Sharp LC-32AX5H Service Manual page 28

LC-32AX5H/M/X
No audio heard (5)
No HDMI sound heard.(INPUT 3 is digital audio.)
Does the HDMI image appear onscreen?
No audio output from INPUT 3.
Are waveforms of the pins (120) - (124) of IC8702 output
normally?
Are output waveforms of the audio output pins B23 and D23 of
IC801 normal?
Are audio signals of L-ch and R-ch input in to the pins (53) and
(54) for volume, equalizer and sound of IC1301 normally and
output from the pins (28) and (27) normally?
Are there the L-ch and R-ch audio signal outputs at pins (20),
(21) and (40), (41) of IC1303 (AMP), respectively?
Are there the L-ch and R-ch audio signal inputs at pins (1), (2)
and (3), (4) of P5007, respectively?
No audio heard (6)
No sound from the HDMI sound input terminal.
(INPUT 3 analog audio)
Is there the L-ch audio signal input from pin (4) of external input
terminal J3401 (HDMI AUDIO IN) to pin (47) of IC1301?
Is there the R-ch audio signal input from pin (2) of external input
terminal J3401 (HDMI AUDIO IN) to pin (48) of IC1301?
Are audio signals of L-ch and R-ch of IC1301 normally and out-
put from the pins (28) and (27) normally?
Are there the L-ch and R-ch audio signal outputs at pins (20),
(21) and (40), (41) of IC1303 (AMP), respectively?
Are there the L-ch and R-ch audio signal inputs at pins (1), (2)
and (3), (4) of P5007, respectively?
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
NO Refer to "<INPUT 3> in No external image onscreen (HDMI)".
NO Check if the EDID data of IC404 (INPUT 3) is normal.
Check peripheral circuits of IC404.
NO Check peripheral circuits of IC8702.
NO Check peripheral circuits of IC801.
NO Check peripheral circuits of IC1301.
NO Check IC1303 and its peripheral circuits.
NO Check peripheral circuits of IC1301.
NO Check IC1303 and its peripheral circuits.
6 – 6
YES