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