1
2
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
TDA7266S
#3, #13
#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
C681
SOUND
12V
C682
Audio L - in
Check
audio signal in
#2
C605
L out
Check
audio signal out
#6
Q601
Micom #40
Audio MUTE
H:Mute L:Normal
C683
Check
L:Mute / H:Normal
APPENDIX
TROUBLESHOOTING GUIDE
#12
C684
Audio R - in
C605
R out
earphone
#14
#1
#5
3-1. CN-220N CHASSIS
All manuals and user guides at all-guides.com
all-guides.com
