Denon AVR-X8500H Service Manual

When the results of check item (80) are "78 or 70"
(Detection of 5V is not OK.)
When the results of check item (81) are "00 or 04"
(Detection of DDC is not OK.)
Check item(82). Check the +5V voltage.
Does the HDMI Tx [U3401] test point indicate (5V)?
The test points are as follows.
U3401
106pin
Check item(83). Check the DDC line :
Are the "DDCSCK" and "DDCSDA" waveforms for
the HDMI Tx [U3401] signal correct (as shown in the
gure)?
The test points are as follows.
N3403
HDMI OUT
[F-HDMI]
DDCSCK
DDCSDA
Check the +5V voltage. (HDMI DDC Buffer) Check the DDC Line. (HDMI DDC Buffer)
HDMI Tx [U3401] is faulty.
Replace with a new device.
Recheck from check item (4).
If it does not work, replace the PCB.
Recheck from check item (4).
If it does not work, replace the PCB.
HDMI Tx [U3401] is faulty.
Replace with a new device.
Check for a short circuit in the 5 V line, the
Front HDMI FFC, and the 5 V Switch [U2400].
If there is no problem, the HDMI Tx [U3401] or
the 5V Switch [U2400] is faulty.
Replace with a new device.
Check for a short circuit in the DDC line and
check the Front HDMI FFC.
If there is no problem, the HDMI DDC Buffer
[U5501] is faulty.
Replace with a new device.
YESYES
NO NO
less than 100KHz
5V
5V
This diagram shows an example of the DDC commu-
nication waveform.
-The high level voltage is 5V.
-The frequency of the DDC CLK is 100kHz or less.
Check at each test point.
Voltage scale : 2.0V/div
Time scale : 40us/div
Before Servicing
This Unit
Electrical Mechanical Repair Information Updating
132

Denon AVR-X8500H Specifications

General

Channels	13.2
Power Output	150W per channel (8 ohms, 20Hz-20kHz, 0.05% THD)
Frequency Response	10Hz-100kHz (+1, -3dB)
HDMI Inputs	8 (1 front)
HDMI Outputs	3
Dolby Atmos	Yes
DTS:X	Yes
IMAX Enhanced	Yes
HEOS Multi-room	Yes
Wi-Fi	Yes
Bluetooth	Yes
Voice Control	Amazon Alexa, Google Assistant, Apple Siri
Impedance	4-16 ohms
HDR Compatibility	HDR10, Dolby Vision, HLG
Audio Return Channel (ARC)	Yes
Digital Audio Inputs	2 Optical, 2 Coaxial
Analog Audio Inputs	6
Phono Input	Yes
Speaker Connectors	Binding Posts
Supported Audio Formats	MP3, WMA, AAC, FLAC, ALAC, WAV, DSD
Surround Sound Support	Dolby Atmos, DTS:X, Auro-3D
Tuner	AM/FM
Input Sensitivity/Impedance	200 mV / 47 kohms
HDCP Support	2.2
Other Connections	USB, Ethernet, RS-232C
Wireless Connectivity	Wi-Fi, Bluetooth
Signal-to-Noise Ratio	102 dB
DAC	AKM AK4490EQ (32-bit/192kHz)
Total Harmonic Distortion	0.05% (20Hz - 20kHz, 150W)