LC-46XL2E (serv.man4). Troubleshooting Table - Sharp TV Service Manual (repair manual). Page 4

Read Sharp LC-46XL2E (serv.man4) Service Manual online

LC-42XL2E/S/RU, LC-46XL2E/S/RU, LC-46X20E/S/RU, LC-52XL2E/S/RU, LC-52X20E/S/RU
4 – 4
No sound from external input devices (2) 
                                            
Does not the sound of the audio signal input to EXT3 go out?
MINI AV_UNIT:                    
Is audio signal output from pin (5/IN3-L), (4/IN3-R) of input termi-
nal J901 to pin (3), (1) of connector P901?
NO
Check connection of between from J901 to P901 and the exter-
nal input device.
TERMINAL UNIT:                 
YES
Is audio signal input to pin (3/IN3-L), (1/IN3-R) of connector 
P501?
NO
Check the connector (P901/P501).
YES
Is audio signal input to pin (55/IN3-L), (56/IN3-R) of IC1404 
(CODEC)?
NO
Check the line between P501 and IC1404.
YES
Is CVBS signal detection signal V3_PLUG signal from pin (7) in 
input terminal J901 normal?
NO
Check the connection to J901 and external devices.
YES
Is V3_PLUG signal input to pin (2) of IC506 (VIDEO SELEC-
TOR)?
NO
Everything from V3_PLUG_LINE J901 to pin (2) of IC506 is 
checked. (connector P901/P501 and etc.)
YES
Refer to “No sound output in all modes”.
No sound from external input devices (3) 
                                            
Does not the sound of the audio signal input to EXT4/5/6 (HDMI) go out?
                                            
Is picture of the signal input from EXT4/5/6 displayed?
NO
Refer to “Does not the picture of the HDMI signal input to EXT4/
5/6 go out?”.
MAIN UNIT:                         
YES
Is the HDMI_SPDIF audio signal output from pin (W12) of 
IC3301 (VIDEO PROCESSOR) to pin (44) of connector 
SC1101?
NO
Check the line between IC3301 and SC1101, and their peripheral 
circuits.
TERMINAL UNIT:                
YES
Is HDMI_SPDIF audio signal input from pin (44) of connector 
SC501 to pin (5) of IC1404 (CODEC)?
NO
Check the line between SC501 and IC1404.
(SC1101/SC501, etc.)
YES
Refer to “No sound output in all modes”.

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