Denon AVR-X6400H Service Manual

Check item(20). Check the I2C communication line :
Check the CPU.
Is the "I2C" waveform of the TP near the [U2000] correct (like the
one shown in the diagram) when the power is turned on?
U2000
R2032 I2C(AVSCL)
R2033 I2C(AVSDA)
Check item(21). Check the I2C communication line :
Check GUI [U2800], VIDEO DECODER [U2000] and FET [Q2001] patterns as well as soldering.
If there is no problem, go to the next step.
Check the I2C communication line again after replacing the FET [Q2001].
If there is still a problem, the GUI [U2800] is faulty.
Replace with a new device.
Check the I2C communication line.
The GUI [U2800] is faulty.
Replace with a new device.
YES
*The diagram shows an example.
(Signal patterns vary depending on the tim-
ing.)
Points for checking waveforms
- Crest value (3.3V normally)
- Signal change
- SCL frequency (400kHz normally)
Voltage scale : 1.0V/div
Time scale : 10us/div
NOYES
Recheck from check item (1).
If it does not work, replace the PCB.
106
Caution in
servicing
Electrical Mechanical Repair Information Updating

Denon AVR-X6400H Specifications

General

Receiver type	Surround
Frequency range	10 - 100000 Hz
Pre-out channels	11.2
Input sensitivity	200 mV
Pre-out connectivity	Yes
Audio output channels	11.2 channels
Signal-to-Noise Ratio (SNR)	100 dB
Power output per channel (1KHz@6 Ohm)	205 W
Power output per channel (20-20KHz@8 Ohm)	140 W
Display	-
HDCP version	2.2
Apple docking	No
Product color	Silver
Audio decoders	DTS:X, Dolby Atmos
Audio formats supported	ALAC, DSD, FLAC, WAV
RS-232 ports	1
Connectivity technology	Wireless
AM band range	522 - 1611 kHz
FM band range	87.5 - 108 MHz
Supported radio bands	AM, FM
Internet radio services supported	Deezer, Napster, Spotify, Tidal, TuneIn
HDMI in	8
Composite video in	4
Component video (YPbPr/YCbCr) in	2
AC input voltage	230 V
AC input frequency	50 Hz
Power consumption (standby)	0.5 W
Power consumption (typical)	750 W
Number of HDMI outputs	3

Weight and Dimensions

Depth	393 mm
Width	434 mm
Height	167 mm
Weight	14500 g