Daewoo DTQ-26S3FC, Service Manual, Page: 41 / 45

16
TROUBLESHOOTING GUIDE
3. 2 NO SOUND(DTQ-26S3FCM)
Check audio output signal of I101 #1
NG : Go to the figure g
OK : Go to the figure h
U102
TUNER
I701
MICOM
X701
32.768KHz
#10 #11 #12
ST-BY
5V
#29 #30
Check
the crystal
T-DATA T-CLOCK
5V
33V
IF OUT
#14
AFT
I101
SF101
SAW FILTER
#5 #6
#10
#8
#11
#12
Check
IF Vcc (5V)
Check
clock/data signal
#3
Check
IF AGC voltage
g
I602
TDA7267A
#1
#4
#1
Check
Audio out
#9
5V
Check
FM filter circuit
Check
Vcc of the sound AMP
C602
SOUND
14V
C606
Audio in
Check
audio signal in
#2
C608
speaker
Check
audio signal out
#3
Q601
Micom #40
Audio MUTE
H:Mute L:Normal
C607
Check
L:Mute / H:Normal
SDA
SCL
FROM I701
h
Appendix