Check item(50).
Check communication between CPU and the
HDMI Tx device.
Send the following command from Termite.exe.
Send the command "
i 001A 00D0 0002
".
Is the return value "
6082
" ?
GUI failure detection procedure 1
Check item(49).
Rewrite to the GUI ROM.
After writing, is the GUI version readable correctly?
Go to
check item (3)
Checking device. (GUI)
Check the I2C communication line.
Example
If normal, "
6082
" is returned.
When the results of check item (50) are "the communication results are not OK"
Check item(53).
Check the power supply voltage
:
Does the power supply voltage of the GUI(
U1026
)
indicate the appropriate voltage (1.1 V, 3.3 V)?
The test points are as follows.
Check item(54).
Check the power supply voltage
:
Check the power supply components (
U1069
,
Q1063
) on the substrate and peripheral pattern.
If there is no problem, remove the GUI (
U1026
)
from the substrate and measure the voltage at
the test point of
check item (53)
.
Is the voltage correct (1.8 V or 3.3 V)?
Check the power supply voltage.
Checking device. (GUI)
Go to next page.
3-5 GUI IC (ADV8003) failure detection procedure
NO
NO
NO
If the communication results are OK
If the communication results are not OK
Go to
check item (3)
Check item(51).
Replace the GUI Rom(
U1027
).
Is the GUI version readable correctly?
Go to
check item (3)
Check item(52).
Replace the GUI(
U1026
).
Is the GUI version readable correctly?
Replace the PCB.
Go to
check item (53)
YES
YES
NO
The GUI (
U1026
) is faulty.
Replace with a new device.
Recheck from
check item (1).
If it does not work, replace the PCB.
The power supply circuit is faulty.
Replace the PCB.
NO
YES
YES
YES
102
Caution in
servicing
Electrical
Mechanical
Repair Information
Updating
