No external input 2 audio
Audio output NO
< No audio output when playing DISC > Check
even when playing DISC
YES
IC808,809 (AUDIO SWITCH)
IC808,809 - 7NO
Check power and switching operation
Check audio signal outputPin 2,4 High/Low =>Pin 7 output :
SW_A_OUT_L/R
YES
IC7808,809-5NO
Check IC808,809 signal flow
Check audio signal inputand power
YES
IC804 - 23,27NOIC804 � 9:LOW?NOIC804 - 32,33
Check audio signal outputHIGH: AUDIO MUTECheck I2C signal flow
YESYES
NOIC804 - 32,33
Q803 2(Emitter ) Hihg?
Check signal flow
YES
IC702 - 46
LOW:AUDIO MUTE
NO
IC804 � 8,14JK803 � 23,27
Check audio signal inputCheck input
YES
END
3-9 |
ACEC
