-38-
TROUBLESHOOTING GUIDE
Appendix
4. CH DON’T MEMORY or SKIP
(E)
Check The Iutput Signal Conditions
OK : Go To The Figure (E)
NG : Loss of Signal or Weak Signal
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
Z101
SAW FILTER
SIF
CHECK THE
VOLTAGE
#33
#22,43,45,63,80
#9,16,86,88
VIF
#28,29
I702
EEPROM
#5,6
#8
STB
CHECK THE
VOLTAGE
Summary of Contents for DTH-291F
Page 7: ... 6 CIRCUIT BLOCK DIAGRAM ...
Page 15: ... 14 IC DESCRIPTION 1 1 UOC III BLOCK DIAGRAM 1 UOC III SERIES ...
Page 16: ... 15 IC DESCRIPTION 1 2 UOC III FEATURES ...
Page 17: ... 16 IC DESCRIPTION ...
Page 18: ... 17 IC DESCRIPTION ...
Page 19: ... 18 IC DESCRIPTION ...
Page 27: ... 26 IC DESCRIPTION 2 ...
Page 28: ... 27 IC DESCRIPTION ...
Page 29: ... 28 IC DESCRIPTION 3 ...
Page 30: ... 29 IC DESCRIPTION 4 ...
Page 31: ... 30 IC DESCRIPTION ...
Page 36: ... 35 1 NO POWER TROUBLESHOOTING GUIDE Appendix ...
Page 58: ... 57 ...
Page 59: ... 58 ...
Page 60: ... 59 ...
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