Checking operation between the HDMI (SW) device and the HDMI device (Tx).
Checking operation between the HDMI (Tx) device and TV.
HDMI OUT1
HDMI1 in
HDMI5 in
Video Conversion OFF
NO
NO
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.
Checking the TMDS status register (Switcher1/2 -> HDMI Tx)
Example
The first operation : Checking
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.)
Check item(3-16.3.).
Checking the TMDS input. :
TMDS waveform at the following points.
HDMI IN1
124/125/127/128/130/131/133/134 pin
HDMI IN5
137/138/140/141/143/144/146/147 pin
U3401
HDMI Tx [
U3401
] is faulty.
Replace with a new device.
YES
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.
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)
Example
"
10
"
(Detection of HPD is OK / Detection of RXSENSE is not OK )
"
30
"
(Detection of HPD is OK / Detection of RXSENSE is 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 )
Go to
check item (3-16.8.)
Go to
check item (3-16.5.)
Go to
check item (3-16.9.)
Go to
check item (3-16.10.)
Recheck from
check item (3.4.)
If it does not work, replace the PCB.
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.
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
Before Servicing
This Unit
Electrical
Mechanical
Repair Information
Updating
128
