Check communication between CPU and the HDMI Rx/Tx device.
When the results of check item (5) are "the communication results are not OK"
Checking (HDMI Rx/Tx) device.
Check the power supply voltage. (HDMI Rx/Tx)
Check item(6).
Check the power supply voltage. :
Does the power supply voltage of the HDMI Rx/Tx (
IC721
) indicate the appropriate voltage (1.1 V, 3.3 V)?
The test points are as follows.
112pin
38pin
3.3V
1.1V
Check item(7).
Check the power supply voltage :
Check the power components (
IC741, IC747, Q7416
) and the pat-
tern on the substrate.
If there is no problem, remove the HDMI Rx/Tx (
IC721
) from the
substrate and measure the voltage at the test point of
check item (6)
.
Is the voltage correct (1.1 V or 3.3 V)?
Check item (5).
: Check communication between CPU and the HDMI
Rx device.
Check by reading device ID and revision of each device.
Check communication between Rx/Tx(
IC721
) and CPU(
IC751
) .
Send the transmission command "
i 0000 0000 0001
" from Termite.
exe.
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 0000 0000 0001
Go to
check item (11)
Replace with a new device.
The power supply circuit is
faulty.
Replace the PCB.
Recheck from
check item (2).
If it does not work, replace the PCB.
Go to
check item (6)
Checking HDMI (HDMI Rx/Tx) device
3-2 HDMI Rx/Tx MN864788)failure detection procedure
NO
YES
NO
YES
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servicing
Electrical
Mechanical
Repair Information
Updating
