Denon AVR-X250BT Service Manual

TROUBLE SHOOTING
1. POWER
0.6V
1.1. The unit does not power on
YES YES
NO
YES
NO
YES
NO
NO
Does the power indicator on the front panel ash
in green when the power is turned on?
Is a fuse blown?
Does the power display on the front panel lights
green after approximately 10 seconds?
Check the voltage of [CN712 : 6, 8, 9pin] on the
DIGITAL PCB while the power display is ashing in
green.
Remove the connector [BN502] of the MAIN PCB.
Check the "3-4. Protection History Display Mode"
The unit does not power on
Is a fuse blown?
Does the power shut down after several
seconds?
Is DC 5 V being supplied from the SMPS PCB
[BN601] to the DIGITAL PCB?
See "1.2. Fuse is blown"
See "1.2. Fuse is blown"
Check the circuits around the Microprocessor on
the DIGITAL PCB and replace any faulty parts.
TO "3-4. Protection History
Display Mode"
Are there any parts not fully connected into the
connectors that connect the PCBs?
Is DC5V output even when the connector
[CN751] supplying power from the SMPS PCB to
the DIGITAL PCB is removed?
Check the circuits around the Microproces-
sor on the DIGITAL PCB and replace any faulty
parts.
Check for breakages and short circuits in the
circuits and parts between [CN751] on the
DIGITAL PCB and the microprocessor power
supply and replace any faulty parts.
Connect the connectors correctly.
TO "6. SMPS"
YES
Check for leaks and short circuits
in the parts on the primary side.
Replace any faulty parts.
Blown fuse
Check the rectier diode in the
rectier circuit on the secondary
side, and check for short circuits.
Replace any faulty parts.
Replace the fuse after repair.
Check for short circuits between the
regulator output terminal and GND
in the power supply stabilization
circuit. Replace faulty parts if there
is a short circuit.
1.2. Fuse is blown
NO
NO
NO
YES
YES
0V 3.3V
NO
YES
Check the voltage of [CN712 : 7pin] on the
DIGITAL PCB while the power display is ashing
in green.
Before Servicing
This Unit
Electrical Mechanical Repair Information Updating
58

Denon AVR-X250BT Specifications

General

Impedance	16 Ω
Receiver type	Surround
Frequency range	10 - 100000 Hz
Pre-out connectivity	Yes
Audio output channels	5.1 channels
Signal-to-Noise Ratio (SNR)	98 dB
Total Harmonic Distortion (THD)	1 %
Power output per channel (1KHz@6 Ohm)	90 W
Power output per channel (1KHz@8 Ohm)	70 W
Power output per channel (20-20KHz@8 Ohm)	130 W
AirPlay	No
Display	VFD
HDCP version	2.2
Product color	Black
Audio decoders	DTS-HD, DTS-HD Master Audio, Dolby Pro Logic II, Dolby TrueHD
HDMI in	5
Composite video in	2
Digital audio coaxial in	-
Supported graphics resolutions	3840 x 2160
AM band range	522 - 1611 kHz
FM band range	87.5 - 108 MHz
Supported radio bands	AM, FM
AC input voltage	230 V
AC input frequency	50 Hz
Power consumption (standby)	0.5 W
Power consumption (typical)	330 W
Number of HDMI outputs	1
Connectivity technology	Wired & Wireless
Speakers connectivity type	Clamp terminals

Weight and Dimensions

Depth	319 mm
Width	434 mm
Height	151 mm
Weight	7500 g