Denon AVR-S730H Service Manual

Check item(15). Check the I2C communication line :
Check the CPU.
Is the "I2C" waveform of the HDMI OSD [IC731] correct (like the one
shown in the diagram) when the power is turned on?
IC731
A_DA
A_CK
Check item(16). Check the I2C communication line :
Check HDMI OSD [IC731], CPU[IC751] patterns as well as soldering.
If there is no problem, go to the next step.
Check the HDMI Rx.
Remove the damping resistor [R7323/R7324]
of [IC731].
Is the "I2C" waveform correct?
CPU [IC751] is faulty. Replace with a new
device.
Check the I2C communication line.
Recheck from check item (1).
If it does not work, replace the PCB.
OSD[IC731] is faulty.
Replace with a new device.
YES
*The diagram shows an example.
(Signal patterns vary depending on the
timing.)
Points for checking waveforms
- Crest value (3.3 V normally)
- Signal change
- SCL frequency (400 kHz normally )
Voltage scale：1.0V/div
Time scale：10us/div
NO
YES
YES
NO
84
Caution in
servicing
Electrical Mechanical Repair Information Updating

Denon AVR-S730H Specifications

General

Channels	7.2
Power Output (6 ohm, 1 kHz, 0.7% 2ch Drive)	110W
Power Output (6 ohm, 1 kHz, 10% 1ch Drive)	165W
HDMI Inputs	6
HDMI Outputs	1
Dolby Atmos	Yes
DTS:X	Yes
DTS Virtual:X	Yes
Wi-Fi	Yes
Bluetooth	Yes
HEOS Multi-room	Yes
4K Ultra HD Pass-through	Yes
HDR Support	Yes (HDR10, Dolby Vision, HLG)
Auto Speaker Calibration	Audyssey MultEQ
AirPlay	Yes (AirPlay 2)
Internet Radio	Yes
Phono Input	No
Ethernet Port	Yes
Power Output per Channel	75W (8 ohm, 20Hz-20kHz, 0.08% 2ch Drive)
USB Input	1 (Front)