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TROUBLESHOOTING GUIDE
2-2) NO SOUND
Check the waveform of I501 #1
NG : GO to the figure
c
OK : GO to the figure
d
Check
Voltage
c
U102
TUNER
ICS01
TIMER/SYSCON
33V 5V
#65 #67
MDATA
MCLK
Check
Signal
I501
Z101
SAW FILT
IF OUT
#5 #6
#10
#10
AFT
#8
Check
IF Vcc(5V)
#71
#72
SCLKSDATA
#12
#11
Check
Signal
Check
AGC Voltage
#3
#54
#52
#35 #36 #38 #39
Check
the X-TAL
XS02
XCS01
#37
#34
Check
Reset
VCC
d
CC602
Check
Voltage
Check
AUDIO Signal
#4
I601
TDA7267A
Check
AUDIO OUT
C605
Check
FM filter
circuit
#9
Check
SIF Signal
If SIF no signal,
then change I501
#1
SOUND
12V
R604
C604
#3
#2
Check
Earphone
ICS01 #25
SOUND MUTE
H:Mute,L:Normal
QC601
C606
3W
8 OHM
Check
Mute
Insert:
No Sound