LC-46XL2E (serv.man4). Troubleshooting Table - Sharp TV Service Manual (repair manual). Page 5

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LC-42XL2E/S/RU, LC-46XL2E/S/RU, LC-46X20E/S/RU, LC-52XL2E/S/RU, LC-52X20E/S/RU
4 – 5
No sound from external input devices (4) 
                                            
                                             
Does not the sound of the audio signal input to EXT6 (Analog) go 
out?
Does not the sound of the audio signal input to EXT7 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?
TERMINAL 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”.
No sound from external input devices (5) 
                                            
Does not the sound of the audio signal input to EXT8 go out?
TEREMINAL UNIT:               
Is audio signal sent from pins (2/IN4-L) and (4/IN4-R) of input ter-
minal J502?
NO
Check the connection to J502 and external devices.
YES
Is audio signal sent from pins (57/IN4-L) and (58/IN4-R) of 
IC1404?
NO
Check the line between J502 and IC1404.
YES
Refer to “No sound output in all modes”.
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