Marantz AV7703 Service Manual page 115

When the results of check item (45) are "00"
(Detection of HPD is not OK / Detection of RXSENSE is not OK )
Check the RXSENSE/HPD. (Monitor1)
Check item(51). Checking the HPD and RXSENSE. :
Does the test point of RXSENSE close to the HDMI output terminal
(JK431) indicate the 3.3 V?
Does the test point of HPD close to the HDMI output terminal (JK431)
indicate the Hi(3-5V)?
JK431
HPD
YES NO
Check for a short circuit in the TMDS/ HPD line.
If there is no problem, the HDMI Tx (IC431) is faulty.
Replace with a new device.
HDMI Tx (IC431) is faulty.
Replace with a new device.
Recheck from check item (5).
If it does not work, replace the PCB.
Checking between Monitor 2 and the TV.
Connect Monitor 2 to the TV and check the following items with the TV turned on.
Checking the HPD/RXSENSE status register. (Monitor2)
Check item(52). Check the HPD and RXSENSE register value of the
HDMI TX device. :
Send the following command from Termite.exe.
Send the command "i 0000 0040 0001".
Move to the branch destination according to the value returned.
"03"
(Detection of HPD is OK / Detection of RXSENSE is OK )
"01"
(Detection of HPD is OK / Detection of RXSENSE is not OK )
"02"
(Detection of HPD is not OK / Detection of RXSENSE is OK )
"00"
(Detection of HPD is not OK / Detection of RXSENSE is not OK )
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Example
Go to check item (53)
Go to check item (55)
Go to check item (57)
Go to check item (58)