Pairing Bluetooth; Key/ Led - LG NP7550 Service Manual

ELECTRICAL TROUBLESHOOTING GUIDE

4. PAIRING BLUETOOTH

Pairing Bluetooth.
Check the connection of FFC.
Is voltage of L500 3.4 V?
Is BT_RST HIGH?
(R504)
Replace Bluetooth module.

5. KEY/ LED

Key, LED
Is input voltage 3.4 VA?
(L501)
Is control HIGH?
(KEY: R542, 515, 524, 535)
(LED: Pin3 of Q500 ~ 507)
OK
NO
YES
NO
YES
NO
YES
If it still doesn't work
NO
YES
NO
YES
Check DSP (Replace IC501).
3-10
Connect FFC.
Check power.
Check DSP.
Check DSP.
Check power.