LG FFH-164, Manual

Page: 14 / 42

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Muting circuit (MUTE)
Dose “High” appear at
Q301, Q351“B”
check the “Low” of Q301,
Q351 “C”
MUTE
Check the “High” of CN203 PIN 12
Check the “High” of the IC601 Pin9
Replace the TR.
YES
YES
NO
NO
Audio abnormal
Check the output of
IC301 Pin8, 12
Check the connecting to
SPEAKER
Check the “High” of IC301 pin5
Check the input terminal of
Function
OK
Check the input of
IC301 Pin2, 4
Check the DC10V of IC201
pin24
Check the DC 12V Output of
IC204
Check the power
YES
YES
YES
YES
NO
NO
NO
NO