5. Bluetooth / USB
The circuit around [USB PCB : CN911 and BT module : BX8811] is faulty.
Is [USB PCB : CN911 and BT module : BX8811] cor-
rectly connected?
Can a voltage (3.3V) be conrmed between pin 1
and pin 1 of [CN911] on USB PCB?
Are there other Bluetooth devices on close by?
Is the Bluetooth device supported by this unit?
Connect the connectors correctly.
The circuit around [Q7510] of the DIGITAL PCB is
faulty.
Turn off other Bluetooth devices.
This unit supports devices with A2DP support.
Checking the unit
Check the Bluetooth device being used
NO
NO
NO
NO
YES
YES
YES
YES
Check the USB device being used
Is the USB device supported by this unit?
Is a USB hub being used?
This unit supports devices in the FAT16- and
FAT32-formatted mass storage class, MTP-com-
patible devices and iPod devices (except for some
models).
Do not use a USB hub.
Checking the unit
Can a voltage (5V) be conrmed between [JK91 :
1-4pin] (USB Connector) on USB PCB?
The USB signal circuit from [IC901] to [JK91] on the USB PCB are faulty.
Are [BN912 and BN914] correctly connected?
The circuit around [IC905] of the DIGITAL PCB is
faulty.
Connect the connectors correctly.
5.2. Cannot recognize the connected USB device5.1. Cannot establish a Bluetooth connection
NO
YES
YES
YES
YES
NO
NO
NO
Before Servicing
This Unit
Electrical Mechanical Repair Information Updating
68
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