When Playing Disc, No Audio Output - LG RHT497H Service Manual

5. WHEN PLAYING DISC, NO AUDIO OUTPUT

check q801,q808,
q809,q810
check
ic802 Pin8
(Sw_12vG)
yeS
replace ic802
when playing diSc, no audio output
ic803
Pin14,15 :
is there a
signal?
yeS
ic803 Pin1,16
no
(Z_Mute_r/l) :
ic701 Pin24
(Sys_Mute_l) :
yeS
no
ic802 Pin1,7
is there a signal
yeS
ic801
Pin34,35,37,38 :
is there a signal?
yeS
l806, l826,l810,l825
is there a signal ?
yeS
check
cable connections &
tv audio mute
check
ic803
no
Pin5,6,7,8 :
Pin3,4 (host clk
&data) :
yeS
check
.
ic803 Pin11 (5.0vd)
yeS
replace ic803
check ic801
no
Pin14 (12v) Pin30 (5.3v)
Pin31,32 (Scl,Sda) :
3-9
no
ic1101
.
defect
no
replace
ic801