LG 32LG710H (CHASSIS:LA95A) Service Manual ▷ View online
HDMI Audio(in) Trouble shooting guide
Check input connect JK201,JK202
Can you see the normal waveform?
Can you see the normal waveform?
JK201,JK202 may have problem. Replace this Jack.
Check HDCP communication lines(IC100)
After checking the Power of this chip, you should decide to replace this or not.
YES
NO
NO
Audio out Trouble shooting guide
Check the output (Pin AD20,AF21,AE20) of BCM3549(IC100).
Measure waveform at R1148,R1147,R1146
because it’s more easy to check. Can you see the normal signal?
Measure waveform at R1148,R1147,R1146
because it’s more easy to check. Can you see the normal signal?
Check the input (Pin 17,18,19) of NTP3100((IC301).
Can you see the normal waveform?
Can you see the normal waveform?
YES
NO
NO
This board has big problem because Main chip(BCM3549) have some troubles.
After checking thoroughly all path once again,
You should decide to replace BCM3549 or not.
After checking thoroughly all path once again,
You should decide to replace BCM3549 or not.
After checking audio signal line, you should decide to replace item or not.
YES
Check the output (Pin 30,31,36,37,47,48,53,54) of NTP3100((IC301).
Can you see the normal waveform?
Can you see the normal waveform?
NO
YES
After checking the Power & I2C & Reset of this chip,
you should decide to replace this or not.
you should decide to replace this or not.
Check the speaker output wafer P300.
Can you see the normal waveform?
Can you see the normal waveform?
NO
YES
After checking audio signal line, you should decide to replace item or not.
Check the connector & Speaker
SPDIF Audio out Trouble shooting guide
Check the output (Pin AF5) of BCM3549(IC100).
Measure waveform at R680 because it’s more easy to check.
Can you see the normal signal?
Measure waveform at R680 because it’s more easy to check.
Can you see the normal signal?
Check the input of JK300.
Can you see the normal waveform?
Can you see the normal waveform?
YES
NO
NO
This board has big problem because Main chip(BCM3549) have some troubles.
After checking thoroughly all path once again, You should decide to replace BCM3549 or not.
After checking thoroughly all path once again, You should decide to replace BCM3549 or not.
After checking audio signal line, you should decide to replace item or not.
YES
After checking the Jack, you should decide to replace item or not.
SPDIF Audio out Trouble shooting guide
Check the output (Pin AF5) of BCM3549(IC100).
Measure waveform at R680 because it’s more easy to check.
Can you see the normal signal?
Measure waveform at R680 because it’s more easy to check.
Can you see the normal signal?
Check the input of JK300.
Can you see the normal waveform?
Can you see the normal waveform?
YES
NO
NO
This board has big problem because Main chip(BCM3549) have some troubles.
After checking thoroughly all path once again, You should decide to replace BCM3549 or not.
After checking thoroughly all path once again, You should decide to replace BCM3549 or not.
After checking audio signal line, you should decide to replace item or not.
YES
After checking the Jack, you should decide to replace item or not.