Example
The rst eight bytes are normally
"00FFFFFFFFFFFF00".
*If the AVR and the TV are not con-
nected via HDMI, the correct register
value cannot be veried.
When the results of check item (52) are "03"
(Detection of HPD is OK / Detection of RXSENSE is OK )
Check item(53). Check the Monitor EDID :
① Unplug the AC cord. Plug the AC cord into a power outlet.
② Send the transmission command "m_2" from Termite.exe.
Are the rst eight bytes of the returned value "00FFFFFFFFFFFF00"?
Check item(54). Checking the TMDS :
Check the TMDS waveform at the following test
point.
JK432
D2+
D2-
D1+
D1-
D0+
D0-
CK+
CK-
Check item(55). Check communication with the
monitor :
Are waveforms of "DDCSCK" and "DDCSDA"
observed at the test point near the HDMI output
terminal (JK432)?
JK432
DDCSCK
DDCSDA
Checking the EDID register. (Monitor2)
HDMI Tx (IC431) is faulty.
Replace with a new device.
Recheck from check item (5).
If it does not work, replace the PCB.
HDMI Tx (IC431) is faulty.
Replace with a new device.
Check for a short circuit in the TMDS line.
If there is no problem, the HDMI Tx
(IC431) is faulty.
Replace with a new device.
HDMI Tx (IC431) is faulty.
Replace with a new device.
NOYES NOYES
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.
YES NO
116
Caution in
servicing
Electrical Mechanical Repair Information Updating
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