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Checking operation between the HDMI (SW) device and the HDMI device (Tx).
Checking operation between the HDMI (Tx) device and TV.
HDMI1 in
HDMI5 in
Video Conversion OFF
Checking the TMDS status register (Switcher1/2 -> HDMI Tx)
Check item(3-16.2.).
Check the TMDS CLK detection status of the
register.
Send the following command from Termite.exe.
Send the command
"i 0006 00FF
0001".
When checking the signal path from HDMI1 to HDMI OUT1
"72" : Go to YES.
"74" : Go to No.
When checking the signal path from HDMI5 IN to HDMI OUT1
"71" : Go to YES.
"74" : Go to No.
NO
Check item(3-16.3.).
Checking the TMDS input. :
TMDS waveform at the following points.
U3401
HDMI IN1
124/125/127/128/130/131/133/134 pin
HDMI IN5
137/138/140/141/143/144/146/147 pin
NO
HDMI Tx [U3401] is faulty.
Replace with a new device.
YES
Recheck from
check item (3.4.)
If it does not work, replace the PCB.
HDMI OUT1
Example
The first operation : Checking
YES
between Monitor 1 and the TV.
Go to
check item (3-16.1.)
Next operation : Checking be-
tween Monitor 2 and the TV.
Go to
check item (3-16.8.)
3.3V
TMDS Signal
Example of waveform in check ①
Voltage scale : 1.0V/div
Time scale : 20ms/div
TMDS
NO
Example of waveform in check ②
Voltage scale : 1.0V/div
Time scale : 1s/div
Case of HDMI IN1
HDMI Switcher2 [U2601] is faulty.
Replace with a new device.
Case of HDMI IN5
HDMI Switcher1 [U2401] is faulty.
Replace with a new device.
Checking between Monitor1 and the TV.
Connect Monitor1 to the TV and check the following items with the TV turned on.
Checking the HPD/RXSENSE status register. (HDMI Tx -> Monitor)
Check item(3-16.4.).
Check the HPD and RXSENSE register value
of the HDMI TX device. :
Send the following command from Termite.exe.
Send the command
"i 0000 0040
0001".
Move to the branch destination according to the value returned.
"30"
(Detection of HPD is OK / Detection of RXSENSE is OK )
"10"
(Detection of HPD is OK / Detection of RXSENSE is not OK )
"20"
(Detection of HPD is not OK / Detection of RXSENSE is OK )
"00"
(Detection of HPD is not OK / Detection of RXSENSE is not OK )
128
Example
Go to
check item (3-16.5.)
Go to
check item (3-16.8.)
Go to
check item (3-16.9.)
Go to
check item (3-16.10.)
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