Sharp AQUOS LC-60EQ30U, Service Manual

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LC-60/70EQ30U
6 – 15
No monitor audio output
Is the audio output from the monitor set at "Variable" or "Fixed" on the menu screen?
YES
NO
Check IC3301(CPU) and its peripheral circuits.
Are there the audio signal outputs at pins (19)(AV_OUT_L) and (20)(AV_OUT_R) of IC3301 (CPU)?
YES
NO
Check the line between IC3301 and IC1703 and their peripheral circuits.
Are there the audio signal output at pins (2)(AV_OUT_L) and (9)(AV_OUT_R) of IC1703?
YES
NO
Check the line between IC1703 and J502 and their peripheral circuits.
Check the Cable and connected equipment condition.
No connect network
Does the signal come to 1pin of LAN-jack J509?
(see fig-1, fig-2) NO Check the interface device and peripheral circuits.
YES
Does the signal come to 28 pin of IC3301?
(see fig-2) NO Check the line between J509 and IC3301.
Check the LAN-jack J509
YES
Check IC3301 and its peripheral circuits.
J509