Samsung ST436WMX/GAP Service Manual page 36

Troubleshooting
6-2 Main Board Troubleshooting
6-2-1 No RF Signal
6-2-2 No Video Signal
6-2
Check ANT A or B
ANT = A (Wen CN105A RF-SW Port is Low.)
TM-Block Check (TU101S,TU102S)
TU(33V), B+)5V), AFT(2.5V), VIDEO(2.0V)
Check IC701(TA8851AN) Signal Input/Output
Pin50(Main), Pin53(Sub), PIn46(Output)
Check Video Input mode and IC701 Port
V1(Pin2), V2(Pin7), V3(Pin13),
S1(Y-Pin9,C-Pin11), S2(Y-Pin1, C-Pin17)
Check 3D-Comb in Video Mode
Check M701(3D-Comb MDL) Pin1 Input
Pin8(Y-OUT), PIn10(C-OUT)
Check
the Output from IC701(TA8851AN)
Y-OUT(Pin44), C-OUT(Pin42)
Check CN101A (Connector)
Check IC303(NJM2248D) Y-IN(Pin 1), Y-OUT(Pin7)
Check IC341(NJM2248D) C-IN(Pin 1), C-OUT(Pin7)
Check CN101A Pin13 (Main-C1), Pin15(Main-Y1)
Check the Power Supply
of 3D-Comb MDL PIN3(9V),
PIN7(5V), PIN5(SCL),
PIN6(SDA)
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