Denon AVR-X250BT Service Manual

2. Analog video
MONITOR OUT (CVBS) output NG
Is a signal being output from the video amplier?
Output V : [IC781 : 1pin]
Check the cable between the unit and the
monitor or check the monitor.
The power supply circuit is faulty.
Does the signal input to the video amplier?
(for SAT/CBL function)
Vin3 : [IC781 : 7pin]
Check the settings of each IC. Are the following
voltages set?
SW2 : [IC781 : 10pin] : 3.3V : OK
SW5 : [IC781 : 2pin] : 3.3V : OK
The circuit around [IC781] is faulty.
The CPU [IC711] is faulty.
Check the pattern between [JK781] and [IC781],
and then check the Blu-ray/DVD player or the
cable between the unit and the Blu-ray/DVD
player.
Is the power voltage being output correctly?
+5V : [C7810 : + side]
-5V : [C7811 : - side]
YES YES
YES
YES
NO
NO NO
NO
1.+12V
2.VGND
3.-12V
4.CVBS_SW2
5.CVBS_SW5
6.+5VD
7.OPT1_IN
8.DGND
9.OPT2_IN
CN781_1 PIN
(+12V TP)
(+12V TP)
CN781_3 PIN
Pb
C7814
C7815
R7811
R7810
R7812
R7809
C7808
C7809
C7803
C7802
C7806
C7807
C7801
C7714
C7715
C7812
R7806
R7804
R7803
R7802
R7801
IC781
SW2
+5V
Output V
SW5
Input V
-5V
VIDEO test point
VIDEO PCB (B SIDE)
Before Servicing
This Unit
Electrical Mechanical Repair Information Updating
59

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