No Audio - Rf; No Audio - Digital - LG 47LB1DA 1080p LCD Training Manual

TROUBLESHOOTING

NO AUDIO - RF

Check the Antenna connection
Check the NTSC Tuner's (TU1302)
#4(33v), #7(5V), #18(5V), #16(SoundIF)
LRCK:
48kHz
Check Connector P1611(#2)
Check MSP4450K (IC202) inputs
MCLK:
12.288MH
#67 (M_SIF)
Check MSP4450K (IC202) outputs
#36(SC1_R), #37(SC1_L)
Check connector
P103(#16,#18)
Check MC33078(IC1001) in/outputs & power
#8(9V), #2, 6(input), #1, #7(output)
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
R143(LRCH), R414(LRCK), R415(SCK)
Check the Antenna connection
Continue to the No Audio-General section
Check AT/NT Tuner (TU1300)
#3/11(5V), #24(IF_N), #23(IF_P)

NO AUDIO - DIGITAL

Check LGDT3703(IC1305) inputs
#22(IF_P), #23(IF_N)
Check LGDT3703(IC305) outputs
#44/45/47/49/50/52/54/55(VSB_DATA),
#57(ERROR), #59(VALID), #61(SOP), #62(CLK)
Check Mux CPLD (IC305)
Check LGDT1102F (IC402)
Continue to the No Audio-General section
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Directview LCD Training Troubleshooting