When the results of check item (3-13.4.) are "
22
"
(Detection of DDC is OK)
Check item(3-13.7.).
Check the TMDS CLK detection status of the
register : :
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(3-13.8.).
Checking the TMDS input waveform. :
Check the TMDS waveform at the following test point.
Is the waveform like the sample?
HDMI Rx1 [
U1000
]
42/43/45/46/48/49/51/52 pin
U1000
Checking the TMDS status register
HDMI Rx1 [
U1000
] is faulty.
Replace with a new device.
Recheck from
check item (3.2.).
If it does not work, replace the PCB.
Check for a short circuit in the TMDS line and the FRONT HDMI
Cable.
If there is no problem, the HDMI DDC Buffer [
IC201
] is faulty.
Replace with a new device.
HDMI Rx1 [
U1000
] 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
Before Servicing
This Unit
Electrical
Mechanical
Repair Information
Updating
117
