Denon AVR-X540BT Service Manual

4.2. Power AMP (MAIN PCB)
No audio output.
Protection is activated.
Is the power transistor open or short circuited?
2SB1560 / 2SD2390
Is the emitter resistor of the power transistor
open?
0.47 Ω
Is the base resistor of the power transistor open?
4.7 Ω
Is the trimmer potentiometer between the base of
the power transistor open?
1 k Ω
Are any other transistors faulty?
Are any other resistors faulty?
Turn on the power and, check that the voltage of each part is correct and that there is an idling current.
Replace the power transistor.
Replace the transistor.
Replace the resistor.
Replace the emitter resistor.
Replace the base resistor.
Replace the trimmer potentiometers.
YES
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO
61
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