Denon AVR-X550BT 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
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.
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
Before Servicing
This Unit
Electrical Mechanical Repair Information Updating
64

Denon AVR-X550BT Specifications

General

Optical disc player type	-
Built-in HDD	No
Multichannel decoding	Yes
Audio decoders	Dolby Atmos, Dolby Surround, Dolby TrueHD
RMS rated power	130 W
Audio output channels	5.1 channels
Audio formats supported	AAC, FLAC, MP3, WMA
AM band range	522 - 1611 kHz
FM band range	58.5 - 1.8 MHz
Product color	Black
HDMI in	5
Composite video in	2
SCART ports quantity	0
Number of HDMI outputs	1
AC input voltage	230 V
AC input frequency	50 - 60 Hz
Power consumption (standby)	0.1 W
Package weight	Weight of the packaged product in gram.

Weight and Dimensions

Main unit weight	7257 g
Main unit dimensions (WxDxH)	431 x 304 x 127 mm