LG 42LB1DRA Service Manual - Page 44

Check CS5331IC1000 in/outputs & Power

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Page 44 highlights

- 44 - • TV RF NO Sound 1 Check An tenna Cable Check N TSC Tuner (TU1302) 2 #4(33V), #7,18(5V), #16(SIF) Check C onnecto r 3 P1611(#2) Check M SP4450K (IC202) inputs 4 #67(M_SIF) Check M SP4450K (IC202) outpu ts 5 #36(SC1_R), #37(SC1_L) Check C onnecto r 6 P103(#16,#18) Check M C33078(IC1001) in/outpu ts & Power 7 #8(9V), #2, 6(in pu t), #1, 7(output) Check C S5331(IC1000) in/outputs & Power 8 #7(5V), #5,8(L/R input), #1(LRCH), #2(SCK), #3(LRCK), # 4(MCLK) Check LG DT1102F(IC402) inputs 9 R413(LRCH), R414(LRCK), R415(SCK) 10 Fol lo w the pr ocedur e of " COMMON SOUND OUT" #36 (SCI_R), 37 (SCI_L) : Not "0" Vol tage Level, Analog si gnal #4 (MCLK) : #3 (LRCK) : #1 (LRCH) : Not "0" Volt age Level 12.288MHz 48KHz

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- 44 -
Check MSP4450K (IC202) inputs
#67(M_SIF)
Check MSP4450K (IC202) outputs
#36(SC1_R), #37(SC1_L)
Check Connector
P1611(#2)
1
2
3
4
5
6
Check CS5331(IC1000) in/outputs & Power
#7(5V), #5,8(L/R input), #1(LRCH), #2(SCK),
#3(LRCK), #4(MCLK)
Check LGDT1102F(IC402) inputs
R413(LRCH), R414(LRCK), R415(SCK)
Follow the procedure of
“
COMMON SOUND OUT
”
7
8
Check NTSC Tuner (TU1302)
#4(33V), #7,18(5V), #16(SIF)
Check
Antenna
Cable
Check MC33078(IC1001) in/outputs & Power
#8(9V), #2, 6(input), #1, 7(output)
9
#4 (MCLK) :
12.288MHz
#3 (LRCK) :
48KHz
#1 (LRCH) : Not
“
0
”
Voltage Level
#36 (SCI_R), 37 (SCI_L) : Not
“
0
”
Voltage Level, Analog signal
Check Connector
P103(#16,#18)
10
•
TV RF NO Sound