Denon AVR-X4400H Service Manual

Also see for AVR-X4400H: Manual Owner's manual

HDMI Tx [IC431] is faulty.Replace with a new device.HDMI Tx [IC431] is faulty.Replace with a new device.Recheck from check item (4).If it does not work, replace the PCB.Recheck from check item (4).If it does not work, replace the PCB.Check for a short circuit in the TMDS line.If there is no problem, the HDMI Tx [IC431] is faulty.Replace with a new device.Check for a short circuit in the HPD line.If there is no problem, the HDMI Tx [IC431] is faulty.Replace with a new device.When the results of check item (72) are "10"(Detection of HPD is OK / Detection of RXSENSE is not OK )When the results of check item (72) are "20"(Detection of HPD is not OK / Detection of RXSENSE is OK )Check item(76). Checking the RXSENSE. :Does the test point near HDMI output terminal [JK431] indicate(3.3V)?JK431HDMI OUT[MONITOR1]D2+D2-D1+D1-D0+D0-CK+CK-Check item(77). Checking the HPD :Does the test point (HPD) near HDMI output terminal [JK431] indi-cate "Hi(3-5V)"?JK431HDMI OUT[MONITOR1]HPDCheck the TMDS. (HDMI OUT1) Check the HPD. (HDMI OUT1)NO NOYES YES135Caution inservicing Electrical Mechanical Repair Information Updating