LC-40E67U/LC-40E77U
6 – 9
No audio (1)-2
INPUT-3 No audio.
Is INPUT-3 selected on the input select menu screen?
YES
NO
Refer to “: No external input video [INPUT-3]”.
Is the audio output selected for “VARIABLE” on the menu
screen?
YES
NO
Set the audio output to “FIXED”.
Does the audio signal come from pins (5) (L) and (4) (R) of input
terminal (J501) to pins (14) (L) and (5) (R) of IC503 (AUDIO
SWITCH)?
YES
NO
Check the line between J501 and IC503.
Does the audio signal come from pins (13) (L) and (3) (R) of
IC503 to pins (B2) (L) and (A1) (R) of IC8001 (CPU)?
YES
NO
Check IC503/IC8001 and its peripheral circuits
(IC502, Q509, Q510,etc).
Check the line between IC503 and IC8001.
Does the audio signal come from pins (C4/A3) (SPOUT_L/R) of
IC8001 (CPU) to pins (3) (INLP), and (7) (INRP) of IC2701
(AMP)?
NO
Check the line between IC8001 and IC2701, and their peripheral
circuits (Q1306/Q1307, AMP_MUTE line, etc).
YES
Is the audio output from IC2701 as specified?
NO
Check IC2701 and its peripheral circuits.
YES
Check the connector (P2701), speakers and their peripheral cir-
cuits.
Summary of Contents for LC40E67U - LC - 40" LCD TV
Page 23: ...LC 40E67U LC 40E77U 5 5 8 click means COMPLETE 9 Click OK ...
Page 25: ...LC 40E67U LC 40E77U 5 7 12 Click means COMPLETE 13 In the screen below click Debug Settings ...
Page 27: ...LC 40E67U LC 40E77U 5 9 ...
Page 64: ...LC 40E67U LC 40E77U 6 17 MEMO ...
Page 90: ...LC 40E67U LC 40E77U 9 17 MEMO ...
Page 111: ...LC 40E67U LC 40E77U ...
