Sharp LC-70EQ10U Service Manual page 106

LC-60/70EQ10U,SQ10U/15U/17U,TQ15U,UQ17U
[HDMI1 input]
Is INPUT-1 selected on the input select menu screen?
[HDMI2 input]
Is INPUT-2 selected on the input select menu screen?
[HDMI3 input]
Is INPUT-3 selected on the input select menu screen?
[HDMI4 input]
Is INPUT-4 selected on the input select menu screen?
YES
[HDMI1 input]
If no video appears, refer to "No external input video (HDMI) [HDMI1]".
[HDMI2 input]
If no video appears, refer to "No external input video (HDMI) [HDMI2]".
[HDMI3 input]
If no video appears, refer to "No external input video (HDMI) [HDMI3]".
[HDMI4 input]
If no video appears, refer to "No external input video (HDMI) [HDMI4]".
Is the audio output selected for "VARIABLE" on the menu screen?
YES
Does the digital audio signal come from pins(AR11/AP11/AN9)(CPU_AOBCK/AOLRCK/AOSDATA0) of IC3301(CPU) to pins(8/9/7)(SP_BCLK/
SP_LRCLK/SP_DATA) of IC1702(Audio DSP)?
YES
• About the L/R Speakers.
Does the digital audio signal come from pins (27/29/32/34) of IC1702 (Audio DSP) to pin (4/3/2/1) of IC1903 (connector for L/R)?
YES
• About the L/R Speakers.
Check the connector (P1903) L/R speakers and their peripheral circuits.
No audio (4)
HDMI1 No audio (HDMI connected)
HDMI2 No audio (HDMI connected)
HDMI3 No audio (HDMI connected)
HDMI4 No audio (HDMI connected)
NO
Refer to ": No external input video [HDMI1/2/3/4]".
NO
Set the audio output to "FIXED".
NO
Check the line between IC3301 and IC1702 and their peripheral circuits.
NO
Check IC1702 and its paripheral circuits.(X1701, etc.)
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