Denon AVR-E400 Service Manual

4.2. Power AMP (AMP UNIT)
No sound is output.
The protector operates.
Is the power transistor open or short-
circuited?
2SB1560/2SD2390
Is the emitter resistance of the power
transistor open?
0.47Ω
Is the base resistance of the power
transistor open?
22Ω
Is the trimmer potentiometer between the
base of the power transistor open?
1kΩ
Are the zener diode and diode which
are connected with the base of a power
transistor short-circuited?
MTZJ3.3B
1SS133
Is other transistor trouble?
Is other resistance trouble?
Turn on the power, check that voltage of the section is normal and that idling electric current is
owing.
Replace the power transistor.
Replace the transistor.
Replace the resistance.
Replace the emitter resistance.
Replace the base resistance.
Replace the trimmer potentiometers.
Replace the zener diode and the diode.
YES
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO
NO
YES
90

Denon AVR-E400 Specifications

General

HDMI Inputs	6
HDMI Outputs	1
3D Pass-through	Yes
4K Pass-through	Yes
Dolby TrueHD	Yes
DTS-HD Master Audio	Yes
Audyssey MultEQ	Yes
Network Connectivity	Yes
AirPlay	Yes
DLNA	Yes
Input Impedance	47 kOhms
Input Sensitivity	200 mV
Signal-To-Noise Ratio	100 dB
Response Bandwidth	10 Hz - 100 kHz
THD	0.08%
Tuner Presets	56
Tuner Bands	AM/FM
Frequency Response	10 Hz - 100 kHz
Video Upscaling	Yes
Bluetooth	No
Wi-Fi	No
Surround Sound Effects	DTS Neo:6
Audio D/A Converter	192kHz/24-bit
Inputs	HDMI, Digital Optical, Digital Coaxial, Analog
Outputs	HDMI, Headphones