No Sound - Daewoo DTH-14V1FS Service Manual

Troubleshooting Guide

3. NO SOUND

C heck audio output signal of I101 #1
e
33V
U102
TUNER
T-DATA T-CLOCK
#29 #30
I701
MICOM
#10 #11 #12
X701
32.768KHz
Check
the crystal
f
Check
Vcc of the sound AMP
R601
SOUND
12V
Audio in
Check
audio signal in
5V
IF OUT
AFT
#14
Check
IF Vcc (5V)
#27
SDA
#28
SCL
Check
ST-BY
clock/data signal
5V
#1
C602
#4
I601
C603
TDA7267A
NG : G o to the figure
O K : G o to the figure
SF101
SAW FILTER
#5 #6
#10
#8
I101
#11
#12
Check
FM filter circuit
Check
audio signal out
#2
C605
speaker
L:Mute / H:Normal
#3
C604
Q601




Check
IF AGC voltage
#3
Check
#52
SIF output signal
#54
If no signal,
then change I101
Check
SIF input signal
#9
5V
Check
Micom #40
Audio MUTE
H:Mute L:Normal