LCD-71114KL Service inspection Manual Page 2 of 5
(2) Faulted Function
：
Not Audio Sound (Screen Picture is normal)
Checking Volume Level in Muting (Silent) Mode as below inspected process:
YES
NO
YES
NO
NO
YES
YES
NO
YES
NO
Check IC U13 (Pin-9 &
Pin-16) which have audio
output or not
Check IC U13 (Pin-5)
+12V power supply or
not
Check IC U13 (Pin-4
& Pin-6) audio signal
input or not
Check IC U12 near the
components of circuitry
Check IC U15(3\13)
pin has audio signal
output or not
Check
power
supply circuitry
Start
Check R132 and R136
and so on
Check IC U14 (Pin-50 &
Pin-54) near the components
of circuitry
Check Speaker, Soldering
or J111 Cable may be
damaged
Check if the main unit
is in MUTE Mode
Press the MUTE button
of remote control
