Check communication between CPU and HDMI Rx device.
When the results of check item (7) are "the communication results are not OK"
Checking device. (HDMI Rx)
Check the power supply voltage. (HDMI Rx)
Check item(8).
Check the power supply voltage. :
Does the power supply voltage of the HDMI Rx1 (
U1000
) or HDMI Rx2 (
U1003
) indicate the appropriate
voltage (1.1 V, 3.3 V)?
The test points are as follows.
HDMI Rx1
(When checking HDMI inputs 1, 2, and 3)
HDMI Rx2
(When checking HDMI inputs 4, 5, 6, and 7)
112pin
38pin
3.3V
1.1V
112pin
38pin
3.3V
1.1V
Check item(9).
Check the power supply voltage :
Check the power components (
U1063/U1065/U1066
) and the pat-
tern on the substrate.
If there is no problem, remove the HDMI Rx (
U1000
or
U1003
) from
the substrate and measure the voltage at the test point of
check
item (8)
.
Is the voltage correct (1.1 V or 3.3 V)?
Check item(7).
: Check communication between CPU and the HDMI Rx
device.
Check by reading device ID and revision of each device.
Send the following command from Termite.exe.
HDMI Rx1 (When checking HDMI inputs 1, 2, and 3)
Check communication between RX1 (
U1000
) and CPU (
U1018
) .
Send the command "
i 0028 0000 0001
".
Is the return value "
01
" ?
HDMI Rx2 (When checking HDMI inputs 4, 5, 6, and 7)
Check communication between RX2 (
U1003
) and CPU (
U1018
) .
Send the command "
i 0050 0000 00001
".
Is the return value "
01
" ?
If the communication results are not OK
If the communication results are OK
Example :
If it is normal, "
01
" is returned.
i 0028 0000 0001
Go to
check item (13)
Recheck from
check item (3).
If it does not work, replace the PCB.
Go to
check item (8)
Checking device. (HDMI Rx)
3-2 HDMI Rx (MN864788) failure detection procedure
NO
YES
NO
YES
Go to next page.
Replace with a new device.
The power supply circuit is
faulty.
Replace the PCB.
85
Caution in
servicing
Electrical
Mechanical
Repair Information
Updating
