Daewoo DTQ-20D5FSN Service Manual page 47

APPENDIX
TROUBLESHOOTING GUIDE
3-2. CN-220N CHASSIS
e
33V 5V
U102
TUNER
T-DATA T-CLOCK
#29 #30
I701
MICOM
#10 #11 #12
XC701
32.768KHz
Check
the crystal
f
Check
Vcc of the sound AMP
R601
SOUND
12V
C602
Audio - in
C603
Check
audio signal in
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IF OUT
AFT
#14
Check
IF Vcc (5V)
#27
SDA
#28
SCL
Check
ST-BY
clock/data signal
5V
#2
#1
#4
I601
TDA7267A
#6
SF101
SAW FILTER
#5 #6
#10 #3
#8
#52
#54
I101
#11
#12
#9
Check
FM filter circuit
Check
audio signal out
C605
SPEAKER
L:Mute / H:Normal
Micom #40
C604
Audio MUTE
Q601
H:Mute L:Normal
13
Check
IF AGC voltage
Check
SIF output signal
If no signal,
then change I101
Check
SIF input signal
5V
Check