Check communication between CPU and the HDMI Switcher2 device.
When the results of check item (26) are "the communication results are not OK"
Checking device. (HDMI Switcher2)
Check the power supply voltage. (HDMI Switcher2)
Check item (26).
Check communication between CPU and the HDMI
Switcher2 device. :
Check by reading device ID and revision of each device.
Check communication between HDMI Switcher2 (
IC381
) and CPU
(
IC151
) .
Send the following command from Termite.exe.
Send the command "
i 0050 0000 0001
".
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 0050 0000 0001
01
Go to
check item (30)
HDMI Switcher2 (
IC381
) device is
failure.
Replace with a new device.
The power supply circuit is faulty.
Replace the PCB.
Recheck from
check item (4).
If it does not work, replace the PCB.
Go to
check item (27)
Checking device. (HDMI Switcher2)
3-3 Switcher2 failure detection procedure
YES
NO
YES
Go to next page.
Check item(27).
Check the power supply voltage.
:
Does the power supply voltage of the HDMI
Switcher2 (
IC381
) indicate the correct voltage
(1.1V, 3.3V)?
The test points are as follows.
IC381
112 pin
1.1V
Check item(28).
Check the power supply voltage.
:
Check the power components (
IC120
) and the
pattern on the substrate.
If there is no problem, remove the HDMI Switch-
er2 (
IC381
) from the substrate and measure the
voltage at the test point of
check item (27)
.
Is the power supply voltage correct (1.1V)?
NO
111
Caution in
servicing
Electrical
Mechanical
Repair Information
Updating
