Audio out Trouble shooting guide
Check the output of Mstar(IC101).
Measure waveform at R503, R504, R505.
because it’s more easy to check. Can you see the normal signal?
Check the input (Pin 17,18,19) of NTP7100(IC501).
Can you see the normal waveform?
YES
NO
NO
This board has big problem because Main chip (MStar) have some troubles.
After checking thoroughly all path once again,
You should decide to replace Mstar 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 NTP7100((IC501).
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.
Check the speaker output wafer P501.
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
Copyright ⓒ 2011 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Summary of Contents for 32LD310H
Page 41: ......
