Check item(3-9.1.).
Check the TMDS CLK detection status of the
register.
Send the following command from Termite.exe.
Send the command "
i 0006 00FF 0001
".
When the following value is returned, go to Yes.
"
C8
"
When the following value is returned, go to No.
"
other
"
Checking the TMDS status register (OSD -> HDMI Rx/Tx)
Example
i 0006 00FF 0001
Check item(3-9.2.).
Checking the TMDS input waveform. :
Check the TMDS waveform at the following test point.
Is the waveform like the sample?
HDMI SW [
U1024
]
42/43/45/46/48/49/51/52pin
U1027
HDMI Rx/Tx [
U1027
] is faulty.
Replace with a new device.
Recheck from
check item (3.3.).
If it does not work, replace the PCB.
OSD [
U1030
] is faulty.
Replace with a new device.
Check the connection between the HDMI OUT terminal and the TV.
Go to
check item (3-9.3.)
.
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
3-9. OSD [
ADV7623
] failure detection procedure
Before Servicing
This Unit
Electrical
Mechanical
Repair Information
Updating
95
