Denon AVR-X4500H Service Manual

Also see for AVR-X4500H: Owner's manual Owner's manual

When the results of check item (3-15.2.) are "22 or 11"(Detection of DDC is OK.)Check item(3-15.5.). Checking register of the TMDS CLK detection sta-tus register :Send the following command from Termite.exe.Send the command "i 0056 00FF 0001".When the following value is returned, go to YES.HDMI IN1 "88", HDMI IN2 "44", HDMI IN3 "22", HDMI IN4 "11"When the following value is returned, go to NO.HDMI IN1 "80", HDMI IN2 "40", HDMI IN3 "20", HDMI IN4 "10"Check item(3-15.6.). Checking the TMDS input waveform. :Check the TMDS waveform at the following test point.Is the waveform like the sample?HDMI IN142/43/45/46/48/49/51/52 pinHDMI IN255/56/58/59/61/62/64/65 pinHDMI IN380/81/83/84/86/87/89/90 pinHDMI IN493/94/96/97/99/100/ 102/103 pinIC381Checking the TMDS status register (HDMI Switcher2)Examplei 0056 00FF 0001Check for a short circuit in the pattern of theTMDS line of the HDMI Switcher2 [IC381] fromthe HDMI input terminal.If there is no problem, the HDMI Switcher2 [IC381]is faulty.Replace with a new device.HDMI Switcher2 [IC381] is faulty.Replace with a new device.Recheck from check item (3.3.)If it does not work, replace the PCB.YESNONONOYESYESCheck item(3-15.7.). Check the TMDS CLK detection status of the regis-ter.Send the following command from Termite.exe.Send the command "i 002E 00FF 0001".Is the return value "88" ?Checking the TMDS status register (HDMI Switcher2 -> HDMI Switcher1)Check item(3-15.8.). Checking the TMDS input waveform. :Check the TMDS waveform at the following test point.Is the waveform like the sample?42/43/45/46/48/49/51/52 pinIC391HDMI Switcher1 [IC391] is faulty.Replace with a new device.Recheck from check item (3.3.)If it does not work, replace the PCB.Check for a short circuit in the TMDS line.If there is no problem, the HDMI Switcher2 [IC381] is faulty.Replace with a new device.NOExample :If it is normal, "88" is returned.i 002E 00FF 000188YESTMDS Signal3.3VExample of waveform in check ①Voltage scale : 1.0V/divTime scale : 20ms/divTMDSExample of waveform in check ②Voltage scale : 1.0V/divTime scale : 1s/divTMDS Signal3.3VExample of waveform in check ①Voltage scale : 1.0V/divTime scale : 20ms/divTMDSExample of waveform in check ②Voltage scale : 1.0V/divTime scale : 1s/divBefore ServicingThis Unit Electrical Mechanical Repair Information Updating132