Checking operation between the HDMI (Rx) device and the HDMI device (Tx).
Checking operation between the HDMI (Tx) device and TV.
HDMI OUT
HDMI1 in
HDMI4 in
Video Conversion OFF
NO
NO
Check item(56).
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 OUT
"
72
" : Go to Yes.
"
74
" : Go to No.
When checking the signal path from HDMI4 IN to HDMI OUT
"
71
" : Go to Yes.
"
74
" : Go to No.
Checking the TMDS status register (HDMI Rx -> HDMI Tx)
Example
The first operation : Checking
between Monitor and the TV.
Go to
check item (58)
Check item(57).
Checking the TMDS input. :
TMDS waveform at the following points.
Between HDMI Rx1 and HDMI Tx
80/81/83/84/86/87/89/90 pin
Between HDMI Rx2 and HDMI Tx
93/94/96/97/99/100/102/103 pin
U1039
HDMI Tx [
U1039
] is faulty.
Replace with a new device.
YES
Check item(58).
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 Monitor and the TV.
Connect Monitor 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 (62)
Go to
check item (59)
Go to
check item (63)
Go to
check item (64)
Recheck from
check item (3).
If it does not work, replace the PCB.
If it is No between HDMI Rx1 and HDMI Tx.
HDMI Rx1 [
U1000
] is faulty.
Replace with a new device.
If it is No between HDMI Rx2 and HDMI Tx.
HDMI Rx2 [
U1003
] is faulty.
Replace with a new device.
YES
NO
TMDS Signal
3.3V
TMDS
Example of waveform in check ① Example of waveform in check ②
Voltage scale：1.0V/div Voltage scale：1.0V/div
Time scale：20ms/div Time scale：1s/div
3-13. HDMI transmission IC [
MN864788
] failure detection procedure
Before Servicing
This Unit
Electrical
Mechanical
Repair Information
Updating
112
