Sharp LC-37SD1E, Руководство по обслуживанию

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LC-37SA1E/RU
4 – 5
No sound from external input devices (2)
No sound from EXT5 (AUDIO) connecting an external input
device.
<EXT5>
Is HDMI-L audio signal sent from J2701 to pin (14) of IC2704?
Is HDMI-R audio signal sent from J2701 to pin (5) of IC2704?
YES
Is HDMI-L audio signal sent to pin (10) of IC3002?
Is HDMI-R audio signal sent to pin (9) of IC3002? NO Check output of pins (13) and (3) of IC2704 and peripheral
circuits.
YES
Check that Option-HDMI Setup-Audio select is set to “Analog”.
OK
Is the audio signal properly sent from pins (28) and (27) of
IC3002? NO Check IC3002 or peripheral circuits.
YES
Is the audio signal of pins (1) and (7) of IC303 (OP-AMP) sent
properly? NO Check IC303 or peripheral circuits.
YES
Is the audio output signal of pins (13) and (16) of IC302/IC301
(MAIN-AMP) normal? NO Check IC302/IC301 (MAIN-AMP), HEADPHONE and peripheral
circuits.
YES
Check CONNECTOR (P301) and Speaker (right and left).
No sound except from speakers (3)
No audio output from the headphones.
Is there audio output on pins (2) and (3) of the headphone
terminal (J1301)?
NO
Is audio input/output signal of pins (3) and (5)/(1) and (7) of IC303
(OP-AMP) normal?
NO
Is audio output signal (SPK-OUT L/R) properly sent from pins
(28) and (27) of IC3002 (VCT)?
NO
Check audio input signal of pin (31) of IC3002 (VCT), pins (18)
and (33) of the power line, pins (84) and (83) of I2C-LINE, and
peripheral circuits.