Sharp LC-32LE600E

LC-32/40/46LE600E/RU/S (1st Edition)
5 – 8
No sound from external input devices (2-2)-1
No sound from EXT3 (COMP-A-IN) connecting an external input
device.
<EXT3>
Is COMP_IN_L audio signal input to pin (2) of EXT3_AUDIO
(J502)?
Is COMP_IN_R audio signal input to pin (4) of EXT3_AUDIO
(J502)?
YES
Is COMP_IN_L audio signal input to pin (48) of IC1302 (A-SW)?
Is COMP_IN_R audio signal input to pin (47) of IC1302 (A-SW)?
YES
Is the audio signal (A_IN_L/R) properly output from pins (6) and
(7) of IC1302 (A-SW)?
NO Check S9V power supply (10) (15) pin, D3.3V power supply (3)
(36) pin, and SDA0/SCL0 signal pin (28) (27) of IC1302 (A-SW)
or the peripheral circuit.
YES
Is the audio signal (A_OUT_SP_L/R) properly output from pins
(H26) and (H25) of IC3303 (VCT)?
NO Check D3.3V power supply pin (F18) of IC3303 (VCT) and the
soldering confirmation or the peripheral circuit.
YES
It is the same as the above-mentioned A-BLOCK.
No sound from external input devices (2-2) -2
No sound from EXT4 (PC/HDMI-A-IN) connecting an external
input device.
<EXT4>
Is PC/HDMI-L audio signal input to pin (2) of EXT4 (J501)?
Is PC/HDMI-R audio signal input to pin (3) of EXT4 (J501)?
YES
Is PC/HDMI-L audio signal input to pin (50) of IC1302 (A-SW)?
Is PC/HDMI-R audio signal input to pin (49) of IC1302 (A-SW)?
YES
Is the audio signal (A_IN_L/R) properly output from pins (6) and
(7) of IC1302 (A-SW)?
NO Check S9V power supply (10) (15) pin, D3.3V power supply (3)
(36) pin, and SDA0/SCL0 signal pin (28) (27) of IC1302 (A-SW)
or the peripheral circuit.
YES
Is the audio signal (A_OUT_SP_L/R) properly output from pins
(H26) and (H25) of IC3303 (VCT)?
NO Check D3.3V power supply pin (F18) of IC3303 (VCT) and the
soldering confirmation or the peripheral circuit.
YES
It is the same as the above-mentioned A-BLOCK.