Denon AVR-S750H Service Manual

When the results of check item (3-9.2.) are "00 or 04"
(Detection of DDC is not OK.)
Check item(3-9.4.). Check the DDC Line HPD line :
Are waveforms of "DDCSCK" and "DDCSDA" observed at the test point near the HDMI input terminal
[JK701/JK711/JK721]?
JK721
HDMI 3
[Blu-ray]
JK711
HDMI 2
[DVD]
JK701
HDMI 1
[CBL/SAT]
DDCSCK
DDCSDA
Check the DDC line. (HDMI SW)
HDMI SW [IC701] is faulty.
Replace with a new device.
Check for a short circuit in the DDC line.
If there is no problem, the HDMI SW [IC701] is
faulty.
Replace with a new device.
Recheck from check item (3.2.).
If it does not work, replace the PCB.
YES 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 100 KHz or less.
Check at each test point.
Voltage scale：2.0V/div
Time scale：40us/div
When the results of check item (3-9.1.) are "00"
(Detection of 5V is not OK)
Check item(3). Check the +5V voltage :
Does "+5V" at the following test point indicate 5 V? [JK701/JK711/JK721]
JK721
HDMI 3
[Blu-ray]
JK711
HDMI 2
[DVD]
JK701
HDMI 1
[CBL/SAT]
+5V +5V +5V
Check the +5V voltage. (HDMI SW)
HDMI SW [IC701] is faulty.
Replace with a new device.
Check for a short circuit in the 5 V line and the 5
V Switch IC [IC733].
If there is no problem, the HDMI SW [IC701] is
faulty.
Replace with a new device.
YES NO
Recheck from check item (3.2.).
If it does not work, replace the PCB.
Before Servicing
This Unit
Electrical Mechanical Repair Information Updating
103

Denon AVR-S750H Specifications

General

Receiver type	stereo
Frequency range	10 - 100000 Hz
Input sensitivity	200 mV
Audio output channels	7.2 channels
Signal-to-Noise Ratio (SNR)	98 dB
Total Harmonic Distortion (THD)	10 %
Power output per channel (1KHz@6 Ohm)	165 W
Power output per channel (20-20KHz@8 Ohm)	75 W
AirPlay	Yes
Display	VFL
HDCP version	2.3
Apple docking	No
Product color	Black
Audio decoders	DTS-HD Master Audio, Dolby TrueHD
Volume control	Rotary
HDMI in	6
Composite video in	2
Digital audio optical in	1
Package depth	432 mm
Package width	523 mm
Package height	229 mm
Package weight	10614 g
AC input voltage	120 V
AC input frequency	60 Hz
Power consumption (standby)	0.5 W
Power consumption (typical)	400 W
AM band range	520 - 1710 kHz
FM band range	87.5 - 107.9 MHz
Supported radio bands	AM, FM
Audio formats supported	AAC, ALAC, DSD, FLAC, MP3, WAV, WMA
Image formats supported	JPEG
Speakers connectivity type	RCA

Weight and Dimensions

Depth	330 mm
Height	152 mm
Weight	8618 g