DAEWOO ELECTRONICS DTQ-14V1FC, Service Manual, Page: 24 / 44

2 23 3
T TROUBL ROUBLES ESHO HOO OT TING ING G GUIDE UIDE
3. NO SOUND 3. NO SOUND
Check a Check audio output si udio output signal of I101 #1 gnal of I101 #1
NG NG : Go : Go to the fi to the figure gure e e
OK OK : Go : Go to the fi to the figure gure f f
U102 U102
TUNER TUNER
I701 I701
MICOM MICOM
XC701 XC701
32.768KHz 32.768KHz
# #1 10 0 # #1 11 1 # #1 12 2
ST-BY ST-BY
5V 5V
# #2 29 9 # #3 30 0
Check Check
the crystal the crystal
T-DATA T-DATA T-CLOCK T-CLOCK
5V 5V 33V 33V
IF OUT IF OUT
#14 #14
AFT AFT
#27 #27
#28 #28
SDA SDA
SCL SCL
I101 I101
SF101 SF101
SAW FILTER SAW FILTER
# #5 5 # #6 6
#10 #10
#8 #8
#11 #11
#12 #12
Check Check
IF Vcc (5V) IF Vcc (5V)
Check Check
clock/data signal clock/data signal
#3 #3
Check Check
IF AGC voltage IF AGC voltage
e e
I601 I601
TDA7267A TDA7267A
#1 #1
#4 #4
f f
#52 #52
#54 #54
Check Check
SIF output signal SIF output signal
If no signal, If no signal,
then change I101
then change I101
Check Check
SIF input signal SIF input signal
#9 #9
5V 5V
Check Check
FM filter circuit FM filter circuit
Check Check
Vcc of the sound AMP Vcc of the sound AMP
R601 R601
C602 C602
SOUND SOUND
12V 12V
C603 C603
Audio Audio in in
Check Check
audio signal in audio signal in
#2 #2
C605 C605
speaker speaker
Check Check
audio signal out audio signal out
#3 #3
Q601 Q601
Micom #40 Micom #40
Audi Audio MUTE o MUTE
H:Mute L:Normal H:Mute L:Normal
C604 C604
Check Check
L:Mute / H:Normal L:Mute / H:Normal