No external input 1 audio
Audio output NO
even when playing DISC< When playing DISC, no audio output > Check
YES
IC808,809 (AUDIO SWITCH)
IC808,809 - 7NO
Check power and switching operation
Check audio signal output
Pin 2,4 High/Low =>Pin 7 output :
SW_A_OUT_L/R
YES
IC7808,809-5NOCheck IC808,809 signal flow and
Check audio signal input
power
YES
IC804 - 23,27NOIC804 - 9:LOW?
NOIC804 - 32,33
Check audio signal outputHIGH: AUDIO MUTE
Check I2C signal flow
YESYES
NO
IC804 - 32,33
Q803 2(Emitter ) Hihg?
Check signal flow
YES
IC702 - 46
LOW:AUDIO MUTE
IC804 - 10,16NOJK803 - 2 ,6
Check audio signal input
Check input
YES
END
3-8 |
ACEC
LG-GOLDSTAR
