When the results of check item (47) are "22"
(Detection of DDC is OK)
Check item(50). Check the TMDS CLK detection status of the regis-
ter.
Send the following command from Termite.exe.
Send the command "i 002E 00FF 0001".
When the following value is returned, go to Yes.
"88"
When the following value is returned, go to No.
"80"
Check item (51). Checking the TMDS input waveform. :
Check the TMDS waveform at the following test point.
Is the waveform like the sample?
HDMI SW[U1024]
70/71/73/74/76/77/79/80pin
U1024
Checking the TMDS status register
HDMI SW [U1024] is faulty.
Replace with a new device.
Recheck from check item (2).
If it does not work, replace the PCB.
Check for a short circuit in the TMDS line and the Front HDMI FFC.
If there is no problem, the Front HDMI Buffer [U3000] is faulty.
Replace with a new device.
HDMI SW [U1024] is faulty.
Replace with a new device.
Example
i 002E 00FF 0001
YES
YES NO
TMDS Signal
3.3V
Example of waveform in check ①
Voltage scale：1.0V/div
Time scale：20ms/div
TMDS
Example of waveform in check ②
Voltage scale：1.0V/div
Time scale：1s/div
NO
99
Caution in
servicing
Electrical Mechanical Repair Information Updating
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