signal output from pin (8) of TUNER
(TU1102)?
Does SIF signal input to pin [AM24/CPU_ATV_IF+] of
IC3303 (Digital AV decode & Main CPU)?
Refer to "The sound is not emitted from the Speaker."
(B)
Does SIF signal output from pin (8) of TUNER (TU1104)?
Does SIF signal input to pin [AM24/CPU_ATV_IF+] of IC3303
(Digital AV decode & Main CPU)?
Refer to "The sound is not emitted from the Speaker."
No sound (during the reception of TV (ANALOG) broadcasting)
(A)
YES
YES
YES
YES
NO Check the tuner and its peripheral circuits.
Replace as required.
NO Check the line between TU1102 and IC3303. (Q1102, etc.)
NO Check the tuner and its peripheral circuits.
Replace as required.
NO Check the line between TU1104 and IC3303. (Q1102, etc.)
6 – 45