Denon AVR-X540BT Service Manual

5. Bluetooth / USB
[USB PCB : CN911 and BT module : BX8811] peripheral circuits are faulty.
Are [USB PCB : CN911 and BT module : BX8811]
correctly connected?
Can a voltage (3.3V) be conrmed 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 conrmed 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
62
Caution in
servicing
Electrical Mechanical Repair Information Updating

Denon AVR-X540BT Specifications

General

Channels	5.2
HDMI Inputs	5
HDMI Outputs	1
Bluetooth	Yes
4K Ultra HD Pass-through	Yes
Dolby TrueHD	Yes
DTS-HD Master Audio	Yes
Auto Speaker Calibration	No
Number of Power Amps	5
Output Power (6 ohm, 1 kHz, 0.7% 2ch Drive)	90 W
Output Power (6 ohm, 1 kHz, 10% 1ch Drive)	140 W
Composite In	2
Composite Out	1
Digital In: Optical	2
Analog In	2
Speaker Terminal: Screw	Yes
FM Tuner with RDS	Yes
3D Signal Pass-Through	Yes
Audio Return Channel	Yes
HDMI Standby Pass-Through	Yes
CEC	Yes
Auto Speaker Setup by Microphone	No
Dimensions (W x H x D)	434 x 151 x 319 mm
Weight	7.5 kg
Total Harmonic Distortion	0.08 %
Input Sensitivity/Impedance	200 mV / 47 kΩ
Signal-to-Noise Ratio	98 dB
Ethernet Port	No
Wi-Fi	No
Power Output per Channel	70W (8 ohms, 20Hz - 20kHz, 0.08% THD)
Frequency Response	10Hz - 100kHz
Supported Audio Formats	MP3, WMA, AAC