LG 37LN549E / 37LP63 H (CHASSIS:LD3AF) Service Manual ▷ View online
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4. Component Video
5. RGB Video (LN549E Only)
Make sure the input signal type and
our TV can support the signal.
Make sure the input signal type and
Our TV can support the signal.
Check Component cable(gender)
defect or status of conductor
Check the RGB cable defect or
status of conductor.
Make sure the LVDS output signal of
Mstar IC.
Check the DSUB_DET signal.
Check the LVDS output signal of
Mstar IC.
Make sure the JK1603, COMP Y/Pb/
Pr signal
Check the EDID, I2C signal.
Make sure the Rear_COMP_DET
signal.
Check the JK1104 H / V_Sync / R /
G / B signal.
Exchange the Mstar(IC101)
or Main board.
Exchange the resistor R1146 / R1147.
Exchange the Mstar(IC101) or Main
board.
Exchange Component Jack.
Download the EDID data, exchange
the Mstar(IC101) or Main board.
Exchange the R9912.
Exchange the D-SUB Jack.
No
No
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
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6. HDMI Video
Make sure the input signal type and
Our TV can support the signal.
Check the HDMI cable defect or
status of conductor.
Check the HDMI_DET(HPD) signal.
Check the HDMI signal.
Check the LVDS output signal of
Mstar IC.
Check the EDID, I2C signal
R884 ~ R891
Check the HDMI Jack.
JK801, JK802, JK803
Exchange the Resistor.
R810, R811, R823
Exchange the Mstar(IC101) or Main
board.
Exchange the Mstar(IC101) or Main
board.
Exchange the IC or download the
EDID data.
Exchange the HDMI Jack.
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
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7. Audio of All input
Check the Mstar Audio_Master_CLK signal.
R148
Check the Audio output signal.
IC501 1, 2, 3, 4pin
Check the AMP I2C Line.
R140, R141
Check the connector P501.
Check the Mstar I2S output.
IC501 9, 10, 11pin
Check the Speaker resistor or connector.
Check the speaker menu.
(menu -> sound -> TV speaker)
Check the voltage of AMP IC(IC501).
24V, 3.3V
Exchange the Mstar(IC101) or Main
board.
Exchange the Audio AMP.
IC501
Check the I2C signal or exchange the
Mstar(IC101).
Exchange the connector If
the connector is defect.
Check the I2C signal or
Exchange the Mstar(IC101).
Exchange the speaker.
Menu toggle
Exchange the AMP IC or Main board.
No
No
No
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
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8. TV Audio
Check the voltage of Tuner 1.8V
IC2603 2pin : 1.8V
Check the IF_P/N signal TU2601~3
10/11pin
Implement the “7. Audio of all input”
Of Malfunction guide.
Check the RF cable of RF signal
Check the voltage of Tuner 3.3V : L2606
Exchange the L2606.
Exchange the Tuner.
Menu toggle
Exchange the L2606.
No
No
No
No
Yes
Yes
Yes
Yes
9. AUDIO IN (Component/DVI Audio) (PC Audio:LN549E Only)
Implement the “7. Audio of all input”
Of Malfunction guide.
Check the cable is defective.
Check the signal of JK1102.
Exchange AUDIO IN Jack.
No
Yes
Yes
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