Read LG 19LV2300 (CHASSIS:LA86D) Service Manual online
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Check JK701, JK707, JK700, JK702, JK703.
Can you see the normal waveform? Refer to
figure 1
JK701, JK707, JK700, JK702, JK703 may have
problem. Replace this Jack.
AV/Component/RGB_PC-Audio(In)
YES
NO
Check the input (Pin AIN6A, AIN6B, AIN1A,
AIN1B, AIN3A, AIN3B, AIN4A, AIN4B, AIN2A,
AIN2B) of CS5345(IC500).
Can you see the normal waveform? Refer to
figure 2
After checking audio signal line, you should
decide to replace item or not.
YES
NO
Check the Output (Pin SDOUT(41), SCLK(42),
LRCK(43)) of CS5345(IC500).
Can you see the normal waveform? Refer to
figure 3/4/5
After checking the Power & MLCK & reset of this
chip, you should decide to replace this or not.
NO
YES
Check the input (Pin AH24,AJ24,AK24) of
BCM3553((IC100).
Measure waveform at R561,R554,R555 because
it
’s more easy to check.
Can you see the normal waveform? Refer to
figure 3/4/5
After checking audio signal line, you should
decide to replace item or not.
NO
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
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