Denon DVD-2500BTCI Service Manual

Also see for DVD-2500BTCi - Blu-Ray Disc Player: Brochure & specs Specifications Dimensions Operating instructions Operating instructions

Contents

23DVD-2500BTCITROUBLESHOOTINGFLOW 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 power circuit.Check if there is any short-circuit on the rectifying diode and the circuit in each rectifying circuit of the secondaryside , and service it if defective. (D1010, D1011, D1016, D1018, D1023, IC2600, IC2601, Q2606, Q2608, Q2609, Q2610,Q2611)Does the photo coupler circuit on the secondaryside operate normally?Check IC1001, IC1003, D1006 and their periphery,and service it if defective.Check IC1003, D1009 and their periphery,and service it if defective.FLOW CHART NO.5-FL is not outputted.Is -30V voltage supplied to the emitter of Q2503? Check D1018, C1021 and periphery circuit,and service it if defective.Check Q2503 and their periphery, and service it ifdefective.Check FL-SW line and serviceit if defective.Is the "L" signal outputted to the collector ofQ2507?YesYesYesYes NoNoNoNoNoFLOW 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 AL+5V line voltage normal?See FLOW CHART No.2 Check if there is any leak or short-circuiting on theprimary circuit component, and service it if defective.(IC1001, Q1003, T1001, D1001, D1002, D1003,D1004, D1007, D1008, C1010, R1013)Check each rectifying circuit of the secondary circuitand service it if defective.YesYesYesNoNoNoIs 3.3V voltage supplied to the emitter of Q2504?YesIs 3.3V voltage outputted to collector of Q2504?Is the "H" signal inputted to the base of Q2507?Replace Q2507.Replace Q2504.Check EV+3.3V line and service it if defective.