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-31-
TROUBLESHOOTING GUIDE Appendix
2. NO PICTURE
(A)
(B)
Check The Waveform of TU101 IF PIN
OK : Go To The Figure (B)
NG : Go To The Figure (A)
TU101
TUNER
Z101
SAW FILTER
IF
SCL/SD
33V
5V
CHECK
THE
VOLTAGE
#7,8
I701
CHECK
CLOCK,DATA
#18,19
X701
24.576MHz
CHECK THE
CRYSTAL
5V
3.3V
#22,43,45,63,80
#9,16,86,88
CHECK THE
VOLTAGE
I701
#73
CHECK THE
HOUT
#83,84,85
CHECK THE
RGB OUT
#22,43,45,63,80
5V
3.3V
#9,16,86,88
CHECK THE
VOLTAGE
T402
FBT
D406
D405
CHECK THE
190V LINE
CHECK THE
HEATER
VOLTAG
E
Z101
SAW FILTER