Denon avr-s720w Service Manual

TMDS Signal
3.3V
TMDS
Example of waveform in check ① Example of waveform in check ②
When the results of check item (22) are "22"
(Detection of DDC is OK.)
Check item(25). Checking register of the TMDS CLK detection status
register :
Send the following command from Termite.exe.
HDMI Rx/Tx
Send the transmission command "i 002E 00FF 0001" from Termite.exe.
When the following value is returned, go to Yes.
HDMI In1 "44" HDMI In2 "22" HDMI In3 "11"
When the following value is returned, go to No.
HDMI In1 "00" HDMI In2 "00" HDMI In3 "00"
Check item(27). Checking register of the TMDS CLK detection status
register :
Send the following command from Termite.exe.
Send the transmission command "i 0006 00FF 0001" from Termite.exe.
When the following value is returned, go to Yes.
"CC or 44"
When the following value is returned, go to No.
"other"
Check item (26). Checking the TMDS input waveform. :
Check the TMDS waveform at the following test point.
Is the waveform like the sample?
HDMI In3
93/94/96/97/99/100/102/103pin
HDMI In2
80/81/83/84/86/87/89/90pin
HDMI In1
55/56/58/59/61/62/64/65pin
Checking the TMDS status register (HDMI SW)
Check the TMDS status of the register. (HHDMI SW -> HDMI Rx/Tx)
Example
i 002E 00FF 0001
Example
i 0006 00FF 0001
Check for a short circuit in the pattern of the
TMDS line of the HDMI SW(IC701) from the HDMI
input terminal.
If there is no problem, the HDMI SW(IC701) is
faulty. Replace with a new device.
HDMI SW(IC701) is faulty.
Replace with a new device.
Recheck from check item (2).
If it does not work, replace the PCB.
YES
YES
YES NO
NO
NOYES
Check item (28). Checking the TMDS input waveform. :
Check the TMDS waveform at the following test point.
Is the waveform like the sample?
55/56/58/59/61/62/64/65pin
TMDS Signal
3.3V
Example of waveform in check ①
TMDS
Example of waveform in check ②
The HDMI Rx/Tx (IC721) is faulty.
Replace with a new device.
HDMI SW(IC701) is faulty.
Replace with a new device.
84
Caution in
servicing
Electrical Mechanical Repair Information Updating

Denon avr-s720w Specifications

General

Channels	7.2
HDMI Inputs	6
HDMI Outputs	1
Dolby Atmos	Yes
DTS:X	Yes
Wi-Fi	Yes
Bluetooth	Yes
4K Ultra HD Pass-Through	Yes
HDR Support	Yes
3D Pass-Through	Yes
HDMI Version	2.0a
HDCP Version	2.2
AirPlay	Yes
Built-in HEOS	No
Phono Input	No
Ethernet Port	Yes
Dimensions (W x H x D)	17.1 x 6.6 x 13.3 inches
Power Output per Channel	75W (8 ohms, 20 Hz - 20 kHz, 0.08% THD)
USB Port	Yes