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TROUBLESHOOTING GUIDE
3. NO SOUND
Check audio output signal of I101 #1
NG : Go to the figure e
OK : Go to the figure f
U102
TUNER
I701
MICOM
XC701
32.768KHz
#10 #11 #12
ST-BY
5V
#29 #30
Check
the crystal
T-DATA
T-CLOCK
5V
33V
IF OUT
#14
AFT
#27
#28
SDA
SCL
I101
SF101
SAW FILTER
#5 #6
#10
#8
#11
#12
Check
IF Vcc (5V)
Check
clock/data signal
#3
Check
IF AGC voltage
e
I601
TDA7267A
#1
#4
f
#52
#54
Check
SIF output signal
If no signal,
then change I101
Check
SIF input signal
#9
5V
Check
FM filter circuit
Check
Vcc of the sound AMP
R601
C602
SOUND
12V
C603
Audio in
Check
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