Audio (Bluetooth Mode); Audio (Wi-Fi Mode) - LG NP8350 Service Manual

ELECTRICAL TROUBLESHOOTING GUIDE

4. AUDIO (BLUETOOTH MODE)

AMP
Is the VCC of
IC700 pin2 13 V?
Is the Vdd of
IC700, IC801 3.3 V?
Check mode (Bluetooth)
Check 3.4 V.
(CN502 pin10)
Check UART signal.
(CN502 pin4, 6)
OK.

5. AUDIO (Wi-Fi MODE)

Check mode. (Wi-Fi)
Check AMP I2S signal.
(IC700 pin20, 21, 22)
Check PWM signal.
(IC700 pin1, 4, 33, 36)
Check audio signal.
(CN700)
OK.
YES
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
Replace Bluetooth module.
NO
NO
Replace IC700, IC801.
Check L702, L703, L04, L705
NO
and speaker cable connection.
3-10
Check power.
Check power.
Check power.
Replace IC700.