Read LG 19LV2300 (CHASSIS:LA86D) Service Manual online
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Check the output (Pin AL25,AJ25,AK25) of
BCM355x(IC100).
Measure waveform at R2636,R2637,R2635 because
it
’s more easy to check.
Can you see the normal signal? Refer to figure 1
Check the input (Pin 17,18,19) of NTP3000
((IC501). Can you see the normal waveform?
Refer to figure 1
Check the speaker output wafer P501.
Can you see the normal waveform?
Refer to figure 3
Check the connector & Speaker
Replace IC100
Speaker-Audio(Out)
YES
YES
YES
YES
Figure 1
Figure 2
Figure 3
NO
AL25 of IC100 / 17 of IC501
AK25 of IC100 / 19 of IC501
AJ25 of IC100 / 18 of IC501
Replace IC501
NO
Check the output
(Pin30,31,36,37,47,48,53,54)
of NTP3000((IC501).
Can you see the normal waveform? Refer to
figure 2
Replace IC501
NO
If P501 is damaged
replace P501
NO
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