Hisense HX32N2170WTS Service Manual page 65

8. Audio Trouble(no sound)
NG
Repair external
audio equipment
1、 Check peripheral power
supply
2、check the power supply
Change software or
change MSD6486XTAT
Check if audio signal
Input is normal
NG
Check if the volume is rightly set or if
Set it rightly
Check if the output signal on the pin
1 & pin4 of CN10 is normal
NG Check pin15,16,27,28of UA1/
TPA3110LD2PWPR for the power
NG
Check the voltage (3.3V) on pin2 of
Check the signal output from pin
M5& M6 of MSD6486XTAT
Check if the audio signal
input to MSD6486XTAT
OK
mute function is off
OK
NG
supply(12V)
OK
UA1
OK
NG
is Ok
OK
Repair the
speaker
OK
Repair the circuit between
MSD6486XTAT and UA1