-84-
TROUBLESHOOTING GUIDE Appendix
2. NO PICTURE
Check the waveform of I101 #46
NG : GO to the figure c
OK : Go the figure d
TU01
TUNER
I701
MICOM
X702
32.768KHz
#10 #11 #12
ST-BY
5V
#29 #30
Check
the crystal
SDA SCL
5V
33V
IF OUT
Check
the voltages
#14 AFT
#29
#30
SDA
SCL
I101
SF101
SAW FILTER
#5 #6
#10
#8
#11
#12
Check
IF Vcc (5V)
Check
clock/data signal
Check
clock/data signal
#3
#4
Check
IF AGC voltage
Check
RF AGC voltage
#46
#44
Z501
4.5M Trap
Check
the waveform
c
I101
#44
I502
C502
Check
composite video
#18
Check
RBG Vcc (9V)
#19
#20
#21
Check
RBG signal output
T402
FBT
#13
Check
ABL current
#25
Check
HOR Vcc(5V)
#43
Check
CHROMA/VIDEO Vcc(5V)
D410
Check
200V LINE
R915,R916
Check
heater voltage
d
21V
-3V