Denon DVM725 Service Manual

Also see for DVM-725 - DVD Changer: Operating instructions Specifications Instrucciones de funcionamiento

Contents

Denon DVM725 Service Manual Manual pdf 13 page image

13DVM725TROUBLESHOOTINGFLOW CHART NO.2The fuse blows out.After servicing, replace the fuse.Check the presence that the primary componentis leaking or shorted and service it if defective.Check the presence that the rectifying diode orcircuit is shorted in each rectifying circuit ofsecondary side, and service it if defective.FLOW CHART NO.3When the output voltage fluctuates.YesNoFLOW CHART NO.4When buzz sound can be heard in the vicinity of AV circuit.Check if there is any short-circuit on the rectifying diode and the circuit in each rectifying circuit of the secondary side ,and service it if defective. (D1003, D1006, D1008, D1016, D1030, IC1002, Q1002, Q1004, Q1010, Q1011, Q1014)Does the photo coupler circuit on the secondaryside operate normally?Check IC1001, D1012, D1024 and their periphery,and service it if defective.Check IC1001, IC1006, D1015 and theirperiphery, and service it if defective.FLOW CHART NO.5-FL is not outputted.Is -24V voltage supplied to the anode of D1003? Check D1003 and periphery circuit, and service itif defective.Check if there is any leak or short-circuiton the loaded circuit, and service it if defective.YesNoFLOW CHART NO.1The power cannot be turned on.Is the fuse normal?Is normal state restored when once unpluggedpower cord is plugged again after several seconds?Is the EV +9V line voltage normal?Is each voltage of the secondary side normal?See FLOW CHART No.2 Check if there is any leak or shor-circuiting on theprimary circuit component, and service it if defective.(Q1001, Q1003, T1001, D1001, D1002, D1004,D1005, D1011, C1003, C1005)Check each rectifying circuit of the secondary circuitand service it if defective.YesYesYesIs the voltage of 3.3V supplied to pin(1) of IC3001?YesWhen pressing POWER button (SW2201), is thevoltage of 0V supplied to pin(38) of IC3001?YesReplace IC3001.YesNoNoNoNoCheck POWER button (SW2201) and theirperiphery, and service it if defective.NoCheck CHG+3.3V line and service it if defective.See FLOW CHART No.2 Nowww. xiaoyu163. comQQ 376315150 992894298TEL 13942296513 992894298051513673QQTEL 13942296513 QQ 376315150 892498299TEL 13942296513 QQ 376315150 892498299http://www.xiaoyu163.comhttp://www.xiaoyu163.com