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Denon AVR-S750H Service Manual

Denon AVR-S750H
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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

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Denon AVR-S750H Specifications

General IconGeneral
Receiver typestereo
Frequency range10 - 100000 Hz
Input sensitivity200 mV
Audio output channels7.2 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
AirPlayYes
DisplayVFL
HDCP version2.3
Apple dockingNo
Product colorBlack
Audio decodersDTS-HD Master Audio, Dolby TrueHD
Volume controlRotary
HDMI in6
Composite video in2
Digital audio optical in1
Package depth432 mm
Package width523 mm
Package height229 mm
Package weight10614 g
AC input voltage120 V
AC input frequency60 Hz
Power consumption (standby)0.5 W
Power consumption (typical)400 W
AM band range520 - 1710 kHz
FM band range87.5 - 107.9 MHz
Supported radio bandsAM, FM
Audio formats supportedAAC, ALAC, DSD, FLAC, MP3, WAV, WMA
Image formats supportedJPEG
Speakers connectivity typeRCA
Weight and Dimensions IconWeight and Dimensions
Depth330 mm
Height152 mm
Weight8618 g

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