Denon AVR-S730H, Руководство по обслуживанию

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Example
The first eight bytes are normally
"00FFFFFFFFFFFF00".
*If the AVR and the TV are not con-
nected via HDMI, the correct register
value cannot be verified.
m_1
When the results of check item (54) are " 30 "
Detection of HPD is OK / Detection of RXSENSE is OK )
Check item(55). Check the Monitor EDID :
① Unplug the AC cord. Plug the AC cord into a power outlet.
② Send the transmission command " m_1 " from Termite.exe.
Are the first eight bytes of the returned value " 00FFFFFFFFFFFF00 "?
Check item(56). Checking the TMDS :
Check the TMDS waveform at the following test
point.
JK751
HDMI OUT
[MONITOR]
D2+ D2- D1+ D1- D0+ D0- CK+ CK-
Check item(57). Check communication with the
monitor :
Are waveforms of " DDCSCK " and " DDCSDA "
observed at the test point near the HDMI output
terminal [ JK751 ]?
JK751
HDMI OUT
[MONITOR]
DDCSCK
DDCSDA
Checking the EDID register. (Monitor)
HDMI Rx/Tx [ IC721 ] is faulty.
Replace with a new device.
Recheck from check item (3).
If it does not work, replace the PCB.
HDMI Rx/Tx [ IC721 ] is faulty.
Replace with a new device.
Check for a short circuit in the TMDS line.
If there is no problem, the HDMI Rx/Tx
( IC721 ) is faulty.
Replace with a new device.
HDMI Rx/Tx [ IC721 ] is faulty.
Replace with a new device.
NO YES NO YES
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
YES NO
101
Caution in
servicing
Electrical
Mechanical
Repair Information
Updating