Sharp LC-60LE600U Service Manual page 38

LC-60/70LE600U
VIDEO No audio
Is VIDEO selected on the input select menu screen?
Refer to ": No external input video [VIDEO]".
YES
Is the audio output selected for "VARIABLE" on the menu screen?
Set the audio output to "FIXED".
YES
Does the audio signal come from pins (5) (L) and (4) (R) of input
terminal (J508) to the terminal on IC3301 side of C3329 (L) and
C3330 (R)?
Check the line between J508 and IC3301.
YES
Does the I2S audio signal come from terminals on IC3301 side of R3413
(I2S_MCLK), R3414 (I2S_SCLK), R3415 (I2S_LRCLK), and R3416 (I2S_DAT) to
pins (5) (MCK), (7) (SCLK), (8) (LRCLK), and (5) (SDATA) of IC2704 (AMP)?
Check IC3301 and its peripheral circuits.
Check the line between IC3301 and IC2704.
(N_AMP_RST, SP_MUTE etc.)
YES
Is the audio output from IC2704 as specified?
YES
Check the connector (P2701), speakers and their peripheral circuits.
No audio (1)
NO
NO
NO
NO
6 – 6
COMPONENT No audio
Is COMPONENT selected on the input select menu screen?
Refer to ": No external input video [COMPONENT]".
YES
Is the audio output selected for "VARIABLE" on the menu screen?
Set the audio output to "FIXED".
YES
Does the audio signal come from pins (2) (L) and (4) (R) of input terminal
(J504) to the terminal on IC3301 side of C3331 (L) and C3332 (R)?
Check the line between J504 and IC3301.
YES
NO Check IC2704 and its peripheral circuits.
NO
NO
NO