Daewoo DTQ-29S3FC, Service Manual, Page: 40 / 45

15
3.1 NO SOUND(DTQ-29S3FC/DTQ-26S3FC)
Check audio output signal of I601 #24 #25
NG : Go to the figure e
OK : Go to the figure f
I701
MICOM
X701
32.768KHz
#10 #11
#29 #30
Check
the crystal
TUNER
#28
I101
SF101
SAW FILTER
#5 #6
#11
#12
Check
#3
Check
IF AGC voltage
#46
Check
The video signal
#38
the crystal
the crystal
TO MSP
SOUND IC.
SDA
SCL
FROM
I701
X601 18.432MHz
Check
Check
Check
Check
the SIF INPUT
the sound signal out
The reset
The SDA/SCL
I603
MSP3435G
SDA SCL
FROM
I701
#51 #52
#47 #24
#25
#20
#7 #8
e
I602
TDA7267A
#1
#4
Check
Vcc of the sound AMP
C602
SOUND
12V
C606
L sound 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
SCL
SDA
RESET
#27
R.OUT
L.OUT
I601
TDA7267A
#1
#4
Vcc of the sound AMP
audio signal in
#2
C605
speaker
Check
audio signal out
#3
Q601
Micom #40
Audio MUTE
H:Mute L:Normal
C604
Check
L:Mute / H:Normal
Check
C602
SOUND
12V
C603
L sound in
Check
f
: R, SOUND CHECK
: L, SOUND CHECK
TROUBLESHOOTING GUIDE
Appendix