LG 42PB4DTH-UB / CHASIS / PA72A Service Manual ▷ View online
- 45 -
Check MSP4450K (IC201) inputs
#56(AV_L), #57(AV_R)
1
2
3
Check CXA2069 (IC1701) in/outputs
#2(V_L), #4(V_R), #23(FV_L), #25(FV_R),
#52(AV_L_OUT), #54(AV_R_OUT)
Check
Video/Front Video
Audio Input Cable
Check
Component 1,2 / RGB
Audio Input Cable
Check MSP4450K (IC201) inputs
#53(COMP1_L), #54(COMP1_R), #50(COMP2_L),
#51(COMP2_R), #47(RGB_L), #48(RGB_R)
AV/COMPONENT/RGB NO SOUND
Check MSP4450K (IC202) outputs
#36(SC1_R), #37(SC1_L)
4
5
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
6
7
Check MC33078(IC1001) in/outputs & Power
#8(9V), #2, 6(input), #1, 7(output)
8
Check Connector
P103(#16,#18)
9
- 46 -
HDMI NO SOUND
Main
Audio Processor
(MSP4450K)
PWM Modulator
(NSP2100A)
AMP
(TAS5122)
Front Speaker
Monitor Out
HD-2
HDMI
MST3361
System CPLD
(EPM570T144)
CS8415A
SPDIF Out
(Optical)
SPDIF
I2S
SPDIF
- 47 -
1
2
Check
HDMI
Cable
Check LGDT1102F(IC402) inputs
3
4
Check CS8415A(IC1006) in/outputs
#14(HDMI_SPDIF), #16(SCK), #17(LRCK),
#18(SPDIF_OUT), #10(SPDIF_CLK)
5
SPDIF BYPASS
CheckMST3361 (IC603) outputs
#125(HDMI_SPDIF_OUT)
HDMI NO SOUND
Follow the procedure of
COMMON SOUND OUT
Check EPM570T144 (IC301)
Check SPDIF out (R1035)
- 48 -
RECORD & PLAY NO SOUND
Main
Audio Processor
(MSP4450K)
Sub
Audio Processor
(MSP4458G)
PWM Modulator
(NSP2100A)
AMP
(TAS5122)
Front Speaker
AV
Front AV
Monitor Out
Buffer
(MC33078)
ADC
(CS5331A)
MUX CPLD
(EPM570F256)
NT Tuner
AT/NT Tuner
HD-2
PVR SOC
(LGDT1304P)
SiI
3512
Main
(LGDT3703)
HDD
System CPLD
(EPM570T144)
SPDIF Out
(Optical)
TP
I2S
I2S
L/R
I2S
TP
I2S
SPDIF
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