Checking operation between the HDMI (Front HDMI Buffer) and the player
b
In order to check, connect the player to the HDMI terminal and configure the player as AVR source.
Check the sound output while turning on the player.
Check item(29).
Check the power supply voltage :
Does the power supply voltage of the Front HDMI FFC base (
CN701
) indicate the correct voltage (5V)?
The test points are as follows.
TP(5V)
Check item(31).
Checking the 5 V status of the register :
Send the following command from Termite.exe.
Send the transmission command "
i 002E 00FF 0001
".
Move to the branch destination according to the value returned.
Check the power supply voltage. (HDMI Buffer)
Checking the +5V/DDC status register (Front HDMI Buffer)
Check item(30).
Check the power supply voltage :
Check the FETSW and peripheral pattern. If there is no problem, remove the Front HDMI FFC
from the substrate and measure the voltage at the test point of
check item (36)
.
Is the power supply voltage correct (5 V)?
Front HDMI Buffer (
IC811
) is faulty.
Replace with a new device.
Example
i 002E 00FF 0001
"
00
"
(Detection of 5V is not OK.)
"
00 or 04
"
(Detection of DDC is not OK.)
"
88 or 80
"
(Detection of 5V is OK)
"
22
"
(Detection of DDC is OK)
Go to
check item (33)
Go to
check item (34)
Go to
check item (35)
Replace the FET SW(
Q7412
)/
Resistor(
R7461
/
7462
/
7463
) and recheck from
check item (30)
. If it does not work, replace the
PCB.
Recheck from
check item (2).
If it does not work, replace the PCB.
3-4 Front HDMI Buffer IC (AD8195) failure detection procedure
YES
YES
NO
NO
Check item(32).
Checking the status of the register :
Send the following command from Termite.exe.
Send the transmission command "
i 002B 00B4 0001
".
Move to the branch destination according to the value returned.
Example
i 002B 0084 0001
85
Caution in
servicing
Electrical
Mechanical
Repair Information
Updating
