Sharp LC-42D85X Service Manual page 54

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