Denon AVR-X6400H Service Manual page 129

When the results of check item (72) are "10"
(Detection of HPD is OK / Detection of RXSENSE is not OK )
Check the TMDS. (HDMI OUT1)
Check item(76). Checking the RXSENSE. :
Does the test point near HDMI output terminal [N3401] indicate
(3.3V)?
N3401
HDMI OUT
[MONITOR2]
YES NO
Check for a short circuit in the TMDS line.
If there is no problem, the HDMI Tx [U3401] is faulty.
Replace with a new device.
HDMI Tx [U3401] is faulty.
Replace with a new device.
Recheck from check item (4).
If it does not work, replace the PCB.
When the results of check item (72) are "20"
(Detection of HPD is not OK / Detection of RXSENSE is OK )
Check the HPD. (HDMI OUT1)
Check item(77). Checking the HPD :
Does the test point (HPD) near HDMI output terminal [N3401] indi-
cate "Hi(3-5V)"?
N3401
HDMI OUT
[MONITOR2]
HPD
YES NO
Check for a short circuit in the HPD line.
If there is no problem, the HDMI Tx [U3401] is faulty.
Replace with a new device.
HDMI Tx [U3401] is faulty.
Replace with a new device.
Recheck from check item (4).
If it does not work, replace the PCB.
129