Denon AVR-X1200W Service Manual

4.2.PowerAMP(AMPPCB)
No audio output.
Protection is activated.
Is the power transistor open or short cir-
cuited?
2SB1560/2SD2390
Is the emitter resistor of the power transis-
tor 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?
1k 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
NO
NO
NO
NO
NO
NO
YES
79

Denon AVR-X1200W Specifications

General

HDMI in	6
AC (power) in	Yes
Composite video in	2
USB ports quantity	1
Digital audio coaxial in	0
Receiver type	-
Audio output channels	7.2 channels
Total Harmonic Distortion (THD)	1 %
Power output per channel (20-20KHz@8 Ohm)	145 W
FM band range	87.5 - 108 MHz
Supported radio bands	AM, FM
Internet radio services supported	Spotify
Product color	Black
Audio decoders	DTS-HD Master Audio
Apple docking compatibility	iPhone, iPod
AC input voltage	230 V
AC input frequency	50 Hz
Power consumption (standby)	0.5 W
Power consumption (typical)	430 W
Connectivity technology	Wired
Optical drive included	No
Audio formats supported	AIFF, ALAC, FLAC

Weight and Dimensions

Depth	339 mm
Width	434 mm
Height	151 mm
Weight	8500 g