Advertisement
3-18. GUI and PLD failure detection procedure
Check item(3-18.1.).
Does a video signal come from HDMI OUT to TV correctly? :
Turn Video Conversion "ON" on the setup menu.
(SETUP MENU-> Video-> Output Settings-> Video Conversion = On)
When the "SETUP" button on a remote control is pressed, is "MENU" displayed on TV which is connect-
ed to the HDMI output terminal on the AVR?
NO
YES
When the results of check item (3-18.1.) are "NO"
(When the menu display is not OK)
Check the Video signal line. (GUI -> HDMI Tx)
Check item(3-18.2.).
Check the format of the resistor video signal :
Send the following command from Termite.exe.
Send the command
"i 0020 0070
0001".
Is the return value "22/21/20/1F/15/14/13/11/10/06/05/04/02" ?
NO
Check the Video signal line. (GUI -> PLD)
HDMI OUT
Go to
check item (3-18.2.)
Go to
check item (3-18.5.)
Example
i 0020 0070 0001
22
YES
HDMI Tx [U3401] is faulty.
Replace with a new device.
Recheck from
check item (3.5.)
If it does not work, replace the PCB.
Check item(3-18.3.).
Check the PLD video signal line from the GUI :
Check the video signal waveform at the following test point.
Is the waveform like the sample?
TP
U2800
Check the peripheral pattern between the GUI [U2800] and PLD [U3200].
If there is no problem, the GUI [U2800] is faulty.
Replace with a new device.
Recheck from
check item (3.5.)
If it does not work, replace the PCB.
Check the Video signal line. (PLD -> HDMI Tx)
Check item(3-18.4.).
Check the HDMI Tx video signal line from the
PLD :
Check the video signal waveform at the following test point.
Is the waveform like the sample?
61 pin
U3401
YES
HDMI Tx [U3401] is faulty.
Replace with a new device.
Recheck from
check item (3.5.)
If it does not work, replace the PCB.
139
3.3V
Example of waveform in check ①
Voltage scale : 1.0V/div
Time scale : 1ms/div
3.3V
Example of waveform in check ②
Voltage scale : 1.0V/div
Time scale : 50ns/div
NO
3.3V
Example of waveform in check ①
Voltage scale : 1.0V/div
Time scale : 1ms/div
3.3V
Example of waveform in check ②
Voltage scale : 1.0V/div
Time scale : 1us/div
NO
Check the peripheral pattern between the PLD
[U3200] and HDMI Tx [U3401].
If there is no problem, the PLD [U3200] is faulty.
Replace with a new device.
Advertisement
