LC-42/46/52D85X
6 – 5
No sound from external input devices (4)
Does not the sound of the audio signal input to INPUT6 (Analog)
go out?
Does not the sound of the audio signal input to INPUT7 go out?
MAIN UNIT:
Whether “Analog” has selected it in the Audio setup of the HDMI
option is checked.
MAIN UNIT:
YES
Is audio signal sent from pin (2/L) and (3/R) of input terminal
J1502 to pin (1) and (6) of IC1504 (SW)?
YES
Is audio signal sent from pin (2/L) and (3/R) of input terminal
J1501 to pin (3) and (7) of IC1504 (SW)?
NO
NO
Check the connection between J1502 and the peripheral circuit,
the external input devices.
Check the connection between J1501 and the peripheral circuit,
the external input devices.
Is audio signal output from pin (15/HDMI_PC_L) and pin (11/HDMI_PC_R) of IC1504 to pin (24) and (26) of connector SC1101?
SUB UNIT:
YES
NO
Check the line between IC1504 and SC1101, and their peripheral
circuits.
Is audio signal (HDMI_PC_L=MAIN_L, HDMI_PC_R=MAIN_R)
sent to pins (24) and (26) of SC501?
NO
Check the connector (SC1101/SC501)
YES
Is audio signal input to pin (59/MAIN_L) and (60/MAIN_R) of
IC1404 (CODEC)?
NO
Check the line between P501 and IC1404.
YES
Refer to “No sound output in all modes”.
The audio signal is not output (1)
No audio signal output from AUDIO_OUTPUT terminal.
SUB UNIT:
Is audio signal output to pin (5/L-ch), (4/R-ch) of audio output ter-
minal J1701?
YES
Check the connection to J1701 and external devices.
NO
Do pin (72)] of MONITOR_MUTE_LINE [IC506
(VIDEO_SELECTOR), pin (55)] of MUTE-A_ALL_LINE
[MAIN_UNIT IC2002 (UCON) become H?
YES
Check the IC506,IC2002, its peripheral circuit and
MONITOR_MUTE_LINE, MUTE-A_ALL_LINE.
(Q1701, Q1702, etc.)
NO
Is the audio signal output of pins (40/L-ch) and (41/R-ch) of
IC1404 (CODEC)?
YES
Check the line between IC1404 and J1701.
(IC1405, Q1401, Q1402, etc.)
NO
Check IC1404 and its peripheral circuits.
