Audio Check - LG HT806TGW Service Manual

ELECTRICAL TROUBLESHOOTING GUIDE
4. NO AUDIO CHECK
CD/DVD Disc
or USB play.
YES
IC602
pin4, 5, 6, 7, 8
A
I2S input signal
ok?
YES
IC602
pin33, 34, 36, 37, 38, 39,
41, 42 PWM output
signal ok?
YES
IC701,
702, 703
pin4, 5, 10, 11 PWM
input signal
ok?
YES
IC701,
702, 703 pin28, 29, 36,
37, 44, 45, 52, 53 PWM
audio signal
output ok?
YES
Check AMP IC output
stage and JK701.
AUX function.
YES
IC200
pin7, 8
B
audio L/R
ok?
YES
IC200
pin42, 43, 44 I2S
clock ok?
YES
IC200
pin41 I2S output
signal ok?
YES
A
NO
Check IC500.
NO
Check IC602.
NO
Check IC602.
NO
Check IC701, 702, 703.
NO
Check JK301.
NO
Check IC500 and
X500.
NO
Check IC200.
2-43
Portable function.
YES
IC200
NO
pin21, 22
audio L/R
ok?
YES
B
Tuner function.
YES
TU100
NO
pin1, 3
audio L/R
ok?
YES
IC200
NO
pin23, 24
audio L/R
ok?
YES
B
Check JK2D4.
Check TU100.
Check JK2D4.