Denon dvd-900 Service Manual

Also see for DVD-900: Operating instructions Specifications Operating instructions Operating instructions Service manual

Contents

- 13 -FLOW CHART NO.1FLOW CHART NO.2The power cannot be turned on.(1)FLOW CHART NO.3The fuse blows out.After servicing, replace the fuse.The power cannot be turned on.(2)Is the fuse normal?Is normal state restored when once unpluggedpower cord is plugged again after several seconds?Is the EV 5V line voltage normal?Is the voltage of secondary side normal?Does the change from STANDBY LED indicateturn-off?Is the voltage of 3.3V supplied to Q2021?Is the "H" signal inputted to the base of Q2021,when the POWER button activated on the DVD?Is the "H" signal inputted at base of Q2021,when the POWER button activated on the remotecontrol unit?Replace Q2021.The STANDBY LED indicate is flashing after 0.5 sec.Are the "P-ON-H" pulse outputted from thepin(20) of CN1001?Is the P-CON switch circuit operated normally?(Q1002, Q1005, Q1006, IC1002, D1036, D1046)Check the presence that the primary componentis leaking or short then service it if defective.See FLOW CHART No.3 Check if there is any leak or shor-circuit on theprimary circuit component?(Q1001, Q1003,T1001, D1001, D1002, D1004,D1005, D1011, C1003, C1005)Check each rectifying circuit of secondary circuit.Check the EV 3.3V line.Check the POWER button line.Check the line between the remote controlreceiver and Pin(26) of CN1001.Replace the DVD Main CBA Unit.Check each component, and replace.Check the presence that the rectifying diode orcircuit is shorted in each rectifying circuit ofsecondary side then service it if defective.YesYesYesNoNoNoNoNoNoNoNoNoNoYesYesYesYesYes (below, confirmed operating at LED turn-off of 0.5 sec. interval.)YesTROUBLESHOOTINGwww. xiaoyu163. comQQ 376315150 992894298TEL 13942296513 992894298051513673QQTEL 13942296513 QQ 376315150 892498299TEL 13942296513 QQ 376315150 892498299http://www.xiaoyu163.comhttp://www.xiaoyu163.com