TMDS Signal
3.3V
TMDS
Example of waveform in check ① Example of waveform in check ②
When the results of check item (14) are "
22 or 11
"
(Detection of DDC is OK.)
Check item(17).
Checking register of the TMDS CLK detection status
register :
Send the following command from Termite.exe.
Send the command "
i 002E 00FF 0001
".
When the following value is returned, go to Yes.
HDMI IN5 "
C4
", HDMI IN6 "
A2
", HDMI IN7 "
91
"
When the following value is returned, go to No.
HDMI IN5 "
C0
", HDMI IN6 "
A0
", HDMI IN7 "
90
"
Check item (18).
Checking the TMDS input waveform. :
Check the TMDS waveform at the following test point.
Is the waveform like the sample?
HDMI IN5
55/56/58/59/61/62/64/65 pin
HDMI IN6
80/81/83/84/86/87/89/90 pin
HDMI IN7
93/94/96/97/99/100/102/103 pin
IC391
Checking the TMDS status register (HDMI Switcher1)
Example
i 002E 00FF 0001
Check for a short circuit in the pattern of the
TMDS line of the HDMI Switcher1 (
IC391
) from
the HDMI input terminal.
If there is no problem, the HDMI Switcher1 (
IC391
)
is faulty.
Replace with a new device.
HDMI Switcher1 (
IC391
) is faulty.
Replace with a new device.
Recheck from
check item (3).
If it does not work, replace the PCB.
YES
NO
NO
YES
Check item(19).
Check the HPD and RXSENSE register value of
the device.
Send the following command from Termite.exe.
Send the command "
i 0028 0040 0001
".
Check the value.
Move to the branch destination according to the value returned.
Checking the HPD/RXSENSE status register. (HDMI ZONE2 OUT)
Example
If it is normal, "
33
" is returned.
The correct resistor value cannot be
checked if the AVR and TV are not
connected by HDMI.
i 0028 0040 0001
33
"
31 or 21 or 11 or 01
"
(Detection of HPD is OK / Detection of RXSENSE is not OK )
"
33 or 23 or 13 or 03
"
(Detection of HPD is OK / Detection of RXSENSE is OK )
"
32 or 22 or 12 or 02
"
(Detection of HPD is not OK / Detection of RXSENSE is OK )
"
30 or 20 or 10 or 00
"
(Detection of HPD is not OK / Detection of RXSENSE is not OK )
Go to
check item (23)
Go to
check item (20)
Go to
check item (24)
Go to
check item (25)
107
Caution in
servicing
Electrical
Mechanical
Repair Information
Updating
