Daewoo CN-071, Service Manual

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20
TROUBLESHOOTING GUIDE
2-3) CHANNEL DON’T STOP
Check the input signal conditions.
NG : Loss of signal or weak signal
OK : GO to the figure e
Check
Voltage
e
U102
TUNER
ICS01
TIMER/SYSCON
33V 5V
#65 #67
MDATA
MCLK
I501
Z101
SAW FILT
IF OUT
#5 #6
#10
#10
AFT
#8
Check
IF Vcc(5V)
#71
#72
SCLK SDATA
#12
#11
Check
Signal
Check
AGC Voltage
#3
#48
#49
#35 #36 #38 #39
Check
the X-TAL
XS02
XCS01
#37
#34
VCC
Check
VCO COIL
#10
AGC IN
CC116
L110
VCO COIL
#56
#40
Caption CVS
Check Waveform
CVS 2Vp-p
Reset
IS02
EEPROM
#6
#5
#8
VCC
Check
SDA/SCL