59
1
3
4
1
3
4
C
D
F
A
B
E
TS7, BCT-1710, BCT-1720, BCT-1730
((D1))
(from page 58)
[LNB Power Check Routine]
↓
<In the "main.exe" Window, push F5 key>
<Correctly overlayed onto 13V or 18V?>
[Execute "No.5 : Tuner Check" operation.]
[Execute any "Set parameter" operation.]
(In the "main.exe" Window, push f1 key then f9 key.)
↓
[Examine M1001(LNB POWER (RF INPUT).]
↓
<13V(12.5V~14V) or 18V (17V~19V) ?>
<13V and 18V are switched correctly?>
YES
YES
NO
[Replace IC1004(STV0299B).]
NO
<IC1001(KA317MRTM Voltage Regulator)
Pin 3 (VIN) : available?>
NO
NO
((A))
(to page 55)
<IC1001(KA317MRTM Voltage Regulator)
output : 13V or 18V?>
<LNB_Off/On at Q1008 Base: 0.7V?>
[Replace Q1008 or Q1011]
YES
NO
<Over-current sensing: OK?
(Around Q1002)
[Add solder to
R1009-R1013/R1033.]
[Replace IC1001.]
[RF incoming signal is
faulty.(Antenna line
seems to have a short
path to the ground.]
YES
NO
YES
[IC1001(KA317MRTM Voltage Regulator)
Pin 2 (VOUT) and Pin 1 (ADJ)]
<IC1001 : voltage difference (Vout-Vadj): 1.25V?>
YES
NO
[Replace POWER SUPPLY ASSY.]
NO
<A+22V or 17V input available?>
[Replace IC1004(STV0299B).]
NO
<LNB_V_H at Q1004 Pin5 : High?>
YES
[Replace Q1004]
YES
[Replace Q1003]
NO
[Replace IC1004(STV0299B).]
NO
<22kHz available
at IC1004 Pin 16?>
YES
[Examine 22kHz (High Band/ Low Band switching signal.]
YES
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