Check item (60).
Check communication between CPU and the HDMI
SW device.
Send the following command from Termite.exe.
Send the command "
i 0040 00E1 0002
".
Is the return value "
2104
""
01
" ?
Checking device. (HDMI SW)
Checking device. (HDMI SW)
Checking the reset waveform.
Check the I2C communication line.
3-6 HDMI SW IC (ADV7850) failure detection procedure
Example
If it is normal, "
2104
" is returned.
i 0040 00E1 0002
2104
If the communication results are OK
If the communication results are not OK
Go to
check item (63)
Go to
check item (61)
When the results of check item (60) are "the communication results are not OK"
Check item(61).
Checking the reset :
Check the CPU.
Is the "
RESET
" waveform of the TP near the HDMI SW (
U1055
) cor-
rect (like the one shown in the diagram) when the power is turned
on?
RESET
Example of the waveform to be checked
Recheck from
check item (6).
If it does not work, replace the PCB.
Check item(62).
Checking the HDMI SW :
Replace the (
R2148, R2149
) and recheck from
check item (53)
.
Is the returned value "
2104
"?
Check the reset circuit between CPU (
U1018
) and
HDMI SW (
U1055
).
If there is no problem, the HDMI SW (
U1055
) is
faulty.
Replace with a new device.
HDMI SW (
U1055
) is faulty.
Replace with a new device.
YES
NO
YES
NO
108
Caution in
servicing
Electrical
Mechanical
Repair Information
Updating