HDMI Tx [
U1039
] is faulty.
Replace with a new device.
Recheck from
check item (3).
If it does not work, replace the PCB.
HDMI Tx [
U1039
] is faulty.
Replace with a new device.
Check for a short circuit in the TMDS line.
If there is no problem, the HDMI Tx
[
U1039
] is faulty.
Replace with a new device.
Check for a short circuit in the DDC line.
If there is no problem, the HDMI Tx
[
U1039
] is faulty.
Replace with a new device.
When the results of check item (58) are "
30
"
(Detection of HPD is OK / Detection of RXSENSE is OK )
Check item(59).
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(60).
Checking the TMDS :
Check the TMDS waveform at the following test
point.
N1031
D2+ D2- D1+ D1- D0+ D0- CK+ CK-
HDMI
OUT 1
HDMI
OUT 1
Check item(61).
Check the communication :
Are waveforms of "
DDCCLK and DDCSDA
" ob-
served at the test point near the HDMI output
terminal [
N1031
]?
N1031
DDCSCK
DDCSDA
HDMI
OUT 1
HDMI
OUT 1
Checking the EDID register. (Monitor)
YES
NO
YES
NO
NO
YES
Example
The first eight bytes are nor-
mally "00FFFFFFFFFFFF00".
*If the AVR and the TV are not
connected via HDMI, the cor-
rect register value cannot be
verified.
m_1
less than 100KHz
5V
5V
This diagram shows an example of the DDC communica-
tion waveform.
-The high level voltage is 5V.
-The frequency of the DDC CLK is 100KHz or less.
Check at each test point.
Voltage scale：2.0V/div
Time scale：40us/div
Before Servicing
This Unit
Electrical
Mechanical
Repair Information
Updating
113
