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GUI IC (ADV8003) failure detection procedure 2
Checking the TMDS status register (GUI -> HDMI Tx)
Check item(51).
Check the TMDS CLK detection status of the regis-
ter.
Send the following command from Termite.exe.
Send the command
"i 0006 00FF
0001".
When the following value is returned, go to Yes.
"74"
When the following value is returned, go to No.
"70"
NO
Check item (52).
Checking the TMDS input. :
TMDS waveform at the following points.
55/56/58/59/61/62/64/65 pin
YES
HDMI Tx (U1039) is faulty.
Replace with a new device.
Recheck from
check item (5).
If it does not work, replace the PCB.
Example
YES
HDMI Tx (U1039) is faulty.
Replace with a new device.
Recheck from
check item (5).
If it does not work, replace the PCB.
3.3V
TMDS Signal
Example of waveform in check ①
TMDS
Example of waveform in check ②
NO
The GUI (U1026) is faulty.
Replace with a new device.
102
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