HDMI Switcher1 [U1003] is faulty.
Replace with a new device.
Recheck from check item (3.2.)
If it does not work, replace the PCB.
HDMI Switcher1 [U1003] is faulty.
Replace with a new device.
Check for a short circuit in the TMDS line.
If there is no problem, the HDMI Switch-
er1 [U1003] is faulty.
Replace with a new device.
Check for a short circuit in the DDC line.
If there is no problem, the HDMI Switch-
er1 [U1003] is faulty.
Replace with a new device.
When the results of check item (3-11.7.) are "33 or 23 or 13 or 03"
(Detection of HPD is OK / Detection of RXSENSE is OK )
Check item(3-11.8.). Check the Monitor EDID :
① Unplug the AC cord. Plug the AC cord into a power outlet.
② Send the transmission command "m_3" from Termite.exe.
Are the rst eight bytes of the returned value "00FFFFFFFFFFFF00"?
Check item(3-11.9.). Checking the TMDS :
Check the TMDS waveform at the following test
point.
N1030
HDMI OUT
[ZONE2]
D2+
D2-
D1+
D1-
D0+
D0-
CK+
CK-
Check item(3-11.10.). Check the communication :
Do "CK" and "DA" indicate (5V) at the test point
near HDMI output connector [N1030]?
N1030
HDMI OUT
[ZONE2]
DDCSCK
DDCSDA
Checking the EDID register. (HDMI ZONE2 OUT)
YES
NOYES
NO
NOYES
Example
The rst eight bytes are nor-
mally "00FFFFFFFFFFFF00".
The correct resistor value can-
not be checked if the AVR and
TV are not connected by HDMI.
m_3
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
TMDS Signal
3.3V
TMDS
Example of waveform in check ① Example of waveform in check ②
Voltage scale : 1.0V/div Voltage scale : 1.0V/div
Time scale : 20ms/div Time scale : 1s/div
Before Servicing
This Unit
Electrical Mechanical Repair Information Updating
116
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General
Weight and Dimensions
