Denon AVR-1612 Service Manual

Also see for AVR-1612: Specifications Getting started Owner's manual Manual Getting started

Contents

46TROUBLE SHOOTING1. POWER1.1. Power not turn onYES YESYESNONOYESNONO0.6V or -0.6VWhen the power turned on,does the ON/STANDBYindicator on the front panelflashing green?Is the fuse blown?About 10 seconds later,does the ON/STANDBYindicator on the front panelturn lighting green ?Check voltage of CN151 (1-2PIN) of DIGITAL B'D whilethe ON/STANDBY indicatoris flashing green.Pull out connector (CN703) ofMAIN BD, and check "2. Errorschecking mode".(Refer to 17 page.)Power not turn on.Is the fuse blown?When the power turned on,does the ON/STANDBYindicator on the front panelflashing red?Is a DC 5V voltage beingsupplied from the SMPSB'D (BN903) to the DIGITALB'D?Refer to 1.2.Fuse is blown.Refer to 1.2. Fuse is blown.Check circuitry and parts from CN151on the DIGITAL B'D to the μ-com fordamage and shortcircuits, and replaceany defective parts.Check "2. Errorschecking mode".(Refer to 17 page.)Are there any incompleteconnections in the connectorsconnecting between thevarious circuit boards?Is a DC 5V voltage outputwhen the cord supplying thepower from the SMPS B'Dto the DIGITAL B'D (CN151)is unplugged?Check μ-com peripherycircuitry of DIGITAL B'D andreplace any defective parts.Check circuitry and parts fromCN151 on the DIGITAL B'Dto the μ-com power supply fordamage and shortcircuits, andreplace any defective parts.Connect the connectors properly.To troubleshooting6. SMPS.(Refer to 60 page.)NOYESYES0VYES NONO NOCheck for leaks or shortcircuits in the primary sideparts, and replace anydefective parts.Fuse is blownCheck for short circuits in therectifier diodes and circuitry ofthe secondary side rectifyingcircuits, and replace anydefective parts.After repairing, also replace the fuse.Check for short circuits inthe power stabilizer unit'sregulator output terminal andthe ground, and replace anydefective parts.1.2. Fuse is blownYES