Sharp LC-60LE920UN Service Manual page 56

LC-52LE920UN/LC-60LE920UN
I .o audio 14) I
I INPUT-4 No audio IHDMI connected I
INPUT-5 No audio IHDMI connected I
INPUT-6 No audio IHDMI connected I
INPUT-7 No audio IHDMI connected I
[INPUT-4 input]
Is INPUT-4 selected on the input select menu screen?
[INPUT-5 input]
Is INPUT-5 selected on the input select menu screen?
[INPUT-6 input]
Is INPUT-6 selected on the input select menu screen?
[INPUT-7 input]
Is INPUT-7 selected on the input select menu screen?
_' NO
I Refer to ": No external input video [INPUT-4/5/6/7]".
YES
[INPUT-4 input]
If no video appears, refer to "No external input video (HDMI) [INPUT-4]".
[INPUT-5 input]
If no video appears, refer to "No external input video (HDMI) [INPUT-5]".
[INPUT-6 input]
If no video appears, refer to "No external input video (HDMI) [INPUT-6]".
[INPUT-7 input]
If no video appears, refer to "No external input video (HDMI) [INPUT-7]".
[ Is the audio output selected for "VARIABLE" on the menu screen? ]
_' NO
I Set the audio output to "FIXED".
i
YES
Does the digital audio signal come from pins (F28/F30/G28) (AUBCK/AULRCK/AOSDATA0) of IC3302
(CPU) to pin (8/9/7) (SP_BCLK/SP_LRCLK/SP_DATA) of IC2701 (Audio DSP)?
_" NO
Check the line between IC3302 and
IC2701, and their peripheral circuits.
YES
• About the L/R Speakers.
Does the digital audio signal come from pins (47/43/44/45) of
IC2701 (Audio DSP) to pin (5/8/7/6) of IC2703 (AMP for L/R)?
• About the Subwoofer speaker.
Does the digital audio signal come from pins (47/43/44/46) of
IC2701 (Audio DSP) to pin (5/8/7/6) of IC2702 (AMP for SW)?
_' YES
• About the L/R Speakers.
Is the audio output from IC2703 as specified?
• About the Subwoofer Speaker.
IS the audio output from IC2702 as specified?
_' Yes
• About the L!R Speakers.
Check the connector (P2701) L/R speakers and their periph-
eral circuits.
• About the Subwoofer Speaker.
Check the connector (P2702), subwoofer speaker and their
peripheral.
NO --_
NO --_
Check IC2701 and its peripheral circuits. (X2701, etc.).
• About the L/R Speakers.
Check IC2703 and its peripheral circuits.
• About the Subwoofer Speaker.
Check IC2702 and its peripheral circuits.
6-10