Sharp LC52LE600E Manual page 29

L C - 3 2 / 4 0 /4 6 L E 6 0 0 E / R U / S
No DIGITAL sound from OPT OUT (D520).
Is the DIGITAL audio signal output to pin (1) of the OPT OUT ter-
minal (D520)?
Is the DIGITAL audio signal (OPT_ OUT) output from pin (4) of
IC503?
Isn't the AUDIO_MUTE signal inputted into pin (1) of IC503 by
"L"?
Is the DIGITAL audio signal (OPT_ OUT) output from pin (E26) of
IC3303 (VCT) normally?
Isn't there problem in the power supply input (D3.3V, D1.1V) of
IC3303 (VCT), I2C_0 signal (SDA0/SCL0), and defective solder-
ing, etc.?
Where is the input source of the sound from?
(TUNER, EXT5, EXT6, EXT7)
Check whether there is any problem in each input (terminal).
No sound of external device (3-3)
NO
NO
NO
NO
YES
YES Check OPT OUT terminal (D520) and the connection to an exter-
nal device.
YES Check whether it is normal between an OPT OUT terminal
(D520) and IC503.
YES The pin (1) of IC503 should usually be "H". If it is "L" signal,
check Q505, pin (1) of Q1301 and pin (35) of IC1302.
YES Check whether it is normal between IC503 and IC3303.
NO Repair the faulty point around IC3303.
TU1102: TUNER
Check pin (T25) (R25) of IC3303, and pin (16) (17) of TUNER.
EXT5: HDMI_1
Check the TMDS input signal of HDMI_1 (1) (9) pin, the TMDS I/
O signal of IC1508, and the TMDS input signal of IC3303.
EXT6: HDMI_2
Check the TMDS input signal of HDMI_2 (1) (9) pin, the TMDS I/
O signal of IC1508, and the TMDS input signal of IC3303.
EXT7: HDMI_3
Check the TMDS input signal of HDMI_3 (1) (9) pin, the TMDS I/
O signal of IC1508, and the TMDS input signal of IC3303.
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