No Tuner Audio Output - LG RHT497H Service Manual

7. NO TUNER AUDIO OUTPUT

tu701 Pin17 (SiF) :
is there a signal?
yeS
ic901 Pin106, 107
is there a signal?
yeS
ic801 Pin40, 41 :
is there a signal?
yeS
ic901 Pin 98,
99, 100, 95 (ain_d0,
ain_Sclk, ain_FSync, ain_
Mclk) : is there
a signal?
yeS
when playing diSc,
no audio output
check
no
ic801 Pin14 (12v)
Pin30 (5, 3v) Pin31, 32
(Scl, Sda) :
check Pin51
no
/rSt_Saa7138
is there a signal?
x901 (24.576Mhz)
oscillated?
r906, r909
(Scl/Sda)
is there a signal?
ic901 defect
3-11
no
.
no
yeS
no
yeS
no
yeS
replace ic801
check reset from ic1101
change x901
check ic901 power
3.3v & 1.8v